Daikin SkyAir RZQ200 · 250C7Y1B Service Manual page 99

Troubleshooting Based on Equipment Condition
Troubleshooting
Heating: Indoor unit
[
Cooling: Outdoor unit
88
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Is the type of
remote controller wired or
wireless?
Wireless
Is the
operation lamp
of indoor unit photo-sensing
section flashing?
NO
]
Does the fan rotate?
YES
Is the filter soiled?
NO
Is there any item
disturbing airflow?
Is the detection
temperature of the indoor
unit suction thermistor
normal?
NO
Is the heat
exchanger soiled?
NO
Possible causes as follows:
∗ Refrigerant overcharge
∗ Mixing of air in refrigerant
system
∗ Faulty pressure switch
Is
wired
the operation
lamp of remote controller
flashing?
YES
NO
YES
YES
YES
YES
SiBE26-701
YES
Diagnose based on the
error code on remote
controller
Malfunction of fan motor
Check the magnetic switch
and aux. switch for fan
motor
Cleaning
Remove the disturbing
item
When the temperature
detected by the thermistor
is compared with the actual
temperature and they are
different each other, find
out the cause (thermistor
position, presence of short-
circuit, etc.).
Cleaning of the heat
exchanger
After vacuum drying,
charge correct amount of
refrigerant
Check the pressure switch
(S1992)
Troubleshooting