GREE U-Match 5 SERIES UNIT SERVICE MANUAL
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Troubleshooting
：
P6
Master control and driver
communication error
The communication wire between
master contro l and driver is not
connected, or is badly connected,
or broken?
Reconnect or replace
the communication wire.
Replace the drive board
YES
NO
Error still exists?
Replace the master
control board.
YES
3.4.29
―P7‖ Driver Module Sensor Error
Error display:
ODU mainboard, IDU wired control and IDU receiver light board will display
P7
Error judgment condition and method:
If IPM or PFC module temperature is lower than the set protection value, then it can be judged that driver
module sensor error occurs and system will shut down for protection.
Possible reason:
■Module temperature sensor is short-circuited or broken-circuited.
■Drive board current sampling circuit element is damaged or drive chip current sampling AD terminal is
abnormal.
Troubleshooting
：
P7
Driver module sensor error
Replace the drive board
