Daikin Super Multi Plus E-Series - Malfunction of Thermistor (R7 T) for Outdoor Unit Liquid Pipe

Troubleshooting for Outdoor Unit SiEN18-622
374 Troubleshooting
7.13 Malfunction of Thermistor (R7T) for Outdoor Unit Liquid
Pipe
Remote Control
Display
J7
Applicable
Models
AII outdoor unit models
Method of
Malfunction
Detection
Malfunction is detected from the temperature detected by the liquid pipe thermistor.
Malfunction
Decision
Conditions
When a short circuit or an open circuit in the heat exchange thermistor is detected.
Supposed
Causes
 Defect of thermistor (R7T) for outdoor unit liquid pipe
 Defect of outdoor unit PCB (A1P)
Troubleshooting
∗ Refer to thermistor resistance / temperature characteristics table on P407.
(V3074)
Caution
NO
NO
Replace the thermistor (R7T).
YES
YES
Connector
is connected to outdoor
unit PC board
(A1P).
Replace outdoor unit PC board
(A1P).
Connect the thermistor and turn
on again.
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Resistance
is normal when
measured after
disconnecting the thermistor
(R7T) from the outdoor
unit PC board.
(3.5kƙ ~
360kƙ)