Gree GMVVQ1015WM/C-X, Service Manual

Page: 187 / 433

Gree GMV6 HR DC Inverter VRF Units Service Manual
185
2.122 "L4" Supply Power Over-current Protection
Fault display: wired controller of indoor unit and receiver of indoor unit display
Applicable models: all indoor units
Fault diagnosis:
When the current supplied to the wired controller by the indoor unit is too large, the fault is
generated.
Possible causes:
■ The wires of
the wired controller are short circuited;
■ The main board of indoor unit operates improperly;
■ The main board of the wired controller is abnormal.
Troubleshooting:
"L4" Sup ply Po wer
Over-current Protection
Whether th e p ower
cord of the wi red con tro ller is
short circuited?
Replace th e wire d controlle r
Yes
No
Reconnect the power co rd of
the wire d con troll er
Yes
No
Is th e main bo ard of the wir ed
controller abn ormal?
The ma in b oard of in door
unit opera tes imp roperly
Replace th e main bo ard of
indo or unit
Yes