![background image](http://html1.mh-extra.com/html/daikin/lryeq16ay1/lryeq16ay1_service-manual_3234341208.webp)
Troubleshooting
SiBE811001EB
207
CONVENI-PACK
8.4.28 Abnormal Discharge Pipe Temperature
Error Code
F3
Applicable
Models
LRYEQ16AY1
Method of Error
Detection
Abnormality is detected according to the temperature detected by the discharge pipe
temperature thermistor.
Error Decision
Conditions
When the discharge pipe temperature rises to an abnormally high level
Supposed
Causes
Defective discharge pipe temperature
Defective discharge pipe thermistor
Defective outdoor unit PCB
Troubleshooting
∗
1. Compare the resistance value of discharge pipe thermistor and the value based on the surface thermometer.
Refer to P.288, 289.
Refer to P.294.
OR
• Discharge pipe temperature > 120°C continues for consecutive 70 sec. or more
• Discharge pipe temperature > 125°C continues for consecutive 30 sec. or more
• Discharge pipe temperature > 130°C
&
• Discharge pipe temperature > 110°C
• Electronic expansion valve (Y2E)
≥
450 pls
• Electronic expansion valve (Y3E) continues for consecutive 60 sec. or more
Check if discharge
pipe thermistor
property is normal.
Replace the discharge pipe
thermistor.
NO
Replace the outdoor unit main
PCB (A1P).
NO
Caution
Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged.
YES
YES
Connect the service checker.
Press reset and start operation again.
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 (Refer to
∗
1).
· Discharge pipe thermistor is normal and the temperature detection
of the outdoor unit main PCB is also normal.
· Actually the temperature of discharge pipe is high.
CHECK 3-1, 3-2
Remove the factor of overheat operation
referring to P.288, 289.
Check if temperature of
discharge pipe by using
service checker is the same
with actual measurement
value of discharge pipe
thermistor.
CHECK 13
CHECK 3-1, 3-2
CHECK 13