YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
YMGI: Your Modern Green Idea
53
“Pc” Driver Current Error
Error display:
ODU mainboard LED displayer
Error judgment condition and method:
After power charging, if offset voltage average is detected to exceed 12.5% of 1.65V in 1s, then it can be judged that
current detection (or current sensor) circuit is faulted. System will shut down for protection.
Possible reason:
Current detection (or current sensor) sampling circuit element is abnormal.
Drive chip compressor current sampling AD terminal is badly welded or short-circuited.
Troubleshooting
：
“PL” Bus Low-Voltage Protection
Error display:
ODU mainboard LED displayer
Error judgment condition and method:
When compressor is running and there is no other malfunction, if busbar voltage is lower than the set value for low
voltage protection, then it can be judged that bus low-voltage protection occurs. System will shut down for protection.
Possible reason:
Voltage of power grid is abnormal.
Drive board busbar voltage sampling circuit element is damaged or driveboard busbar voltage sampling AD
terminal is abnormal.
Troubleshooting
：
