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B7 - MID ESP DUCT

B7 - MID ESP DUCT

Maintenance Durability Built for Longevity. Designed for Service.

MODEL: 
From Sizes 18K Btu - 30K Btu

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  • Description
  • Error Codes

Ducted Unit

Flexible Air Intake Option
Two types of air intakes, rear and bottom (optional), which can meet different requirements.

Optional Drainage Pump
Lifting the water of the IDU up to 700mm to drain it away and can adapt to various installation requirements.

Two Way Drainage Directions
Two-way drainage directions (left and right) to simplify installation.

Removable Control Box
Convenient design for easy removal by simply loosening two screws.

B7 Ducted Unit 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

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