Mitsubishi Heavy Industries ESA30E-25, Technical Manual

Page: 168 / 239

- -
'15 • HM-T-246
. Applicable model
. Troubleshooting
All models
Diagnosis Countermeasure
Is the
connector of the anomalous
sensor connected
properly?
NO
YES
Save the Mente PC data of 30 minutes
before stopping
NO
Are
the characteristics
of sensor OK?
*3
YES
*3 Check several times to prove any poor connection
• 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 the temperature
sensor (Tho-D and/or
Tho-M)
Replace the control P CB of
heat pump water heater
. E rror detection method
Detection of anomalously low
temperature (resistance) of
Tho-D and/or Tho-M
. Condition of error displayed
If the sensor detects
anomalously low temperature
for 0 seconds continuously
after power ON .
Or if the sensor detects
anomalously low temperature
for 0 seconds continuously
during normal operation after
minutes has elapsed since
compressor ON .
. 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:
* E -: Tho-D, E -: Tho-M
[Sensor temperature-resistance characteristics]
Discharge pipe temperature sensor (Tho-D)
Temperature (° C) Temperature (° C)
Error code
Remote control:
7-segment display:
LED Green Red
Heat pump
water heater
Keep
flashing
*2
Content
E *
E -,
Discharge pipe temperature sensor (Tho-D) anomaly
Intermediate receiver inlet temperature sensor (Tho-M) anomaly
Intermediate receiver inlet temperature sensor (Tho-M)
00
00
00
000
00
00
00
00
00
00
00
00
00
0
-0 -0 0 0 0 0 0 0 0 0
00
0
0
0
0
0
0
0
0
0
0
-0 0 0 0 0 0 00
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