DOMETIC Smart Touch Marine Cabin Control Instruction Manual

CLIMATE CONTROL
MARINE CABIN CONTROL Smart Touch
Cabin Control
Installation and Operating manual

Copyright

© 2024 Dometic Group. The visual appearance of the contents of this manual is protected by copyright and design law. The underlying technical design and the products contained herein may be protected by design, patent or pending patent. The trademarks mentioned in this manual belong to Dometic Sweden AB. All rights are reserved.

Important notes

Please read these instructions carefully and follow all instructions, guidelines, and warnings included in this product manual in order to ensure that you install, use, and maintain the product properly at all times. These instructions MUST stay with this product. By using the product, you hereby confirm that you have read all instructions, guidelines, and warnings carefully and that you understand and agree to abide by the terms and conditions as set forth herein. You agree to use this product only for the intended purpose and application and in accordance with the instructions, guidelines, and warnings as set forth in this product manual as well as in accordance with all applicable laws and regulations. A failure to read and follow the instructions and warnings set forth herein may result in an injury to yourself and others, damage to your product or damage to other property in the vicinity. This product manual, including the instructions, guidelines, and warnings, and related documentation, may be subject to changes and updates. For up to date product information, please visit documents.dometic.com.

Explanation of symbols and safety instructions

This manual has safety information and instructions to help you end or reduce the risk of accidents and injuries.
2.1 Understanding signal words
WARNING! Indicates a hazardous situation that, if not avoided, could result in death or serious injury.
CAUTION!
Indicates a hazardous situation that, if not avoided, could result in minor or moderate injury.
NOTICE!
Indicates a situation that, if not avoided, can result in property damage.
NOTE Supplementary information for operating the product.
2.2 Supplemental directives

• Read and follow all safety information and instructions.
• Read and understand these instructions before installing or operating this product.
• American Boat and Yacht Council (ABYC) E-11 AC and DC Electrical Systems on Boats
• ANSI/NFPA70, National Electrical Code (NEC)

2.3 General safety messages
WARNING! ELECTRICAL SHOCK, FIRE, AND/ OR EXPLOSION HAZARD.
Failure to obey the following warnings could result in death or serious injury: Service and maintenance must be done by a qualified service person only.

• Use only Dometic replacement parts and components that are specifically approved for use with the appliance.
• Avoid improper installation, change, alterations service, or maintenance of the appliance.
• **** NOTICE! Failure to obey this notice could lead to water deepfreezing in the condenser coil which can damage to the unit.
• Do not operate the air conditioner unit in water that is cooler than 38 °F (3.33 °C).
• Do not change this product in any way.

Intended use

The Dometic Smart Touch Cabin Control is a microcontroller-based unit designed for use with direct expansion (DX), reverse-cycle air conditioner systems and and chilled water (CW) systems.
The Smart Touch Cabin Control offers 22 programmable parameters for custom installations, including a dehumidification mode to control relative humidity and de-icing to prevent evaporator coil icing. The system offers a nonvolatile memory that retains settings without batteries and CAN-bus network capability. Optional sensors are  available for further customization.
Dometic Corporation reserves the right to change appearances and specifications without notice.

• Faulty assembly or connection
• Damage to the product resulting from mechanical influences and excess voltage
• Alterations to the product without express permission from the manufacturer
• Use for purposes other than those described in the operating manual

General information

This section provides all the necessary information on the product features, tools and materials required for installation and operation of the Smart Touch Cabin Control, and high-level screen displays.
Poor installation and misunderstood operating parameters will result in unsatisfactory performance and possible failure.
NOTE The images used in this document are for reference purposes only.
Parts and part locations may vary according to specific product models. Measurements may vary ± 0.39 in (± 10 mm).
4.1 How it works
This section describes the affects of seawater on a marine climate control system.

• Cool mode operation. The air conditioner unit operates most efficiently in sea- water temperatures below 90 °F (32.22 °C). At higher seawater temperatures, the unit will operate at a reduced capacity. A high-pressure shutdown may occur at higher seawater temperatures.
• Heat mode operation. As the seawater gets colder, less heat is available and the heating efficiency is reduced. Full heating capacity is obtained at about 55 °F (12.78 °C) seawater temperature. Performance drops to about 50 % of the rated capacity in 40 °F (4.44 °C) water. In water temperatures below 40 °F (4.44 °C), the system pressure can be so low that the unit will shut down on a low-pressure fault. This problem is compounded when the cabin is also cold. See Troubleshoot ing for more information.

4.2 Tools and materials
Dometic recommends that the following tools and materials be used while installing the appliance:
Recommended Tools

Phillips-head Screwdriver| Saw
Thermal Mastic
---|---
Safety Glasses
Multimeter|
Additional Parts| DX| CW
---|---|---
Required for CW installa- tions (not included)| |
Water Inlet Temperature Sen- sor| | X
Optional Parts| |
Outside Air Temperature (OAT) Sensor| X| X
Inside Air Temperature Sensor| X| X
Room Temperature/Relative Humidity Combination Sensor| X| X
Seawater Low-Limit Tempera- ture Sensor| X|
Pump Sentry Water Sensor| X|

NOTE The maximum length for display and sensor cable is 75 ft (22.86 m).
Optional items are not included with the standard control package.
4.3 Understanding the menu screen layout
This screen is an example of a typical menu screen and navigation buttons. Actual menu screens may vary in appearance.

4.4 Understanding the settings screen layout
This screen is an example of a typical settings screen. Actual settings screens may vary in appearance.

operation.
6| Down| Decreases the set point by one degree with each press and release operation.

4.5 Understanding the home screen
This starting screen displays when the Smart Touch Cabin Control is turned on.

delay is on/enabled with a press and release.
2| Temperature| Cycles through available set point(s) (in- side, outside, service, water, and humidity temperatures) with a press and release.
3| Main Screen| Displays the main screen with a press and release.
4| Status| Indicates the system status (off, pending, active, standby, or fault).
5| Up| Displays the set point with a press and release. Press and release the up icon as many times as desired to increase the set point. The set point increases one de- gree with each press and release.
6| Down| Displays the set point with a press and release. Press and release the down icon as many times as desired to decrease the set point. The set point decreases one degree with each press and release.
7| Power| Toggle between On and Off with a press and release.

4.6 Understanding the main screen
Enter from the home screen to access the most basic functions as well as the menu for more options.

automatic mode cooling cycle.
Heat| Indicates the system is in heating mode or when the unit is in an automatic mode heating cycle.
Auxillary Heat| Indicates aux heat-only mode or when the unit is in an automatic mode auxiliary heating cycle.
Dehumidification| Controls humidity when the vessel is un- occupied.
7| Status| Shows if a fault has occurred.
8| Schedule| Shows a schedule program is active and the specific times and days.
9| Up| Increases the set point one degree with a press and release.
10| Down| Decreases the set point one degree with a press and release.
11| Power| Toggles between On and Off mode.

Specifications

This section describes the display, sensor, cabling, environmental, and electrical specifications for the unit.

Installation Specifications

Display Dimensions
Display Panel| 110 mm × 73 mm
Panel Cut Out| 74 mm × 55 mm
Cable Lengths
Display Cable Self-Contained| 15 fl (4.57 m) Standard
Inside Air Temperature Sensor (optional)| 7 fl (2.13 m) Standard
OAT Sensor (optional)| 15 fl (4.57 m) Standard
All custom cable lengths supplied in standard 5 fl (1.52 m) increments| 57 fl (17.37 m) Maximum
Sensor Inputs
High Refrigerant Pressure| 1
Low Refrigerant Pressure (optional)| 1
Inside Air Temperature Sensor (optional)| 1
OAT Sensor (optional)| 1
Pump Sentry Water Sensor (optional)| 1
Room Temperature/Relative Humidity Combi- nation Sensor (optional)| 1
Water Inlet Temperature Sensor (CW Installa- tions Only)| 1
Operational Specifications

Environmental
Set Point Operating Range| 18.33 °C … 29.44 °C
Ambient Temperature Operating Range Dis- played| – 15 °C … 65.55 °C
Sensor Accuracy| ± 2 °F @ 77 °F (± 1 °C @ 25 °C)
Minimum Operating Temperature| 0 °F (– 17.78 °C)
Maximum Ambient Operating Temperature| 180 °F (82.22 °C)

Operational Specifications
Environmental

Operational Specifications

Electrical
Low Voltage Limit 110–120 Volt Units| 95 V
Low Voltage Limit 208–240 Volt Units| 195 V
Low Voltage Processor Reset| 50 V
Universal Line Voltage| 100 V  to 240 V
Frequency| 50 Hz or 60 Hz
Fan Output| 6 A @ 115 V
6 A @ 230 V
Valve Output| 0.25 A @ 115 V /230 V
Heater Output (using valve relay)| 15 A @ 115 V
10 A @ 230 V
Aux Heater Output (using off-board relay)| 30 A @ 115 V /230 V
Pump Output| 0.25 hp (0.19 kW) @ 115 V
0.5 hp (0.37 kW) @ 230 V
Compressor Output| 1 hp (0.75 kW) @ 115 V
2 hp (1.49 kW) @ 230 V
Maximum Rh Conditions| 99 % Non Condensing
Power Consumption| < 5 W

Wiring diagrams

The following diagrams show the part connections for the direct expansion (DX) and chilled water (CW) systems.
WARNING! ELECTRICAL SHOCK
Turn the power off before opening the electrical box. Failure to do so could result in death or serious injury.
Understanding the DX Wiring Diagram

Understanding the CW Wiring Diagram

Installation and setup

This section describes how to install and set up the Smart Touch Cabin Control.
NOTICE! The system ‘s built-in air sensor is located in the control display panel.

• You must locate the display on an interior wall at eye level.
• Do not locate in direct sunlight or inside a cabinet.
• If these conditions cannot be met, you must buy the optional inside air temperature sensor and install it in the return-air stream.
• Do not use a screw gun and do not overtighten the screws when mounting the display because either method may damage the display.
• Do not staple sensor cables when mounting.

