Specifications

SiBE18-821 Troubleshooting for Outdoor Unit
Troubleshooting 317
7.14 Malfunction of Subcooling Heat Exchanger Thermistor
(R6T)
Remote
Controller
Display
J9
Applicable
Models
AII outdoor unit models
Method of
Malfunction
Detection
Malfunction is detected according to the temperature detected by subcooling heat exchanger
gas pipe thermistor.
Malfunction
Decision
Conditions
When the subcooling heat exchanger gas pipe thermistor is short circuited or open.
Supposed
Causes

Faulty subcooling heat exchanger gas pipe thermistor (R6T)

Faulty outdoor unit PCB
Troubleshooting
∗
Refer to “Thermistor Resistance / Temperature Characteristics” table on P349.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Is the
resistance
measured after
removing the
thermistor (R6T) from
outdoor unit PC board
normal?
(3.5 kΩ to
360 kΩ)
Replace outdoor unit PC
board (A1P).
(Q0563)
Replace thermistor (R6T).
NO
YES
YES
Is the
connector for
subcooling heat
exchanger gas pipe
thermistor connected to
outdoor unit PC
board (A1P)?
Connect connector and
operate unit again.
NO