Service manual

Si18-201 Troubleshooting - Outdoor Unit Related
Service Diagnosis 279
3.3.17 Faulty BP Liquid Pipe Thermistor
Outdoor Unit
Indication
J8
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
When the BP liquid pipe temperature sensor became short-circuited or open.
Supposed
Causes
"
Faulty BP liquid pipe temperature sensor
"
Faulty connectors connection of BP liquid pipe 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
Set the rotary switch to [01]
and specify the corresponding
BP unit.
Replace thermistor or
thermistor assembly.
If insufficient contact is not
detected, replace the
corresponding PC board.
YES
Is the resistance
normal referring to the
table below?
NO
(MF036)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Disconnect the thermistor
connectors from the
corresponding BP PC borad
and measure the resistance of
liquid tube temperature sensor.