Multi Variable Air Conditioners Cassette Type Indoor Unit
20
Error
Code
Content
Error
Code
Content
Error
Code
Content
o1
Low Bus bar Voltage of
Indoor Unit
o2
High Bus bar Voltage of
Indoor Unit
o3
IPM Module Protection of
Indoor Unit
o4
Failure Startup of Indoor
Unit
o5
Overcurrent Protection of
Indoor Unit
o6
Current Detection Circuit
Malfunction of Indoor
Unit
o7
Desynchronizing
Protection of Indoor Unit
o8
Communication
Malfunction of Indoor Unit’s
Drive
o9
Communication
Malfunction of Main
Mater of Indoor Unit
oA
High Temperature of
Indoor Unit’s Module
ob
Malfunction of
Temperature Sensor of
Indoor Unit’s Module
oC
Charging Circuit
Malfunction of Indoor
Unit
o0
Other Drive Malfunction
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
Defect of main PC-board.
The unit stops after running
for a while.
①
The inlet or outlets of ODU or IDU are blocked by obstacle.
Poor cooling effect.
①
The filter is dirty.
②
Too heavy heat load of room (e.g. too many people).
③
Door or windows is open.
④
Inlet and outlet of IDU are blocked.
⑤
Setting temperature is too high.
⑥
Refrigerant is insufficient (e.g. refrigerant leakage).
Poor heating effect.
①
The filter is dirty.
②
Door or window is open.
③
Setting temperature is too low.
④
Refrigerant is insufficient (e.g. refrigerant leakage).
Indoor fan doesn’t start up
during heating.
①
At starting, the IDU fan could not operate till the heat exchange become hot, for
preventing delivering the cool air.
②
At defrosting, the IDU fan stopped due to system switch to cooling mode. For
preventing delivering the cool air, and resume operating after defrosting.
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.
Summary of Contents for GMV-ND07T/C-T
Page 25: ......
