SiUS30-1301
Troubleshooting by Indication on the Remote Controller
Service Diagnosis
225
Check if
the normal
condition monitor
LED for the external
control adaptor for
condensing
u
nit
b
links.
Check if
the po
w
er
s
u
pply
w
ire for the
external control adaptor
for condensing
u
nit is
connected to 5
V
s
u
pply line.
Cool/Heat
selection is
u
nified.
Setting of
C/H SELECT of
the external control
adaptor for condensing
u
nit
is “
u
nified MASTER”.
Setting
of C/H
SELECT of the
external control adaptor for
condensing
u
nit is
“SLA
V
E”.
Set
the C/H
SELECT of
the external control
adaptor for condensing
u
nit to “I
N
D”. Then check if
the error occ
u
rs again.
Check if
po
w
er is s
u
pplied to
the condensing
u
nit.
Check
if the normal
condition monitor
LED for the condensing
u
nit main PCB
b
links.
N
O
N
O
YES
YES
YES
YES
YES
YES
YES
YES
N
O
N
O
N
O
N
O
N
O
N
O
C/H SELECT of the external
control adaptor for condensing
u
nit is set to “I
N
D”.
The
u
nified addresses for
COOL/HEAT
w
ithin the
condensing-condensing
transmission are d
u
plicated.
Set the address again.
Replace the condensing
u
nit
main PCB.
S
u
pply the po
w
er to the
condensing
u
nit.
Replace the condensing
condensing
Connect the po
w
er s
u
pply
w
ire
for the external control adaptor
for condensing
u
nit to 5
V
s
u
pply
line.
Replace the PCB of the external
control adaptor for condensing
u
nit.
Replace the condensing
u
nit
main PCB.
Diagnosis Flo
w
2
Check of error 3
Check of error 4