7.1 Choosing the location
This section describes the location requirements.

1. Before mounting the control panel, consider the location. The display panel’s builtin air sensor provides excellent room-air temperature sensing when properly located and installed. For the sensor location on the display panel, see Figure 9 under In stalling the Display Panel.
2. • Install the display on an inside wall, slightly higher than mid-height of the cabin.
   • Select a location with freely circulating air where the temperature sensor can best sense average temperature.
   • Select a location within 15 ft (4.57 m) of the air conditioner to accommodate the length of the display cable (custom lengths are available).
   • Avoid installing the display in direct sunlight, near any heat-producing appliances, or in a bulkhead where temperatures radiating from behind the panel may affect performance.
   • Avoid installing the display in the supply air stream, above or below a supply air or return-air grille, behind a door, in a corner, under a stairwell, or any place where there is no freely circulating air.
   NOTE If you cannot mount the display in a suitable location, install the optional inside air temperature sensor.

7.2 Installing the display panel
This section describes how to mount the display panel.

1. Make the cut-out for the display panel to measure 2.91 in (74 mm) wide by 2.20 in (56 mm) high.
2. Plug the 8-pin connector end of the display cable into the upper-right socket on the circuit board in the electric box.
3. Plug the other end to the back of the display panel.
4. Secure the display panel to the bulkhead using the four screws provided.
5. When the display is securely mounted, place the bezel over the display frame and snap into place.

7.3 Installing the optional sensor hardware
This section describes where and how to mount more sensors.
7.3.1 Inside air temperature sensor
NOTE The sensor’s distance from the air conditioner must be within the 7 ft(2.13 m) standard cable length.

1. Mount the sensor in the return-air stream behind the opening of the return-air grille.
2. Plug the 6-pin connector cable into the inside jack #J3 in the upper-le corner of the circuit board.

7.3.2 Outside air temperature sensor
NOTE The sensor’s cables are available in various lengths.

1. Mount the sensor outside, but not in direct sunlight.
2. Plug the cable into the OAT plug #P6.

7.3.3 Room temperature/relative humidity sensor
NOTE The control board automatically detects the this sensor and immediately starts measuring humidity.

1. Mount the sensor in the same location as the optional inside air temperature sensor.
2. Plug the sensor’s 6-pin connector into the inside temperature socket at the edge of the circuit board.

7.3.4 Pump sentry water sensor – DX only
NOTE This sensor must be enabled with the Pump Sentry feature. See section “Understanding the DX Operational Settings”

1. Mount the sensor at the condenser coil outlet and install insulation around it.
2. Plug the sensor into the H2O OUT plug #P5.

7.3.5 Seawater low-limit temperature sensor – DX only
Install this optional DX sensor to check the temperature of the seawater feeding the air conditioner.

1. Mount the sensor in direct contact with the copper pipe, using thermal mastic to ensure a good heat transfer.
2. Strap the sensor wire in place for strain relief and to prevent the sensor from being accidentally removed.
3. Plug the sensor’s 2-pin connector into the loop water out (blue) socket located on the circuit board.

7.3.6 Water inlet temperature sensor – CW only
Install this optional CW sensor to check the water temperature.

1. Ensure the sensor has good contact with the copper pipe.
2. Attach the sensor to the chilled-water inlet on the air handler.
3. Plug the water inlet sensor cable into the H2O IN plug # P4.

NOTE Do not attach to a rubber hose.

Commissioning the system

NOTICE! Do not turn the unit off and then immediately turn it back on.
Allow at least 30 seconds for the refrigerant pressure to equalize.
8.1 Commissioning procedure
This section outlines the commissioning procedure to test the main inputs and outputs of a new system. The procedure also offers guidance when selecting important system settings.
NOTE The commissioning procedure varies depending on the CW or DX system.
To begin with the commisioning procedure:

1. Ensure the seawater-intake ball valve/seacock is open.

2. Make sure the control is powered Off.

3. Turn on the air conditioner circuit breaker and the seawater pump circuit breaker, if installed.

4. Turn the control On.

5. Press the Fan icon, and verify that the fan is running and that there is steady airflow out of the supply air grille.

6. Select a temperature set point lower than the current cabin temperature to start the compressor and seawater pump.

7. Check for a steady solid stream of water from the overboard discharge.

8. Verify there is steady airflow from the supply air grille.
   If the unit does not appear to be operating properly, see section “Troubleshoot ing”.

9. To navigate through the commissioning procedure:
   a) Press the Home button to exit the procedure.
   b) Press the Back arrow to exit the procedure and return to the menu.
   c) Press the Down arrow to continue with the next step.

8.2 Commissioning steps for CW and DX systems
The steps in the commissioning procedure vary depending on whether the system is a chilled water (CW) or a direct expansion (DX) air conditioning system.
These tables clarify the commissioning procedures for the CW system, followed by the DX system.
CW and DX – Commissioning Procedure Screens 1 – 5

The following system components were detected to configure:
• Chilled water system with electric heater
• Alternative air sensor is connected
• Direct expansion system without electric heater
To change these settings:
1. Exit the commissioning procedure.
2. Adjust the program parameters.
3. Then run the commissioning procedure again.
4. Press the Down  button to continue.
2| Inside Temperature Sensor
1. If using the display sensor, make sure the display is not located in direct sunlight, near an outside door, or near the supply air stream.
2. If using an alternative air sensor, make sure it is placed in the return- air stream.
3. Press the Down  button to continue.
3| Low Fan Speed Test
The fan is now energized at the above mentioned speed. Verify the supply air flow and the acoustics are correct.
To change these settings:
1. Exit the commissioning procedure.
2. Adjust the program parameters.
3. Then run the commissioning procedure again.
4. Press the Down  button to continue.
4| Medium Fan Speed Test
The fan is now energized at the above mentioned speed. Please verify the supply air flow and the acoustics are correct.
To change these settings:
1. Exit the commissioning procedure.
2. Adjust the program parameters.
3. Then run the commissioning procedure again.
4. Press the Down  button to continue.
5| High Fan Speed Test The fan is now energized at the above mentioned speed. Please verify that the supply air flow and the acoustics are correct.
To change these settings:
1. Exit the commissioning procedure.
2. Adjust the program parameters.
3. Then run the commissioning procedure again.
4. Press the Down  button to continue.
CW only – Commissioning Procedure Screens 6 – 10
6| Water Temperature Sensor The water temperature reading is 49 °F (9.44 °C). The difference between the water temperature and the inside temperature must exceed the differential setting to open the valve.
1. Exit the commissioning procedure.
2. Adjust the program parameters.
3. Then run the commissioning procedure again.
4. Press the Down  button to continue.
7| Water Valve Test
The water valve output test is now running and the valve output is energized.
1. Please verify that the valve is open and that the supply air is cooler than the room ambient temperature.
2. Press the Down  button to continue.
8| Electric Heater Test
The electric heater output test is now running and the electric heater is energized.
1. Please verify that the heater is operating and that the supply air is warmer than the room ambient temperature.
2. Press the Down  button to continue.
9| Auxiliary (Aux) Heater Test
The aux heater output test is now running and the aux heater is energized.
1. Please verify that the heater is operating and that the supply air is warmer than the room ambient temperature.
2. Press the Down  button to continue.
10| Pass Confirmation
The commissioning procedure is now completed. Press the Down  button to continue.
DX only – Commissioning Procedure Screens 6 – 11
Screen 6| Description
6| Fault Check
No faults are detected.
If the system has a low-pressure switch, verify that it is wired and its enable jumper on the main board is cut.
Press the Down  button to continue.
7| Pump Test
The seawater pump test is now running and the pump output is energized.
1. Please verify that the seawater pump is on and pumping water overboard.
2. Press the Down  button to continue.
8| Cool Test
The cooling cycle test is now running and the compressor should start within 15 seconds.
1. Please verify that the compressor is operating and the supply air is cooler than the room ambient air temperature.
2. Press the Down  button to continue.
9| R/C Heat Test
The reverse-cycle heating test is now running and the compressor should start within 15 seconds.
1. Please verify that the compressor is operating and the supply air is warmer than the ambient air temperature.
2. Press the Down  button to continue.
10| Auxiliary (Aux) Heat Test
The aux heater output test is now running and the aux heater is energized.
1. Please verify that the heater is operating and the supply air is warmer than the ambient air temperature.
2. Press the Down  button to continue.
11| Pass Confirmation
Congratulations!
The commissioning procedure is now completed. Press the Down  button to continue.

Operation

This section describes the operating features.

1. Use the main menu settings to adjust the operating parameters and to fine-tune the system for the most efficient operation. Variables such as ducting, sensor location, and system layout affect the system op- eration.
   The control has factory default settings stored in permanent memory that can be re- called.

2. The control has factory default settings stored in permanent memory that can be re- called. To return to the default settings, select main menu > control parameters > recall defaults.

3. Reprogrammed, new settings can be saved as memorized settings, and then recalled and saved at any time. To use the reprogrammed settings, select main menu > control parameters > memorize settings > recall memorized.
   See section in full manual “Understanding the Memory Settings“ for more information.

9.1 Understanding the operating cycles
This section describes how the system responds during normal heating and cooling cycles.
Automatic mode
Heating and cooling are supplied as required.
A cooling cycle will start when the cabin temperature exceeds the set point by 2 °F (1 °C) and will continue to cool until the temperature equals the set point. See the section in full manual set point temperature differential for instructions on how to reduce this variation to 1 °F (1 °C). To switch from cooling to heating, the cabin temperature must drop below the set point by at least 4 °F (2 °C). Similarly, if heating is required, a heating cycle will start when the cabin temperature is below the set point by 2 °F (1 °C) and will continue to heat until the temperature equals the set point.
The cabin temperature must exceed the set point by at least 4 °F (2 °C) to switch from heating to cooling.
Cool or heat mode

• By selecting cool mode, only cooling is supplied.
• By selecting heat mode, only heating is supplied.

See the section set point temperature differential for instructions on how to reduce this variation to 1 °F (1 °C)
When the heating or cooling set point is satisfied, the compressor cycles off and the fan returns to low speed.
The fan speed remains constant if manual fan speed is selected. For more information on this feature, see “Understanding the Operating Modes.
CW systems
This section applies to CW systems only.

1. The fan remains in low speed until an adequate water temperature is available. Heat will be supplied when no heating is available (water temperature is inadequate) only if the optional electric heater is installed and programmed. An adequate cooling or heating water temperature is defined by the water temperature differential setting, under CW control parameters. The factory default is set at a 15 °F (8 °C) differential from the ambient air temperature.

Reversing valve
This section applies to DX systems only.

