Check code
5201
High-pressure sensor (63HS) trouble
Abnormal points and detection methods Causes and check points
When the detected pressure in the high-pressure sensor is 1kgf/F or
less during operation, the compressor stops operation and enters into
an anti-restart mode for 3 minutes.
When the detected pressure is 1kgf/
F
immediately before restarting,
the compressor falls into an abnormal stop with a check code <5201>.
For 3 minutes after compressor restarting, during defrosting operation,
and for 3 minutes after returning from defrosting operation, above
mentioned symptoms are not determined as abnormal.
Defective high-pressure sensor
Decrease of internal pressure caused by gas
leakage
Disconnection or contact failure of connector
Malfunction of input circuit on outdoor controller
board
●Diagnosis of defectives
Make sure to turn the power OFF before connecting/disconnecting
any connectors, or replacing boards.
Diagnosis Remedy
The black square (■) indicates a switch position.
63HS: High-pressure sensor
No
Yes
Yes
No
No
Is there any abnormality such
as a disconnection, looseness or
breakage?
Is the detected internal pressure
normal?
Is the detected pressure normal?
Connect the wiring/connector properly.
Replace it in case of a breakage.
Check the refrigerant circuit, and refi ll
refrigerant after repairing the leakage.
Replace the 63HS.
Replace the outdoor controller board.
Check the wiring and connector connection.
Check an internal pressure of the
refrigerant circuit.
Check the detected pressure in 63HS,
then compare it with the internal pressure.
ON
OFF
12345678
SW1 Setting
Display on LED1,2
Unit
0.0 711.0 PSIG
The detected pressure in 63HS can be displayed by an
operation of SW1 on the outdoor controller board.
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