Troubleshooting - Gree GMV-ND07T/D-T(U) Owner's Manual

Error
Content
Code
Quantity Of Group Control
L9
Indoor Units Setting Error
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.
Multi Variable Air Conditioners Cassette Type Indoor Unit
Error
Code
Water Temperature Sensor
d8
High Bus bar Voltage of
o2
Overcurrent Protection of
o5
Communication Malfunction
o8
of Indoor Unit's Drive
Malfunction of Temperature
ob Sensor of Indoor Unit's
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
Error
Indoor Unit
Indoor Unit
Module
Special Code: Field Debugging Code
Troubleshooting
19
Error
Content
Code
AJ Filter Cleaning Reminder
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