OCH791 _53
5201 (F5): High pressure sensor (63HS) trouble
Abnormal points and detection methods
• The detected pressure in the high pressure sensor is
1kgf/cm
2
[14PSIG] or less during operation, the com
-
pressor stops operation and enters into an anti-restart
mode for 3 minutes.
• The detected pressure is 1kgf/cm
2
[14PSIG] or less
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.
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
circuit board
The black square (■) indicates a switch position.
Diagnosis of failure
Connect the wiring/connector properly.
Replace it in the case of breakage.
Check the refrigerant circuit, and recharge
refrigerant after repairing the leakage.
Replace the 63HS.
Replace the outdoor multi controller circuit 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.
The detected pressure in 63HS can be displayed by an
operation of SW1 on the outdoor multi controller circuit board.
Is there any abnormality such as
disconnection, looseness or break
-
age?
Is the detected internal pressure
normal?
Is the detected pressure normal?
ON
OFF
1 2 3 4 5 6 7 8
SW1 Setting
Display on LED1, 2
Unit
–99.9–999.9
kgf/cm
2
Yes
No
No
Yes
Yes
No
*For the pressure, refer to “How to check the components”.
