GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
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2.2.4.12 “AJ” Filter dirty alarm
Error display:
IDU wired controller and IDU receive light board will display
Error judgment condition and method:
This code is status code, which means the indoor unit has entered filter dirty period, the filter need
cleaning. The period can be set according to actual operating environment.
Possible reason：——
Troubleshooting:
Clean the filter and eliminate remind to enter into the next service cycle.
2.2.4.13 “AP” Unit startup debug confirmation
Error display:
ODU mainboard
will display
Error judgment condition and method:
This code is status code, which means whether it is ready for the debug procedure or not or unit
status can be started.
Possible reason：——
Troubleshooting:
status code, no troubleshooting.
2.2.4.14 “AU” Long-distance control emergency stop status
Error display:
ODU mainboard, IDU wired controller and IDU receive light board will display
Error judgment condition and method:
This code is status code, which means the unit has been long-distance controlled as emergency
stop status, unless the status is removed, otherwise, you cannot start up the unit for operation.
Possible reason：——
Troubleshooting:
status code, no troubleshooting.
2.2.4.15 “Ab” Emergency stop operation status
Error display:
ODU mainboard, IDU wired controller and IDU receive light board will display
Error judgment condition and method:
This code is status code, which means ODU mainboard has received the external emergency stop
signal, unless the status is removed, otherwise, you cannot start up the unit for operation.
Possible reason：——
Troubleshooting:
status code, no troubleshooting.
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