Malfunction Of Thermistor (R3T, R5T) For Suction Pipe1, 2 - Daikin E-Series Service Manual

Troubleshooting for Outdoor Unit
7.11 Malfunction of Thermistor (R3T, R5T) for Suction
Pipe1, 2
J5
Remote Control
Display
Applicable
AII outdoor unit models
Models
Method of Malfunction is detected from the temperature detected by the thermistor for suction pipe 1, 2.
Malfunction
Detection
Malfunction
When a short circuit or an open circuit in the thermistor for suction pipe 1, 2 are detected.
Decision
Conditions
" Defect of thermistor (R3T, R5T) for outdoor unit suction pipe
Supposed
" Defect of outdoor unit PCB (A1P)
Causes
Troubleshooting
∗ Refer to thermistor resistance / temperature characteristics table on P355.
320
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Connector
of the thermistor for
suction pipe1, 2 is
connected to outdoor
unit PC board
(A1P).
YES
Resistance
is normal when
measured after
disconnecting the thermistor
(R3T, R5T) from the
outdoor unit PC
board. (3.5kW ~
360kW)
YES
NO
NO
SiENBE18-621
Connect the thermistor and turn
on again.
Replace the thermistor (R3T, R5T).
Replace outdoor unit PC board
(A1P).
(V3073)
Troubleshooting