Gree UM600PH/A-M, Service Manual

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GREE Duct type Ducted Type Split Air-Conditioner Units
85
(3) “A4” oil return
Fault display: the main board of outdoor unit and indoor unit will display .
Applicable model: all models.
Judgment condition and method for the fault
：
It is a status code, which means the system has
entered oil return status, if the oil returns under heating mode, the indoor fan will suspend for 5-10min.
Possible reason: the load for the air conditioner is low, unit compressor has been operating in low
frequency for a long time.
Troubleshooting: not faulted.
(4) “A6” cooling/heating function setting
Fault display:
the main board of outdoor unit will display
.
Applicable model:
all models.
Judgment condition and method for the fault
：
It is a status code, which means the system has
entered cooling/heating function setting status, at this time, choose cooling/heating (nA), cooling only
(nC), heating only (nH) and fan blow (nF) for setting.
Possible reason
：
——
Troubleshooting: not faulted.
(5) “A7” quiet mode setting
Fault display: the main board of outdoor unit will display .
Applicable model: all models.
Judgment condition and method for the fault
：
It is a status code, which means the system has
entered quiet mode setting status.
Judgment condition and method for the fault
：
——
Troubleshooting
：
——
(6) “AH” heating
Fault display: the main board of outdoor unit will display .
Applicable model: all models.
Judgment condition and method for the fault
：
It is a status code, which means the system has
entered heating mode setting status.
Possible reason
：
——
Troubleshooting
：
——
(7) “AC” cooling
Fault display: the main board of outdoor unit will display .