“Pu” Charge Loop Error - Gree U-Match 5 Series Manual

GREE
Troubleshooting：
3.4.36 "PU" Charge Loop Error
Error display: ODU mainboard, IDU wired controller and IDU receiver light board will display PU
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.
Possible reason:
■Voltage of power grid is abnormal. Voltage is too low.
■Drive board charge loop element is abnormal.
■Drive board busbar voltage sampling circuit element is damaged or drive chip busbar voltage sampling AD
terminal is abnormal.
Troubleshooting：
PU
Charge loop error
Grid voltage is too low ?
NO
Replace the drive board
U-Match 5 SERIES UNIT SERVICE MANUAL
YES
Normal protection
86