Mitsubishi Heavy Industries SRK100VNXWZRF Service Manual page 146

Error code
Remote control: E59
1. Applicable model
Model FDC100VNP-W
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 unit PCB
• Anomalous power source
voltage
• Improper refrigerant amount
and refrigerant circuit
• Faulty compressor (Motor
bearing)
Note: Insulation resistance
• The unit is left for long period without power source or soon after installation, migrated liquid refrigerant may dissolve in the refrigerant oil in the compressor.
In such case insulation resistance decreases upto several MW or lower. If the electric leakage breaker is activated due to low insulation resistance,
check followings.
➀ Check whehter the insulation resistance can recover or not, after 6 hours has passed since power ON.
(By energize the crankcase heater, migrated liquid refrigerant in the refrigerant oil in compressor can be evaporated.)
➁ Check whether the electric leakage breaker conforms to high-harmonic specifications.
(As units has inverter, in order to prevent from improper operation, be sure to use high-harmonic one.)
RUN light TIMER light Content
Indoor
2-time
display
ON
flash
5. Troubleshooting
Diagnosis
Compressor does not start at all.
Neither noise nor vibration cannot be heard.
Does
compressor
startup?
NO
Is power
source voltage
OK?
YES
Is
the pressure balance
at starting OK?
YES
Is the
insulation resistance and
resistance between terminals (1)
of compressor OK ?
(1) 0.724Ω or more at 20°C (Model FDC100VNP-W)
YES
Is power transistor
module OK?
YES
Is
the output of inverter
checker OK ?
YES
Try to startup
several times.
Does it start?
145
-
Compressor startup failure
(Model FDC100VNP-W only)
Disconnect the outdoor fan motor
connector and try to startup.
YES
NO
NO
NO
NO
NO
Note: Several times restarting
may resolve it, because
migrated liquid refrigerant
in the compressor is
discharged from the
compressor.
NO
-
'22 • PAC-SM-422
Countermeasure
Replace outdoor fan motor.
Check power source
voltage.
Check refrigerant amount
and refrigerant circuit.
Repalce compressor.
Defective outdoor unit
PCB➞Replace.
Defective outdoor unit
PCB➞Replace.
Repalce compressor.