Service manual

Si18-201 Troubleshooting - Outdoor Unit Related
Service Diagnosis 275
3.3.13 Faulty Discharge Thermistor
Outdoor Unit
Indication
J3
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
When the discharge temperature sensor became short-circuited or open.
Supposed
Causes
"
Faulty discharge temperature sensor
"
Faulty connectors connection of discharge temperature sensor
Troubleshooting
AB
1-10°C 117k
Ω
20°C67k
Ω
310°C40k
Ω
420°C25k
Ω
530°C16k
Ω
640°C10k
Ω
750°C7k
Ω
860°C5k
Ω
970°C3k
Ω
Disconnect the thermistor
connectors from outdoor unit
PC board and measure the
resistance of discharge
temperature sensor.
Replace thermistor or
thermistor assembly.
If insufficient contact is not
detected, replace outdoor
unit PC board.
YES
Is the resistance
normal referring to the table
below?
NO
(MF032)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.