Mitsubishi Heavy Industries ESA30E-25, Technical Manual

Page: 176 / 239

- -
'15 • HM-T-246
. Applicable Model
. Troubleshooting
All models
Diagnosis Countermeasure
Save the Mente PC data of
30 minutes before stopping
NO
Is the
connector of the
anomalous sensor
connected
properly?
YES
NO
Are
the characteristics
of sensor OK?
*3
YES
・
Check the operation
status and record it.
・
Check it occurs soon
after power ON or during
operation or during
stopping.
・
Chech sensing value
・
Compare the temperature
shown in menteP C data
to the acutal temperature
measured with
thermometer.
Insert the connector securely
Replace the hot water
temperature sensor for
unvented cylinder
(Tht- to -)
Replace the control P CB of
heat pump water heater
. E rror detection method
Detection of anomalously low
temperature (resistance) of hot
water temperature sensor for
unvented cylinder
. 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 - to -: Tht- to -,
Temperature (° C)
* Check several times to prove any poor connection
[Sensor temperature-resistance characteristics]
Hot water temperature sensor for unvented cylinder (Tht- to -)
Error code
Remote control:
7-segment display:
LED Green Red
Heat pump
water heater
Keep
flashing
Content
E *
E - to -
Anomaly of hot water temperature sensor for
unvented cylinder (Tht- to -)
*
00
0
0
0
0
0
0
0
0
0
0
-0 0 0 0 0 0 00
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