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SiENBE04-512A
Troubleshooting
Service Diagnosis
129
4.21 Over-voltage Detection
Remote Control
Display
U2
Method of
Malfunction
Detection
An abnormal voltage rise is detected by checking the specified over-voltage detection circuit.
Malfunction
Decision
Conditions
An over-voltage signal is fed from the over-voltage detection circuit to the microcomputer
(The voltage is over 400V).
The system will be shut down if the error occurs 255 times.
Clearing condition: Continuous run for about 10 minutes (normal)
Supposed
Causes
Supply voltage not as specified
Over-voltage detection circuit defective
PAM control part(s) defective
Troubleshooting
Note:
If the model doesn’t have SPM, replace the outdoor unit PCB.
Check the
su
pply volt
a
ge.
Correct the power
su
pply.
Check for
su
ch f
a
ctor
s
for
a
long term.
Repl
a
ce the
S
PM.
(Repl
a
ce the o
u
tdoor
u
nit
PCB.)
(R2957)
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.
Error di
s
pl
a
yed
a
g
a
in?
YE
S
NO
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
.
SiENBE04-512A.book Page 129 Friday, October 5, 2007 1:49 PM
Summary of Contents for ARKH20CVMB7
Page 1: ...SiENBE04 512A Service Manual Inverter Pair Wall Mounted Type C Series D Series ...
Page 17: ...List of Functions SiENBE04 512A 8 List of Functions ...
Page 37: ...Specifications SiENBE04 512A 28 Specifications ...
Page 73: ...Control Specification SiENBE04 512A 64 Function and Control ...
Page 103: ...Instruction SiENBE04 512A 94 System Configuration ...
Page 147: ...Check SiENBE04 512A 138 Service Diagnosis ...
Page 225: ...Outdoor Unit RK X H C ARK X H C R Y N C SiENBE04 512A 216 Removal Procedure ...
Page 229: ...Others SiENBE04 512A 220 Others ...
Page 241: ...Wiring Diagrams SiENBE04 512A 232 Appendix ...