• When the system is running and heating or cooling is required, the reversing valve toggles to the opposite mode to reduce the starting surge of the compressor.
• When a cooling or heating cycle is called for and if the system has been off for less than five minutes.
•  When a cycle is interrupted from the display panel by pressing the power icon or changing the set point.

9.2 Understanding the operating modes
This section describes the available operating modes.
Off
All control outputs are turned off. All settings are saved in nonvolatile memory.
On
Power is supplied to the appropriate outputs and the display indicates the current state of operation. The operating and program parameters resume based on those last stored when the unit was operating.
Automatic
The system provides heating and cooling as required. The automatic mode icon displays the cabin temperature in a given mode and is maintained within 2 °F (1°C) of the set point by default. See the section set point temperature differential for instructions on how to reduce this variation to 1 °F (1 °C) If the system was most recently cooling, the cabin temperature must drop below the set point by at least 4 °F (2 °C) for the system to switch from cooling to heating.
Similarly, if the system was most recently heating, the cabin temperature must exceed the set point by at least or 4 °F (2 °C) for the system to switch from heating to cooling. This behavior prevents small temperature overshoots from causing the system to switch between heating and cooling when it is not necessary.
Cool
The cooling mode icon displays and only the cooling system operates as required. If the ambient temperature drops below the set point, the system will not automatically switch to heat mode.
Heat
he heating mode icon displays and only the heating system operates as required. If the ambient temperature rises above the set point, the system will not automatically switch to the cool mode.
Dehumidification
The dehumidification mode helps to control humidity while away from the boat or away from a particular cabin. The dehumidification mode will also prevent the boat or a particular cabin from dropping below a minimum temperature to prevent the contents from freezing. When the temperature drops low, eliminating moisture may become less of a concern and maintaining some minimum temperature may become more important. The change range is 40.0 … 75.0 °F (4.44 … 23.88 °C). To adjust the 50 °F (10 °C) factory default to a different temperature, see full manual for section humidity mode minimum temperature.
While the control is in On mode, press the mode icon until the dehumidification mode icon displays. Once the dehumidification mode is enabled, the fan circulates the air for 30 min. During this time, the air temperature is sampled and entered into memory. After 30 min, a cooling cycle starts and continues until the temperature is lowered 2 °F (1°C) or until the cooling cycle runs a maximum of one hour. Four hours after the temperature is satisfied or the cooling cycle times out, this cycle repeats. After the 30 min fan circulation, if the temperature is at or above the factory default setting of 50 °F (10 °C), a cooling cycle starts and runs as described above. However, if the temperature is below 50 °F (10 °C), a heating cycle will begin. The heating cycle will continue until the temperature reaches 50 °F (10 °C) or until the heating cycle runs a maximum of one hour.
NOTE For DX systems only: on systems configured with reverse-cycle heat, the dehumidification mode heat cycle will not run when the ambient temperature is below 40 °F (4.44 °C).
This protects the condenser coil from freezing. Systems configured with auxiliary electric heat will run the dehumidification mode heat cycle regardless of the room temperature.
The word Dehumidify displays when the control is in dehumidification mode. It flashes if the optional humidity sensor is connected and operating in the cooling mode.
9.3 Understanding the fan modes
This section describes the available fan modes.
Automatic
The automatic fan mode allows the Smart Touch Cabin Control to decide the required fan speed based on the temperature differential. This permits a balance between the most efficient temperature control and slower, quieter fan speeds.
Three automatic fan speeds are available: high, medium and low.
To select automatic fan mode, press and release the Fan icon until the word Auto displays above the graph.
Automatic
The automatic fan mode allows the Smart Touch Cabin Control to decide the required fan speed based on the temperature differential. This permits a balance between the most efficient temperature control and slower, quieter fan speeds.
Three automatic fan speeds are available: high, medium and low.
To select automatic fan mode, press and release the Fan icon until the word Auto displays above the graph.
Fan-only
The fan-only mode operates the fan for air circulation when no cooling or heating is desired.

1. Beginning in Off mode, press and release the Fan icon until the desired speed is reached.
2. Press and release a fourth time to turn off the fan or place it in auto mode.

NOTE Turning on the control will revert the fan to the automatic mode or the last selected manual fan setting.
Cycled fan
The cycled fan mode operates the fan only during heating or cooling cycles.
When used with an optional electric heater, the fan remains on for four minutes after the heater cycles off.
Continuous fan
The continuous fan mode operates the fan continuously as long as the system is in On mode.

Control parameters

This section describes the settings available in the different software menus.
NOTICE! If the unit is cool-only (does not have a reversing valve), change the DX operational setting Heat Pump/Cool Only mode to “Cool Only”.

• Once this parameter is set, the operational mode selections are limited to off, cool, optional auxiliary heat, and dehumidification.
• Failure to obey this notice will cause the unit to cool in both modes. See the section Heat Pump/Cool-Only Mode under Understanding the DX operational settings topic.

NOTICE! If the air conditioner has a shadedpole (SP) fan motor, youmust program “SP” into general setting 8 (fan motor type) before operating the equipment.

• The SP unit has an overhanging blower motor. However, the split-capacitor (SC) high-velocity (HV) fan motor is inside the blower, and the unit will have “VTD” or “HV” in the model number.
• Only reprogram this general setting if you do not have an HV blower.

10.1 Understanding the general settings
This section describes the options available in general settings. To locate the general settings screen:

increases the fan speed
and a lower number slows the fan speed.| 1. Tap Main Menu.
2. Tap Control Parameters.
3. Tap General Settings.
4. Then tap High Fan Speed.
Medium Fan Speed| Sets a mid fan-speed limit from 32 to 85. A higher number increases the fan speed
and a lower number slows the fan speed.| 1. Tap Main Menu.
2. Tap Control Parameters.
3. Tap General Settings.
4. Then tap Medium Fan Speed.
Low Fan Speed| Sets a lower fan-speed limit from 30 to 75. Set a higher number to increase or a lower number to slow the fan speed.| 1. Tap Main Menu.
2. Tap Control Parameters.
3. Tap General Settings.
4. Then tap Low Fan Speed.

For Selection 4,5, and 6

the optional
inside air temperature sensor within a range of ± 50 °F (± 10 °C)| 1. Tap Main Menu.
2. Tap Control Parameters.
3. Tap General Settings.
4. Then tap Inside Temp Calibration.
5. Adjust ± 50 °F (± 10 °C) parameter to display the correct room temperature.
NOTE   The setting increments are in °F even when the control is set to display °C.
Temperature Units (°F/°C/ Auto)| Changes the temperature units from the default F to C. Celsius readings display in tenths (for example 2.2 °). Auto corresponds to “automatic by line frequency”, where 60 Hz automatically sets the unit to Fahrenheit (F), and 50 Hz automatically sets the unit
to Celsius (C).| 1. Tap Main Menu.
2. Tap Control Parameters.
3. Tap General Settings.
4. Then tap Temperature Units (°F/°C/Auto).
Reversed Fan Spd in Heat| Improves heat output in cooler climates. Automatic fan speeds during heating automatically reverse the fan speed during heat
mode. The fan speeds up as the set point is approached. The fan
switches to low speed when the set point is satisfied and the compressor cycles off.| 1. Tap Main Menu.
2. Tap Control Parameters.
3. Tap General Settings.
4. Then tap Reversed Fan Spd in Heat.

NOTE Lowering the fan speed when the cabin is cold increases the head pressure and helps raise the supply temperature. Increasing the fan speed as the set point is approached also reduces unnecessary high-pressure faults. The fan can be programmed to operate the same as in cooling by selecting the Off option, which represents normal fan operation during reverse-cycle heating.
For Selection 7,8, and 9

Auxiliary Heat
Option| Allows optional heat,
based on the system (DX
or CW). Set to On to enable reverse-cycle and auxiliary
electric heat. Set to Off for reverse-cycle heat only.| For DX Applications Allows an optional auxiliary electric heater to operate, if installed.
1. Repeat steps 1 to 3 from earlier actions.
2. If not installed, select Off.
3. To use reverse-cycle and auxiliary electric heat select On.
4. Select Auxiliary Heat Option, to allow the auxiliary electric heater to operate at the same time as the reverse-cycle heating when the dehumidification feature is active and required.
NOTE   Auxiliary heat output will also operate when using the optional seawater lowlimit change or the auto changeover feature, if enabled. See the seawater  low-limit ad justment| For CW Applications
Allows an optional auxiliary electric heater to operate.
1. Repeat steps 1 to 3 from earlier actions.
2. To use electric heat and/ or hydronic heat, select On.
Selecting On allows the electric heater to operate at the same time as the hydronic valve when the dehumidification feature is active and required. The compressor and auxiliary heat spade terminal outputs will energize when CW electric heat is called for.
3. Select Off (default) to use only hydronic heat.
NOTE   Please consult with Dometic Customer Service or with an authorized service technician for help.
Fan Motor Type| Use the default split
capacitor setting for
air conditioners with
high-velocity blowers.| 1. Repeat steps 1 to 3 from earlier actions.
2. Then tap Fan Motor Type.
NOTE   Only change the setting to shaded pole if the unit has a shaded pole fan motor, recognizable by a blower-motor overhang.
NOTE   The split capacitor motor of a high-velocity unit is inside the blower, and the unit has “VTD” or “HV” in the model number.
Filter Hours Setting| Enables a reminder to clean or replace the air filter. The default setting
is off.| 1. Repeat steps 1 to 3 from earlier actions.
2. Then tap Filter Hours Setting.
3. Select the number of operating hours until the filter re- minder appears. Parameter choices are between 100 h and 2500 h. Once set, the timer tracks the total amount of run hours that the fan accumulates. When the timer setting is reached, the status icon flashes briefly until it is cleared. The room temperature continues to display and the normal system operation is not affected.
4. To clear and reset the timer, tap General Setting and then Filter Hours Setting.
NOTE  Dometic recommends checking the air filter at least every 500 h of operation.

