SiEBE18-526 Troubleshooting for Outdoor Unit
Troubleshooting 323
7.28 Malfunction of System, Refrigerant System Address
Undefined
Remote
Controller
Display
UH
Applicable
Models
AII indoor unit models
All BP unit models
AII outdoor unit models
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Defect of indoor unit PCB
Defect of BP unit PCB
Defect of outdoor unit PCB (A1P)
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
(Q0389)
NO
YES
YES
After fixing incorrect wiring,
push and hold the RESET
button on the outdoor unit
PCB for 5 seconds.
Normal
NO
Is
electricity
being introduce
for the first time after
installationor after an indoor
or outdoor or BP unit
PCB has been
replaced?
Is
indoor - BP and
BP - outdoor unit
transmission wiring
normal?
YES
Normal
NO
Doesa malfunction
occur?
NO
Does
a "UH" malfunction occur
for all indoor units in
the system?
YES
NO
Does
a malfunction
occur even after 12
minutes elapses from the
time when electricity is
introduced to BP
and outdoor
units?
YES
Replace BP unit or indoor unit
PCB.
Replace outdoor unit PCB
(A1P).
Push and hold the RESET
button on the outdoor unit
PCB for 5 seconds
∗ The unit will not run for
up to
12 minutes.
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