Service diagnosis 
7.4.12 
Over-current of the compressor
Outdoor display        
 
Domestic air conditioner
Method of 
malfunction 
detection 
LED1 flash 3 times        Indoor Display F22 
LED1 flash 24 times       Indoor Display F2
 
LED1 flash 25times Indoor Display F23
Malfunction 
detection 
conditions 
Supposed 
causes
 
Troubleshooting 
'  
Be sure to turn off power switch before connect or disconnect connector, or 
else 
parts damage may be caused 
The current of the compressor is too high 
● The IPM Module is damaged; 
● The compressor is damaged; 
● Power supply voltage is too low or too high; 
ƵFaulty IPM module˗ 
ƵFaulty compressor˗ 
ƵFaulty power supply˗ 
YES
NO 
YES
 
IPM Module is damaged 
and needs replacing. 
Repair the power supply 
The system may have been over or under 
charged with gas, which can be judged through 
the system pressure. 
 
NO 
Electrify the machine again and 
turn it on with the remote 
controller, If malfunctions are 
reported before or upon the 
compressor being started up 
The compressor is started 
normally, but malfunctions are reported 
after it has run for some time. Check 
whether the power supply is too low or 
too high