Outdoor Temperature Thermistor (R1T) Abnormality - Daikin RMXS-L Series Service Manual

SiUS181631EA
7.9

Outdoor Temperature Thermistor (R1T) Abnormality

H9
Error Code
Method of Error The temperature detected by the outdoor temperature thermistor determines the error.
Detection
Error Decision When the outdoor temperature thermistor has short circuit or open circuit
Conditions
Supposed
Causes
Troubleshooting
Refer to Thermistor Resistance/Temperature Characteristics table 1 on page 267.
Troubleshooting
Disconnection of thermistor
Defective outdoor temperature thermistor (R1T)
Defective main PCB (A1P)
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Is the
thermistor
NO
connected to X11A on
the main PCB
(A1P)?
YES
Is the resistance
normal when measured
NO
after disconnecting the
thermistor (R1T)?
(3.5 kΩ ~ 360 kΩ)
YES
Troubleshooting for Outdoor Unit
Connect the thermistor and
turn on again.
Replace the outdoor
temperature thermistor
(R1T).
Replace the main PCB
(A1P).
(R15642)
237