Webasto 28V Cool Top Trail Air Conditioner Roof Top Unit Instruction Manual

: September 25, 2024
: Webasto

Table of Contents

Webasto 28V Cool Top Trail Air Conditioner Roof Top Unit
Product Information
Product Usage Instructions
FAQ
Introduction
Safety
Scope of delivery
Installation instructions
Operating Instructions
Maintenance
Troubleshooting
Disposal
Declarations of conformity
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Webasto 28V Cool Top Trail Air Conditioner Roof Top Unit

Product Information

Specifications

Product Name: Cool Top Trail 28V Air Conditioner Roof Top Unit
Manufacturer: Webasto
Website: https://www.caravansplus.com.au

Product Usage Instructions

Introduction

These operating and installation instructions are essential for correct and safe installation and use of the Cool Top Trail 28V Air Conditioner Roof Top Unit. Please read these instructions carefully before proceeding.

Safety

Intended use: The unit is intended for specific purposes. Ensure proper usage as described in the manual.
Safety information: Follow all safety guidelines provided to prevent accidents or injuries.
Qualifications of personnel: Only qualified personnel should handle installation and maintenance tasks.

Scope of Delivery

The package should contain all necessary components for installation. Verify the contents before starting the installation process.

Installation Instructions

Follow the step-by-step installation guide provided in the manual to ensure proper setup of the air conditioner unit.

Operating Instructions

Refer to the operating instructions section for guidance on how to use the air conditioner effectively.

Maintenance

Regular maintenance is crucial for optimal performance.
Follow the maintenance tasks outlined in the manual, including cleaning air filters, checking bolts, and cleaning heat exchangers.

FAQ

Q: What should I do if I encounter a problem with the unit?
- A: Refer to the troubleshooting section in the manual for guidance on identifying and resolving common issues. If problems persist, contact a Webasto service partner for assistance.

Introduction

These operating – and installation instructions are part of the product and contain all the information required to ensure correct and safe installation and use. u Read these instructions before installing and operating the
unit. u Keep these instructions ready to hand. u Hand these instructions on to the following owner or user
of the unit.
1.1 Use of symbols and highlighting
DANGER This signal word denotes a hazard with a high degree of risk which, if not avoided, may lead to death or serious injury.
WARNING This signal word denotes a hazard with a moderate degree of risk which, if not avoided, may lead to minor or moderate injury.
CAUTION This signal word denotes a hazard with a low degree of risk which, if not avoided, may lead to minor or moderate injury.
NOTE This symbol denotes a special technical feature or (if not observed) potential damage to the product.
This symbol refers to separate documents which may be enclosed or can be requested from Webasto.
ü Requirements for the following necessary action u Necessary action
1.2 Warranty and liability
The statutory warranty period applies. If the product is defective, please contact a Webasto service partner in your country. You can find your nearest dealer at: https://dealerlocator.webasto.com/en-int Our experts will be happy to help you and will discuss the warranty process with you in more detail. Webasto shall not assume liability for defects or damages that are the result of disregarding the installation and operating instructions. This liability exclusion particularly applies to:
l Installation by untrained personnel. l Improper use. l Repairs not carried out by a Webasto service workshop. l Use of non-genuine parts. l Conversion of the unit without permission from Webasto. l Mechanical damage to the equipment. l Non-compliance with installation and operating.

Damage resulting from improper transport.

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Safety

2 Safety
2.1 Intended use
The Cool Top Trail 28V is designed for installation in caravans or motorhomes and vehicles with living compartments.
The Cool Top Trail 28V: l is not suitable for installation in construction machines, agricultural machines or similar equipment. l is not intended to be used in boats or to be exposed to strong vibrations. l is not suitable for houses or apartments. l may not be operated in vehicles while driving.
2.2 Safety information
DANGER
Danger of electrocution u Always switch off the mains power and disconnect
the mains before working on the system. u Make sure that the vehicle’s external mains power
supply socket is effectively grounded in accordance with the local regulations. – Failure to ground the unit correctly may cause electric shock or fire. u Test the air conditioner for leakage current after installation. u Immediately turn off the air conditioner and isolate power supply if you detect any unusual odour, smoke or fire. u The T 5A 250 V fuse for the air conditioner is located on the electronic control unit. Only replace this with an identical fuse.
DANGER
Danger of injury or death u Do not use the air conditioner near flammable fluids
or in closed rooms. u Make sure that no combustible objects are stored or
installed near the air outlet. Keep a clearance of at least 50 cm. u Do not reach into the air openings or insert any foreign objects into the air conditioner. Do not operate the air conditioner without its cover. u Do not remove or open the upper cover of the air conditioner in the event of a fire. Use appropriate extinguishing agents instead. Never use water to extinguish fires. u The air conditioner must be installed securely so that it remains attached to the roof. u Always wear protective clothing during installation, such as goggles and gloves. u Check whether the vehicle roof is able to support the weight of the installer as well as the air conditioner before climbing onto it.

