SiME332106E
Troubleshooting by Error Code
Part 6 Service Diagnosis
263
NO
YES
The number
of indoor units
connected to the same
system is less than 64.
Replace the outdoor unit main
PCB (A1P).
NO
YES
Check if
the refrigerant
type of the outdoor
unit corresponds to that
of the indoor unit.
Excess indoor units are
connected.
Check for the connection to
connect the proper number of
indoor units.
Replace the outdoor unit main
PCB (A1P).
Match the refrigerant types of the
outdoor unit and the indoor unit.
Diagnosis Flowchart-1
UA-17
Error code
Sub code
Diagnosis Flowchart-2
Error code
Sub code
UA-18
NO
YES
YES
YES
NO
NO
Replace the outdoor unit main
PCB (A1P).
Check for the model of outdoor
unit.
Make setting again, and then
reset the power supply.
Replace the spare PCB.
NO
YES
Replace the outdoor unit main
PCB (A1P).
Was the
outdoor unit
main PCB replaced with a
spare PCB?
A
different model
of outdoor unit is
connected.
Diagnosis Flowchart-3
Error code
Sub code
UA-20
Multi connection?
Was proper setting of
spare PCB made?
