Specifications

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160 Troubleshooting
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Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
(V2831)
NO
YES
YES
After fixing incorrect wiring,
push and hold the RESET
button on the master outdoor
unit PC board for 5 seconds.
Normal
NO
Is
electricity
being introduce for
the first time after
installation or after an indoor
or outdo or unit PC
board has been
replaced?
Is
indoor - outdoor and
outdoor - outdoor unit
transmission wiring
normal?
YES
Normal
NO
Does a
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 indoor
and outdoor
units?
YES
Replace indoor unit PC board.
Replace outdoor unit PC
board (A1P).
Push and hold the RESET
button on the outdoor unit
PC board for 5 seconds
∗ The unit will not run for up to
12 minutes.