![background image](http://html1.mh-extra.com/html/daikin/ftks50bvmb/ftks50bvmb_service-manual_501473394.webp)
Troubleshooting for Outdoor Unit
SiEN18-622
382
Troubleshooting
7.21 Inverter Start up Error
Remote Control
Display
L9
Applicable
Models
AII outdoor unit models
Method of
Malfunction
Detection
Malfunction is detected from current flowing in the power transistor.
Malfunction
Decision
Conditions
When overload in the compressor is detected during startup
Supposed
Causes
Defect of compressor
Pressure differential start
Defect of outdoor unit PCB (A1P)
Troubleshooting
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.
Inverter
o
u
tp
u
t
volt
a
ge check
Inverter o
u
tp
u
t volt
a
ge
i
s
not
ba
l
a
nced.
(Norm
a
l if within
±
5V) M
us
t
b
e me
asu
red when
fre
qu
ency
i
s s
t
ab
le.
Un
sa
ti
s
f
a
ctory pre
ssu
re
e
qua
liz
a
tion
Check refriger
a
nt
s
y
s
tem.
Compre
ss
or in
s
pection
In
s
pect
a
ccording to the di
a
gno
s
i
s
proced
u
re for odd noi
s
e
s
, vi
b
r
a
tion
a
nd oper
a
ting
s
t
a
t
us
of the
compre
ss
or.
YE
S
Repl
a
ce o
u
tdoor
u
nit PC
b
o
a
rd
(A1P).
NO
NO
Re
s
et
a
nd re
s
t
a
rt.
NO
The difference
b
etween high
a
nd low
pre
ssu
re when
s
t
a
rting
i
s ab
ove
0.2MP
a
.
YE
S
YE
S
Di
s
connect the connection
b
etween the compre
ss
or
a
nd
inverter. M
a
ke the power
tr
a
n
s
i
s
tor check mode ON
b
y
s
ervice mode.
After t
u
rning
on
a
g
a
in, "L9"
b
link
s
a
g
a
in.
(V2
8
14)
Summary of Contents for FTKS50BVMB
Page 1: ...SiEN18 622 E Series Service Manual Applied Models zSuper Multi Plus Cooling Only Heat Pump ...
Page 105: ...Refrigerant Flow for Each Operation Mode SiEN18 622 92 Refrigerant Circuit ...
Page 157: ...Indoor Unit SkyAir Models SiEN18 622 144 Function ...
Page 312: ...SiEN18 622 Ceiling Mounted Cassette Type System Configuration 300 ...
Page 424: ...Method of Replacing The Inverter s Power Transistors Modules SiEN18 622 412 Troubleshooting ...
Page 446: ...Wiring Diagrams SiEN18 622 434 Appendix ...
Page 452: ...SiEN18 622 vi Index ...