Daikin FTKS50BVMB, Service Manual

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Troubleshooting for SkyAir Indoor Unit SiEN18-622
342 Troubleshooting
5.7 Malfunction of Capacity Setting
Remote Control
Display
AJ
Applicable
Models FFQ, FCQ, FBQ, FHQ
Method of
Malfunction
Detection
Capacity is determined according to resistance of the capacity setting adapter and the memory
inside the IC memory on the indoor unit PCB, and whether the value is normal or abnormal is
determined.
Malfunction
Decision
Conditions Operation and:
(1)When the capacity code is not contained in the PCB’s memory, and the capacity setting
adapter is not connected.
(2)When a capacity that doesn’t exist for that unit is set.
Supposed
Causes „
Failure of capacity setting adapter connection
„
Failure of indoor unit PCB
Troubleshooting
Note: Capacity is factory set in the data IC on the PCB. A capacity setting adapter that matches the
capacity of the unit is required in the following case.
If the indoor PCB installed at the factory is for some reason changed at the installation site, the
capacity will not be contained in the replacement PCB.
If you connect a capacity setting adapter to a PCB in which the capacity is memorized, the
capacity setting for the PCB will become the capacity setting of the adapter. (Priority of capacity
setting adapter)
(Q0415)
NO
NO
YE S
YE S
I s the
c a p a city s etting
a d a pter pl u gged into X2 3 A
of the indoor u nit
PCB?
T u rn the power su pply off once
a nd ba ck on.
I s AJ di s pl a yed on
the remote control?
Pl u g a c a p a citor s etting
a d a pter th a t m a tche s the
c a p a city of the u nit into
X2 3 A. ( S ee note)
B a d cont a ct of c a p a city
s etting a d a pter or
di s connected a d a pter.
Indoor u nit PCB
repl a cement
Co u ld b e o u t s ide c aus e
(noi s e, etc.) other th a n
m a lf u nction.
Caution
Be su re to t u rn off power s witch b efore connect or di s connect connector,
or p a rt s d a m a ge m a y b e occ u rred.