Midea MHC-V4W/D2N8-B User Manual

M thermal Mono
202004 99
L4 troubleshooting(the same as L1/L2)
Situation 1: L4 error appears immediately after the outdoor unit is powered-on
L4
Replace the inverter PCB
Condition 2: L4 error appears after the compressor has been running for a period of time and the compressor speed is
over 60rps
L4
Compressor is over-current
2
Yes
Replace the compressor
No
Replace the inverter PCB
Notes:
1. Re-start the unit, use clip-on ammeter to measure the compressor current, if the current is normal indicates the compressor is failed, if the current is
abnormal indicates the inverter PCB is failed..
L5/L8/L9 troubleshooting
L5/L8/L9
The wire is not connected properly
NO
Ensure wire is connected properly
Yes
Inverter module PCB has malfunctioned
Yes
Replace inverter module PCB
No
Replace the compressor
Midea CAC Confidential

Midea MHC-V4W/D2N8-B Specifications

General

Brand	Midea
Model	MHC-V4W/D2N8-B
Category	Air Conditioner
Language	English