Suction Pipe Thermistor (R3T, R5T) Abnormality - Daikin RMXS-L Series Service Manual

SiUS181305E

7.11 Suction Pipe Thermistor (R3T, R5T) Abnormality

J5
Error Code
Method of Error
The temperature detected by the suction pipe thermistor determines the error.
Detection
Error Decision
When a short circuit or an open circuit in the suction pipe thermistor is detected
Conditions
 Disconnection of thermistor
Supposed
 Defective suction pipe thermistor (R3T, R5T)
Causes
 Defective main PCB (A1P)
Troubleshooting
Identify the defective
thermistor (R3T or R5T) in
monitor mode.
Refer to Thermistor Resistance / Temperature Characteristics table 1 on page 224.
Refer to page 139 for detail about monitor mode.
Troubleshooting
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Is the thermistor
NO
ASSY connected to
X12A on the main PCB
(A1P)?
YES
Is the
resistance
normal when
measured after
NO
disconnecting the
thermistor (R3T,
R5T)? (3.5 kΩ ~
360 kΩ)
YES
Troubleshooting for Outdoor Unit
Connect the thermistor and
turn on again.
Replace the defective
thermistor (R3T, R5T).
Replace the main PCB
(A1P).
(R18082)
196