Compressor Startup Failure (Cm1) - Mitsubishi Heavy Industries KX6 series Service Manual

Error code
E59
Remote controller:
E59-1
7-segment display:
1. Applicable model
Outdoor unit
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
• Anomalous voltage of power
supply
• Anomalous components for
refrigerant circuit
• Inverter PCB anomaly
• Loose connection of
connector or cable
• Compressor anomaly (Motor
or bearing)
Note: If the error does not recur, connect the Mente PC and continue to collect data.
LED Green Red
Keeps flashing Stays Off
Indoor
Keeps flashing 1 time flash
Outdoor
5. Troubleshooting
Diagnosis
Save data for 30 minutes before stopping in Mente PC
Check the data for 30 minutes before stopping
Is
power supply voltage
OK?
YES
Is the
pressure equalized
during 3-minute delay
before startup?
YES
Is there
any loose connection
or breakage of cable
connected to the terminal
of the compressor?
YES
Under the condition of no pressure difference,
startup by test operation mode
Is it
the unit with one
compressor?
YES
Can startup?
NO
Is there
any output of
inverter?
94
–
Content

Compressor startup failure (CM1)

NO
specification of power supply
voltage
AC220V
NO
NO
NO
YES
YES
NO
–
'10 • KX-SM-148
Countermeasure
Check and save the data of
operating conditions
Check the power supply
voltage and correct it
Check the version No. of
software (Is it latest?)
Check whether the solenoid
valve SV6 at the exit of oil
separator is open during
compressor stopping.
(Is the pressure equalized?)
Replace the cable
(If there is a problem on
the terminal of compressor,
replace the compressor
Check the Model
Wait and see
Replace compressor
Replace inverter PCB or
power transistor module.
(Check 15V on the outdoor
control PCB and check
power transistor by inverter
checker.
If the power transistor is
OK, replace inverter PCB)