CAUTION u There may be wires above the ceiling. When cutting
into the roof, you must isolate the power to the prevent risk of electric shock. u Do not spray paint or insecticide on the air conditioner surface. u If the unit is equipped with lights, only connect the LED lights to the DC power lead provided by the air conditioner. Connection to any other power source may damage the LED lights. u Electrical devices are not toys. Keep electrical appliances out of reach of children or the infirm. Persons whose physical, sensory or mental capabilities are impaired, or whose lack of experience and knowledge prevents them from using the device safely, should not use the device without supervision or instruction by a responsible person. u Never drive through automatic car washes with a roof air conditioner installed. u If faults occur in the air conditioner’s refrigerant circuit, the device must be checked by a specialist company and properly repaired. The refrigerant must never be released into the air.
NOTE u Keep the air inlet and outlet of the indoor and out-
door units of the air conditioner clear. u Isolate the power supply if you do not use the air-
conditioner for a long time. u Install the air conditioner in compliance with the in-
structions in this manual. Incorrect installation methods or alteration of the product may cause damage to the product or personal injuries to the user. u Clean the filter of the air conditioner regularly. u A dirty filter decreases the air flow and leads to poor heating and cooling performance. u Ask the vehicle manufacturer if a technical inspection is required after fitting the air conditioner and whether the height of the vehicle entered in the vehicle documents needs to be updated. u Switch off the air conditioner via the mains only in case of danger. u Contact after-sales service personnel in case of unit faults.
2.3 Qualifications of personnel
Installation and maintenance personnel must: l Have corresponding qualifications for working on technical / electrical systems. l Be certified to work on refrigeration conditioning systems. l Hold current licenses for the work described in this document.

Scope of delivery

3 Scope of delivery
The system will be delivered in 2 packages. Please check the delivery for completeness and damage.

Fig. 1 Outdoor unit
Pos. Description 1 Outdoor unit 2 Air inlet duct 3 Operating- and Installation instructions 4 Template for the outdoor unit

Quantity 1 1 1 1

1
2
3
4 5 6 7 8 9 10
11

Fig. 2 Indoor unit

Pos. Description 1 Adaptor frame 2 Air distributor mounting bracket

Quantity 1 1

Pos. Description
3 Air distributor (LED lights optional)
4 Return air filter
5 M8 x 120 mm hex head bolt
6 Metal clamping bar
7 Large M8 washer
8 Air distributor pan head screw ST4.219
9 Countersunk head self-tapping screw ST4.216-C
10 Remote control with holder and batteries (2 x size AAA)
11 Template for the indoor unit

Quantity 1
1 4 4 4 4
10
1
1

4 Installation instructions

4.1 General
l Thoroughly read and understand this manual before installation.
l Do not add any other parts or modify the product in the installation.
l Consult Webasto or the local distributor in case of unusual applications or installation conditions that are not specifically covered by this manual.
WARNING If a heater exhaust pipe is mounted through the roof nearby the A/C unit, then the exhaust pipe must be extended 10 cm above the A/C unit.
4.2 Installation requirements
l The vehicle roof must be able to support the weight of the air conditioner.
l The minimum thickness of roof is 25 mm; the maximum thickness of roof is 70 mm.
l The roof must be level and smooth.
4.3 Different cut-out sizes
The installation is possible for different cut-out sizes.

To install a 400 x 400 mm roof hatch:
1. Dismount the roof hatch and use the remaining cut-out.
2. Remove sealant residue and unevenness.
3. Fill in the screw holes with flexible non-hardening butyl body sealant.
4. The adapter frame for 400 x 400 mm cut-outs is part of the scope of delivery.
To install a 360 x 360 mm roof hatch:
1. Dismount the roof hatch and use the remaining cut-out. Either you have purchased a unit with a 360 x 360 adapter or you must buy the optional adaptor frame for such cutouts. You can use it instead of the 400 x 400 mm adaptor frame.
2. Remove sealant residue and unevenness.
3. Fill in screw holes with flexible non-hardening butyl body sealant.

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4 | Installation instructions
To create a new cut-out: Depending on the size of the adapter frame you need to create the corresponding cut-out in the roof. Consult the vehicle manufacturer for the most suitable way and position for a new cut-out.
4.4 Installation position

NOTE All measurements are in mm, unless stated otherwise.
1

2 3

Fig. 3 Installation direction of the outdoor unit
Consider the installation position before installation: l The intended location must not interfere with existing structures and cables. l The air conditioner must be installed as close as possible to the centre of the roof. l The installation position of the outdoor unit must be consistent with the traveling direction (F) of the vehicle. l Make sure that there is sufficient room on the inside of the vehicle to install the air distributor. l Consider the installation position of the air distributor and make sure its outlets are at least 400 mm away from cupboards, walls and bulkheads which could redirect conditioned air back towards the return air intake. If an outlet is less than 400 mm from an obstruction, then it should be sealed closed. Failure to do so will result in a unit that frequently cycles on and off. l The cut-out must avoid roof cladding joints where possible. l Choose an installation position between two longitudinal supports or sections, if present. l There must be a minimum of 100 mm clearance all around the rooftop unit to ensure suitable air flow and access for maintenance.
WARNING
When a hatch with safety ventilation function is replaced by the air conditioner, you must make sure that the safety ventilation is restored in another location.
NOTE
The angle of inclination of the air conditioner must not be greater than 5° (= 8.8%) and the rear of the air conditioner must not be higher than the front.
The following illustrations (Fig. 4, Fig. 5 and Fig. 6) show the required installation space for the outdoor unit and the air distributor on the inside for the two different cut-out versions. Centre the air distributor by using the cut-out.

