Daikin ERQ, Service Manual

Page: 204 / 260

Troubleshooting by Indication on the Remote Controller ESIE09-05
194 Troubleshooting
3.25 “
J5
” Outdoor Unit: Malfunction of Thermistor (R3T, R5T)
for Suction Pipe 1, 2
Remote
Controller
Display
J5
Applicable
Models
ERQ 125 ~ 200 A7V1
Method of
Malfunction
Detection
Malfunction is detected from the temperature detected by the thermistor for suction pipe 1, 2.
Malfunction
Decision
Conditions When a short circuit or an open circuit in the thermistor for suction pipe 1, 2 are detected.
Supposed
Causes
„ Defect of thermistor (R3T, R5T) for outdoor unit suction pipe
„ Defect of outdoor unit PC board (A1P)
Troubleshooting
∗
Refer to thermistor resistance / temperature characteristics table on P232.
(V3073)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Resistance
is normal when
measured after
disconnecting the thermistor
(R3T, R5T) from the
outdoor unit PC
board. (3.5k
Ω
~
360k
Ω
)
Replace outdoor unit PC board
(A1P).
Connect the thermistor and turn
on again.
NO
NO
Replace the thermistor (R3T, R5T).
YES
YES
Connector
of the thermistor for
suction pipe1, 2 is
connected to X12A of
outdoor unit PC board
(A1P).
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