Carrier 40MBCQ Cassette Ductless System Instruction Manual

40MBCQ Cassette Ductless System
Instruction Manual

NOTE: The images in this manual are for illustration purposes only. The actual model may differ slightly.
NOTE: Read the entire instruction manual before starting the installation.

SAFETY CONSIDERATIONS

Installing, starting up, and servicing air−conditioning equipment can be hazardous due to system pressures, electrical components, and equipment location (roofs, elevated structures, etc.). Only trained, qualified installers and service mechanics should install, start−up, and service this equipment. Untrained personnel can perform basic maintenance functions such as cleaning coils. All other operations should only be performed by trained service personnel.
When working on the equipment, observe precautions in the literature and on tags, stickers, and labels attached to the equipment.
Follow all safety codes. Wear safety glasses and work gloves. Keep a quenching cloth and fire extinguisher nearby when brazing. Use care in handling, rigging, and setting bulky equipment.
Read these instructions thoroughly and follow all warnings or cautions included in the literature and attached to the unit. Consult the local building codes and National Electrical Code (NEC) for special requirements. Recognize safety information. This is the safety−alert symbol! !. When you see this symbol on the unit and in instructions or manuals, be alert to the potential for personal injury. Understand these signal words: DANGER,
WARNING, and CAUTION. These words are used with the safety−alert symbol. DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING signifies hazards which could result in personal injury or death. CAUTION is used to identify unsafe practices which may result in minor personal injury or product and property damage. NOTE is used to highlight suggestions which will result in enhanced installation, reliability, or operation.

WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or death.
Before installing, modifying, or servicing system, the main electrical disconnect switch must be in the OFF position. There may be more than 1 disconnect switch.
Lock out and tag switch with a suitable warning label.
WARNING
EXPLOSION HAZARD
Failure to follow this warning could  result in death, serious personal injury, and/or property damage.
Never use air or gases containing oxygen for leak testing or operating refrigerant compressors. Pressurized mixtures of air or gases containing oxygen can lead to an explosion.
CAUTION
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage or improper operation.
Do not bury more than 36 in. (914 mm) of refrigerant pipe in the ground. If any section of pipe is buried, there must be a 6 in. (152 mm) vertical rise to the valve connections on the outdoor units. If more than the recommended length is buried, refrigerant may migrate to the cooler buried section during extended periods of system shutdown. This causes refrigerant slugging and could possibly damage the compressor at start−up.
PARTS LIST
Table 1—Parts List

Note:

• If the outdoor unit is higher than the indoor unit, prevent rain from flowing into the indoor unit, along the connection pipe, by creating a downward are in the connection pipe before it enters the wall to the indoor unit. This ensures that rain drips from the connection pipe before entering the wall.
• Piping and the interconnecting wiring are field supplied.
• Fig.1 is only a sketch. Different models may differ slightly. See Table 2 for the units covered in these installation instructions.

Table 2—Indoor Units

SYSTEM REQUIREMENTS
Allow sufficient space for airflow and unit servicing. See Fig. 4 for the minimum required distances between the unit and the walls or ceilings.
PIPING
IMPORTANT: Both refrigerant lines must be insulated separately.

• Minimum refrigerant line length between the indoor and outdoor units is 10 ft. (3 m).
• Table 3 lists the pipe sizes for the indoor unit. Refer to the outdoor unit installation instructions for other allowed piping lengths and refrigerant information.

Table 3—Indoor Unit Pipe Sizes

Piping| SYSTEM SIZE| | 9K| 12K| 18K| 24K| 36K| 48K
---|---|---|---|---|---|---|---|---
Gas Pipe (size – connection type)| In. (mm)| 3/8 (9.52)| 1/2 (12.7)| 1/2 (12.7)| 5/8 (16)| 5/8 (16)| 5/8 (16)
Liquid Pipe (size – connection type)| In. (mm)| 1/4 (6.35)| 1/4 (6.35)| 1/4 (6.35)| 3/8 (9.52)| 3/8 (9.52)| 3/8 (9.52)

