Service manual

Troubleshooting - Outdoor Unit Related Si18-201
280 Service Diagnosis
3.3.18 Faulty BP Gas Pipe Thermistor
Outdoor Unit
Indication
J9
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
When the BP gas pipe temperature sensor became short-circuited or open.
Supposed
Causes
"
Faulty BP gas pipe temperature sensor
"
Faulty connectors connection of BP gas 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
(MF037)
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 board
and measure the resistance of
gas pipe temperature sensor.