Toshiba MMY-MAP0724HT6UL, Руководство по обслуживанию

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8-5-4. In checking the number of connected outdoor units and
connected indoor units after address setup, a lower
number of connected units is displayed. (There are
outdoor/indoor units that do not operate in a test
operation.)
Status Cause Countermeasures
The number of
connected
outdoor units is
too few.
Miswiring of communication lines between outdoor units
or an unconnected wire ( Fig. 4). (Address setup
operation finished without recognizing a miswired
follower unit.) After modification of wiring, set up the addresses again and
check the number of connected outdoor units.
The number of
connected indoor
units is too few.
Miswiring of communication lines between indoor units
or an unconnected wire ( Fig. 5). (Address setup
operation finished without recognizing a miswired indoor
unit.) After modification of wiring, set up the addresses again and
check the number of connected indoor units.
The number of
outdoor units
connected to a
group is too few in
group operation
from an indoor
remote control.
The indoor remote control is not connected with wire.
Miswiring of the indoor remote control Using the main indoor remote control connected to a group,
start a test operation, specify the unit that is not operating (the
unit not connected to the group), and then check the wiring.
Indoor remote control communication circuit error
If 460 V is incorrectly applied to the remote control
terminal, the remote control communication circuit fails. Using the main indoor remote control connected to a group,
start a test operation and then specify the unit that is not
operating (the unit not connected to the group). Remove the
fast-on terminal connected to remote control terminals A/B,
and check the voltage. If voltage is not applied (normally 15
to18 V), replace the PC board.