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Troubleshooting
SiENBE12-713
274
Service Diagnosis
5.27 Signal Transmission Error (on Outdoor Unit PCB)
Remote Control
Display
U7
Outdoor Unit LED
Display
A
5
1
1
2
4
3
4
4
4
Method of
Malfunction
Detection
Communication error between microcomputer mounted on the main PCB and PM1.
Malfunction
Decision
Conditions
"
When the data sent from the PM1 can not be received successively for 9 sec.
"
The abnormality is determined if the above fault conditions occurs once
"
Fault counter is reset when the data from the PM1 can be successfully received.
Supposed
Causes
"
Defective outdoor unit PCB
Troubleshooting
Repl
a
ce the o
u
tdoor
u
nit
PCB.
The c
aus
e c
a
n
b
e
a
n
extern
a
l f
a
ctor other th
a
n
the m
a
lf
u
nction.
Monitor in long term.
(R5152)
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.
Error
a
g
a
in?
NO
YE
S
T
u
rn the power off
a
nd t
u
rn it on
a
g
a
in.
Summary of Contents for FTKS20D3VMW
Page 11: ...Introduction SiENBE12 713 x...
Page 47: ...Specifications SiENBE12 713 36 Specifications...
Page 113: ...Control Specification SiENBE12 713 102 Function and Control...
Page 235: ...Instruction SiENBE12 713 224 System Configuration...
Page 297: ...Check SiENBE12 713 286 Service Diagnosis...
Page 316: ...SiENBE12 713 Outdoor Unit Removal Procedure 305 Step Procedure Points...