GREE DC INVERTER HEAT PUMP CONDENSING UNIT SERVICE MANUAL
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Troubleshooting
：
3.4.26 “ee” Drive Memory Chip Error
Error display:
ODU mainboard LED displayer
Error judgment condition and method:
If power is connected but the drive board with memory chip cannot detect the memory chip or read the
memory chip data correctly, then it can be judged that drive memory chip error exists.
Possible reason:
■The drive board that needs memory chip is not installed with the memory chip.
■The lead or connector of memory chip is badly welded or short-circuited.
Troubleshooting
：
ee Drive memory chip error
Drive board is installed with
memory chip or not?
Install the
memory chip .
Replace the drive
board .
YES
NO
3.4.27 “PU” Capacitor charging failure
Error display:
ODU mainboard LED displayer
Error judgment condition and method:
When the charge loop starts to get charged and the busbar voltage cannot reach the set value in a certain
period of time, then it can be judged that charge loop error exists. System will shut down for protection.
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