Compressor Startup Failure - Mitsubishi Electric FDF100VSXVD Technical Manual

Error code
Indoor control PCB
E59
Remote controller:
Outdoor control PCB
1. Applicable model
All models
2. Error detection method
When it fails to change over to
the operation for rotor position
detection of compressor motor
(If the compressor speed cannot
increase 11Hz or higher)
3. Condition of Error displayed
If the compressor fails to startup for
20 times (10 patterns x 2 times)
continuously.
4. Presumable cause
• Outdoor fan motor anomaly
• Outdoor control PCB anomaly
• Inverter PCB anomaly
• Anomalous power supply
voltage
• Insufficient or Excessive
refrigerant amount
• Faulty component for
refrigerant circuit
• Compressor anomaly
(Motor or bearing)
Note : Insulation resistance
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 followings.
Check whether the insulation resistance can recover or not, after 6 hours has passed since power ON.
(By energize the crankcase heater, liquid refrigerant migrated in the refrigerant oil in compressor can be evaporated)
(As INV PAC units has inverter, in order to prevent from improper operation, be sure to use the breaker of high-harmonic type)
L E D G r een
Keeps flashing
Keeps flashing
Outdoor
Yellow or Red L E D
inverter
Stays off or 4 times flash
PCB
5. Troubleshooting
In case that the compressor
does not start at all and no
sound or vibration exists
For
3 phase models
Is the
pressure equalized
at starting OK?
YES
Is the
insulation resistance
and coil resistance of
compressor OK?
YES
A
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Red
Content
Stays OFF

Compressor startup failure (1/2)

1 time flash
G r een
Keeps flashing
Diagnosis
Is
power supply voltage
OK?
For Single phase models
YES
Is DC15V
detected between and
on CNI3?
NO
Is DC15V
detected after disconnecting
outdoor fan motor?
NO
Replace control PCB
Can compressor
startup?
NO
194
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'11 • PAC-T-160
Countermeasure
Check the power supply
NO
voltage and correct it
Note (1): How to check voltage
at CN13 See E51
(1)
Replace inverter PCB
YES
If not solved yet, replace
(2)
Note (2): Under anomalous conditions,
the voltage becomes less than 14VDC
(2)
Replace outdoorfan motor
YES
OK
YES
Check refrigerant amount
NO
and refrigerant circuit
Replace compressor
NO