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SiEN18-622
Troubleshooting for Outdoor Unit
Troubleshooting
379
7.18 Malfunction of Inverter Radiating Fin Temperature Rise
Remote Control
Display
L4
Applicable
Models
AII outdoor unit models
Method of
Malfunction
Detection
Fin temperature is detected by the thermistor of the radiation fin.
Malfunction
Decision
Conditions
When the temperature of the inverter radiation fin increases above 83°C.
Supposed
Causes
Actuation of fin thermal (Actuates above 83°C)
Defect of inverter PCB
Defect of fin thermistor
Troubleshooting
Caution
NO
YE
S
YE
S
YE
S
YE
S
NO
NO
NO
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.
The r
a
di
a
tor fin
temper
a
t
u
re i
s su
ppo
s
ed
to h
a
ve ri
s
en to
83
°
C
or more.
I
s
the
connector X111A of the
fin thermi
s
tor properly
connected to the o
u
tdoor
PCB?
T
u
rn ON the power
su
pply,
a
nd then pre
ss
the remote
control check
bu
tton once.
I
s
the
m
a
lf
u
nction code
"P4"di
s
pl
a
yed on the
remote control?
Doe
s
the
m
a
lf
u
nction code
"L4" rec
u
r when the
u
nit
s
t
a
rt
s
oper
a
tion?
F
au
lty he
a
t r
a
di
a
tion of power
u
nit
• Air
su
ction opening
b
locked
• Dirty r
a
di
a
tor fin
• High o
u
tdoor temper
a
t
u
re
Properly connect.
To "P4" tro
ub
le
s
hooting
Repl
a
ce the o
u
tdoor PCB
(A1P)
as
well.
Contin
u
e oper
a
tion.
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 ...