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Troubleshooting
SiE12-411
202
Service Diagnosis
5.24 Low-voltage Detection
Remote
Controller
Display
U2
Outdoor Unit LED
Display
A
5
1
4
2
1
3
1
4
4
Method of
Malfunction
Detection
An abnormal voltage rise or drop is detected by checking the detection circuit or DC voltage
detection circuit.
Malfunction
Decision
Conditions
"
An over-voltage signal is fed from the over-voltage detection circuit to the microcomputer, or
the voltage being detected by the DC voltage detection circuit is judged to be below 150 V
for 0.1 second.
"
The system will be shut down if the error occurs 16 times.
"
Clearing condition: Continuous run for about 60 minutes (normal)
Supposed
Causes
"
Supply voltage not as specified
"
Over-voltage detector or DC voltage detection circuit defective
"
PAM control part(s) defective
Troubleshooting
Check the
su
pply volt
a
ge.
Correct the power
su
pply.
Check for
su
ch f
a
ctor
s
for
a
long term.
∗
Try to get re
s
t
a
rted
a
co
u
ple of time
s
.
Repl
a
ce the
S
PM.
(Repl
a
ce the o
u
tdoor
u
nit
PCB.)
(R2
8
54)
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.
Su
pply volt
a
ge
as
s
pecified?
NO
YE
S
T
u
rn on the
power
a
g
a
in.
S
y
s
tem re
s
t
a
rted?
NO
YE
S
Di
s
t
u
r
ba
nce f
a
ctor
s
∗
Noi
s
e
∗
Power
su
pply di
s
tortion
Repe
a
t
a
co
u
ple of time
s
.
(Prec
au
tion
b
efore t
u
rning on the power
a
g
a
in)
M
a
ke
su
re the power h
as
b
een off for
a
t le
as
t
3
0
s
econd
s
.
Summary of Contents for Super Multi NX C-Series
Page 6: ...SiE12 411 Table of Contents v Index i Drawings Flow Charts v...
Page 7: ...SiE12 411 vi Table of Contents...
Page 67: ...Specifications SiE12 411 56 Specifications...
Page 171: ...Instruction SiE12 411 160 System Configuration...
Page 225: ...Check SiE12 411 214 Service Diagnosis...
Page 295: ...SiE12 411 iv Index...