Mitsubishi Heavy Industries ESA30E-25, Technical Manual

Page: 171 / 239

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0
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'15 • HM-T-246
Error code
Remote control:
7-segment display:
LED Green Red
Heat pump
water heater
Keep
flashing
1-time
flash
Content
E
E
Current cut
. Applicable model
. Troubleshooting
All models
Diagnosis Countermeasure
*
Do you
have an inverter checker
for judging inverter
PCB anomaly?
YES
Save the Mente PC data of 30 minutes
before stopping
Reset the power source and restart operation
Turn the power source OFF and check
the 2nd layer of the control **
NO
NO
NO
NO
Is the
winding wire resistance and
the meggar check of motor insulation
of compressor
OK?
Is the
fan of heat pump water heater
rotating?
Is the
checked result of inverter
PCB OK?
Does E42 recur?
Measure
the resistance of power transistor module
(Does it short circuited?)
YES
Normal
Short circuited
YES
YES
YES
NO
* See checking method
on page 192
** As for how to addess the 2nd layer,
please refer to PCB replacement procedure
• Check the operation status
and record it.
• Is anomalous pressure
detected?
• Does the fan motor of
heat pump water heater
run?
Replace compressor
If necessary, replace
capillary tube of oil
separator and strainer as
well.
Rectify it according to the
troubleshooting procedure
of E
Restart operation under
the operating conditions
0 minutes before error
occurred as possible as you
can.
Wait and see
(If possible, collect
the operation data
continuously)
Replace power transistor
Replace inverter P CB
Replace power transistor
Check the short-circuit
of power transistor by
disconnecting the cables of
compressor.
Check the resistance of
P -U, P -V , P -W, N -U, N -V ,
N -W and P -N .
(See page 0 for details)
Replace inverter P CB
. E rror detection method
Detect the anomalous output
current of inverter
with the sensor built in the
power transistor
. Condition of error displayed
If the error signal (A or
higher output current of
inverter) is detected times
within minutes.
. P resumable cause
• Compressor anomaly
• Leak of refrigerant
• P ower transistor anomaly
• Anomalous power votage to
the inverter P CB
• Fan motor anomaly
N ote:
Despite the insulation failure of compressor, there is a case of compressor failure. If the same error recurs after replacement
of electrical components, please replace compressor.
If the same error does not reappear, continue to get data with Mente P C.
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