Mitsubishi Electric CITY MULTI PUMY-P200YKM3, Руководство по обслуживанию

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OCH791 _54
5202 (F3): Low pressure sensor (63LS) trouble
Abnormal points and detection methods
• The detected pressure in the low pressure sensor is
−2.3kgf/cm
2
[-33 PSIG] or less, or 23.1kgf/cm
2
[329
PSIG] or more during operation, the compressor stops
operation with error code 5202.
• 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 low 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 refill refrigerant
after repairing the leakage.
Replace the 63LS.
Replace the outdoor multi controller circuit
board.
Check the wiring and connector connection.
Check the internal pressure of the refrigerant
circuit.
Check the detected pressure in 63LS, then
compare it with the internal pressure.
The detected pressure in 63LS 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