Service manual

SiE18-201 Troubleshooting - Outdoor Unit Related
Service Diagnosis 225
3.3.14 Faulty of Suction Thermistor
Outdoor Unit
Indication
J5
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
When the suction temperature sensor became short-circuited or open.
Supposed
Causes
 Faulty suction temperature sensor
 Faulty connectors connection of suction temperature sensor
Troubleshooting
AB
1 -10˚C 117kΩ
2 0˚C 67kΩ
3 10˚C 40kΩ
4 20˚C 25kΩ
5 30˚C 16kΩ
6 40˚C 10kΩ
7 50˚C 7kΩ
8 60˚C 5kΩ
9 70˚C 3kΩ
Disconnect the thermistor
connectors from outdoor unit
PC board and measure the
resistance of suction
temperature sensor.
Replace thermistor or
thermistor assembly.
If insufficient contact is not
detected, replace outdoor
PC board.
YES
Is the resistance
normal referring to the
table below?
NO
(MF033)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.