Fig. 4 Installation measurements (top / bottom view)
1 Position of the outdoor unit 2 Position of the air distributor 3 Square cut- out F Direction of travel
Fig. 5 Installation measurements (side view)
Fig. 6 Installation measurements (front view)
4.5 Roof reinforcements
You must reinforce the cut-out with a wooden frame, using bars which are at least 20 mm wide. You may have to remove insulation material first however. The reinforcement frame is to make sure that the roof is not crushed by the installation bolts and that air-conditioned air does not enter the ceiling space.
Fig. 7 Roof reinforcement
1 Roof

Installation instructions

2 Wooden bars
Fig. 8 Cut-out with wooden reinforcement
1 Cut-out 2 Insulation in roof 3 Wooden bars
4.6 Power supply
WARNING Danger of electrocution You must make sure that there is no voltage at electrically operated components before working on them. Make sure that the mains power supply or the power supplied by inverters is isolated. NOTE Only qualified electricians must make the 230 V electrical connection (in Germany for example, in accordance with VDE 0100, Part 721 or IEC 60364-7-721). When connecting to the mains supply front, it is the installer’s responsibility to make sure that local wiring regulations are followed.

10. Do not lay 230 V cables and 12/24 V cables together in the same cable duct.
11. Do not lay loose or bent cables next to electrically conductive material (metal).
4.7 Adaptor frame installation
1. Make sure the roof is clean, dry and free from oil or grease. 2. Insert the adapter frame into the cut-out to make sure that
the power supply cable and the CI-BUS cable (if applicable) do not interfere with the frame. If the cables cause obstructions, then cut or drill openings in the bottom of the frame to lead the cables through. 3. Confirm the correct orientation of the frame by using the “This side up” label.
Fig. 10 Orientation of the adaptor frame
4. Turn the part over and on the reverse side of “This side up”, apply silicone sealant uniformly over the path shown.

Fig. 9 Electrical power supply cable
1. Make sure that the 230 V power supply is connected to a residual current device.
2. Install a circuit breaker with a contact clearance of at least 3.5 mm and an all-pole insulation to protect the power supply cable to the A/C unit and to allow maintenance and repair work on the unit.
3. Provide a 230 V~ power supply cable to the cut-out.
4. Optionally lead the power supply cable through the roof insulation as shown above.
5. Drill a hole in the wooden bar through which to route the power supply cable.
6. Route the power supply cable through the hole in the wooden bar before mounting the bar.
7. Attach and lay the cables so that they cannot be tripped over or damaged.
8. Use cable ducts to route cables through walls with sharp edges.
9. Make sure that the minimum cross sections of the cable corresponding to the current draw of the unit.

Fig. 11 Sealant paths
5. Turn the part over again and make sure “This side up” is up. Press down firmly over the installation hole and remove any sealant that has squeezed out.
Fig. 12 Forming an effective seal
4.8 Installing the outdoor unit
Place the outdoor unit over the installed adaptor frame, and adjust the position to make sure that the four bolt holes on the corners are properly aligned.
NOTE The outdoor unit is heavy. Always have a second person to help carrying the unit. Do not lift the outdoor unit by the upper white cover. Lift it by the bottom base.

4 | Installation instructions

Using the M8 bolts, verify that the holes of the outdoor unit are aligned with the holes of the adaptor. If they are not, then reposition the outdoor unit accordingly.
Do not apply additional sealant between the outdoor unit and the adaptor frame.

4. Screw the bolts into their receiving threads by hand to ensure proper engagement.
5. Make sure that all bolts are screwed in correctly. Minimally apply 2 rotations to avoid cross threading.
6. Make sure that the metal clamping bars align with the corresponding recess in the air distributor’s mounting bracket while you tighten the bolts.
7. Finally, tighten up all four bolts evenly to 7 Nm torque.

Fig. 13 Positioning the outdoor unit
4.9 Connecting the power supply
1. Look upward from inside the vehicle, and locate the terminal blocks (1).
2. Release the orange levers.
3. Strip the wires to a length of 10 mm (for WAGO 222-412).
4. Insert the wires of the power supply cable into the 2-pole terminal blocks. Match the corresponding active, neutral, and the ground wires.
5. Close the orange levers to make sure that the power lead is secure and properly connected. Failure to do so may cause a short circuit or fire.

Fig. 15 Installing the bolts
4.11 Connecting the air-inlet duct
1. Hold the free end of the air inlet (2) duct and pull it down until it touches the air distributor mounting bracket (1).
2. Continue to pull the rim of the duct down until it engages with the four latches (3) on the air distributor’s mounting bracket.
3. You will know that the duct is correctly connected when you hear distinct clicking sounds of the four latches, and when the rim of the duct is parallel to the surface of the bracket.

