J5" Indoor Unit: Malfunction Of Thermistor (R7T) For Liquid R-134A - Daikin ALTHERMA HT 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
All indoor units
Applicable
Models
Malfunction is detected from the temperature detected by the thermistor for liquid pipe.
Method of
Malfunction
Detection
When a short circuit or an open circuit in the thermistor for liquid pipe are detected.
Malfunction
Decision
Conditions
 Defect of thermistor (R7T) for liquid R134a
Supposed
 Defect of indoor unit PC board (A4P)
Causes
Troubleshooting
 Refer to thermistor resistance / temperature characteristics table on P239.
170
Be sure to turn off power switch before connect or disconnect
connector, or parts damage may be occured.
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
ESIE09-08B
Connect the thermistor and turn
on again.
Replace the thermistor (R7T).
Replace indoor unit PC board
(A4P).
Troubleshooting