Toshiba MMK-AP0074MH-E Service Manual page 56

8-4. Check Code and Check Position Displayed on the Remote Controller and Outdoor Unit
(7-Segment Display of Interface)
<In case of SUPER MODULAR MULTI SYSTEM>
Check code
Wired Outdoor 7-segment display
remote
controller Check code Auxiliary code
E01 — —
E02 — —
E03 — —
E04 — —
E06 E06 No. of indoor units
which received
signal normally
— E07 —
E08 E08 Duplicated indoor
addresses
E09 — —
E10 — —
E12 E12 01: Indoor/outdoor
communication
02: Between outdoors
communication
Detected
Check code name Status
position
Remote Communication error between Corresponding
controller indoor and remote controller unit only stops.
(Detected at remote controller
side)
Remote Remote controller sending Corresponding
controller error unit only stops.
Indoor Communication error between Corresponding
unit indoor and remote controller unit only stops.
(Detected at indoor side)
Indoor Indoor/outdoor communication Corresponding
unit circuit error unit only stops.
(Detected at indoor side)
I/F Decreased number of indoor All stop
units
Indoor/outdoor communication
I/F All stop
circuit error
(Detected at outdoor side)
Indoor Duplicated indoor addresses All stop
I/F
Remote Duplicated master remote Corresponding
controller controllers unit only stops.
Indoor Communication error between Corresponding
unit indoor P .C. board assembly unit only stops.
I/F Automatic address start error All stop
Error detection condition
Communication interrupted between indoor • Check remote controller inter-unit cable (A/B).
P .C. board and remote controller.
• Check disconnection, connector contact error.
• Check indoor power supply.
• Check indoor P .C. board error.
• Check remote controller address setup.
(When two remote controllers operate)
• Check remote controller P .C. board.
Signal could not be sent from remote • Check the communication wire of remote controller:
controller to indoor unit. Exchange remote controller.
No communication from remote controller • Check remote controller and communication adapter wiring.
(including wireless) and communication
adapter.
Indoor unit does not receive communication • Check power-ON order of indoor/outdoor.
from outdoor unit.
• Check indoor address setup.
• Check inter-unit cabling between indoor and outdoor.
• Check outdoor end terminal resistance setup (SW30-2).
When signal is not sent for a certain period • Check the power supply of indoor unit. (Power-ON)
from the indoor unit which has been used to
• Check connection of communication line between indoor and outdoor.
send signals.
• Check connector connection for communication in indoor P .C. board.
• Check connector connection for communication in outdoor P .C. board.
• Check indoor P .C. board failure.
• Check outdoor P .C. board (I/F) failure.
Transmission from outdoor to indoor cannot • Check outdoor terminator resistor setup (SW30-2).
continue for 30 seconds.
• Check the communication connection between indoor and outdoor.
Multiple indoor unit address setup are
• Check indoor address.
duplicated.
• Check the change of remote controller connection (Group / individual)
after setup of indoor address.
In 2-remote controller control (including • Check remote controller setup.
wireless), both are setup as master
• Check remote controller P .C. board.
(Header indoor unit stops and other indoor
unit is operating.)
Communication was not succeeded after • Indoor P .C. board failure
power was supplied or during
communication.
• When indoor automatic address started, • Setup the address again after disconnecting communication
other refrigerant circuit system was setting connection with other refrigerant circuit system.
automatic address.
• When outdoor automatic address started,
indoor automatic address was executed.
Check item (position)