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

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