Troubleshooting by Error Code SiAF332111E
196 Part 6 Service Diagnosis
U2 - 01 Shortage of inverter power supply voltage
Refer to the U2 flowchart and make a diagnosis based
on the Error code shown to the left.
U2 - 02 Power phase loss
U3 - 02
Initial installation alarm, Test operation failed due to
indoor unit error
Refer to the U3 flowchart and make a diagnosis based
on the Error code shown to the left.
U3 - 03 Test operation not conducted
U3 - 04 Abnormal end of test operation
U3 - 05
Premature end of test operation during initial
transmission error – check indoor unit error U4/U9
U3 - 06
Premature end of test operation during normal
transmission error
U3 - 07
Premature end of test operation due to transmission
error
U3 - 08
Premature end of test operation due to transmission
error of all units
U3 - 10
System refrigerant auto charge operation not yet
executed
U4 - 01
Transmission error between indoor unit and outdoor
unit
Refer to the U4 flowchart and make a diagnosis based
on the Error code shown to the left.
U4 - 03
Transmission error between indoor unit and system:
check indoor unit error
U9 - 01
Other indoor units and outdoor unit abnormality Refer to the U9 flowchart and make a diagnosis based
on the Error code shown to the left.
UA - 00
TSS plus unit field settings error, CT
address duplication warning
Refer to the UA flowchart and make a diagnosis based
on the Error code shown to the left.
UA - 03 Connection of excessive indoor units
UA - 17 Connection of excess indoor units
UA - 18 Connection of incorrect models of indoor units
UA - 21 Wrong connection
UF - 01 Wrong wiring check error
Refer to the UF flowchart and make a diagnosis based
on the Error code shown to the left.
UF - 05 Defective stop valve for test operation
UH - 01 Wiring error Refer to the UH flowchart.
Error code
Troubleshooting
Description of error Diagnosis
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