WIRING
All wires must be sized per NEC (National Electrical Code) or CEC (Canadian Electrical Code) and local codes. Use Electrical Data table MCA (minimum circuit amps) and MOCP (maximum over current protection) to correctly size the wires and the disconnect fuse or breakers respectively.
Recommended Connection Method for Power and Communication Wiring
Power and Communication Wiring: (09K through 24K)
The main power is supplied to the outdoor unit. The field supplied 14/3 power/communication wiring from the outdoor unit to the indoor unit consists of four (4) wires and provides the power for the indoor unit. Two wires are high voltage AC power, one is communication wiring and the other is a ground wire.
To minimize communication interference: If installed in a high Electromagnetic field (EMF) area and communication issues exist, a 14/2 stranded shielded wire can be used to replace L2 and (S) between outdoor unit and indoor unit − landing the shield onto ground in the outdoor unit only.
Recommended Connection Method for Power and
Communication Wiring (36K through 48K) Power Wiring: The main power is supplied to the outdoor unit. The field supplied power wiring from the outdoor unit to the indoor unit consists of three (3) wires and provides the power for the indoor unit. Two wires are high voltage AC power and one is a ground wire. To minimize voltage drop, the factory recommended wire size is 14/2 stranded with a ground.
Communication Wiring:
A separate shielded stranded copper conductor only, with a 600 volt rating and double insulated copper wire, must be used as the communication wire from the outdoor unit to the indoor unit.
Please use a separate shielded 16GA stranded control wire.
CAUTION
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage or improper operation.
Wires should be sized based on NEC and local codes.
CAUTION
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage or improper operation.

• Be sure to comply with local codes while running wire from indoor unit to outdoor unit.

• Every wire must be connected firmly. Loose wiring may cause terminal to overheat or result in unit malfunction. A fire hazard may also exist. Ensure all wiring is tightly
  connected.

• No wire should touch refrigerant tubing compressor or any moving parts.

• Disconnecting means must be provided and shall be located within sight and readily accessible from unit.

• Connecting cable with conduit shall be routed through hole in the conduit panel.

DIMENSIONS

| | 9K| 12K| 18K| 24K| 36K| 48K
---|---|---|---|---|---|---|---
UNIT SIZE| Body| Panel| Body| Panel| Body| Panel| Body| Panel| Body| Panel| Body| Panel
Height| in| 10.24| 1.97| 10.24| 1.97| 10.24| 1.97| 8.07| 2.17| 9.65| 2.17| 11.3| 2.17
Width| (mm)| -260| -50| -260| -50| -260| -50| -205| -55| -245| -55| -287| -55
Depth| In| 22.44| 25.47| 22.44| 25.47| 22.44| 25.47| 33.07| 37.4| 33.07| 37.4| 33.07| 37.4
| (mm)| -570| -647| -570| -647| -570| -647| -840| -950| -840| -950| -840| -950
| In| 22.44| 25.47| 22.44| 25.47| 22.44| 25.47| 33.07| 37.4| 33.07| 37.4| 33.07| 37.4
| (mm)| -570| -647| -570| -647| -570| -647| -840| -950| -840| -950| -840| -950

PACKAGING

Height| In| 11.42| 4.84| 11.42| 4.84| 11.42| 4.84| 8.54| 3.54| 10.12| 3.54| 11.5| 3.54
---|---|---|---|---|---|---|---|---|---|---|---|---|---
Width| (mm)| -290| -123| -290| -123| -290| -123| -217| -90| -257| -90| -292| -90
Depth| In| 25.79| 28.15| 25.79| 28.15| 25.79| 28.15| 35.43| 40.75| 35.43| 40.75| 35.43| 40.75
Weight­| (mm)| -655| -715| -655| -715| -655| -715| -900| -1035| -900| -1035| -900| -1035
Gross| | 25.79| 28.15| 25.79| 28.15| 25.79| 28.15| 35.43| 40.75| 35.43| 40.75| 35.43| 40.75
Weight­| In| -655| -715| -655| -715| -655| -715| -900| -1035| -900| -1035| -900| -1035
Net| (mm)| 41.88| 9.92| 41.88| 9.92| 46.3| 9.92| 54.23| 17.64| 66.14| 17.64| 72.53| 17.64
| Lbs| -19| -4.5| -19| -4.5| -21| -4.5| -24.6| -8| -30| -8| -32.9| -8
| (kg)| 35.27| 5.51| 35.27| 5.51| 39.68| 5.51| 46.3| 11.02| 58.2| 11.02| 63.27| 11.02
| | -16| -2.5| -16| -2.5| -18| -2.5| -21| -5| -26.4| -5| -28.7| -5

CLEARANCES INSTALLATION TIPS
Indoor Unit
Installation locations include:

• A location where no obstacles exist near the inlet and outlet areas.
• A location which can bear the indoor unit’s weight is critical.
• Do not install the indoor units near a direct source of heat such as irect sunlight or a heating appliance.
•  A location which provides appropriate clearances (see Fig. 4).
• Do not install the indoor unit in a location with special environmental conditions. For those applications, contact your
  Ductless Systems representative.

