Troubleshooting by Indication on the Remote Controller ESIE09-08A
180 Troubleshooting
3.29 “J5 ” Indoor Unit: Malfunction of Thermistor (R7T) for Liquid
R-134a
Remote Control
Display
J5
Subcode 11
Applicable Models All indoor units
Method of
Malfunction
Detection
Malfunction is detected from the temperature detected by the thermistor for liquid pipe.
Malfunction
Decision Conditions
When a short circuit or an open circuit in the thermistor for liquid pipe are detected.
Supposed Causes Defect of thermistor (R7T) for liquid R134a
Defect of indoor unit PC board (A4P)
Troubleshooting
Refer to thermistor resistance / temperature characteristics table on P251.
Caution
Be sure to turn off power switch before connecting or disconnecting connector,
otherwise parts may be damaged.
Resistance
is normal
when measured
after disconnecting the
thermistor (R7T) from the
indoor unit PC board.
(3.5k
~360k )
Replace indoor unit PC board
(A4P).
Connect the thermistor and turn
on again.
NO
NO
Replace the thermistor (R7T).
YES
YES
Connector of
the thermistor for
liquid pipe is connected to
X12A [3,4] of indoor
unit PC board
(A1P).
Bad wire connection
value < -43.6˚C
Faulty thermistor
value > 165˚C
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