GREE DC INVERTER HEAT PUMP CONDENSING UNIT
50
Troubleshooting
：
PU
Charge loop error
Normal protection
Replace the drive board
Grid voltage is too low ?
YES
NO
3.4.25 “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
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