Midea MDV-V120W/DRN1

MCAC-VTSM-2016-10 R410A All DC Inverter Mini VRF
Troubleshooting 95
Condition 2: L1 or L2 error appears when the compressor operates at 20-30Hz.
L1 /L2
Contactor is failed
1
Yes
Replace the contactor
No
Replace the main PCB
Notes:
1. Check the voltage between two wires which are connected between contactor and main PCB, if the voltage is 220V AC and the
contactor is not contacted indicates the contactor is failed.
4.15.5 L4 troubleshooting
Condition 1: L4 error appears immediately when the outdoor unit is power on.
L4
Replace the main PCB