J4" Malfunction Of Heat Exchanger Gas Pipe Thermistor (R81, 82T) - Daikin REYQ72 Serveice Manual

SiUS39-602
2.26 "J4" Malfunction of Heat Exchanger Gas Pipe Thermistor
(R81, 82T)
J4
Remote
Controller
Display
Applicable REYQ72M, 96M
Models
Method of Malfunction is detected according to the temperature detected by heat exchanger gas pipe
thermistor.
Malfunction
Detection
Malfunction When the heat exchanger gas pipe thermistor is short circuited or open.
Decision
Conditions
Supposed
Causes
Troubleshooting
∗
1: Refer to thermistor resistance / temperature characteristics table on P.239.
Troubleshooting
Faulty heat exchanger gas pipe thermistor (R81, 82T)
Faulty outdoor unit PC board
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Is
the connector
for heat exchanger
gas pipe thermistor
connected to X37A on
outdoor unit PC
board (A1P)?
YES
Is the
resistance
measured after
removing the thermistor
(R81 or 82T) from outdoor
unit PC board normal?
(3.5 kΩ to
360 kΩ)
∗1
YES
Troubleshooting by Indication on the Remote Controller
NO
NO
Connect thermistor and operate
unit again.
Replace thermistor (R81 or 82T).
Replace outdoor unit PC board
(A1P).
(V3075)
157