IQ Air Conditioners | on cue for you
Call Us Now
+27 10 493 8746 Get A Quote

B7 CASSETTE

B7 Cassette  

Light Commercial B7 Cassette unit.

MODEL: 
From Sizes 12K Btu - 60K Btu

GET A QOUTE DOWNLOAD
  • Description
  • Error Codes

B7 Inverter Cassette Unit

Inverter Compressor
The compressor adopts the latest DC inverter technology, which greatly improves performance and saves up to 30% energy.

5-Fold Exchanger
Adopts a 5-fold evaporator, which has a larger heat exchange area and a 12% increase in heat efficiency compared to the traditional 4-fold evaporator.

Refrigerant-Cooling PCB
The latest refrigerant-cooling technology is adopted to improve the heat dissipation of the PC Board, ensuring safe and stable operation of the PC Board, and prolongs the lifespan.

New Inverter Technology
The new patented inverter technology without electrolytic capacitor solves after-sales problems such as capacitor bulge and leakage in the traditional electrolytic capacitor drive scheme.

Coated Circuit Board
The circuit board is coated with protective coating to avoid the impact of humidity on the PC Board.

B7 Inverter Troubleshooting Codes

Download Troubleshooting PDF

When AC has failure, indoor display board and wire controller will show error codes:

Error Code Error Code Definition Auto Recovery Possible Causes
E0 Lack of refrigerant No Compressor internal protection
System is short of refrigerant
Reversing failure of 4-way valve
E1 TA (Indoor temperature sensor) is abnormal Yes Sensor damage
Poor contact of sensor
E2 TW (Defrosting temperature sensor) is abnormal Yes Sensor damage
Poor contact of sensor
E3 TE (Indoor coil sensor) is abnormal Yes Sensor damage
Poor contact of sensor
E4 Drainage system failure Yes Damage of water pump
Damage of water level switch
Water level switch is locked
E5 Communication failure of wired controller Yes Communication wire sequence error
Poor contact of communication wire
E6 Outdoor unit protection (phase sequence) No The power cable phase is missing
Power cable phase sequence error
E7 TL (Outdoor condensing temperature sensor) is abnormal Yes Sensor damage
Poor contact of sensor
E8 TP (Discharge temperature sensor) is abnormal Yes Sensor damage
Poor contact of sensor
E9 Low pressure protection Yes System is short of refrigerant
EA Outdoor unit protection (Discharge temperature is too high) No External protection device action
F1 Communication failure between indoor unit and outdoor unit Yes Communication wire sequence error
Poor contact of communication wire
F2 Exhaust overtemperature protection Yes System is blocked or fault of the outdoor fan
F3 Outdoor fan is abnormal Yes Poor contact of outdoor motor
Motor is broken
F4 Indoor fan is abnormal Yes Poor contact of indoor motor
Motor is broken
F5 Outdoor temperature sensor is abnormal Yes Sensor damage
Poor contact of sensor
F6 Compressor overcurrent protection No Compressor is blocked
Low voltage
F7 Dial switch is abnormal Yes Wrong position of dial switch
F8 Indoor power protection Yes Wrong wiring
F9 High pressure protection Yes Condenser is blocked
Abnormal operation of the outdoor fan
System pipe is blocked

Related Products

B6 Cassette

B6 Celling & Floor Standing

B6 Ducted