Daikin RXYQ96PYDN, Service Manual

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Troubleshooting by Indication on the Remote Controller SiUS34-801A_b
374 Troubleshooting
3.22
F6
Outdoor Unit: Refrigerant Overcharged
Remote
Controller
Display
F6
Applicable
Models
RXYQ72P~240PYDN, PTJU
REYQ72P~240PYDN, PTJU
Method of
Malfunction
Detection
Excessive charging of refrigerant is detected by using the outside air temperature, heat exchanging
deicer temperature and liquid pipe temperature during a check run.
Malfunction
Decision
Conditions When the amount of refrigerant, calculated by outside temperature, exceeds the standard heat-
exchange deicer and liquid pipe tempertures during a check run.
Supposed
Causes
Refrigerant overcharge
Misalignment of the outside air thermistor
Misalignment of the heat exchanging deicer thermistor
Misalignment of the liquid pipe thermistor
Troubleshooting
∗
Refer to the Thermistor Resistance / Temperature Characteristics table on Page 523.
(V2797)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Are the
above thermistor
installed on pipes
correctly?
Check the mounting condition of
the temperature sensors of the
outside air thermistor, heat
exchanging deicer thermistor and
liquid pipe thermistor in the piping.
Remove the outside air thermistor,
heat exchanging deicer thermister
and the liquid pipe thermistor from
the outdoor PC board and measure
resistance with a tester.
Is the
characteristic of the
above thermistor
normal?
Refrigerant overcharged.
YES
NO
NO
Replace thermistor.
Install thermistor correctly.
YES