For Selection 10,11, and 12

actions.
2. Then tap Filter Hours Reset.
3. Tap the CLR icon to clear the reminder.
This resets the value to 0 and restarts the timer.
1. Repeat steps 1 to 3 from earlier actions.
2. Then tap CAN-bus Unit ID.
CAN-bus Unit ID| Displays only when the CAN-bus network capability is available and the Smart Touch Cabin Control is plugged into a networked control board with the CAN-bus daughterboard option. If the Smart Touch Cabin Control is plugged into a standard control board, this parameter is unavailable and the icon is grayed out. Each control on the same CAN-bus network must be assigned a unique Unit ID (0–255). For example, the control set to 5 responds to commands with a destination address of 5.| 1. Repeat steps 1 to 3 from earlier actions.
2. Then tap CAN-bus Unit ID.
CAN-bus Group ID| Displays only when the CAN-bus network capability is available, and the Smart Touch Cabin Control is plugged into a networked control board with the CAN-bus daughterboard option. If the Smart Touch Cabin Control is plugged into a standard control board, this parameter is unavailable and the icon is grayed out. Assign the address for the control’s CAN-bus network group (0–255). This number should be unique and different from any CAN-bus unit ID. For example, all controls that are set to 100 will respond to commands with a destination address of 100 (in addition to responding to commands that target their individual Unit IDs).| Displays only when the CAN-bus network capability is available, and the Smart Touch Cabin Control is plugged into a networked control board with the CAN-bus daughterboard option. If the Smart Touch Cabin Control is plugged into a standard control board, this parameter is unavailable and the icon is grayed out. Assign the address for the control’s CAN-bus network group (0–255). This number should be unique and different from any CAN-bus unit ID. For example, all controls that are set to 100 will respond to commands with a destination address of 100 (in addition to responding to commands that target their individual Unit IDs).

For Selection 13,14, and 15

Selection

| Description|

Action

---|---|---
Volt- meter Cali- bration| Displays a live reading of the volt- age as read by the power and log- ic circuit board.| 1.       Repeat steps 1 to 3 from earlier actions.
2.       Then tap Voltmeter Calibra- tion.
3.       Tap the UP or Down icons to calibrate the line voltage reading.
| | Calibrating this parameter provides a more exact voltage level when calcu- lating low voltage. Use a reliable volt- meter as a reference when adjusting this parameter.
Set Point Temper- ature Differ- ential| Sets the temperature differential in Fahrenheit for all modes of opera- tion: automatic, cool, or heat. By default, this parameter setting is or 2 °F (1 °C). It can be set to either 1
°F (1 °C) or 2 °F (1 °C). In most cas- es, the factory default is adequate to maintain a comfortable temper- ature variation around the desired set point.| 1.       Repeat steps 1 to 3 from earlier actions.
2.       Then tap Set Point Tempera- ture Differential.
3.       See section “Understanding the Operat ing Modes” for how this setting affects the modes.
| To maintain the room tempera- ture closer to the desired set point with less temperature variation, set the parameter to or 1 °F (1 °C) . Frequent, shorter duration cool- ing or heating cycles may occur.
Humidity Mode Min Temp| Sets the minimum room temperature (Fahrenheit) for the dehu- midification mode to run a cool- ing cycle to remove air moisture. If the room temperature falls below the setting, the dehumidification mode will run a heating cycle. The default setting is 50 °F (10 °C), and it can be adjusted between 40.0 °F … 75.0 °F (4.44 °C … 23.88 °C)| 1.       Repeat steps 1 to 3 from earlier actions.
2.       Then tap Humidity Mode Min Temp.
3.       See “Dehumidification” for the dehumidification mode functions.

For Selection 16,17, and 18

cumulative steps) between the ambient and set point temperatures at which the fan speed will increment to the next speed.
NOTE   Note there is 1 °F hysteresis in the auto fan speed differential to prevent the speed from changing if the room temperature changes by a fractional degree causing speed fluctuations. Both the reversed fan speeds in heat setting, and the set point temperature differential setting, have an effect on the operation of the auto fan speed.| 1. Repeat steps 1 to 3 from earlier actions.
2. Then tap Auto Fan Speed Temp Differential.
Supply Air Temp Limit| Sets the maximum supply air discharge temperature allowed, and shuts down the heat mode if the temperature sensor exceeds the programmed set point. If this condition is met, there is no fault indicator or lockout.| 1. Repeat steps 1 to 3 from earlier actions.
2. Then tap Supply Air Temp Limit.
3. Before enabling, set the general setting aux heat option to On.
4. Place the OAT sensor in the supply air stream immediately downstream
of the blower discharge.
NOTE   The heat mode will be restored once a 10 °F hysteresis has been
satisfied. The heat mode will also be restored if the power is cycled to the control and the OAT sensor temperature is less than the setting but still
within the hysteresis.
5. Tap the Temperature icon to display the discharge temperature, until
the temperature title shows the same as outside air temperature.
DX/CW Mode Selection| | 1. Repeat steps 1 to 3 from earlier actions.
2. Then tap DX/CW Mode Selection.
3. Choose Set by Jumper to preserve the status of the control board operation.
• If the “Removed for CW” jumper on the main control board is not removed, the Smart Touch Cabin Control will operate in DX mode.
• If the Removed for CW” jumper is removed, the Smart Touch
Cabin Control will operate in CW mode.
• The other choices for this parameter allow the jumper to be overridden,
if desired.

For Selection 19,20, and 21

plugged into the control board, it overrides the display built-in temperature sensor. If the optional inside air temperature sensor is not plugged into the control board, the display uses the display built-in temperature  zensor for the inside temperature. This behavior can be overridden, if desired.| 1. Repeat steps 1 to 3 from earlier actions.
2. Then tap Inside Temp Snsr Select.
Fan Operate Mode| Sets the fan to run continuously whenever the system is turned on, or to cycle on and off in conjunction with the cooling or heating cycles.| 1. Repeat steps 1 to 3 from earlier actions.
2. Then tap Fan Operate Mode.
Dual Temp Set Points| Allows two separate set points, one for cooling and one for heating. When turned off, only one common, adjustable set point for both heating and cooling is used.| 1. Repeat steps 1 to 3 from earlier actions.
2. Then tap Dual Temp Set Points.

For Selection 22

Selection| Description|

Action

---|---|---
Humidity Control Set Point| For DX applications If the op- tional humidity sensor is connect- ed to the control board, and if the auxiliary electric heat is in- stalled and enabled, this feature allows the system to dehumidify with auxiliary electric heat when the cabin humidity rises above 60 % (default) relative humidi- ty (RH). The range of change is 50 % … 80 % RH.
• The electric heater will cycle on and off to main- tain the set point while the compressor turns on to deumidify. When the room reaches the set point, the compressor will remain on. The display will indicate dehumidification mode.
•     If the temperature decreas- es by one degree, the aux- iliary electric heat turns on to maintain the set point and the compressor re- mains on. If the tempera- ture increases to the set point, the electric heat turns off. If the tempera- ture increases one degree above the set point, the compressor remains on.| For CW applica- tions If the option- al humidity sensor is connected to the control board, and if the electric heat is in- stalled and enabled, this feature allows the system to dehumidify with electric heat when the cabin humidity rises above 60% (default) relative humidity (RH). The range of change is 50 % … 80 % RH
•     The electric heater cycles on and off to maintain the set point while the by pass valve opens to allow cold loop wa- ter to enter the air handler coil to dehumidify. This continues until the cab- in’s relative hu- midity is less than 60 %.| 1.Repeat steps 1 to 3 from earlier actions.

2. Then tap Hu- mid. Ctrl Set Point.

| •  This cycle continues until the cabin’s relative huidity is less than 60 %. If an electric heater is not installed, the compressor run time extends by operat- ing to 1 °F or (1 °C) lower than the set point. The cycle continues until relative humidity is less than 60 %.| •  If an electric heater is not installed, the bypass valve’s on time will ex- tend by oper- ating to 1 °F (1°C) lower than set point.|

Humidity Control Enabled – ICM (Off for unity board 1/On for unity board 2) This parameter allows the Humidity Sensor Limit Adjustment to work with the control unity board 2 (ICM).
10.2 Understanding the DX operational settings
This section describes the menu screens and the operational settings available for the DX system.

Selec- tion| Description|

Action

---|---|---
Com- pres- sor Start Delay| Allows compressors to start at different times if more than one system operates from the same power source and the power is interrupted. The de- lay range is 5 s … 135 s.| 1. Tap Main Menu.
2. Tap Control Parameters.
3. Tap Settings Screen (for DX system).
4. Then tap Compressor Start Delay.
NOTE Stage the different unit start times at least five seconds apart.
Fail- safe level| Protects the equipment by triggering a lockout under cer- tain fault conditions. The Smart Touch Cabin Control shuts down and will not restart until the fault is repaired. The lock- out condition depends on a combination of programmed failsafe levels as well as the type of fault detected.| 1. Tap Main Menu.
2. Tap Control Parameters.
3. Tap Settings Screen (for DX system).
4. Then tap Failsafe.
5. To clear the lockout, tap the power button once for Off and tap it again for On.There are four different failsafe levels (only two levels are available for display firmware #A29 and above):
• Faults Not Detected: Provides minimal fail- safe protections and is recommended during initial start up or troubleshooting. Only the air sensor failure fault is detected and displayed.
•  Sometimes during an initial start up or a new unit installation, the refrigerant pressure is be- low the minimum. In this case, the fault should be bypassed until the pressure rises above the minimum requirement. If this failsafe level is se- lected, an automatic timer will revert the sys- tem to full detection after five minutes (the au- tomatic 5 min timer is only for display firmware #A29 and newer. Any older display firmware will not revert to full detection).
• If a fault is detected, the Smart Touch Cabin Control shuts down and will not restart until the fault is repaired. When the fault is repaired, the control restarts after a two-minute delay.
• Faults Detected but Not Displayed:Ap- plies to display firmware #A28 and older. In addition to the failsafe actions of the earlier lev- el, enables all the other fault detections with- out being displayed.
• The Smart Touch Cabin Control shuts down for two minutes or until the fault is cleared, whichever is longer.
•  The Smart Touch Cabin Control restarts when the fault is cleared.
•  Faults Detected and Displayed: Applies to display firmware #A28 and older. In addition to the failsafe actions of the earlier two levels, all faults are displayed.
•  The Smart Touch Cabin Control shuts down for two minutes or until the fault is cleared, whichever is longer.
•  The Smart Touch Cabin Control restarts when the fault is cleared.
• Faults Detected and Displayed with Lock- out: Initiates a lockout after four consecutive highpressure faults, low-pressure faults, or high water temperature in the condenser coil faults.
The Smart Touch Cabin Control shuts down for two minutes or until the fault is cleared, whichever is longer.
Selec- tion| Description|

Action

---|---|---
Low Voltage Moni- tor| Uses the built-in voltmeter circuit to check the AC input volt- age to prevent the compressor from starting if the voltage is less than the setting. When enabled, provides extra pro- tection for the system com- pressor and components dur- ing low voltage (brownout) conditions. Depending on whether the input power sup- ply is100 V  … 120 V  or 208 V  … 240 V , the set- ting can be set to Off (de- fault), 95 V … 120 V for 100 V … 120 V input pow- er, or 195 V … 240 V for 208 V  … 240 V  input power.| 1. Tap Main Menu.
2. Tap Control Parameters.
3. Tap Settings Screen (for DX system).
4.   Then tap Low Voltage Monitor.
•     If a low voltage condition occurs, the fault code low AC voltage appears in the status icon in the main display. The fault will contin- ue until the AC input voltage rises above the selected voltage value, at which time the low AC voltage fault code clears automatically and the cooling or heating cycle will begin. After the compressor starts,the low voltage monitor continues to check the AC input voltage.
•     If the voltage drops and remains below the specified setting for five minutes, the Smart Touch Cabin Control will shut down and the low AC voltage fault will display. The Smart Touch Cabin Control will remain shut down until the voltage rises above the specified set- ting. Once the voltage is restored, the control will restart after the normal fault recovery de- lay.

