Malfunction Of Subcooling Heat Exchanger Thermistor (R6T) - Daikin E-Series Service Manual

SiENBE18-621
7.14 Malfunction of Subcooling Heat Exchanger Thermistor
(R6T)
J9
Remote Control
Display
Applicable
AII outdoor unit models
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
" Faulty subcooling heat exchanger gas pipe thermistor (R6T)
Supposed
" Faulty outdoor unit PCB
Causes
Troubleshooting
∗ Refer to "Thermistor Resistance / Temperature Characteristics" table on P355.
Troubleshooting
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
outdoor unit
PC board
(A1P)?
YES
Is the
resistance
measured after
removing the thermistor NO
(R6T) from outdoor unit PC
board normal?
(3.5 kW to
360 kW)
YES
Troubleshooting for Outdoor Unit
Connect connector and operate
unit again.
Replace thermistor (R6T).
Replace outdoor unit PC board
(A1P).
(V3075)
323