Check code
5202
Low-pressure sensor (63LS) trouble
Abnormal points and detection methods Causes and check points
When the detected pressure in the low-pressure sensor is -2.3kgf/F
or less, or 23.1kgf/F or more during operation, the compressor stops
operation with a check code <5202>.
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 low-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.
63LS: Low-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 63LS.
Replace the outdoor controller board.
Check the wiring and connector
connection.
Check an internal pressure of the
refrigerant circuit.
Check the detected pressure in 63LS, then
compare it with the internal pressure.
ON
OFF
12345678
SW1 Setting
Display on LED1,2
Unit
-99.9 999.9 kgf/cm²
*1k
f/
F =14.22PSIG
The detected pressure in 63LS can be displayed by an
operation of SW1 on the outdoor controller board.
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