INDOOR UNIT INSTALLATION

1.  Obstructions should be removed from the indoor unit’s intake or outlet vents so air can flow throughout the room.
2. Ensure the installation is in accordance with the schematic diagram’s required clearances.
3. Select an install site that can withstand four times the indoor unit’s weight and would not increase the operating noise.
4.  Ensure the unit is level.
5. Select a location where condensated coagulated water can drain easily away from the outdoor unit.
6.  Ensure there is enough space for care and maintenance. Ensure the height between the indoor unit and ground is ≥ 3ft. (1m) or ≤ 16ft. (5m).
7. Ensure the install site can withstand a weight four times of the unit’s. If not, reinforce the site prior to installation. Refer to the install cardboard to determine where the location should be reinforced.

IMPORTANT: To guarantee a good performance, the unit must be installed by professional personnel in accordance with this manual.
IMPORTANT: Drilling holes in the ceiling must be performed by professional personnel. Fig. 6 – Relationship of ceiling opening to unit and suspension bolt position (Sizes 24−48) Fig. 7 – Relationship of ceiling opening to unit and suspension bolt position (Sizes 09−18)

1. Installation hook pitch dimensions
2. Indoor unit dimensions
3. Decoration panel dimensions
4. Refrigerant piping
5. Installation hook (X4)
6. Ceiling opening dimensions
7. Hanger bracket
8. False ceiling

Fig. 8 – Relationship of ceiling opening to unit and suspension bolt position (Sizes 24−48)
NOTE: Adjust the position to ensure the gaps between the indoor unit and the four sides of the false ceiling are even. The indoor unit’s lower part should sink into the false ceiling roughly 0.9in. (24mm).

1. Indoor unit
2. False ceiling

NOTE: Installation is possible with a ceiling dimension of 23.62 in. (600m) on sizes 9−18 and 34.5 in. on sizes 18−48 (marked with *). However to achieve a ceiling−panel overlapping dimension of 0.6 in. (15mm), the spacing between the ceiling and the unit should be 0.8 in. (20mm) or less. If the spacing between the ceiling and the unit is over 0.8 in. (20mm), attach the sealing material in the part or recover the ceiling.
INDOOR UNIT MAIN BODY INSTALLATION

1. Prepare the ceiling opening needed for installation where applicable (for existing ceilings).
   a. Create the ceiling opening required for installation. From the side of the opening to the casing outlet, implement the refrigerant and drain piping and wiring for the remote
   controller (unnecessary for the wireless type). Refer to each piping or wiring section.
   b. After creating an opening in the ceiling, it may be necessary to reinforce the ceiling beams to keep the ceiling level and to prevent it from vibrating. Consult the builder for details.

2. Install the installation hooks. Use either a M8 or M10 bolt.
   a. Use expansible hooks, sunken anchors or other field supplied parts to reinforce the ceiling to bear the unit’s weight.
   b. Adjust the clearance from the ceiling before proceeding further. For an installation example, see Fig. 10.

3. Ceiling slab

4. Expansible hook (optional)

5. Installation hook (optional)

6. False ceiling
   NOTE: For a non−standard installation, contact your dealer for details.
   When installing optional accessories, review the optional accessories list in the installation manual. Depending on field conditions, it may be easier to install optional accessories before the indoor unit is installed (except for the decoration panel). However, for an existing ceiling, install the fresh air inlet component kit (field Supplied) before installing the unit.

7. Install the indoor unit temporarily.
   a. Attach the hanger bracket to the suspension bolt. Be sure to fix it securely by using a nut and washer from the upper and lower sides of the hanger bracket.
   b. Secure the hanger bracket (see Fig. 11). (2.) Washer (field supply)
   (3.) Hanger bracket
   (4.) Double nuts (field supply, tighten)

8. Adjust the unit to the right position for installation.

9. Check if the unit is horizontally leveled.
   a. Do not install the unit tilted. The indoor unit is equipped with a built−in drain pump and a float switch.
   NOTE: If the unit is tilted against the direction of the condensate flow (the drain piping side is raised), the float switch may malfunction and cause water to drip.
   b. Check if the unit is level at all four corners with a water level or a water−filled vinyl tube (see Fig. 12).

