Troubleshooting for Outdoor Unit
SiENBE18-621
328
Troubleshooting
7.19 Inverter Compressor Abnormal
Remote Control
Display
L5
Applicable
Models
AII outdoor unit models
Method of
Malfunction
Detection
Malfunction is detected from current flowing in the power transistor.
Malfunction
Decision
Conditions
When an excessive current flows in the power transistor.
(Instantaneous overcurrent also causes activation.)
Supposed
Causes
"
Defect of compressor coil (disconnected, defective insulation)
"
Compressor start-up malfunction (mechanical lock)
"
Defect of inverter PCB
Troubleshooting
Higher voltage than actual is displayed when the inverter output voltage is checked by tester.
(V2
8
12)
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.
Compre
ss
or in
s
pection
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.
Repl
a
ce the compre
ss
or.
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.
NO
Repl
a
ce the inverter
u
nit.
YE
S
YE
S
Correct power
su
pply.
YE
S
The compre
ss
or'
s
coil i
s
di
s
connected or the
in
su
l
a
tion i
s
defective.
NO
NO
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
s
etting
ON
b
y
s
ervice mode.
There i
s
in
s
t
a
ntenio
us
power
drop.
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...