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13
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State of machine Remote controller
Cause
Remedy
Does not operate. The power display
“
” does not
appear on the
remote controller
when power is
supplied to the
system. (When
PAR-F27MEA is
used)
When a power supply unit is used:
1
The power supply unit is not con-
nected with the transmission cable.
2
The power supply unit is not
turned on.
3
The length of the M-NET transmis-
sion cable wiring from the power
supply unit is longer than specified
(longer than 200 m).
1
Connect the power supply unit with
the transmission cable.
2
Check the power of the power sup-
ply unit.
3
Check the length of the transmis-
sion cable wiring. (See the technical
manual for details about the regula-
tions.)
The transmission cable power supply
restrictions have been exceeded.
Make connections within the transmis-
sion cable power supply restrictions of
the outdoor units, or the power supply
units. (See the technical manual for
details about the restrictions.)
Cool air or warm
air does not come
out.
The LCD screen
shows that it is in
operation.
The restart protection delay circuit is
in operation for 3 minutes.
Wait for a while.
(To protect the compressor, a 3
minutes delay circuit is built into the
OA processing unit. Therefore, some-
times the compressor will not start
operating immediately. This delay
may be up to 3 minutes.)
OA processing unit operation has
restarted following the heating and
defrosting operation.
Wait for a while.
(Heating operation starts after de-
frosting operation has ended.)
It runs briefly, but
soon stops.
The
CHECK
and
check code flash-
es on the LCD
screen.
The air inlet or outlet of the OA pro-
cessing unit and/or outdoor unit is
obstructed.
Restart after removing the obstruc-
tion.
The filters are clogged with dust and
dirt.
Restart after cleaning the filters.
Does not humidify.
(GUF-50/100RDH
4
types only)
—
The OA processing unit is not set to
the “
heating” mode.
Set to the heating mode.
Water is not supplied.
Open the service valve.
Dry mode cannot
be set from the
remote controller.
—
There is no dry mode on the OA pro-
cessing unit. Cannot set to dry mode
from the remote controller.
When the unit is set to dry mode from
the central controller, the dry mode
display flashes on the LCD and the
OA processing unit fan operates.
Use a mode other than dry mode.
Dry mode can be
set from the cen-
tral controller, but
does not operate.
Dry mode display
is flashing in LCD.