Selection| Description|

Action

---|---|---
De-Ice Cycle| Prevents ice buildup on the evaporator coil during extended periods of cooling operation. In- stallation variables such as grille sizes, length of ducting, insula- tion, and ambient temperatures decide the run time required to achieve the set point. Fac- tors that substantially increase run time include operating the system with hatches and doors open and programming an un- realistic set point (e.g. 65 °F (18.33 °C). Such situations can cause evaporator ice to form on warm humid days. This monitors the room air temperature in ten- minute intervals during a cooling cycle.| 1. Tap Main Menu.
2. Tap Control Parameters.
3. Tap Settings Screen (for DX sys- tem).
4. Then tap De-Ice Cycle. Depending on the parameter value and the change in room temperature during these monitoring intervals, the control performs actions to prevent ice from forming or to melt ice that has already formed. This is accomplished by short compressor shut- down periods combined with a one-speed in- crease in fan speed and by periodic heat mode cycles with the fan turned off. The parameter setting for de-icing depends on the sensor: the optional inside air temperature sensor or the display built-in temperature sensor.
NOTE Installing an optional in- side air temperature sensor great- ly increases the effectiveness of the de-icing feature, and this op- tion should be considered when- ever the display built-in tempera- ture sensor cannot read the room temperature accurately.
1. If using an optional inside air temper- ature sensor: Set this parameter to en- able with 5 °F (3 °C) sensor differential to turn the de-icing feature On, or set to Off to disable.
2. If using the display built-in tempera- ture sensor: Select one of the following two modes:
a. Option (a): Set to enable with a or 5 °F (3 °C) sensor differential to as- sume the display sensor may read the room temperature as much as or 5 °F (3 °C) greater than the actual evaporator temperature.
b. Option (b): For more extreme in- stallation, set to enable with a or 7 °F (4 °C) sensor differential to assume the display sensor may read the room temperature as much as 7 °F (4 °C) greater than the actual evaporator temperature.
NOTE Only use option (b) if op- tion (a) does not prevent evaporate- tor ice from forming.
NOTE Both modes try to pay for any temperature discrepancy from the display built-in temperature sensor. Although a discrepancy is not typical, installation vari- ables such as where the display is placed inside the room near an open door or in direct sunlight can affect how accurately it reads the actual room temperature.
Selection| Description|

Action

---|---|---
Pump Sentry| Optional temperature sensor that monitors the condenser coil temperature. The sensor is plugged into the “H20 out” sensor plug. When the coil tem- perature rises above the pro- grammed value, the pump and compressor shut down and “Pump Sentry Fault” flashes in the display.| 1.  Tap Main Menu.
2.  Tap Control Parameters.
3. Tap Settings Screen (for DX sys- tem).
4. Then tap Pump Sentry.
5. Connect the water sensor to the con- denser coil outlet and insulate it.
6.  Program the pump sentry setting for a temperature between 100.0 °F …150.0 °F (37.77 °C … 65.55 °C) , depending on the seawater temperature and the system type.
NOTE The setting increments are in °F even when the control is set to display °C.
Pump Operate Mode| Cycles the pump with the com- pressor to increase the pump’s life and to conserve electricity. The pump can be programmed to cycle on and off with the com- pressor, or to operate contin- uously whenever power is ap- plied.| 1.       Tap Main Menu.
2.       Tap Control Parameters.
3.       Tap Settings Screen (for DX sys- tem).
4.       Then tap Pump Operate Mode.
5.       To program the pump for continuous op- eration, set to Continuous.

Selection| Description|

Action

---|---|---
Low Press Detec- tion| When selecting set by jumper, the low- pressure switch will be disabled if the enable LP jumper on the main control board is connected. The low-pressure switch will be enabled if the LP jumper is removed. Choosing disabled (use cau- tion) forces the Smart Touch Cabin Con- trol to ignore the low-pressure switch, treating it as disabled even if the jumper is removed.| 1. Tap Main Menu.

2.  Tap Control Parameters.

3. Tap Settings Screen (for DX system).

4. Then tap Low Press Detec- tion.

| NOTE Choosing disabled (use caution) should only be done when advised by Dometic Customer Ser- vice. As with all faults, a system lockout (sustained shutdown) will occur after the fourth consecutive low- pressure fault.
Selection| Description|

Action

---|---|---
Seawa- ter Temp Low Limit| If the optional sensor is connected to the control board, this feature allows the Smart Touch Cabin Control to switch from reverse-cycle heat to electric heat when the following requirements are met:
• An auxiliary electric heater is in- stalled and enabled.
• The seawater temperature drops below the factory default 40 °F (4.44 °C).
• The reverse-cycle heat has operat- ed more than five minutes.
Once the seawater rises 3 °F (– 16.11 °C) above the seawater low temperature limit, the system returns to reversecycle heating. If an auxiliary heater is not in- stalled, the Smart Touch Cabin Control will shut down and flash “LO” then “SE” by default when the seawater drops be- low 40 °F (4.44 °C). Once the seawater rises 3 °F (– 16.11 °C) above the seawater low temperature limit, the system returns to reverse-cy- cle heating and stops flashing “LO” then “SE”. The range of change is to 35.0 °F … 50 °F (1.66 °C … 10 °C) .| 1.  Tap Main Menu.
2.  Tap Control Parameters.
3. Tap Settings Screen (for DX system).
4. Then tap Seawater Temp Low Limit.
Heat Pump/ Cool- Only| Allows for the heat pump or the cool- only mode operation. Select HP to op- erate in the default heat pump mode, which allows cooling, reverse-cycle heating, and (optional) auxiliary electric heat modes.| 1.   Tap Main Menu.
2.   Tap Control Parameters.
3.   Tap Settings Screen (for DX system).
4.    Then tap Heat Pump/Cool- Only Mode.
5. Select CL for cool-only operation and the unit will operate in cooling or (optional) auxiliary electric heat modes.
NOTE By selecting CL cool-only mode, a five- minute compressor de- lay will start whenever the compressor shuts down because of a set point, a fault, or a power out- age. The five-minute de- lay will begin immediate- ly after the compressor shuts down. The display will show DLY to indicate the system is stabilizing the refrigerant pressures. If the five-minute delay peri- od passes before the com- pressor is called to oper- ate, the compressor will come on with no delay.

10.3 Understanding the CW operational settings
This section describes the menu screens and the operational settings available for the CW system.
Water Temperature Differential

Water Temperature Differential in °F Default is 15 °F (– 9.44 °C)| Valve| Auxiliary Heater
---|---|---
22 °F (– 5.56 °C)| Open| Off
15 °F (– 9.44 °C)| Opens| On
7.0 °F … 15.0 °F (-13.88 °C … -9.44 °C)| Hysteresis| On
7 °F (– 13.89 °C)| Closes| On
7.0 °F … 0.0 °F (-13.88 °C … -17.77 °C)| Close| On
0 °F (– 17.78 °C)| Close| Off
0.0 °F … – 7.0 °F (-17.77 °C … -21.66 °C)| Close| Off
– 7 °F (– 21.67 °C)| Closes| Off
– 7.0 °F … – 15.0 °F (-21.66 °C … -26.11 °C)| Hysteresis| Off
– 15 °F (– 26.11 °C)| Open| Off

For Selection 1 and 2

Selection| Description|

Action

---|---|---
Water Valve Force Open| Opens the water valve to bleed air from the system. The On setting forces the valve open for four hours while the Smart Touch Cabin Con- trol is turned off. If the cool mode is activated or if the AC power to the control’s electric box is interrupted during this four-hour period, this valve override feature is canceled.| 1.    Tap Main Menu.
2.    Tap Control Parameters.
3.    Tap Settings Screen (for CW system).
4.    Then tap Water Valve Force.
5.   Then select On.
6.   To return the valve to normal op- eration at any time, select Off.
Water Temp Differential| Sets the temperature differential between the ambient air tem- perature and the hydronic water temperature that controls the water valve. For example, selecting 10 °F (– 12.22 °C) opens the valve when the water temperature is 10 °F (– 12.22 °C) less than ambient in cooling mode and 10 °F (– 12.22 °C) greater than ambient in the heating mode. Careful selection of the tempera- ture differential can fully use the ship’s heating and cooling re- sources. For example, while in cooling mode and using a 10 degree value, the valve will open to allow some cooling while the hydronic system is coming down to temperature.| 1.  Tap Main Menu.
2.  Tap Control Parameters.
3.  Tap Settings Screen (for CW system).
4.  Then tap Water Temp Differential.
See the table “Water Temperature Differential” for a visual explanation.

10.4 Understanding the memory settings
This section describes the menu screen and the operational settings available for the system memory.

Selection| Description|

Action

---|---|---
3| Reserved for future use| –
Memorize Settings| Allows new settings to be set as the program defaults.| To set new defaults, adjust the parameters to the desired settings:

1.       Tap Main Menu.
2.       Tap Control Parameters.
3.       Tap Memorize Settings.
4.       Tap Save.
5.       To return to the factory default settings, see Recall Factory Default Settings.

