In Checking The Number Of Connected Outdoor Units And Connected Indoor Units After; Outdoor / Indoor Units That Do Not Operate In A Test Operation.); Address Setup, A Lower Number Of Connected Units Is Displayed. (There Are Outdoor / Indoor Units That Do Not Operate In A Test Operation.) - Toshiba MCY-MHP0404HS-E Service Manual

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.)
S a t u t s
Miswiring of communication lines between indoor units
The number of
connected indoor or an unconnected wire. (Address setup operation
units is too few.
finished without recognizing a miswired indoor unit.)
The indoor remote controller is not connected with wire.
Miswiring of the indoor remote controller
The number of
outdoor units
connected to a
Indoor remote controller communication circuit trouble.
group is too few in
If 220-240 V is incorrectly applied to the remote
group operation
controller terminal, the remote controller communication
from an indoor
circuit fails.
remote controller.
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C o u t n r e m
After modification of wiring, set up the addresses again and
check the number of connected indoor units.
Using the main indoor remote controller 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.
Using the main indoor remote controller 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
quick connect terminal connected to remote controller
terminals A / B, and check the voltage. If voltage is not applied
(normally 15 to18 V), replace the P.C. board.
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