GREE U-Match 5 SERIES UNIT SERVICE MANUAL
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■PFC module is damaged.
■Drive board PFC current sampling circuit element is damaged or drive chip PFC current sampling AD terminal is
abnormal.
Troubleshooting：
PA AC current protection
Grid voltage is normal or not ?
Compressor is running at high
frequency and high load ?
Replace the
drive board .
Normal
protection
NO
NO
YES
YES
3.4.32 ―Pc‖ Driver Current Error
Error display: ODU mainboard, IDU wired control and IDU receiver light board will display PC
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：
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