Mitsubishi Heavy Industries ESA30E-25, Technical Manual

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'15 • HM-T-246
. Applicable model
. Troubleshooting
All models
Diagnosis Countermeasure
• Check the operation status
and record it.
• Check the sensing value
of high pressure when
H- is activated
• Check the activated
pressure of high pressure
switch (H-) with
the sensing value of high
pressure sensor.
Check the cause of F
blown.
Check wiring mistake and
short circuit of AC00V line.
E specially check wiring
mistake of optional parts
CWFV and V .
After checking, replace fuse F.
High pressure sensor anomaly
is suspected.
After restarting operation, check
the high pressure sensor itself.
(If the high pressure sensor
has anomaly, replace it)
Connect the connector securely.
Rectify the disconnection of
H wire.
If it is a fault of connector
or disconnection of wiring
harness,
rectify it.
Since the wrong assembling
of high pressure switch is
suspected, check it as well.
Replace control P CB
Check the disruption of feed
water.
Secure a supply of feed
water.
Clear the clog
[Check items]
Gas cooler, Strainer,
Lack of water,
Clogging of gas cooler
. E rror detection method
When high pressure switch
H- is activated
. Condition of error displayed
• High pressure increases to
MP a or higher.
• H- is activated times
within 0minutes.
• H- is activated for
0minutes continuously.
. P resumable cause
• Short-circuit of airflow at air
heat exchanger/Disturbance
of airflow/Clogging filter/Fan
motor anomaly
• Control P CB anomaly
• Disconnection of high
pressure switch connector
• Breakage of high pressure
switch harness/Disconnection
of connector
• Closed service valves
• High pressure sensor anomaly
N ote:
If the same error does not reappear, continue to get data with Mente P C.
YES
NO
NO
NO
7-segment : Check C40
NO
YES
Is the fuse F2 blown?
Does the
sensing value of high
pressure sensor show 14MPa?
(Is 63H1-1 normal?)
Is there loose
connection of 63H1at the
connector on the PCB
or disconnection of
63H1wire ?
Does the
unit stop, when the high
pressure increases
to 14MPa?
NO
Does the refrigerant
circuit get clogged?
YES
NO
YES
YES
YES
Is the
feed water OK?
YES
NO
YES
Save the data 30 minutes
before stopping into the
Mente PC
Is 63H1-1 activated at
14MPa or higher?
s)STHEFEED
water pressure
100kPa or higher?
s
Was air purge done?
s
Does water stoppage occur?
Is 63H1-1normal?
Are the connector and the
wiring harness of
63H1-1OK?
NO
Error code
Remote control:
7-segment display:
LED Green Red
Heat pump
water heater
Keep
flashing
1-time
flash
Content
E 0
E 0
High pressure anomaly
(H- activated)
* From the viewpoint of safety, pressure cannot be
measured with pressure gauge during operation.
P lease check pressure during stopping operation
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