Troubleshooting for SkyAir Indoor Unit
SiENBE18-621
290
Troubleshooting
5.7
Malfunction of Capacity Setting
Remote Control
Display
AJ
Applicable
Models
FFQ-B, FHQ-BU
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)
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?
YE
S
YE
S
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
ptor or
di
s
connected
a
d
a
ptor.
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.
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?
NO
(Q0415)
NO
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.
Summary of Contents for BPMKS967B2B
Page 1: ...SiENBE18 621 E Series Service Manual Applied Models Super Multi Plus Heat Pump...
Page 12: ...SiENBE18 621 List of Functions 1 Part 1 List of Functions 1 List of Functions 2...
Page 19: ...List of Functions SiENBE18 621 8 List of Functions...
Page 33: ...Specifications SiENBE18 621 22 Specifications...
Page 69: ...Refrigerant Flow for Each Operation Mode SiENBE18 621 58 Refrigerant Circuit...
Page 121: ...Indoor Unit SkyAir Models SiENBE18 621 110 Function...
Page 169: ...Instruction SiENBE18 621 158 System Configuration FTXS 20 25 35C Indoor Unit...
Page 371: ...Method of Replacing The Inverter s Power Transistors Modules SiENBE18 621 360 Troubleshooting...
Page 393: ...SiENBE18 621 vi Index...