Recall Memo- rized Settings| Restores the last memorized de- fault settings.| To restore the last memorized default set- tings:
1.       Tap Main Menu.
2.       Tap Control Parameters.
3.       Tap Recall Memorized Set- tings.
4.       Tap Save.
Recall Factory Default| Allows the installing dealer or end user to change the system’s default parameters. Once the new values are entered and memorized, the factory defaults are overwritten and the new parameters become the default val ues.| To restore the factory defaults manually:
1.       Tap Main Menu.
2.       Tap Control Parameters.
3.       Tap Recall Factory Default Settings.
4.       Tap Save.
NOTE If you have any reason to contact Dometic about the sys- tem or programming the con- trol, you must have both the firmware version number and the control display’s serial num- ber available. The serial number is on the back of the display. To find the firmware version, select menu > system menu > firmware.
NOTE If you have program- ming problems, reset the memorized default settings and try again.

10.4.1 Understanding the backup battery
This section describes the response to a power loss.
Memory
When the Smart Touch Cabin Control loses power, the operating parameters are retained for up to two years. When power is restored, the control resumes operating as last programmed. The Smart Touch Cabin Control has a battery backup. If the battery backup is removed, only the time and date settings will be lost.
Rechargeable battery
The Smart Touch Cabin Control comes with a rechargeable battery. The battery recharges whenever the control is powered, similar to a computer motherboard battery, so there should never be a need to install or replace the backup battery.
When the battery drains due to inactivity, the only information lost is the date and time. In addition, the screen lock PIN will reset to its default (“1234”). All other programming parameters, calibrations, program scheduler settings, etc., remain in flash memory forever and do not require battery power.
When the Smart Touch Cabin Control is plugged into a control that is powered up, the battery will not drain. The Smart Touch Cabin Control battery will drain only when the AC power to the control board is powered off. The battery backup will last over two years of powered-off time or inactivity.
When the battery drains due to inactivity, the only information lost is the date and time. In addition, the screen lock PIN will reset to its default (“1234”). All other programming parameters, calibrations, program scheduler settings, etc., remain in flash memory forever and do not require battery power. If the battery drains, there is no visible sign on the display during a normal power up. Immediately upon a next AC power down and power up, the user will be prompted to set the date and time. This is the sign that the battery drained due to inactivity.
10.5 Understanding the program scheduler
This section describes the menu screen and the operational settings available to start and/or stop the A/C unit at a specific time, day of the week, mode and temperature set point.

Selection| Description|

Action

---|---|---
Scheduler Mode| As soon as the program scheduler is enabled, it will immediately start applying the programs as defined in the various day settings.| 1.   Tap Main Menu.
2.  Tap Program Scheduler.
3.   Tap Schedular Mode.
Program: Mon-Fri| This will start and/or stop the A/C unit at a specific time, from Mon- day to Friday.| 1.   Tap Main Menu.
2.   Tap Program Scheduler.
3.   Tap Program: Mon-Fri.
Program: Sat-Sun| This will start and/or stop the A/C unit at a specific time, on Saturday to Sunday.| 1.   Tap Main Menu.
2.   Tap Program Scheduler.
3.   Tap Program: Sat-Sun.

Selection| Description|

Action

---|---|---
Program: Monday| This will start and/or stop the A/C on Monday.| 1.       Tap Main Menu.

2.       Tap Program Scheduler.

3.       Tap Program: Monday.

Program: Tuesday| This will start and/or stop the A/C on Tuesday.| 1. Tap Main Menu.

2.       Tap Program Scheduler.

3.       Tap Program: Tuesday.

Program: Wednesday

| This will start and/or stop the A/C on Wednesday.| 1.       Tap Main Menu.

2.       Tap Program Scheduler.

3.       Tap Program: Wednesday.

NOTE Each program day has a mode, time, cooling set point, and heating set point (if dual set points are enabled). The mode choices are off, cool, heat, auto, and dehumidify. If dual set points is selected, the cooling set point for cool and auto may be set, and the heating set point for heat and auto may be set. Set points are not available for off or dehumidify.
10.6 Understanding the date/time menu
This section describes the menu screen and the settings available to set the display time, customize its format, and set the optional display on the main screen.
To access date and time submenu screens 1 and 2:

Selection| Description|

Action

---|---|---
Date/Time Dis- play| Choose between On or Off to display the date and time on the main screen.| 1.       Tap Main Menu.
2.       Tap Date/Time Menu. Date/Time screen displays.
3.       Select appropriate Date/Time Dis- play to change.
Date/Time Format| Choose automatic by line fre- quency (60 Hz line frequency results in M/D/Y 12-hour for- mat, or 50 Hz line frequency results in D/M/Y 24-hour for- mat), M/D/Y 12-hour, or D/ M/Y 24-hour.| 1.       Tap Main Menu.
2.       Tap Date/Time Menu. Date/Time screen displays.
3.       Select appropriate Date/Time For- mat to change.
Date/Time Set- tings| Modifies the date and time. Each value is individually ed- itable. The day of the week calculates automatically based upon the date.| 1.       Tap Main Menu.
2.       Tap Date/Time Menu.
3.       Date/Time screen displays.
4.       Select appropriate Date/Time Set- tings to change.

10.7 Understanding the system menu
This section describes the menu screen and the operational settings available to change the display’s screen background, font, icon colors, screen saver configuration, and text editing.

1. Tap Menu.
2. Tap System Menu.
3. Tap Firmware Version.
Display Setup| Display Setup| To adjust the display settings
1. Tap Menu.
2. Tap Display Setup.
3. Tap Display Brightness to choose a display brightness that can easily be read and does not disturb you in low light conditions.
4. Tap Background Color to choose a display color.
5. Tap Icon Text Color to choose a color for button text.
6. Tap Icon Border Color to choose a color for button borders.
7. Tap Data Block & Title Colors to choose a color for screen texts, except button texts.
Sleep Mode Settings| Adjusts the system operations when in sleep mode.| See section “Sleep Mode Setting Submenus” for submenu screens.

Selection| Description|

Action

---|---|---
Display Lock| Adjusts the display locking settings.| See section “Display Lock Submenus” for submenu screens.
Cleaning Mode| Allows time for a screen wipe down for 30 s with the backlight off and the touch panel off. The screen and touch panel automati- cally return in 30 s. The op- eration is not affected dur- ing this time.| To turn off the display for cleaning,
1.  Tap Menu.
2.  Tap System Menu.
3.  Tap Cleaning Mode (30SEC).
4.  Tap the Save icon.

10.7.1 Sleep mode setting submenus
This section describes the sleep mode submenu screens and the settings to customize the sleep operation.

Selection| Description|

Action

---|---|---
Sleep Mode Display| This section describes the sleep mode display set- tings in Sleep Mode Set- tings submenu 1.| 1.   Tap System Menu.
2.  Tap Sleep Mode Settings.
3.  Tap Sleep Mode Display.
4. Select standard logo, custom logo, custom text, or blank screen backlight off or on to show after the sleep mode delay ends.
5.       Tap Save.
Sleep Mode Delay| This section describes the sleep mode delay settings in Sleep Mode Settings submenu 1.| 1.   Tap System Menu.
2.   Tap Sleep Mode Settings.
3.   Tap Sleep Mode Delay.
4.   Select Off, for sleep mode.
5.   Select 0 to 600 seconds of delay to show the sleep mode display.
6.  Tap Save.
Sleep Mode Text Edit| Allows for editing of the display text when the screen is in sleep mode.| 1.       Tap System Menu.
2.       Tap Sleep Mode Settings.
3.       Tap Sleep Mode Text Edit.
4.       Edit the text using arrow icons to select each character.
Character choices are: “ABCDEFGHIJKL MNOPQRSTUVWXYZ0123456789 &’*@:,°=!- ()%.+#?/”.
NOTE The total number of characters that will fit on the screen is a function of the font size, with an absolute maximum of 25.
5.       Tap Save.

Selection|

Action

---|---
Sleep Mode Text Color| 1.       Tap System Menu.
2.       Tap Sleep Mode Settings.
3.       Tap Sleep Mode Text Color. Text Colour Submenu screen appears. 4. Select from 126 different text colors to display during sleep mode.
5.       Tap Save.
Download Cus- tom Logo| This option is only available if the Smart Touch Cabin Control detects that a special programming cable is plugged into its 8-pin jack (i.e. it is not plugged into a control board). Otherwise, the option is grayed out.
There is a PC program called the “Smart Touch Downloader” that enables selection of a 24-bit bitmap file (BMP) and transmission to the Smart Touch Cabin Contr NOTE Instructions for this program are provided separately.

10.7.2 Display lock submenus
This section describes the display lock submenu screens and settings to customize the display’s security access.
For Display Lock Submenu:

Selection| Description|

Action

---|---|---
Set Access Locked by Pin| Sets a security PIN to access the display based on the levels configured.| 1.       Navigate to System Menu screen.
2.       Tap Display Lock Submenu.
3.       Set a security PIN.
4.       Press the icon to enter the config- ured PIN.
Once the PIN is entered, access is avail- able to all levels.
**** NOTE If the system enters sleep mode, the PIN entry will be required again to re- access the same level. The PIN entry will also be required again if this level setting is changed or if the display is AC power cycled.

For Change Pin Submenu:

Selection| Description|

Action

---|---|---
Change Pin| Configures the access PIN.| 1.       Navigate to System Menu screen.
2.       Tap Change Pin.
Change Pin Submenu screen ap- pears.
3.       Enter the current pin first. Factory de- fault is “1234”.
NOTE If the PIN is forgotten, it can be restored to 1234 by powering off the con- trol at the circuit breaker, removing the battery for 60 seconds, reinstalling, and re- powering. This resets the date and time to the factory default and also resets the PIN to 1234. No other parameters or saved entries will be lost.

10.8 Understanding the troubleshooting/commissioning screens
This section describes the menu screens available for troubleshooting and commissioning the system.
See “Troubleshooting” for specific troubleshooting procedures.
See “Commissioning the System” for step by step instructions to commission a unit by testing the main inputs and outputs.
NOTE Steps vary depending on the system (DX or CW). A successful completion will add an entry into the fault history screen.