Fig. 14 Location of the terminal blocks
NOTE Failure to secure the connections properly may result in a short circuit or a fire.
4.10 Installing the air distributor mounting bracket
1. Prepare the M8 bolts (4), washers (3) and fixing metal clamping bars (2) as illustrated.
2. Lift the air distributor mounting bracket (1) towards the air conditioner.
3. Insert the M8 bolts, with its washers, and metal clamping bars into the 4 corner holes of the air distributor’s mounting bracket.

Fig. 16 Connecting the air-inlet duct
4.12 Installing the air distributor assembly
The following mounting procedure applies both to air distributor versions with and without LED lights.
1. Remove the air filter from the air distributor by pushing both tabs (1) inwards (2) and then downwards (3).

Installation instructions | 4
To install these screws: 5. Remove the screw caps (3) from around the perimeter of
the air distributor (1). 6. Attach the air distributor (1) to the ceiling using 8 counter-
sunk head screws (2). 7. Re-mount the screw caps on the air distributor.

Fig. 17 Removing the air filter
2. Connect the socket and plug of the air distributor wires and outdoor unit. The colours of the wires match: yellow to yellow, red to red, and so on.

Fig. 18 Connecting air distributor – and outdoor unit cables
3. Attach the air distributor (1) to the air distributor mounting bracket by engaging the two parts. You will hear four clicks of the latches (2) when the air distributor (1) and the mounting bracket connect together.

Fig. 21 Fixing the air distributor to the ceiling
Install the air filter (3) as illustrated below:
8. Insert the lips of the filter into the slots (1).
9. Move the filter upwards and make sure the tabs engage (2).

Fig. 19 Attaching the air distributor assembly to the mounting bracket
4. Fix the air distributor (1) on the air distributor mounting bracket with four ST4.2 * 19 pan head screws (2).

Fig. 22 Installing the air filter
4.13 Installing the remote control holder
1. Find a convenient location to install the remote control holder (1).
2. Use the 2 countersunk screws (2) to secure the holder.

Fig. 20 Fixing the air distributor assembly to the mounting bracket
The following three steps are optional. The purpose of these steps is to close a potential gap between the air distributor and the ceiling of the vehicle by using 8 screws.

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4 | Installation instructions
Fig. 23 Remote control holder
4.14 Testing the system
l Test all air conditioner functions as described in Operating Instructions.
l Make sure that the condensate outlets are clear after installing the outdoor unit.
l Enter the new vehicle height and weight in the vehicle documents if required.
l Hand this document over to the new vehicle owner.

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Operating Instructions

5 Operating Instructions
5.1 Before usage
NOTE Before switching on, make sure that the supply voltage and frequency corresponds to the values of the air conditioner.
NOTE Make sure that the amperage provided by the external power supply is sufficient.
NOTE Always completely unwind the cable drum to prevent the power supply extension cable to the vehicle from overheating and loosing voltage.
NOTE The extension cable must have a minimum cross section of 3 x 2.5 mm².
NOTE You must make sure that the air outlet and intake grilles are not covered by cloths, paper or other objects.
NOTE After removing the remote control back cover, insert two (2) AAA LR3 leak-proof batteries into the remote control. Then replace the cover on the back.
NOTE When using the remote control, point it at the air distributor to have the best signal transmission. The air distributor beeps as soon as it receives a signal.
NOTE The icons that are shown in the remote control display depend on the settings you are accessing.
NOTE After selecting COOL or HEAT mode, the compressor may delay starting for 3 minutes. This feature protects the compressor.
NOTE To set the system clock, see chapter 5.11, “Setting the system clock” on page 14.
5.2 How to heat and cool effectively
The following general measures are very useful to reduce the heat load within a vehicle and improve the performance of the air conditioner:
l Park your vehicle in the shade when possible. l Position your vehicle with the sunshade facing the sun-side.
This reduces exposure to direct sunlight. l Close all doors, skylights and windows, close the curtains
and open the sunshade or awning. l Turn off within the vehicle, all electrical appliances running
unnecessary. This will further reduce the heat-load. l Cook outside the vehicle when possible. l In case of exceptionally high temperatures, turn on the air
conditioner in advance during the morning. l If vehicle interior has already heated up, ventilate your
vehicle by opening doors and windows before starting the A/C unit. l Regularly clean the vehicle’s roof; dirty roofs heat up more.

In the same way that many factors affect the total heat load within a vehicle, many additional factors can affect the air conditioner working efficiency. It may be advisable to consult your vehicle manufacturer to fully understand the total heat load of your vehicle.
5.3 Dealing with condensation
When warm and moist air within the vehicle meets a cold surface, this is likely to result in condensation water. This is also known as “sweating”. To deal with this:
l Close and seal all doors, skylights, and windows. This reduces the entrance of warm moist air.
l Operate the inside fan on High fan speed, avoiding Low and Auto fan speeds.
When operating the air conditioner, condensate water is produced and drained onto the roof. This is normal. The amount of condensate water depends on air humidity. High humidity inside your vehicle will result in more condensate water being generated.
NOTE Losses or damages caused by condensate water are not within the warranty scope.
5.4 Choosing and using a generator or inverter
The CTT 28V requires a mains-quality AC power source for correct operation. If you decide to supply power using a generator or an inverter, you must consult your generator / inverter supplier to confirm suitability and sizing of the generator / inverter for your application.
NOTE Losses or damage caused by the use of a generator or inverter are not within the warranty scope.

