SiBE37-701_B Troubleshooting by Indication on the Remote Controller
Troubleshooting 312
3.34
“
J8
”
Outdoor Unit: Malfunction of Liquid Pipe Thermistor 2
(R7T or R15T)
Remote
Controller
Display
J8
Applicable
Models
REYQ8P~48P
Method of
Malfunction
Detection
Malfunction is detected according to the temperature detected by liquid pipe thermistor.
Malfunction
Decision
Conditions
When the liquid pipe thermistor is short circuited or open circuited.
Supposed
Causes
Faulty liquid pipe thermistor 2 (R7T or R15T)
Faulty outdoor unit PCB
Defect of thermistor connection
Troubleshooting
∗
Refer to “Thermistor Resistance / Temperature Characteristics” table on P450.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Is the connector
for liquid pipe
thermistor
connected to
X30A on outdoor
unit PCB
(A1P)?
NO
Connect the connector and
operate the unit again.
Confirm which thermistor is
abnormal using outdoor unit
"monitor mode".
(Refer to P.255~P.256)
Is the resistance
measured after
removing the thermistor
(R7T or R15T) from
outdoor unit PCB
normal? (1.8k
Ω
to
800k
Ω
)
YES
NO
YES
Replace the thermistor (R7T or
R15T).
Replace the outdoor unit PCB
(A1P).
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