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SiBE811001EB
Troubleshooting
CONVENI-PACK
260
8.5.7 Abnormal Discharge Pipe Temperature
Error Code
F3
Applicable
Models
LCBKQ3AV1
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
Clogging of electronic expansion valve for injection
Insufficient injection at intermediate heat exchanger outlet caused by flash gas due to gas
leakage or insufficient volume of refrigerant
Insufficient insulation of onsite suction pipe
Defective suction pipe thermistor
Defective low pressure sensor
Troubleshooting
∗
1. Compare the resistance value of discharge pipe thermistor and the value based on the surface thermometer.
Refer to P.290.
LED Indications
First digit
l h k h l h l
Second digit
l k h h h l l
OR
• 120°C or more
• 110°C or more: 15 sec.
• 120°C or more: 90 sec.
Check if discharge
pipe thermistor
property is normal.
(
∗
1)
Replace the discharge pipe
thermistor.
NO
Replace the 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 (
∗
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 3-3
Remove the factor of overheat operation referring to
P.290.
Check if
temperature of
discharge pipe by
using service
checker is the same
with actual
measurement value
of discharge pipe
thermistor.
CHECK 3-3