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4

6

7

3

8

9

2

10

1

11

25

12

24

13

23

14

22

15

21

16

20

17

19

18

Fig. 24 Remote control overview

Display icons

Information

1 Turbo function display

2 Fan speed dis- Low / Medium / High / Auto play

3 Temperature display

Shows the setpoint temperature or the indoor temperature. Units in °C or °F.

4 Data Transmis- Symbols shows up briefly when the resion

mote control transmits data to the A/C unit.

5 Mode display COOL / FAN / DRY / HEAT / AUTO

6 Battery display –

7 Timer ON / OFF status indicator

8 Clock / Timer Real time clock, Time of timer during display setup.

9 Eco display

ECO 1 / ECO2

10 Sleep function display

11 Lock function display

Operating buttons 12 LOCK
13 ON / OFF 14 FAN
15 MODE

Function
Disables the touch control on the air distributor when the unit is ON. Press the button again to unlock.
Switches the system On / Off.
Selects Low / Medium / High or AUTO fan speed. AUTO fan speed is only possible in COOL / HEAT mode. With AUTO fan speed the fan automatically adjusts between Low, Medium and High.
Selects the operation mode COOL / DRY / FAN / HEAT / AUTO.

16 SLEEP 17 ECO 18 SET TIME 19 HOUR/MIN 20 TIMER

Selects the sleep mode. Only available in COOL, HEAT or AUTO mode.
Select the eco mode ECO1 / ECO2. Only available in COOL or HEAT mode.
Enters CLOCK / TIMER setting mode.
Changes between hour or minutes settings.
Activates different timer settings.

21 DISPLAY 22 Down 23 TURBO 24 Up 25 °C/°F

Switches the display of the air distributor On / Off.
Adjusts the setpoint temperature, clock or timer.
Selects theTURBO mode. Only available in COOL or HEAT mode.
Adjusts the setpoint temperature, clock or timer.
Selects the temperature units, Celsius or Fahrenheit, of the temperature display.

5.6 Switching the unit ON / OFF

To switch the unit on, press the button on the remote control.

Fig. 25 Switching the unit on
l The unit switches on and the display of the air distributor shows the set temperature and operation mode.
l The display of the remote control shows the set temperature, operation mode and fan speed level.
l The last settings are retrieved. l The indoor fan may start immediately if the unit is in fan or
cool mode. If in heating mode there will be a delay while the inside coil heats up before the inside fan turns on – preventing a cold draft. l It may take up to 3 minutes for the compressor to start operation. This is a feature to protect the compressor.
To switch the unit off, press the button again.

Operating Instructions | 5

Fig. 26 Switching the unit off
l The unit switches off, the display of the air distributor blanks.
l The display of the remote control shows only the clock. You can also switch the unit on and off by pushing the touch button at the air distributor, see Operating the air distributor without the remote control for details.
5.7 Setting the temperature
Use the / buttons to change the set temperature.

5.10 Setting the operation mode
Press the MODE button on the remote control to change the operation mode. The remote control shows the selected icons.
l Each push on the MODE button changes the mode in the sequence as shown below.
Fig. 30 Setting the operation mode
COOL mode l In COOL mode the air distributor shows the symbol and the vehicle will be cooled. l Set temperature and fan speed can be selected manually. l The compressor switches off when the set temperature is reached, it automatically switches on again when the room temperature setting is exceeded.

Fig. 27 Setting the temperature
l Both the display of the remote control and the display of the air distributor show the set temperature.
l The air conditioner confirms receiving each set value change with a beep.
l You can set the temperature between 16 and 30 °C when the unit is running.
l You cannot set the temperature in FAN mode.
5.8 Setting the fan speed
Use the FAN button to set the fan speed level. l The fan speed level directly influences the air flow volume. l Each push on the FAN button changes the fan level in the sequence as shown below.
AUTO indicates that the Automatic FAN mode is selected. In this mode the fan speed adapts automatically. Automatic FAN mode is only available in operation mode COOL or HEAT.

Fig. 31 COOL mode
DRY mode l In DRY mode the unit is reducing the humidity inside the vehicle. l Set the temperature 1 °C lower than the current room temperature. l The air distributor shows the symbol.

Fig. 28 Setting the fan speed
5.9 Setting the turbo mode
Press the TURBO button to activate the turbo mode. The turbo mode offers extra powerful cooling or heating performance. The turbo mode is only available in operation mode COOL or HEAT.

Fig. 32 DRY mode
FAN mode l In FAN mode indoor air is circulated through the vehicle without heating or cooling. l You can manually set the fan speed. l The air distributor shows the icon as well as the current room temperature.

