J5" Indoor Unit: Malfunction Of Thermistor (R7T) For Liquid R-134A - Daikin ERSQ 011AAV1 Service Manual

ESIE09-08
3.28 "J5 " Indoor Unit: Malfunction of Thermistor (R7T) for
Liquid R-134a
J5
Remote Control
Display
Subcode 11
Applicable
All indoor units
Models
Method of Malfunction is detected from the temperature detected by the thermistor for liquid pipe.
Malfunction
Detection
Malfunction
When a short circuit or an open circuit in the thermistor for liquid pipe are detected.
Decision
Conditions
Supposed
Causes
Troubleshooting
∗ Refer to thermistor resistance / temperature characteristics table on P229.
Troubleshooting
Defect of thermistor (R7T) for liquid R134a
Defect of indoor unit PC board (A4P)
Be sure to turn off power switch before connecting or disconnecting connector,
otherwise parts may be damaged.
Caution
Connector of
the thermistor for
liquid pipe is connected to
X12A [3,4] of indoor
unit PC board
(A1P).
YES
Resistance
is normal
when measured
after disconnecting the
thermistor (R7T) from the
indoor unit PC board.
(3.5k ~360k )
YES
Troubleshooting by Indication on the Remote Controller
NO
Bad wire connection
value < -43.6˚C
NO
Faulty thermistor
value > 165˚C
Connect the thermistor and turn
on again.
Replace the thermistor (R7T).
Replace indoor unit PC board
(A4P).
167