Service manual

Service Manual 52
Troubleshooting Guide
Water leakage
Wrap of refrigerant pipe connector is not
tight enough
Re-wrap and make it tight
Abnormal sound
and vibration
Fan of indoor unit contacts other parts
Adjust fan location
There is foreign substance in indoor unit
Take out the foreign substance
Compressor shakes too much
Adjust support washer of the compressor
and tighten loose bolts
Touch of pipeline of outdoor unit
Separate the touched pipeline
Touch of inner plates
1. Tighten connecting screws
2.
Stick shock-absorbing clay between plates
Touch of outdoor unit fan blade with
outer case
Adjust louver position
Replace compressor
Abnormal sound inside compressor
Abnormal electromagnetic sound inside
four-way valve when heating
Short circuit inside electromagnetic
valve. Re
p
lace the electroma
g
netic valve
Fan doesn't run
when FAN mode
is set
Burn-out or broken wire of indoor fan
motor
Repair or change the fan motor
Wire according to the circuit diagram
Wrong wiring
Circuit break or damage of fan motor
capacitor
Replace the main control board
Blockage or breakage of drainage hose
Replace the drainage hose
Wrong wiring
Wire according to the circuit diagram
When cooling or
heating, outdoor
fan runs, but
compressor
doesn't run.
Compressor temperature is too high
Cool the compressor for 30 min before running
Damage of main control board Replace the main control board