Toshiba SUPER MMK-AP0073H (IN) Service Manual page 82

Check code
[E18] / [97/99]
(Current code / AI-NET)
Are remote controller
inter-unit cables (A/B) normal?
Is there any disconnection of
connector or wiring from terminal block
of indoor unit?
NO
Is a group control operation?
Are powers of
all indoor units turned on?
Is setup of the model SELECT SW
(SW02) on wall type P.C. board of normal?
Bit 1: ON
Bit 2: OFF
Check indoor address.
Correct indoor address.
Check code name
Communication error between
indoor header and follower
NO
YES
YES
NO
YES
NO
YES
NO
YES
Cause of operation
1. Regular communication between indoor header
and follower is unavailable.
2. Switch setup error of wall type P.C. board
Correct connection of connector.
82
Correct remote controller
inter-unit wire.
Check circuit wire.
Check power connection status
of indoor unit.
Correct switch setup.
Check indoor P.C. board.
Failure → Replace