Check code
2503
<Drain sensor models>
Drain sensor abnormality
Abnormal points and detection methods
Causes and check points
<Drain sensor models>
Abnormal if drain sensor detects to be short/open .
Contact failure of connector CN31
Characteristic defect of thermistor
Breakage or contact failure of drain sensor wiring.
Replace the indoor controller board.
●Diagnosis of defectives
Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards
Diagnosis
Remedy
Yes
Temperature(°C)
Resistance(k )
0
20
−
20
40
60
80
0
2
1
3
4
5
6
7
8
9
10
<Drain Sensor>
<How to check the resistance>
Disconnect the connector for drain sensor from the indoor controller board to check the
resistance using a tester.
Temperature
Resistance
0
[32
-
F]
6.0 kΩ
10
[50
-
F]
3.9 kΩ
20
[68
-
F]
2.6 kΩ
25
[77
-
F]
2.2 kΩ
30
[86
-
F]
1.8 kΩ
40
[104
-
F]
1.3 kΩ
60
[140
-
F]
0.6 kΩ
No
Yes
No
Check the drain sensor connector (CN31)
for disconnection or looseness.
[Drain sensor models]
Is it connected normally?
Is the resistance of thermistor normal?
Connect it properly.
Turn the power back ON, then check the
operation.
Replace the drain sensor.
Replace the indoor controller board.
52
OCH575
Summary of Contents for PUMY-P200YKM
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