Multi Variable Air Conditioners Compact Cassette Type Indoor Unit
20
Error
Code
Content
Error
Code
Content
Error
Code
Content
L7
No Master Indoor Unit
Error
d6
Outlet Pipe
Temperature Sensor
Error
dy
Water Temperature
Sensor Error
L8
Power Insufficiency
Protection
d7
Humidity Sensor Error
C0
Communication Error
L9
Quantity Of Group
Control Indoor Units
Setting Error
d8
Water Temperature
Error
AJ
Filter Cleaning
Reminder
db
Special Code: Field Debugging Code
8 Troubleshooting
The air conditioner is not expected to be serviced by users. Incorrect repair may cause electric
shock or fire, so please contact an authorized service center for professional service. The following
checks prior to contact may save your time and money.
Phenomenon
Troubleshooting
The unit can’t start
①
Power supply is not connected
②
Circuit breaker tripping caused by leakage of electricity
③
Input voltage is too low
④
Operation button is off
⑤
Error of control loop
The unit stops after running
for a while
①
There is obstacle in front of condenser
②
Error of control loop
③
Perform cooling when outdoor ambient temperature is higher
than 43°C(109°F)
Poor cooling effect
①
The filter is dirty or blocked
②
Too heavy heat load of room (e.g. too many people)
③
Door or windows is open
④
Air inlet and outlet of IDU are blocked
⑤
Set temperature is too high or refrigerant leaks
⑥
The performance of room temperature sensor gets worse
Poor heating effect
①
The filter is dirty or blocked
②
Door or window is open
③
Set temperature is too low
④
Refrigerant leaks
⑤
Outdoor ambient temperature is lower than -5°C(23°F)
⑥
Error of control circuit
Indoor fan doesn’t start
up during heating
①
Position of tube temperature sensor is improper
②
Tube temperature sensor is not inserted well
③
Wiring of tube temperature sensor breaks off
④
Electrical leakage of capacitor
If air conditioner still fails to work normally after checking and handling as
described above, please stop using it immediately and contact local service center for assistance.
Содержание GMV-ND07T/B-T
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