Troubleshooting for Outdoor Unit
SiENBE18-621
326
Troubleshooting
7.17 Malfunction of PCB
Remote Control
Display
L1
Applicable
Models
AII outdoor unit models
Method of
Malfunction
Detection
"
Detect malfunctions by current value during waveform output before compressor startup.
"
Detect malfunctions by current sensor value during synchronized operation at the time of
startup.
"
Detect malfunctions using an SP-PAM series capacitor overvoltage sensor.
Malfunction
Decision
Conditions
"
In case of overcurrent (OCP) during waveform output
"
When the current sensor malfunctions during synchronized operation
"
When overvoltage occurs in SP-PAM
"
In case of IGBT malfunction
Supposed
Causes
"
Faulty outdoor PCB (A1P)
•
IPM failure
•
Current sensor failure
•
SP-PAM failure
•
Failure of IGBT or drive circuit
Troubleshooting
YE
S
NO
T
u
rn OFF the power
su
pply once
a
nd then t
u
rn
it ON
a
g
a
in.
Doe
s
it ret
u
rn norm
a
lly?
It i
s
b
elieved th
a
t
extern
a
l f
a
ctor
s
(noi
s
e,
etc.) other th
a
n f
a
il
u
re
c
aus
ed the m
a
lf
u
nction.
Repl
a
ce the o
u
tdoor PC
b
o
a
rd (A1P).
(PC
b
o
a
rd e
qu
ipped with
a
re
s
in c
as
e)
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...
