Daikin REYQ8-48PY1B, Service Manual

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SiBE37-701_B Troubleshooting by Indication on the Remote Controller
Troubleshooting 300
3.24
“
F6
”
Outdoor Unit: Refrigerant Overcharged
Remote
Controller
Display
F6
Applicable
Models REYQ8P~48P
Method of
Malfunction
Detection Excessive charging of refrigerant is detected by using the outdoor air temperature, heat
exchanging deicer temperature and liquid pipe temperature during a check run.
Malfunction
Decision
Conditions When the amount of refrigerant, which is calculated by using the outdoor air temperature, heat
exchanging deicer temperature and liquid pipe temperature during a check run, exceeds the
standard.
Supposed
Causes
„
Refrigerant overcharge
„
Disconnection of outdoor air thermistor
„
Disconnection of the heat exchanging deicer thermistor
„
Disconnection of the liquid pipe thermistor
Troubleshooting
∗
Refer to “Thermistor Resistance / Temperature Characteristics” table on P450.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Check the mounting condition of
the temperature sensors of the
outdoor air thermistor, heat
exchanging deicer thermistor and
liquid pipe thermistor in the piping.
Are the above
thermistor installed
on pipes correctly?
Install the thermistor correctly.
NO
Remove the outdoor air thermistor,
heat exchanging deicer thermistor
and the liquid pipe thermistor from
the outdoor PCB and measure
resistance with a tester.
Is the characteristic
of the above
thermistor normal?
Replace the thermistor.
Rectify the overcharge of
refrigerant.
YES
YES
NO