Check code
Abnormal points and detection methods
Causes and check points
Abnormal if TH4 detects to be open/short.
(The open/short detection is disabled for 10 minutes after compressor
starts, during defrosting operation, or for 10 minutes after returning from
the defrosting operation.)
Open: 3 [37°F] or less
Short: 217 [423°F] or more TH4: Thermistor <Compressor>
Disconnection or contact failure of connectors
Characteristic defect of thermistor
Defective outdoor multi controller circuit board
●Diagnosis of defectives
Make sure to turn the power OFF before connecting/disconnecting
any connectors, or replacing boards.
Diagnosis
Remedy
−99.9–999.9
5101
(U3)
Compressor temperature thermistor (TH4) open/short
The black square (■) indicates a switch position.
<Detected in outdoor unit>
No
Yes
Yes
Yes
No
No
Is there any abnormality such
as a disconnection, looseness or
breakage?
Is the detected resistance normal?
Is the detected temperature normal?
Connect the wiring/connector properly.
Replace the connector in case of a
breakage.
Replace the thermistor.
Replace the outdoor multi controller circuit
board
(Malfunction of thermistor circuit).
No abnormality
(A connector contact failure is suspected.)
Check the wiring and connector connection of TH4.
Disconnect the connector to check the
resistance of TH4 using a tester.
Check a temperature of TH4.
The detected temperature of TH4 can be displayed
by an operation of SW1 on the outdoor multi
controller circuit board.
SW1 Setting
ON
OFF
Display on LED1, 2
Unit
−99.9–999.9
:
4
1 2
5 6 7 8
3
76
77
OCH632A
Summary of Contents for PUMY-P112VKM3
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