Mitsubishi Heavy Industries ESA30E-25, Technical Manual

Page: 165 / 239

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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
Discharge pipe
temperature anomaly
. Applicable model
. Troubleshooting
All models
Diagnosis Countermeasure
Is there any
leak of refrigerant?
YES
NO
Is the
refrigerant amount charged
properly?
NO
NO
Is the
sensor connector inserted
to the connector on control
PCB properly?
YES
YES
Is there any anomaly of
discharge pipe temperature sensor?
YES
NO
Does
the valve of gas injection
circuit (SVINJ1) activate
normally?
NO
NO
Do
EEVH1 and EEVH2 activate
normally?
YES
NO
Is water circuit normal?
(Is high pressure normal?)
YES
YES
Specify the leak point and
rectify it
Check the refrigerant
amount and charge
additionally
Check the connector and
wirng harness and rectify
it.
Check the output and
replace the sensor
Check the coil of solenoid
valve or the sensor and
replace it
Check the body of E E V
and the coil activation and
the sensor and then replace
it.
Rectify the water circuit
It might be compressor
failure.
P lease correct the data and
ask further investigation to
MHI.
. E rror detection method
If discharge pipe temp sensor
detects anomalous high
temperature.
. Condition of error displayed
If discharge pipe temperature
sensor detects ° C or higher
for seconds or compressor
stops times within 0 minutes.
. P resumable cause
• Discharge pipe temperature
sensor anomaly
• Control P CB anomaly
• Leakage of refrigerant
• Lack of air flow volume
• Injection circuit malfunction
• E xcessive suction superheat
due to malfunction of E E V
operation.
N ote:
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