NO
NO
Is power
supply voltage
OK?
Is
the pressure balance
at starting OK?
NO
NO
Is the
insulation resistance
and coil resistance of
compressor OK ?
Is power transistor
module OK?
Try to startup
several times
Does it start?
NO
NO
Is
the output of inverter
checker OK ?
Compressor does not start at all.
Neither noise nor vibration cannot be heard
Disconnect the outdoor fan motor
connector and try to startup
Does
compressor
startup?
YES
Note: Several times restarting
may resolve it, because migrated
liquid refrigerant in the
compresser is discharged from
the compressor.
YES
YES
YES
YES
YES
NO
Replace outdoor fan motor
Check power supply
voltage
Check refrigerant amount
and refrigerant circuit
Repalce compressor
Defective outdoor main
PCB
➞
Replace
Defective outdoor main
PCB
➞
Replace
Repalce compressor
2. Error detection method
If it fails to change over to the
rotor detection operation of
compressor motor
3.
Condition of Error displayed
If compressor fails to startup for
42 times
4. Presumable cause
• Faulty outdoor fan motor
• Faulty outdoor main PCB
• Anomalous power supply
voltage
• Improper refrigerant amount
and refrigerant circuit
• Faulty compressor (Motor
bearing)
Note: Insulation resistance
•
The unit is left for long period without power supply or soon after installation, migrated liquid refrigerant may dissolve in the refrigerant oil in the compressor.
In such case insulation resistance decreases upto several MΩ or lower. If the electric leakage breaker is activated due to low insulation resistance,
check followings.
➀ Check whether the electric leakage breake conforms to high-hermonic specications
(As units has inverter, in order to prevent from improper operation, be sure to use high-hermonic one.)
To Next Page
Loading...
Need help?
General
