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5201 (F5): High pressure sensor (63HS) trouble
Abnormal points and detection methods
• The detected pressure in the high pressure sensor is 14
psig (1kgf/cm
stops operation and enters into an anti-restart mode for
3 minutes.
• The detected pressure is 14 psig (1kgf/cm
immediately before restarting, the compressor falls into
an abnormal stop with error code 5201.
• For 3 minutes after compressor restarting, during de-
frosting operation, and for 3 minutes after returning from
defrosting operation, above mentioned symptoms are
not determined to be abnormal.
Diagnosis of failure
Check the wiring and connector connection.
Is there any abnormality such as
disconnection, looseness or break-
age?
Check an internal pressure of the refrigerant
circuit.
Is the detected internal pressure
normal?
Check the detected pressure* in 63HS, then
compare it with the internal pressure.
Is the detected pressure normal?
*For the pressure, refer to "How to check the components".
OCH800A_65
2
) or less during operation, the compressor
Yes
No
No
Yes
No
Yes
Causes and checkpoints
• Defective high pressure sensor
• Decrease of internal pressure caused by gas leakage
• Disconnection or contact failure of connector
• Malfunction of input circuit on outdoor multi controller
2
) or less
circuit board
Connect the wiring/connector properly.
Replace it in the case of breakage.
Check the refrigerant circuit, and recharge
refrigerant after repairing the leakage.
The detected pressure in 63HS can be displayed by an
operation of SW1 on the outdoor multi controller circuit board.
SW1 Setting
Display on LED1,2
Unit
ON
-99.9–999.9
psig
OFF
1 2 3 4 5 6 7 8
Replace the 63HS.
Replace the outdoor multi controller circuit board.
The black square (■) indicates a switch position.
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