10.  Water level

11. Vinyl tube

DRAIN PIPING WORK
Drain Piping Installation
Install the drain piping (see Fig. 13) and take steps to eliminate condensation. Improperly rigged piping could lead to leaks and eventually wet furniture and belongings.

1. Hanging bar
2. ≥1/100 gradient

Install the Drain Pipes
IMPORTANT: Observe all local sanitary codes when installing condensate drains.

• Keep the piping as short as possible and slope it downwards at a gradient of at least 1/100 so that air does not remain trapped inside the pipe.
•  Keep the pipe size equal to or greater than that of the connecting pipe (PVC pipe, nominal diameter 0.8 in. (20mm), outside diameter 0.98 in. (25mm)).
• Push the drain hose as far as possible over the drain socket, and tighten the metal clamp securely.

1. Drain socket (attached to the unit)
2. Metal clamp
3. Drain hose
4. Insulation (field supplied)
   a. Insulate the drain hose inside the building.
   b. If the drain hose cannot be sufficiently set on a slope, the hose with the drain raising piping (field supplied).
   c. Ensure the heat insulation work is executed on the following two spots to prevent any possible water leakage due to dew condensation:
   (1.) Indoor drain pipe
   (2.) Drain socket.

1. Ceiling slab
2. Hanger bracket
3. Adjustable range
4. Drain raising pipe
5. Drain hose
6. Metal clamp
   − Connect the drain hose to the drain raising pipes, and insulate them.
   − Connect the drain hose to the drain outlet on the indoor unit, and tighten it with the clamp.

NOTE: Drain setup pipe:

• The install height of the drain raising pipe should be less than 21 in. (530 mm).
• The drain raising pipe should form a right angle with the unit. The distance to the unit should not exceed 11.81 in. (300 mm).
• To prevent air bubbles, install the drain hose level at an angle slightly tilted upward (</3 in. / 75 mm).
• The drain hose incline should be 3 in. (75 mm) or less so the drain socket does not have to withstand additional force.
• To ensure a downward slope of 1:100, install the hanging bars every 3.3 ft. (1m) to /4.9 ft./(1.5 m).
• When unifying the multiple drain pipes, install the pipes as shown in Fig. 17. Select the converging drain pipes whose gauge is suitable for the operating capacity of the unit.

• Connect the drain hose to the drain raising pipes, and insulate them.
•  Connect the drain hose to the drain outlet on the indoor unit, and tighten it with the clamp.

DRAIN PIPE TESTING
After the piping work is finished, check if the drainage flows moothly.
Add approximately 1 liter of water gradually through the air discharge outlet. See Fig. 18 for the water adding method.

1. Plastic watering can (tube) should be about 3.9 in. (100 mm).
2. Water receiver.

Electrical Wiring

1. Remove the indoor unit control box lid.

2. Follow the “Wiring Diagram” label attached to the indoor unit’s control box lid to wire the outdoor unit, indoor unit and the wired remote controller.

3. Securely fix the wires with a field supplied clamp.

4. Attach the outdoor unit cover. When the electric wiring work is complete, check the drainage flow during COOL running.

5. Control box lid

6. Wiring diagram label

7. Power supply terminal block

8. Clamp for wiring

9. Wiring between units

10. Plastic cover

11. Clamp (field supply)

INSTALLATION OF THE DECORATION PANEL
Detach the intake grill

1. Slide the two grille hooks toward the middle of the decoration panel.
2. Open the intake grille and remove.

Install the decoration panel

1. Align the indication marks “ ” on the decoration panel to the indication marks “ ” on the unit.
2. Attach the decoration panel to the unit with the supplied screws (see Fig. 24).
3. After installing the decoration panel, ensure there is no space between the unit body and the decoration panel. Otherwise air may leak through the gap and cause dewdrops (see Fig. 23).
4. Mount the intake grille. Ensure the buckles at the back of the grille are properly seated in the panel’s groove.
5. Connect the decoration panel’s two wires to the unit’s mainboard (see Fig. 29).
6. Fasten the control box lid with two screws.
7. Close the intake grille, and close the two grille hooks.

