Daikin RQYQ140-180PY1 Service Manual page 142

Troubleshooting by Remote Controller
Troubleshooting
*1. Malfunction code, details of trouble, and electric symbol
Malfunction
*2 Refer to "Thermistor Resistance / Temperature Characteristics" table on P.199.
133
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
NO Is the malfunction
J3 J5
code " " or " "?
YES
There are multiple
corresponding thermistors.
Use the outdoor unit PCB
monitor mode to check which
thermistor is affected.
Check the connector
connection (*1).
Is the
connection normal?
YES
Disconnect the thermistor
from the outdoor unit PCB
and use a tester to measure
the resistance value.
Is the resistance
normal?
(*2)
YES
Corresponding thermistor
code
Discharge pipe thermistor (M1C)
J3
Heat exchanger liquid pipe thermistor
J8
Heat exchanger liquid pipe thermistor
J4
Heat exchanger gas pipe thermistor
J5
Suction pipe thermistor
J6
Heat exchanger thermistor
Subcooling heat exchanger
thermistor
J7
Liquid pipe thermistor
Subcooling heat exchanger gas pipe
J9
thermistor
NO
NO
Electric
symbol
liquid pipe
SiBE341001
Connect the connector correctly.
Replace the thermistor.
Replace the outdoor unit PCB.
Connector
R2T
X29A
Collective
R3T
thermistor
R4T
R5T
R6T
X30A
R8T
Collective
thermistor
R9T
R7T
Troubleshooting