Discharge Pipe Temperature Abnormality - Daikin RMXS-L Series Service Manual

SiUS181631EA
7.7

Discharge Pipe Temperature Abnormality

F3
Error Code
Method of Error The temperature detected by the discharge pipe thermistor determines the error.
Detection
Error Decision
Conditions
Supposed
Causes
Troubleshooting
Check No.33
Refer to P.266
∗
1: Refer to Thermistor Resistance/Temperature Characteristics table 2 on page 268.
∗
2: Compare the resistance value of discharge pipe thermistor and the value based on the surface
Troubleshooting
When the discharge pipe temperature rises to an abnormally high level (135 °C (275°F) and
above)
When the discharge pipe temperature rises suddenly (120 °C (248°F) and above for 10
successive minutes)
Defective discharge pipe thermistor
Disconnection of discharge pipe thermistor (R2T)
Defective main PCB (A1P)
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Connect the service checker.
Press reset and start operation
again.
Is the discharge pipe
thermistor normal?
(See∗1)
YES
Service Checker
Connect the service checker to compare the
temperature of discharge pipe by using service
checker with actual measurement value of discharge
pipe thermistor. (See ∗2)
Is the
temperature
of discharge pipe
by using service
checker the same with
actual measurement
value of discharge
pipe
thermistor?
YES
· Discharge pipe thermistor is normal and the
temperature detection of the main PCB (A1P) is
also normal.
· Actually the temperature of discharge pipe is high.
Check No.33 Remove the factor of overheat
operation.
thermometer.
NO
NO
Troubleshooting for Outdoor Unit
Replace the discharge pipe
thermistor (R2T).
Replace the main PCB (A1P).
(R23968)
235