CAUTION
UNIT DAMAGE HAZARD
If the unit is not hung correctly and a gap exists, the unit’s height must be adjusted to ensure proper function, the unit’s height can be adjusted by loosening the upper nut and adjusting the lower nut.
NOTE: If the height of the indoor unit needs to be adjusted, you can do so through the openings at the panel’s four corners. Make sure that the internal wiring and drainpipe are not affected by this adjustment.
ELECTRICAL DATA
Table 5—Electrical Data

| INDOOR FAN|
---|---|---
UNIT SIZE| OPER. VOLTAGE OPER. VOLTAGE
MAX / MIN*| V-PH-HZ| FLA| HP| W
9| 253 / 187| 208-230/1/60| 0.146| 0.061| 46
12| 0.146| 0.061| 46
18| 0.146| 0.061| 46
24| 0.332| 0.057| 58
36| 0.8| 0.169| 141
48| 1.6| 0.231| 232

MAX FUSE CB AMP
Refer to outdoor unit installation instructions – Indoor unit powered by the outdoor unit
*Permissible limits of the voltage range at which the unit will operate satisfactorily.
LEGEND
FLA – Full Load Amps
CONNECTION DIAGRAMS Notes:

1. Do not use the thermostat wire for any connection between indoor and outdoor units.
2. All connections between the indoor and outdoor units must be as shown. The connections are sensitive to polarity and will result in a fault code.

INSTALL ALL POWER, INTERCONNECTING WIRING, AND PIPING TO INDOOR UNIT

1. Run interconnecting piping and wiring from the outdoor unit to the indoor unit.
2. Connect wiring from the outdoor unit per the connection diagram (see Fig. 35).
3. Replace the field wiring cover and close the indoor unit front cover.
4. Connect the refrigerant piping and a drain line outside of the indoor unit. Complete the pipe insulation at the flare connection then fasten the piping and wiring to the wall as required. Completely seal the hole in the wall.
5. Piping:
   a. Cut the pipe, with a pipe cutter, at 90 degrees (see Fig. 38).
   b. Remove the service connection, if provided with the unit.c. Remove all the burrs from the cut cross section of the pipe avoiding any burrs inside the tubes.
   d. Remove the flare nuts attached to the indoor and outdoor units.
   e. Install the correct size flare nut onto the tubing and make the flare connection. See Table 6 for the flare nut spaces.

Table 6—Flare Nut Spacing

f. Apply a small amount of refrigerant oil to the flare connection on the tubing.
g. Align the center of the pipes and/or service valve.h. Connect both the liquid and gas piping to the indoor unit.
i. Tighten the flare nut using a torque wrench as specified in Table 7.
Table 7—Tightening Torque

| TIGHTENING TORQUE
---|---
PIPEDIAMETER INCH (mm)| Ft-lb| N-m
Ø1/4” (6.35)| 10 to 13| 13.6 to 17.6
Ø3/8” (9.52)| 24 to 31| 32.5 to 42.0
Ø1/2” (12.7)| 37 to 46| 50.1 to 62.3
Ø5/8” (15.88)| 50 to 60| 67.7 to 81.3

Connect the drain line. The drain line must not have a trap anywhere in its length. The drain line must pitch downwardsThe drain line must be insulated up to the outside wall.
NOTE: For applications where gravity cannot be used for drainage, a condensate pump accessory is available. Consult the condensate pump Installation Instructions for more information.
WIRELESS REMOTE CONTROL INSTALLATION
Mounting Bracket (if installed on the wall)
1. Use the two screws supplied with the control to attach the mounting bracket to the wall in a location selected by the customer and within operating range.
2. Install the remote control batteries.
3. Place the remote control into the remote control mounting bracket.
4. For remote control operation, refer to unit owner’s manual.
WIRED REMOTE CONTROLLER
For setup instructions, refer to the wired controller installation manual. Refer to Fig. 23 for the 4 and 5 Pin connections for the different wired remote controllers.
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage or improper operation.
Never use the system compressor as a vacuum pump.
Refrigerant tubes and the indoor coil should be evacuated using the recommended deep vacuum method (500 microns). The alternate triple evacuation method may be used if the procedure outlined below is followed. Always break a vacuum with dry nitrogen.
FINAL TUBING CHECK
IMPORTANT: Ensure certain factory tubing on the indoor unit has not shifted during shipment. Ensure tubes are not rubbing against each other or any sheet metal. Pay close attention to the feeder tubes, making sure the wire ties on the feeder tubes are secure and tight. START−UP
Test Operation
Perform a test operation after completing a gas leak and electrical safety check.

