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Troubleshooting by Indication on the Remote Controller
SiUS30-1301
232
Service Diagnosis
Check of error 3
Check of error 4
Diagnosis Flo
w
3
Replace the condensing
u
nit
main PCB.
Check if
the condensing
u
nit
PCB is replaced
w
ith spare
parts PCB.
Check if
the
u
nit is not
connected to condensing
u
nits of different
models.
Is the
w
iring
b
et
w
een the
condensing
u
nit and Branch
Selector
u
nit
correct?
Is the setting of spare
PCB correct?
Check the model of the
condensing
u
nit.
Correct the setting to reset
the po
w
er.
N
O
N
O
Replace it
w
ith correct spare
PCB.
N
O
N
O
YES
YES
Is a correct
spare PCB proc
u
red?
YES
Replace the spare PCB.
YES
Correct the
w
iring.
Replace the condensing
u
nit
PCB.
N
O
YES
Check of error 3
Check of error 4
Diagnosis Flo
w
4
Check if
the refrigerant type
of the condensing
u
nit
corresponds to that of
the indoor
u
nit.
Replace the condensing
u
nit
main PCB.
Match the refrigerant types of the
condensing
u
nit and the indoor
u
nit.
YES
N
O
Check of error 3
Check of error 4
Diagnosis Flo
w
2