Troubleshooting by Error Code
SiME332106E
270
Part 6 Service Diagnosis
5.67 System Abnormality, Refrigerant System Address
Undefined
Applicable
Models
All indoor unit models
All outdoor unit models
Error Code
UH
Method of Error
Detection
Detect an indoor unit with no auto address setting.
Error Decision
Conditions
The error decision is made as soon as the abnormality aforementioned is detected.
Supposed
Causes
Improper connection of transmission wiring between indoor-outdoor units
Defective indoor unit PCB
Defective outdoor unit main PCB
Troubleshooting
Is
electricity
being introduced
for the first time after
installation or after an indoor
or outdoor unit main
PCB has been
replaced?
Does
an error
occur even after
12 minutes elapses
from the time when electricity
is introduced to indoor
and outdoor units?
Does a
UH
error occur for all
indoor units in the
system?
Is
indoor-outdoor unit
transmission
wiring normal?
NO
YES
YES
After fixing incorrect wiring,
press and hold the
RETURN
(BS3)
button on the outdoor
unit main PCB for 5 seconds.
Normal
NO
YES
Normal
NO
Does an error occur?
NO
YES
NO
YES
Replace the indoor unit PCB.
Replace the outdoor unit main
PCB (A1P).
Press and hold the
RETURN
(BS3)
button on the outdoor
unit main PCB for 5 seconds
The unit will not run for up to
12 minutes.
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