1. Press ON/OFF (on the remote control) to begin testing.
   NOTE: A protection feature prevents the air conditioner from being activated for approximately 3 to 4 minutes.

2. Press MODE and select the COOLING, HEATING, FAN modes to ensure all the functions work correctly.

3. To run the test using the manual button in the indoor unit:
   (1.) Open the indoor unit’s front panel;
   (2.) Press manual switch once to energize the unit. Set conditions of the manual operation are as follows:
   · Preset set point: 76° F (24° C)
   · Fan speed: AUTO
   · Discharge air direction: Pre−set position based on operation in COOL or HEAT mode.

4. Be sure to set the manual switch to OFF (by pressing it twice again) after finishing the test operation.

SYSTEM CHECKS
1. Conceal the tubing where possible.
2. Ensure the drain tube slopes downward along its entire length.
3. Ensure all tubing and connections are properly insulated.
4. Fasten the tubes to the outside wall, when possible.
5. Seal the hole through which the cables and tubing pass.
INDOOR UNIT
1. Do all the remote control buttons function properly?
2. Do the display panel lights work properly?
3. Does the air deflection louver function properly?
4. Does the drain work?
OUTDOOR UNIT

1.  Are there unusual noises or vibrations during operation?

Explain Following Items To Customer (with the aid of the Owner’s Manual):

1. How to turn the air conditioner on and off; selecting COOLING, HEATING and other operating modes; setting a desired temperature; setting the timer to automatically start and stop the air conditioner operation; and all other features of the remote control and display panel.
2.  How to remove and clean the air filter.
3. How to set air deflection louver.
4. Explain care and maintenance.
5. Present the owner’s manual and installation instructions to customer.

TROUBLESHOOTING

For ease of service, the systems are equipped with diagnostic code display LEDs on both the indoor and outdoor units. The outdoor diagnostic display consists of two LEDs (Red and Green) on the outdoor unit board and is limited to a few errors.
The indoor diagnostic display is a combination of flashing LEDs on the display panel or the front of the unit. If possible, always check the diagnostic codes displayed on the indoor unit first. The diagnostic codes displayed on the indoor unit are listed in Table 8.
INDOOR UNIT DIAGNOSTIC GUIDES
Table 8—Indoor Unit Diagnostic Guides

circuit
☆6 times| X| E5| Evaporator coil temperature sensor T2 open circuit or short circuit
☆7 times| X| EC| Refrigerant leakage detection
☆8 times| X| EE| Water-level alarm malfunction
☆1 time| O| F0| Current overload protection
☆2 times| O| F1| Open circuit or short circuit of outdoor ambient temperature sensor T4
☆3 times| O| F2| Open circuit or short circuit of condenser coil temperature sensor T3
☆4 times| O| F3| Open circuit or short circuit of Compressor discharge temperature sensor T5
☆5 times| O| F4| Outdoor unit EEPROM error
☆6 times| O| F5| Outdoor fan speed has been out of control
☆7 times| O| F6| T2B sensor error
☆8 times| O| F7| Lifting-panel communication error
☆9 times| O| F8| Lifting-panel malfunction
☆10 times| O| F9| Lifting-panel is not closed
☆1 time| ☆| P0| IPM malfunction
☆2 times| ☆| P1| Over voltage or over low voltage protection
☆3 times| ☆| P2| High temperature protection of compressor top
☆4 times| ☆| P3| Outdoor low temperature protection
☆5 times| ☆| P4| Inverter compressor drive error
☆6 times| ☆| P5| Mode conflict
☆7 times| ☆| P6| Compressor low-pressure protection
☆8 times| ☆| P7| Outdoor IGBT temperature sensor error

O (light) X (off) ☆ (flash)
For additional diagnostic information, refer to the Service Manual.

Copyright 2021 CAC / BDP
3300 Riverwood Atlanta GA 30339
Edition Date: 12/21
Catalog No: IM-40MBCQ-04
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Replaces:IM-40MBCQ-03

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