Troubleshooting - Gree GMV-ND07T/C-T Owner's Manual

Multi Variable Air Conditioners Cassette Type Indoor Unit
Error
Content
Code
Low Bus bar Voltage of
o1
Indoor Unit
Failure Startup of Indoor
o4
Unit
Desynchronizing
o7
Protection of Indoor Unit
High Temperature of
oA
Indoor Unit's Module
o0 Other Drive Malfunction

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
The unit can't start.
The unit stops after running
for a while.
Poor cooling effect.
Poor heating effect.
Indoor fan doesn't start up
during heating.
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.
Error
Code
High Bus bar Voltage of
o2
Overcurrent Protection of
o5
o8 Malfunction of Indoor Unit's
ob Temperature Sensor of
Indoor Unit's Module
db
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.
① The inlet or outlets of ODU or IDU are blocked by obstacle.
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).
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).
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.
Content
Indoor Unit
Indoor Unit
Communication
Drive
Malfunction of
Special Code: Field Debugging Code
Troubleshooting
20
Error
Content
Code
IPM Module Protection of
o3
Indoor Unit
Current Detection Circuit
o6 Malfunction of Indoor
Unit
Communication
o9 Malfunction of Main
Mater of Indoor Unit
Charging Circuit
oC Malfunction of Indoor
Unit