Mitsubishi Heavy Industries ESA30E-25, Technical Manual

Page: 180 / 239

- -
'15 • HM-T-246
* Check several times to prove any poor connection
[Sensor temperature-resistance characteristics]
P ower transistor temperature sensor (Tho-P )
Temperature (° C)
Error code
Remote control:
7-segment display:
LED Green Red
Heat pump
water heater
Keep
flashing
Content
E
E -
P owe transistor temperature sensor (Tho-P ) anomaly
-time
. Applicable Model
. Troubleshooting
All models
Diagnosis Countermeasure
NO
YES
Is the
connector of the
anomalous sensor
connected
properly?
Are
the characteristics
of sensor OK?
*3
NO
Save the Mente PC data of 30
minutes before stopping
YES
・
Check the operation
status and record it.
・
Check it occurs soon
after power ON or during
operation or during
stopping.
・
Check sensing value
・
Compare the temperature
shown in menteP C data
to the acutal temperature
measured with
thermometer.
Insert the connector
securely
Replace power transistor
temperature sensor
(Tho-P )
Replace the control P CB of
heat pump water heater
. E rror detection method
Detection of anomalously low
temperature (resistance) of
power transistor temperature
sensor.
(Tho-P )
. Condition of error displayed
Under the condition of 0° C or higher of
outdoor air temperature, if the sensor
detects disconnection for 0 seconds
continuously within 0 seconds after 0
minutes has elapsed since compressor
ON , it makes the compressor stopped.
After minutes, compressor restarts
automatically. And then if this error is
detected times within 0 minutes, it
makes error stop.
. P resumable cause
・
Broken sensor harness
or the internal wire of
sensing section (Check the
molded section as well)
・
Disconnection of sensor
harness connection
(connector)
・
Control P CB anomaly
N ote:
0 0 00 0 0 0 0
00
0
0
0
0
00
0
0
0
0
0
0
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