Daikin REYQ72 User Manual

Troubleshooting by Indication on the Remote Controller SiUS39-602
162 Troubleshooting
2.31
“
J9
”
Malfunction of Sub-cooling Heat Exchanger Gas
Pipe Thermistor (R5T)
Remote
Controller
Display
J9
Applicable
Models
REYQ72M, 96M
Method of
Malfunction
Detection
Malfunction is detected according to the temperature detected by sub-cooling heat exchanger
gas pipe thermistor.
Malfunction
Decision
Conditions
When the sub-cooling heat exchanger gas pipe thermistor is short circuited or open.
Supposed
Causes

Faulty sub-cooling heat exchanger gas pipe thermistor (R5T)

Faulty outdoor unit PC board
Troubleshooting
∗
1: Refer to thermistor resistance / temperature characteristics table on P.239.
(V3075)
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
(R5T) from outdoor unit PC
board normal?
(3.5 kΩ to
360 kΩ)
∗1
Replace outdoor unit PC board
(A1P).
Connect thermistor and operate
unit again.
NO
NO
Replace thermistor (R5T).
YES
YES
Is
the connector
for sub-cooling heat
exchanger gas pipe
thermistor connected to
X37A on outdoor
unit PC board
(A1P)?

Daikin REYQ72 Specifications

General

Brand	Daikin
Model	REYQ72
Category	Air Conditioner
Language	English