Refrigerant Overcharged - Daikin VRV IV-S RXTQ-TAVJU Series Service Manual

SiUS331604E

4.26 Refrigerant Overcharged

F6
Error Code
Applicable
All outdoor units
Models
Method of Error
Excessive charging of refrigerant is detected by using the outdoor air temperature, heat exchanger
Detection deicer temperature and liquid pipe temperature during a check operation.
Error Decision During a check operation, the amount of refrigerant will be calculated based on the outdoor
Conditions temperature, the heat exchanger deicer temperature, and the liquid pipe temperature. If the
calculated amount exceeds the normal amount by 30%, too much refrigerant has been added.
(Adding only slightly more than the normal amount of refrigerant may also cause F6 to be
displayed)
Supposed
Causes
Troubleshooting
CHECK 11
Service Diagnosis
Refrigerant overcharge
Disconnection of outdoor air thermistor, heat exchanger deicer thermistor, liquid pipe thermistor
Defective outdoor air thermistor, heat exchanger deicer thermistor, liquid pipe thermistor
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Check the mounting condition of
the outdoor air temperature
thermistor, heat exchanger
deicer thermistor and liquid pipe
thermistor in the piping.
Are the above
thermistor installed on
pipes correctly?
YES
Remove the outdoor air
temperature thermistor, heat
exchanger deicer thermistor and
the liquid pipe thermistor from the
outdoor unit PCB and measure
resistance with a tester.
Is the characteristic
of the above
thermistor normal?
CHECK 11
YES
Refer to page 231.
NO
NO
Troubleshooting by Error Code
Install the thermistor correctly.
Replace the thermistor.
Rectify the overcharge of the
refrigerant.
178