Troubleshooting by Indication on the Remote Controller
Mini UM S/M
158
Troubleshooting
4.45
“
UF
”
Refrigerant System not Set, Incompatible Wiring/
Piping
Remote
Controller
Display
UF
Applicable
Models
AII indoor unit models
AII outdoor unit models
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Improper connection of transmission wiring between outdoor unit and outdoor unit outside
control adaptor
Failure to execute wiring check operation
Defect of indoor unit PC board
Failure to open the stop valve
Troubleshooting
Note:
Test operation may not be successful if carried out after the outdoor unit has been off for more
than 12 hours, or if it is not carried out after running all connected indoor units in the fan mode
for at least an hour.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
(V2830)
Is
indoor - outdoor
and outdoor - outdoor unit
transmission wiring
normal?
Replace indoor unit PC board.
Test operation may not have
been carried out successfully.
After fixing incorrect wiring,
push and hold the RESET
button on the master outdoor
unit PC board for 5 seconds.
YES
NO
YES
NO
NO
YES
Is the
test operation
(Wiring check operation)
carried out?
Is indoor
-outdoor and outdoor-
outdoor unit transmission
wiring normal?
Open stop valve.
YES
NO
Are the stop
valves openned?
∗
The unit will not run for up to
12 minutes.
Mini UM.book Page 158 Monday, January 24, 2005 11:32 AM
