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L0~L9 OR H4: COMPRESSOR MODULE PROTECTION
DEFINITION
H4:
L0 or L1 errors happen for three times in 60 seconds. The unit will stop and requires recycling power to restart.
Fig. 60 —L0~L9 Troubleshooting Chart
POSSIBLE CAUSES
• ODU system in poor heat dissipation
• IPM in poor heat dissipation
• Improper power supply
• Damaged compressor module in power drive board
• Burnt compressor
• Improper refrigerant in the system
Error
Detailed Definition
Number of Flashing Times for Green LED
Red LED
Compressor module protection
L0: Error in compressor module
8
Light on constantly
L1: DC bus under-voltage protection
9
L2: DC bus over-voltage protection
10
L4: Compressor MCE error
12
L8: Compressor speed difference between set
and run is more than 15 rps
16
L9: Compressor speed difference is more than
15 rps in one second
17
A210298