Is power
supply voltage OK?
Is the
pressure balance at
starting OK?
Is the
insulation resistance
and coil resistance of
compressor
OK ?
Is power transistor
module OK?
NO (Inverter PCB is defective)
Is the
output of inverter
checker OK ?
Does it start?
Does
compressor startup?
Save data for 30 minutes before stoopping in Mente PC
Try to restart several
times
In case that the compressor
does not start at all and no
sound or vibration is heard
Start up by disconnecting
connector of outdoor
fan motor
Note : Several times restarting
may recover it, because liquid
refrigerant migrated in the
compresser is discharged from
the compressor.
YES
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
Check and save the data of
operating conditions
Replace outdoor fan motor
Check power supply
voltage
Check refrigerant amount
and refrigerant circuit
Repalce compressor
Replace inverter PCB
Replace inverter PCB
Repalce compressor
2. Error detection method
If it fails to change over to the
operation for rotor detection
of compressor motor (If the
compressor speed cannot
increase 11Hz or higher)
3
.
Condition of error displayed
If compressor fails to startup for
20 times (10 patterns x 2 times).
(It is availabel to reset by
remote controller after 3
minutes delay)
4. Presumable cause
•
Faulty fan motor
•
Faulty outdoor control PCB
•
Faulty inverter PCB
•
Anomalous power supply
voltage
•
Nonconformity of refrigerant
amount and refrigerant circuit
•
Faulty compressor
Note: Insulation resistance
• The unit is left for long period without power supply or soon after installation, insuration resistance may decrease to
several MΩ or lower due to the liquid refrigerant migrated in the refrigerant oil in compressor. If the electric leakage
breaker is activated due to low insulation resistance, check followins.
➀ Check whehter the insulation resistance can recover or not, ater 6 hours has passed since power ON.
(By energize the crankcase heater, liquid refrigerant migrated in the refrigerant oil in compressor can be evaporated)
➁ Check whether the electric leakage breake conforms to high-hermonic specifications
(As KXE6 units has inverter, in order to prevent from improper operation, be sure to use high-hermonic one.)
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