R410A All DC Inverter Mini VRF CSCMA-APH-6-SM1907A
92 Troubleshooting
Condition 2: L1 or L2 error appears when the compressor operates more than 20Hz.
L1 /L2
Relay on main PCB is open
Yes
Replace the main PCB or transformer
No
PFC on inverter module is failed
2
Yes
Replace the inverter module
Notes:
1. If the fan motor is running and the DC voltage between terminal P and N on inverter module is not 380V indicates the PFC is failed.