Daikin ERQ, Service Manual

Page: 207 / 260

ESIE09-05 Troubleshooting by Indication on the Remote Controller
Troubleshooting 197
3.28 “
J9
” Outdoor Unit: Malfunction of Thermistor (R4T)
Remote
Controller
Display
J9
Applicable
Models
ERQ 125 ~ 200 A7V1
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 (R4T)
„ Faulty outdoor unit PC board
Troubleshooting
∗ Refer to “Thermistor Resistance / Temperature Characteristics” table on P232.
(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
(R4T) from outdoor unit PC
board normal?
(3.5 k
Ω
to
360 k
Ω
)
Replace outdoor unit PC board
(A1P).
Connect connector and operate
unit again.
NO
NO
Replace thermistor (R4T).
YES
YES
Is
the connector
for subcooling heat
exchanger gas pipe
thermistor connected to
X12A of outdoor unit
PC board
(A1P)?
Все каталоги и инструкции здесь: http : //splitoff.ru/tehn-doc.html