J9" Outdoor Unit: Malfunction Of Thermistor (R4T) - Daikin ERQ Service Manual

ESIE09-05
J9
3.28 " " Outdoor Unit: Malfunction of Thermistor (R4T)
J9
Remote
Controller
Display
Applicable
ERQ 125 ~ 200 A7V1
Models
Method of Malfunction is detected according to the temperature detected by subcooling heat exchanger
gas pipe thermistor.
Malfunction
Detection
Malfunction
When the subcooling heat exchanger gas pipe thermistor is short circuited or open.
Decision
Conditions
Supposed
Causes
Troubleshooting
∗ Refer to "Thermistor Resistance / Temperature Characteristics" table on P232.
Troubleshooting
Faulty subcooling heat exchanger gas pipe thermistor (R4T)
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 subcooling heat
NO
exchanger gas pipe
thermistor connected to
X12A of outdoor unit
PC board
(A1P)?
YES
Is the
resistance
measured after
NO
removing the thermistor
(R4T) from outdoor unit PC
board normal?
(3.5 kΩ to
360 kΩ)
YES
Troubleshooting by Indication on the Remote Controller
Connect connector and operate
unit again.
Replace thermistor (R4T).
Replace outdoor unit PC board
(A1P).
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(V3075)
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