Gree UM600PH/A-M, Service Manual

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GREE Duct type Ducted Type Split Air-Conditioner Units
91
(16) “C6” alarming due to wrong quantity of outdoor unit
Fault display: the main board of outdoor unit and indoor unit will display .
Applicable model: all outdoor units.
Judgment condition and method for the fault
：
The system will detect the quantity of online
outdoor module at real time. When the detected quantity of current module is inconsistent with the one
memorized by previous debugging, the unit will give alarm and stopt the unit for protection.
Possible reason
：
1) Communication among modules is abnormal.
2) No electricity for the module.
Troubleshooting
：
1) If the communication cable is loose, reconnect it.
2) If the communication cable is broken, replace it.
3) Check contact of the communication cable.
4) Replace the control board.
(17) “CC” malfunction of no main control unit
Fault display: the main board of outdoor unit and indoor unit will display .
Applicable model: all outdoor units.
Judgment condition and method for the fault
：
The main board will detect the dial-code of master
control unit
（
SA6
）
to judge if it is the master control unit.
Possible reason
：
1) Switch the SA6 dial switch of an ODU to 00.
2) Replace the control board or switch an ODU's SA6 dial switch to 00.
(18) “d1” Indoor circuit board error
Error display: wired controller of IDU and the dash receiver of IDU will display .
Applicable mode: all indoor units.
Error judgment condition and method:
Check if the reading of address chip and memory chip of
IDU mainboard is normal. If the data of address chip and memory chip cannot be read, it is abnormal.
Possible reason
：
1) Address chip is abnormal.
2) Memory chip is abnormal.
Troubleshooting:
Replace main control board directly.
(19) “d3” Ambient temperature sensor error
Error display: wired controller of IDU and the dash receiver of IDU will display .