1. Navigate to Main Menu screen.
2. Select Troubleshoot/Commission.
3. Tap System Status.
System Status screen appears. The screen will vary based on the system in operation (DX or CW).
Help & Information| Describes potential faults.| 1. Navigate to Main Menu.
2. Select Troubleshoot/Commission.
3. Tap Help & Information.
4. Tap Fault Help Lookup.
5. Choose one of the help topics integrated in the software.
• Air Sensor Failure : Indicates an air sensor failure.
• Filter needs to be Cleaned or Replaced : Indicates that the filter needs to be cleaned or replaced.
• Low AC Voltage : Indicates there is low AC voltage.
• High-pressure Fault: Indicates that there is high refrigerant pressure. When in heat mode, it does not display and does not cause a lockout.
• Low-pressure Fault: Indicates there is low refrigerant pressure. It has a three-minute shutdown delay.
• Pump Sentry Fault : Indicates high water temperature in the condensing coil.
• Lost AC Fault : Indicates there is a loss of power.
• Seawater Low Temperature Limit Fault : Indicates the seawater is below 40 °F (4.44 °C).
6. Repeat steps 1 to 3.
7. Tap Link For More Help.
QR code screen appears.http://qr.dometic.com/besUJL
8. Scan the QR code to open the Smart Touch Cabin Control website for help. The fault descriptions match the live fault help on the main screen when the hidden icon over the status text window is pressed.
Commission Procedure| This section outlines the commissioning procedure to test the main inputs and outputs of a new system. The procedure also offers guidance when selecting important system settings.
NOTE  The commissioning procedure varies depending on the CW or DX system.| 1. Navigate to Main Menu.
2. Select Troubleshoot/Commission. Troubleshoot/Commision screen appears.
3. Tap Commission Procedure.
4. See “Commissioning the System”.

10.9 Understanding the fault handling, history & run hours
This section describes the fault and run histories.
NOTE To protect the equipment, certain fault conditions trigger a lockout.
The control shuts down and will not restart until the fault is repaired.

Selection| Description|

Action

---|---|---
Fault History| Displays the his- tory of previously cleared faults and the current active faults.| 1.       Navigate to Main Menu.
2.       Select Fault History & Run Hours. Faults and Hours screen appears.
3.       Tap Fault History. Faults Detail screen appears. 4.       Press the CLR icon to clear the visible fault history, compressor run hours, and fan run hours.
5.       Press and hold the CLR icon for ten seconds to view the lifetime fault history and run hours, or cleared faults.
NOTE When used with the optional auxiliary heat sensor, the fan remains on for four minutes after the heater cycles off even if the fan is set to cycled operation.
Compres- sor Run Hours| Displays the num- ber of compressor run hours.| 1. Navigate to Main Menu.
2.       Select Fault History & Run Hours.Faults and Hours screen appears.
3.       Tap Compressor Run Hours. Compressor Run Hours screen appears. 4. Press the CLR icon to clear.
Selection| Description|

Action

---|---|---
Fan Run Hours| Displays the cur- rent number of fan hours.| 1.       Navigate to Main Menu.
2.       Select Fault History & Run Hours. Faults and Hours screen appears.
3.       Tap Fan Run Hours. Fan Run Hours screen appears.4.       Press the CLR icon to clear.

10.9.1 Navigation trees
This section provides a visual representation to navigate the system options.
10.9.2 Main menu navigation

10.9.3 Control parameters navigation

10.9.4 System settings navigation

Maintenance

WARNING! ACID HAZARD. Failure to obey the following warnings could result in death or serious injury.

• Follow all warnings and recommendations given by the manufacturer of any acids or premixed solutions.
• Dispose of any contaminated acid solutions in accordance with federal, state and/or local regulations.
• Avoid spilling or splashing any antifreeze solution.

Monthly

Monthly

Task|

Section

Check the return-air fil- ter.| Checking the Return-Air Filter on page 30
Energize the reverse-cy- cle units.| Energizing the Reversing Valve Units DX Only on page 30

Periodically – DX Only

Task

|

Section

Check the seawater strainer function.| Checking the Seawater Strainer – DX Only on page 30
Clean the condenser coil.| Cleaning the Condenser Coil – DX Only on page 30

Winterizing – DX Only

Task

|

Section

Circulate antifreeze in the system.| Winterizing the System – DX Only on page 30

11.1 Checking the Return-Air Filter
Check the return-air filter about once a month and clean as necessary.
To clean the filter:

1. Remove the filter from the unit and rinse with water.
2. Air dry the filter and reinstall.

11.2 Energizing the Reversing Valve Units DX Only

1. Energize the reverse-cycle (cooling and heating) units to keep the internal parts moving freely.
2. To energize the reversing valve, switch the air conditioner to heat mode for a few seconds very month.

11.3 Checking the Seawater Strainer – DX Only Ensure the pump receives adequate seawater flow. To maintain proper flow:

1. Regularly clean the strainer basket.
2. Periodically check the overboard discharge for a steady stream of water.
3. See the seawater intake speed scoop for blockage.
4. Ensure the hoses are not looped, kinked, or crushed.

11.4 Cleaning the Condenser Coil – DX Only
To avoid a marine-growth-fouled coil which reduces efficiency by raising the total system pressure and decreasing its ability to produce cold air:

1. Turn off the circuit breaker on the ship’s panel, and disconnect the inlet and outlet connections of the condenser coil.
2. Use chemical-resistant hoses [white PVC 0.63 in (16 mm) I.D., etc.] to connect the inlet of the condenser coil to the outlet of a chemical resistant, submersible pump (P-500 pump, etc.). Let the hose connected to the coil outlet flow freely into the container mentioned below.
3. Place a strainer or piece of screen over the inlet of the pump and submerse the pump into a container filled with fresh water or with a premixed over-the-counter solution. Use as large a container as possible to hold 5 gal … 25 gal 19 L … 95 Lof solution.
4. Power the pump and circulate the solution through the condenser coil for 15 min … 45 min depending on the size of the coils and the extent of the contamination. Visually inspect the solution in the container to decide when the contamination removal has stopped.
5. Circulate fresh water through the coil to flush any residual cleaner from the system.
6. Restart the system. Check the operational parameters to ensure thorough cleaning. Additional cleaning may be necessary with extreme contamination.

11.5 Winterizing the System – DX Only
Any winterization method that causes the antifreeze solution to flow downward is the method of choice. By this means, the antifreeze solution displaces any trapped water and eliminates the possibility of it freezing in hidden areas.
Choose one of the methods below. The first two methods use a 50/50 nonpolluting biodegradable antifreeze/water solution:

1. Pump the antifreeze solution into the overboard thruhull fitting, and discharge through the intake thru-hull fitting.

2. Use the seawater pump to pump the antifreeze solution through the system and discharge through the overboard thru-hull fitting:
   a) Close the seacock.
   b) Remove the hose from the strainer discharge.
   c) Raise the hose above the pump (so the pump does not lose its prime) and pour in the antifreeze solution.
   d) Pump the solution through the system.
   e) Drain the water from the strainer and the hose to the seacock.

3. Inject pressurized air at the overboard discharge fitting to force any system water through the seawater intake fitting, and expel any trapped water from the system.

Troubleshooting

WARNING! ELECTRICAL SHOCK HAZARD. Failure to obey the following warnings could result in death or serious injury:

• Exercise extreme care when working around energized equipment.
• Maintenance and repair should be performed only by qualified technicians.

Turn on the air conditioner circuit breaker at the ship’s panel.
The display is not turned on.| Turn on the display.
The terminal strip is mis- wired.| Check the wiring diagram and correct if necessary.
The input-line voltage is in- sufficient.| •     Check the power source (shore/gen- erator) for proper voltage.
•     Check the wiring and terminals for proper sizes and connections.
•     Verify with a voltmeter that the power at the unit is the same as the power source.
An electrical part has failed.| A technician should inspect the display, ca- ble, and circuit board. Look for a red light on the circuit board.
The system runs continuously.| The unit is not able to reach the set point.
The seawater temperature is too high for cooling or too low for heating. The optional inside air temperature sensor is not located properly.
The de-icing feature is not enabled.| Close all the port holes and hatches. Adjust the set point so it is not too low for cooling or too high for heating.
Seawater temperature will directly affect the air conditioner’s efficiency. This air conditioner can effectively cool your boat in water temperatures up to 90 °F (32.22 °C) and heat (if reverse-cycle option is installed) in water As low as 40 °F (4.44 °C).
• Verify the display location with the criteria found in the installation section of this manual.
• Install an optional inside air temperature sensor if necessary. If an optional inside air temperature sensor is already installed in the air stream, ensure it does not touch anything warm (like the condenser coil). Enable de- icing in the parameters. If ice still forms immediately, revisit the above possible causes
NOTE  Ice on a fan coil can be removed quickly by running the unit in HEAT mode.
There is a lack of airflow.| The airflow is blocked or restricted.
The fan speed is set to manual low.
The fan coil may be iced.| Remove any obstructions in the return-air stream.
• Clean the return-air filter and grille.Check for crushed or restricted ducting.
• Ducting must be as straight, smooth, and taut as possible.
Refer to “The fan coil is iced.” in this table.
The fan coil is iced.| The humidity level is set too high.
The supply air is short-cycling.
The airflow is blocked or re- stricted
The fan runs too slow.
The system runs continuously.| Close the hatches and doors.
• Redirect the supply air so that is not blowing in or near the return-air stream.
• Seal any air leaks on the duct.  Refer to “There is a lack of airflow.” in this table. Set the fan speed to automatic mode or increase the manual fan speed. Or, increase the minimum low speed in the program parameters. Close hatches and doors, raise set point, turn on de-icing.
The condenser coil is iced while in HEAT mode.| The seawater temperature is below 40 °F(4 °C).| • Shut down the system to prevent damage to the condenser.
• Allow the coil to defrost.
The fan does not run or runs continuously.| The digital control is set for either fan cycling with compressor or for continuous fan operation. The circuit board on the unit is defective. Typically, the compressor and pump are still running.| Change the fan operation to continuous fan operation or fan cycling with compressor.
NOTE  When configured for auxiliary electric heat, the fan will stay on for four minutes after a heat cycle ends even If the fan is set to cycled operation. Call for service to replace the board.
NOTE  A shorted relay or triacmay cause the fan to never shut off or never turn on. If  the fan never shuts off, the Fan may be set to ‘continuous’ on the display.
The unit does not

heat.