Fig. 29 Setting the turbo mode

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5 | Operating Instructions

l Press the “ECO” button 1 time to select the “ECO1” mode: The Cool Top Trail 28V is now operating at 70% of its capacity.
l Press the “ECO” button 2 times to select the “ECO2” mode The Cool Top Trail 28V is now operating at 40% of its capacity.
l Press the “ECO” button 3 times to exit the economy mode.
The ECONOMY mode is only available in operation mode COOL or HEAT.

Fig. 33 FAN mode
HEAT mode l In HEAT mode the air distributor shows the icon and the vehicle will be heated. l You can manually set the temperature and fan speed. l The compressor switches off when the set temperature is reached, it automatically switches on again when the room temperature drops below the set point.

Fig. 34 HEAT mode
NOTE
When operating in heating mode in low ambient temperatures the unit periodically defrosts the outside heat exchanger. The air distributor displays “dF” during defrosting and returns to heating when the defrost is completed.
AUTO mode l In AUTO mode the unit automatically selects heating or cooling mode depending on the difference between current room temperature and set point temperature. l You can manually select the set temperature and fan speed. l The air distributor shows the icon in heating mode and the icon in cooling mode as well as the set temperature.

Fig. 36 Economy mode
5.11 Setting the system clock
1. Press the SET TIME button. The hour digits are flashing now.
2. Press the / button to set the hour.
3. Press the HOUR/MIN button. The minute digits are flashing now.
4. Press the / button to set the minutes.
5. Press the SET TIME button 3 times to end the setting mode. Alternatively, wait 10 seconds until the digits stop flashing.

Fig. 35 AUTO mode
ECONOMY mode

Fig. 37 Setting the system clock
5.12 Setting the timer
The timer can be set to start and stop the unit at a pre-programmed time. In a first step these start and stop times must be set.
1. Press the SET TIME button twice until the upper right side of the clock displays ON and the hour digits are flashing.
2. Press the / button to set the hour when you want the unit to switch on.
3. Press the HOUR/MIN button, and then press the / button to set the minutes.
4. Press the SET TIME button again until the lower right side of the clock displays OFF and the hour digits are flashing.

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Operating Instructions | 5

5. Press the / button to set the hour when you want the unit to switch off.

6. Press the HOUR/MIN button, and then press the

/

button to set the minutes.

7. To end the setting mode press the SET TIME button again. The clock time is shown. Alternatively, 10 seconds until the digits stop flashing.

NOTE
You have now set the timer ON and OFF times, but these must be activated separately. See chapter 5.13, “Activating the timer” on page 15.

2. To confirm the selection wait 10 seconds until the symbol stops flashing and is shown permanently. The clock time is now displayed again.

Fig. 38 Setting the timer
5.13 Activating the timer
Before activating the timer, select the operation mode, the set temperature, and the desired fan level.
After the start and stop times are set (see chapter 5.12, “Setting the timer” on page 14) one of the three different TIMER modes can be activated:
l TIMER ON mode In this mode the unit will switch on at the desired ON time and keep on running.
l TIMER OFF mode In this mode the unit will stop running at the desired OFF time and will stay off.
l TIMER ON / OFF mode In this mode the unit will start to run at the ON time and stop running at the OFF time. This pattern will be repeated every day.

Fig. 40 Activating the timer
NOTE If the clock is displayed without an ON / OFF icon, then you have not activated the timer.
5.14 Setting the sleep function
The sleep function automatically modifies the target temperature to provide a comfortable sleeping temperature. This also helps to reduce compressor run time, energy consumption and noise levels. 1. Press the SLEEP button to activate the sleep function.
The icon is displayed in the display of the remote control to indicate that the sleep function is activated.
In COOL mode the set temperature will automatically increase in two steps and it will have increased by 2 °C after two hours.
In HEAT mode the set temperature will automatically decrease in three steps and it will have decreased by 3 °C after two hours.
The sleep function is only available in COOL or HEAT mode.
2. Press the SLEEP button again to deactivate the sleep function.
Fig. 41 Setting the sleep function
5.15 Changing the units of temperature
Press the °C/°F button to select which temperature unit you want to be displayed: Celsius or Fahrenheit.
l You can do this in any mode. l The display on the air distributor follows the selection made
on the remote control.

Fig. 39 TIMER Modes
1. Press the TIMER button repeatedly until either the ON or OFF or both symbols are flashing depending on which timer mode is preferred.

Fig. 42 Celsius / Fahrenheit selection

9044617A_OI-II_Cool Top Trail 28V

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5 | Operating Instructions

5.16 Resetting the remote control
To reset the remote control to factory settings:
1. Take out the batteries and then put them back in. See also chapter 6.2, “Remote control batteries” on page 17.
2. Set the clock again. See chapter 5.11, “Setting the system clock” on page 14.
3. Activate the timer again, if in use. See chapter 5.13, “Activating the timer” on page 15.

5.18 Adjusting the air outlets
Adjust the direction and angle of the air outlet by moving one blade around its axis. The two blades move together.

