Mitsubishi Electric PUMY-P200YKM2 Technical & Service Manual page 70

Check code
5201
(F5)
Abnormal points and detection methods
When the detected pressure in the high pressure sensor is 1 kgf/F [14.2
PSIG] or less during operation, the compressor stops operation and
enters into an anti-restart mode for 3 minutes.
When the detected pressure is 1 kgf/F [14.2 PSIG] or less 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.
●Diagnosis of defects
Make sure to turn the power OFF before connecting/disconnecting
any connectors, or replacing boards.
Check the wiring and connector connection.
Is there any abnormality such
as disconnection, looseness or
breakage?
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.
*For the pressure, refer to "8-8.HOW TO
CHECK THE COMPONENTS".
Is the detected pressure normal?
OCH675D
High pressure sensor (63HS) trouble
Diagnosis
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
circuit board
The black square (■) indicates a switch position.
63HS: High pressure sensor
Connect the wiring/connector properly.
Yes
Replace it in case of breakage.
Check the refrigerant circuit, and recharge
No
refrigerant after repairing the leakage.
The detected pressure in 63HS can be displayed by an
operation of SW1 on the outdoor controller board.
SW1 Setting Display on LED1, 2
ON
−99.9–999.9
OFF
4
1 2 3 5 6 7 8
No
70
Remedy
Unit
kgf/F
[PSIG]
Replace the 63HS.
Replace the outdoor multi
controller circuit board.