Check code
Abnormal if TH3 detects to be open/short.
(The open/short detection is disabled during 10 sec. to 10 min. after
compressor starts, during defrosting operation, or for 10 min. after
returning from the defrosting operation.)
Open: −40 [−40
-
F] or less
Short: 90 [194
-
F] or more
TH3: Thermistor <Outdoor liquid pipe>
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
Abnormal points and detection methods
Causes and check points
5105
Outdoor liquid pipe temperature thermistor (TH3) open/short
The black square (■) indicates a switch position.
SW1 Setting
ON
OFF
Display on LED1, 2
Unit
−99.9–999.9
:
4
1 2
5 6 7 8
3
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 it 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 TH3.
Disconnect the connector to check the
resistance of TH3 using a tester.
Check a temperature of TH3.
The detected temperature of TH3 can be displayed by an
operation of SW1 on the outdoor multi controller circuit board
65
OCH575
Summary of Contents for PUMY-P200YKM
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