Fig. 46 Adjusting the air outlets

Fig. 43 Resetting the remote control
5.17 Operating the air distributor without the remote control
You can control the basic functions of the air conditioner by using the touch button on the display of the air distributor. This is useful if you cannot immediately find the remote control or if it has run out of power.
1. Press the touch button at the air distributor display. With each press you cycle through the modes: OFF, COOL, FAN, HEAT.

Fig. 44 Setting the operation mode
In cooling and heating mode the setpoint temperature is automatically set to 24 °C and the fan speed is set to HIGH.
2. Use the remote control to select any other temperature or fan speed.
3. You cannot select AUTO mode at the air distributor, but the display will show the “auto mode” icon in the top right corner if this has been selected through the remote control.

Fig. 45 Display on the air distributor

1

Touch button

2

Operation mode symbols

3

Temperature display

Maintenance

6 Maintenance
6.1 Air filter
The return air filter needs periodic maintenance.
1. Check and clean the filter every week, when in use, to prevent the filter from being blocked by dirt.
2. You must wash the filter frequently to ensure effective cooling and heating.
3. Remove the air filter from the air distributor by pushing both tabs (1) inwards (2) and then downwards (3).

Fig. 49 Remote control batteries
See also chapter 5.16, “Resetting the remote control” on page 16.
All batteries and electronic devices are the subject to European Directive 2006/66 / EC or 2002/96 / EC and later must not be disposed of with household waste. See also https://eurlex.europa.eu/advanced-search-form.html.
Every consumer is legally obliged to dispose of batteries and electronic equipment only in marked recycling bins at a waste collection point. The return is free of charge.

Fig. 47 Removing the air filter
4. Lift the filter (1) upward and pull out of the air grille (2) along the tracks.
1
2
Fig. 48 Air filter
5. Clean the filter and air grille with warm water and detergent.
6. Let it dry before installing again. NOTE Replacement filters can be ordered separately. Never operate the air conditioner without a filter. This can cause fouling of the heat exchanger and lead to a loss of power.
6.2 Remote control batteries
l Change the remote control batteries (2 x AAA type) when the display of the remote control becomes unreadable and / or blurry.
l Remove the batteries from the remote control if the remote control is not used for a long time to prevent damage to the remote control from leaking batteries.

See also: chapter 8, “Disposal” on page 19.
6.3 Bolt check
Check the four bolts holding the unit to the roof for tightness 3 months after first installation of the product. Inspect the bolts regularly; minimally every 12 months. Retighten to 7 Nm if necessary.
6.4 Regular usage
Webasto recommends that you operate air conditioner regularly to ensure good performance. Minimally run the unit every 6 months for at least for 20 – 30 minutes.
6.5 Cleaning
Regularly remove leaves or other dirt from the ventilation grilles of the outdoor unit.
l Regularly clean the unit using a soft, damp cloth and mild detergent.
l Clean the vehicle roof at regular intervals. A dirty roof heats up more than a clean roof.
CAUTION Never drive through automatic car washes with a roof air conditioner installed. Do not spray into the openings of the unit with a highpressure cleaner. Do not use hot cleaners and steam cleaners. Do not use sharp or hard objects for cleaning. Never use petrol, diesel, solvents or aggressive cleaning agents.
6.6 Heat exchangers
Minimally have your unit’s heat exchangers cleaned by a specialist workshop once per year.

9044617A_OI-II_Cool Top Trail 28V

Troubleshooting

7 Troubleshooting

Symptom Action

No air distributor display when the unit is turned ON.

Check if: l Power is supplied to the vehicle and circuit breakers are on. l The remote control battery is OK. l The remote control is off. l The voltage is too low. l The amperage of the circuit breaker in the external power supply is too low.

Cooling not Check that the cooling mode is selected and

available.

the air distributor display shows:

Symptom E5

Use the remote control to set required temperature below the current room temperature. The compressor will delay a re-start for 3 minutes.

Heating not Check that heating mode is selected and the

available.

air distributor display shows:

A1

LC

Use the remote control to set required temper-

ature above the current room temperature. More time would be needed for starting heat-

A4

ing under extremely cold condition.

C4

When the unit is in heating mode and the out-

side temperature is very low the unit may auto- b1

matically enter defrost mode. The heating will b2

temporarily stop as the unit warms the outside

heat exchanger to remove any frost & ice.

b3

Heating will resume when the outside heat ex- b5

changer has been cleared. During defrost the

b6

unit displays “dF”.

b9

Poor cooling Make sure the filter is clean.

capacity.

Increase the fan speed to high to obtain the maximum capacity.

bA

Make sure all the doors and windows as well

dF

as the sunroof are closed.

Use curtains and awnings to decrease the heat

load.

Check that the air openings of outdoor unit are

not soiled or blocked.

Water dripping Unblock condensate outlets of outdoor unit. out of the air Check the adaptor frame seal. distributor. Park the vehicle in a more horizontal position,
with an angle < 5° (8,8%). Increase the fan speed to high if condensate forms on the outside of the air distributor.

Fault codes on the panel:

–

If there is “0” or a jumbled display while on

generator supply this may indicate unstable

voltage and current.

E0

Communication fault.