| The unit does not have a heating cycle.
The display is set to coolonly or auxiliary electric heat.
The reversing valve is stuck.
The seawater temperature is too low.
There is a loss of refrigerant gas.
(For CW systems only) The chilled-water loop is inadequately heated, the chiller system is not in the proper mode of operation, or the auxiliary electric
Heater is disabled.| • Be sure the chiller is in HEAT mode.
• If the air handler system is equipped with water-temperature sensors, check the water temperature at the digital control.
• If the water temperature is not at least 15 °F warmer for HEAT mode, the water valve will not open.
• If the air handler system is equipped with an auxiliary electric heater, ensure that the auxiliary electric heat is enabled.
The unit does not cool.| The display is set to heatonly.
The seawater temperature is too high.
There is a loss of refrigerant gas.
For CW systems only) The chilled-water loop is inadequately cooled or the chiller system is not in the proper mode of operation.| Change the parameters on the display or press the MODE button to activate cool or automatic mode.
Seawater temperature will directly affect the air conditioner’s efficiency. This air conditioner can effectively cool your boat in water temperatures up to 90 °F (32.22 °C).
The unit may still work at higher water temperatures, but not as efficiently.
• Check the air conditioner for a refrigerant oil leak.
• Call for service.
• Be sure the chiller is in COOL mode.
• If the air handler system is equipped with water-temperature sensors, check the water temperature at the digital control.
• If the water temperature is not at least 15 °F cooler for COOL mode, the water valve will not open.
The unit switches to heat while in COOL mode.| The de-icing feature is enabled due to the coil possibly icing up during long run times.| Reprogram the de- icing cycle under the parameter settings.
The pump does not shut off.| The circuit board is shorted. The pump parameter on the display is set for the pump to run continuously.| • Call service to verify if a relay on the circuit board is shorted or if the pump relay board is defective, if applicable.

• Replace any board that is shorted. Change the parameter on the display so the pump cycles with the compressor.

The pump does not run.| A high-pressure fault may be present.| Refer to “A high pressure fault is present.” In this table.
The compressor does not shut off.| A relay on the circuit board has a short circuit.| Call service to verify and replace the board.
Problem| Possible Causes| Recommended Solution
---|---|---
The compressor does not run.| A relay on the circuit board has an open circuit.| Call service to verify and replace the board.
There is an open overload on the compressor.| •     Call service to verify and repair.
•     If the overload on the compressor is internal, wait several hours for it to cool before testing.
A low-pressure fault is present.| The unit does not have a low-pressure switch, but the JP2 jumper on the cir- cuit board has been re- moved or a parameter, if applicable, has been en- abled on the display.| •     If the unit does not have a low-pres- sure switch, ensure the JP2 jumper on the board is in place over both pins.
•     Disable the parameter, if applicable.
The low-pressure switch is open due to low seawater and/or low return-air tem- peratures.| Try to restart the air conditioner. The op- tional low-pressure switch has a ten-minute shutdown time delay that may be in effect.
The low-pressure switch is open due to a loss of refrig- erant.| •     Check the air conditioner for a refrig- erant oil leak.
•     Call for service.
The low-pressure switch is defective or a wire is loose.| •     Contact a servicing dealer to test the low-pressure switch and to ensure the wires are properly connected and seated in the orange plug on the cir- cuit board.
•     Ensure the orange plug is not in- stalled backwards on the circuit board.
A high pressure fault is present.| The seawater flow is ob- structed. The condenser coil may be too hot to touch.| •     Water should be flowing strongly out of the overflow. Be sure the seacock is open and water is flowing to the pump.
•     Clean the seawater strainer.
•     Check for obstructions at the speed scoop thru-hull inlet.
•     Check for a strong, steady flow from the overboard discharge.
The high-pressure switch is open (in heating) due to improper airflow.| • Remove any obstructions in the re- turn-air stream.
•     Clean the air filter and grille.
•     Check for crushed or restricted duct- ing. The ducting must be as straight, smooth, and as taut as possible.
•     If the problem persists, reprogram the low fan speed limit for maximum value.
•     Set the low fan limit to 75, and set the reverse fan speeds during HEAT mode by changing the reverse fan speed in Heat under general settings or manually set the fan speed to high.
The high-pressure switch is open (in heating) due to a high seawater temperature.| The system may cycle on high-pressure if the seawater temperature is above 55 °F (12.78 °C).
The high-pressure switch is defective or a wire is loose.| •     Contact a servicing dealer to test the high-pressure switch and to ensure the wires are properly connected and seated in the orange plug on the cir- cuit board.
•     Ensure the orange plug is not in- stalled backwards on the circuit board.
The seawater pump may be air-locked.| •     Ensure that the seawater plumbing is installed according to the guide-
lines in the Installation Manual includ- ed with the air conditioner.
•     Remove the hose from the pump dis- charge port to purge air from the line.

Problem

| Possible Causes|

Recommended Solution

---|---|---
| The seawater pump is not running.| •     Water should be strongly flowing out of the overflow .
•     Ensure the pump is not damaged from being run dry.
•     Check if the pump is receiving volt- age.
•     Check the pump circuit breaker or the relay board, if applicable.
A low-AC voltage fault is present.| The supply voltage is too low.| Use a multimeter to verify that constant, steady power is available to the unit.
The voltage is improperly calibrated, if applicable.| •     Use a multimeter to verify that the voltage reading to the unit matches the voltage calibration in the parame- ters.
•     Adjust the voltage calibration if nec- essary.
The air conditioner does not respond to the changes en- tered on the dis- play.| The display is experienc- ing a power interruption, voltage frequency fluctua- tion electromagnetic inter- ference from other equip- ment, or similar power-re- lated issue.| Perform a factory reset of the display:
1.       Turn the power off.
2.       Disconnect the cable from the dis- play.
3.       Turn the power on, wait 20 s, and turn the power off.
4.       Reconnect the cable to the display.
5.       Turn the power on. NOTE This will cause all the parameters to reset to the factory default set- tings.
The circuit board is recog- nizing previously connect- ed displays.
The display-cable plugs are not making contact (for ex- ample, the plugs are un- plugged, dirty, bent, or have broken pins). The dis- play may show ‘999’ or

‘ — ‘ if unable to commu- nicate with the unit.

| •     With the power off at the circuit breaker, remove the connector and inspect it.
•     Clean the socket and the cable with electrical contact cleaner.
•     Work the cable in and out of the sock- et. If damaged, replace the connec- tor or the display cable.
The display buttons do not function.| The display is locked. Unlock the display.
The display and the circuit board are not compatible.| •     Ensure the compatibility between the circuit board and the display. Some older boards will not work with newer displays and some newer boards will not work with older displays.
•     If the rebooted circuit board and dis- play unit continue to act oddly, re- place the display cable.
The display does not show the cor- rect room temper- ature.| The display is showing a code for a faulty air sensor, typically because there is a failed: display built-in tem- perature sensor, optional inside air temperature sen- sor, or display cable.| •     Replace the optional inside air tem- perature sensor.
•     If using the display built-in temper- ature sensor, replace the display or add an optional inside air tempera- ture sensor.
•     Install a different display cable.
•     Ensure that the damaged jack/socket in the display head or on the circuit board is not damaged.
The temperature displayed is too high.| •     If the temperature displayed is with- in 50 °F (10 °C) above the actual tem- perature, use calibration parameter 4 to adjust.
•     If the temperature displayed is hotter than 50 °F (10 °C) above the actual temperature, adjust the JP5 jumper on the unit’s circuit board.• Refer to the “Note if using an optional inside air temperature sensor”.
Problem| Possible Causes|

Recommended Solution

---|---|---
| The temperature displayed is too low.| •     If the temperature displayed is within 50 °F (10 °C) below the actual tem- perature, use calibration parameter 4 to adjust.
•     If the temperature displayed is colder than 50 °F (10 °C) below the actual temperature, adjust the JP5 jumper on the unit’s circuit board.
•     Refer to the “Note if using an optional inside air temperature sensor”.
The temperature adjusts too quickly or still does not read correctly.| Relocate the display or the optional in- side air temperature sensor. The supply air should not blow on or near a sensor. Locate the optional inside air temperature sensor in the return air stream, and ensure it is not physically touching any part of the unit.
NOTE Note if using an op- tional inside air temperature sensor, it will be either an RJ11 4-pin 3,000 K sensor or an RJ12 6-pin 10,000 K sensor. If the 6-pin sensor is installed, the JP5 jumper must be re- moved from the board. If nei- ther sensor is installed on the circuit board, the display reads from its own built-in sensor, if applicable.
A low pump-flow fault is present, if applicable.| The condenser coil is too hot.| Verify the unit receives water flow and the condenser is not fouled.
The thermistor is damaged.| •     Unplug the water sensor if installed.
•     Install another thermistor if one is available.
There is a damaged jack/ socket on the circuit board.| Visually check to verify the pins inside the socket are not bent or corroded. Repair or replace the circuit board if needed.
A filter reminder is presented.| The timer setting to clean or replace the filter has been reached.| Clean or replace the filter and reset the filter hours.

Disposal

Place the packaging material in the appropriate recycling waste bins, wherever possible. Consult a local recycling center or specialist dealer for details about how to dispose of the product in accordance with the applicable disposal regulations.

Warranty

LIMITED WARRANTY AVAILABLE ATDOMETIC.COM/WARRANTY.
IF YOU HAVE QUESTIONS, OR TO OBTAIN A COPY OF THE LIMITED WARRANTY FREE OF CHARGE, CONTACT:
DOMETIC CORPORATION
MARINE CUSTOMER SUPPORT CENTER 2000 NORTH ANDREWS AVENUE
POMPANO BEACH, FLORIDA, USA 33069 1-800-542-2477

dometic.com
YOUR LOCAL DEALER
dometic.com/dealer
YOUR LOCAL SUPPORT
dometic.com/contact
YOUR LOCAL SALES OFFICE
dometic.com/sales-offices
A complete list of Dometic companies, which comprise the Dometic Group, can be found in the public filings of:
DOMETIC GROUP AB
Hemvarnsgatan 15 • SE-17154 Solna • Sweden

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