YES
YES
NO
Save data for 30 minutes before stopping in Mente PC
Connect a pressure gauge and
restart operation.
YES
YES
NO
YES
NO
Was 63H1 activated at
4.15MPa or higher?
Does the
sensed value of high pressure
thermistor show 4.15MPa?
(Normal?)
Are the
connector and/or sensor
wire OK?
NO
Is the
operation valve
closed?
NO
Does it stop
at 4.15MPa of gauge
pressure?
Is there any
clogging in the refrigerant
system?
YES
NO
Check and save the data of
operating condition
Check the sensed value of
high pressure thermistor when
the 63H1 is activated
Check whether the high
pressure switch is activated
at the sensed value of high
pressure thermistor.
Failure of high pressure
thermistor is suspected.
Check high pressure
thermistor itself according
to the troubleshooting
of E54 (P360) (If it is
defective, replace high
pressure sensor.)
If the thermistor
connector is defective
or the thermistor wire is
disconnected, correct it.
Also check whether the
high pressure switch is
properly mounted or not.
Open operation valve.
Restart operation and check
it, as much as possible,
under the operating
conditions for 30 minutes
before error occurred.
Replace outdoor control
PCB.
Remove clogging.
Check items (condenser
side):
• Clogged filter
• Airflow volume (Outdoor
fan motor)
• Short-circuit
2. Error detection method
High pressure switch 63H1-1 is
activated
3
.
Condition of error displayed
• If high pressure exceeds
4.15MPa
• If 63H1 is activated 5 times
within 60 minutes
• If high pressure is kept at
4.15MPa for 60 minutes
4. Presumable cause
• Short circuit at condenser
heat exchanger/Disturbance
of air flow/Clogging filter/
Breakdown of outdoor fan
motor
• Disconnection of high
pressure switch connector
and/or switch harness
• Closed operation valve
• Defective high pressure sensor
Note: Unless it is reproduced, connect the maintenance PC and continue to collect data.
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