E1

Room temperature sensor fault.

E2

Indoor heat exchanger temperature sensor

fault.

E3

Outdoor heat exchanger temperature sensor

fault.

E4

No cooling effect. Possible root causes are:

Action
l Insufficient refrigerant amount due to piping fracture.
l Compressor fault. l Sensor failure.
Outdoor heat exchanger temperature too high / Temperature anomaly. Temperature anomaly: outdoor heat exchanger temperature too high when cooling or too low when heating. (When cooling, the display of E5 indicates the outdoor temperature exceeds 64 °C. It is likely due to the reduction of air flow of the condenser, poor working of the condenser fan or sensor failure; when heating, if the outdoor temperature is higher than 18 °C, the external air fan may be on and off repeatedly. The occurrence of this is not a fault, but self- protection of the system to avoid overheating of the unit.)
Outdoor ambient temperature sensor fault
Motherboard and drive board communication fault
Compressor discharge temperature sensor fault
Compressor discharge over-temperature protection
Module protection
Module hardware protection
Module software protection
Compressor over-current protection
Overvoltage and undervoltage protection
Module heat sink temperature shutdown protection
Compressor stall protection
Not a fault: When operating on heating mode in low ambient temperatures the unit will periodically defrost the outside heat exchanger. The air distributor display shows “dF” during defrost operation and then returns to heating once the defrost is completed.

NOTE Before contacting Webasto for technical support please collect the following information. u Are any error codes displayed? u Is the display of the air distributor in normal opera-
tion or not? u Does it display a temperature from 16 to 30 °C? u Can you adjust the set point temperature when in
cool or heat mode? u Is there a “0” shown in the display? u Is the display showing a jumbled display? u When in fan mode is there any air flow from the air
distributor outlets? u Can you hear the compressor starting or stopping in
heating or cooling mode?
ð Your help in collecting this information will greatly assist the service team help you. Thank you!
8 Disposal
Dispose of packaging material as required by standing regulations, separating them for recycling. When your system has reached the end of its life, you cannot dispose of the system as regular waste. Make sure to dispose of the system in accordance with all local and national applicable rules and regulations. You can obtain information about disposal at your local municipality, the responsible waste station, and your local Webasto sales partner
Every consumer is legally obliged to dispose of batteries and electronic equipment only in marked recycling bins at a waste collection point. The return is free of charge.
See also: chapter 6.2, “Remote control batteries” on page 17.

Disposal

9044617A_OI-II_Cool Top Trail 28V

9 | Technical specifications

9 Technical specifications

Parameter

Value

Product name

Cool Top Trail 28V

Manufacturer model name Belaire H2800V

Power supply

220-240 V AC/50 Hz

Rated cooling capacity 2800 W

Rated heating capacity 2600 W

Input power for cooling 1100 W

Input power for heating 1100 W

Rated current for cooling 4.8 A

Rated current for heating 4.8 A

Maximum input power 1300 W

Maximum current

5.8 A

Operation at ambient tem- -5 °C to +50 °C peratures

Parameter Cooling possible at ambient temperatures Maximum design pressure Minimum design pressure Maximum air flow Weight outdoor unit Weight indoor unit Refrigerant charged Global Warming Potential (GWP) CO2 equivalent Maximum vehicle inclination angle during operation Dimensions IP rating

Value 16 °C to 50 °C 4500 kPa 3000 kPa 400 m³/h net 31.5 kg net 3.4 kg R410A/610 g 2088 1274 kg 5° (=8,8%)
See Fig. 5 / Fig. 6 IP24

NOTE
All parameters listed are subject to change without notice, and the specifications shown on the unit’s type plates shall prevail. All values are approximate and subject to change.

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9044617A_OI-II_Cool Top Trail 28V

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10 Wiring schematic

Wiring schematic | 10

Fig. 50 Wiring diagram
Item 1 2 3 4 5 6 7 8
Item 4WV AC-L AC-L DRV AC-N COMP DISP DRV-COMM DRV-L DRV-N ID IF IFL IFM IFH L1 L2 OA OD

Description Indoor heat exchanger sensor Outdoor ambient temperature sensor Outdoor heat exchanger sensor Comp sensor Room sensor Display panel CI-BUS (Option) Inverter compressor
Description 4-Way reversing Valve power supply connection, Phase Live supply port driver power supply connection, Neutral Compressor (sensor) Display and Room sensor Driver Communication (Inverter) Driver Live Driver Neutral InDoor (sensor) Indoor Fan Indoor Fan Low Indoor Fan Medium Indoor Fan High Reactance connector L1 Reactance connector L2 Outdoor Ambient (sensor) OutDoor (sensor)

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Wiring schematic

Item OF OFL OFH LOW PE SW PE U/R V/S W/T
Wiring code BK BN BU GNYE GY RD WH YE

Description Outdoor Fan Outdoor Fan Low Outdoor Fan High Low Protective Earth Switch Protective Earth L1, power from driver to compressor L2, power from driver to compressor L3, power from driver to compressor.
Wiring colour Black Brown Blue Green-Yellow Grey Red White Yellow