Daikin VRV S RXQ4/5ARV1 - Discharge Pipe Temperature Abnormality

SiAF332111E Troubleshooting by Error Code
Part 6 Service Diagnosis 249
Reference
5.31 Discharge Pipe Temperature Abnormality
5.31.1 Discharge Pipe Temperature Abnormality (4/5 HP Models)
Applicable
Models
RXQ4/5AR
Error Code F3
Method of Error
Detection
Abnormality is detected according to the temperature detected by the discharge pipe thermistor.
Error Decision
Conditions
The discharge pipe temperature rises to an abnormally high level.
The discharge pipe temperature rises suddenly.
Supposed
Causes
 Defective discharge pipe thermistor (R2T)
 Disconnection of discharge pipe thermistor (R2T)
 Defective outdoor unit main PCB
Troubleshooting
CHECK 11 Refer to page 350.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Caution
YES
YES
NO
NO
CHECK 11
Replace the outdoor
unit main PCB (A1P).
When the
unit stops operating
because of an error, is the discharge
pipe temperature higher than
120˚C?
Are the
discharge pipe thermistor
properties normal?
Pull the discharge pipe thermistor out from
the outdoor unit main PCB and then
measure the resistance with a multimeter.
Refrigerant shortage,
compressor failure,
refrigerant system failure, etc.
Replace the discharge
pipe thermistor (R2T).