Daikin FTX25JVEA9 Service Manual page 270

Si18-201
2.6.5 Failure of Capacity Setting
AJ
Remote
Controller
Display
Applicable FHYC
Models
Method of Capacity is determined according to resistance of the capacity setting adaptor and the memory
inside the IC memory on the indoor unit PC board, and whether the value is normal or abnormal
Malfunction
is determined.
Detection
Malfunction Operation and:
(1)When the capacity code is not contained in the PC board's memory, and the capacity setting
Decision
adaptor is not connected.
Conditions
(2)When a capacity that doesn't exist for that unit is set.
"
Supposed
"
Causes
Troubleshooting
Note: Capacity is factory set in the data IC on the PC board. A capacity setting adaptor that matches
the capacity of the unit is required in the following case.
If the indoor PC board installed at the factory is for some reason changed at the installation site,
the capacity will not be contained in the replacement PC board.
If you connect a capacity setting adaptor to a PC board in which the capacity is memorized, the
capacity setting for the PC board will become the capacity setting of the adaptor. (Priority of
capacity setting adaptor)
Service Diagnosis
Failure of capacity setting adaptor connection
Failure of indoor unit PC board
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Is the
capacity setting
adaptor plugged into X23A
of the indoor unit PC
board?
YES
Turn the power supply off
once and back on.
Is AJ displayed on
the remote controller?
NO
NO
YES
Troubleshooting - SkyAir Indoor Unit
Plug a capacitor setting
adaptor that matches the
capacity of the unit into X23A.
(See note)
Indoor unit PC board
replacement
Could be outside cause (noise,
etc.) other than malfunction.
(MF015)
257