Toshiba Super MMU-AP0091H Service Manual page 137

Check code
Main Outdoor 7-segment display
remote
Check code Sub-code
controller
E12 E12 01: Indoor/outdoor
communication
02: Between outdoors
communication
E15 E15 —
E16 E16 00: Capacity over
01 to: No. of connected units
E18 — —
E19 E19 00: No header unit
02: Two or more header units
E20 E20 01: Connection of outdoor of
other line
02: Connection of indoor of
other line
E23 E23 —
Detected
AI-NET Check code name
position
central control
remote controller
42 I/F Automatic address start error
42 I/F No corresponding indoor unit
during automatic address
89 I/F No. of connected indoor units /
Capacity over
97, 99 Indoor Communication error between
unit indoor header and follower
units
96 I/F Outdoor header unit quantity
error
42 I/F Other line unit connected
during automatic address
15 I/F Communication sending error
between outdoor units
Status Error detection condition
All stop • When indoor automatic
address started, other
refrigerant circuit system was
setting automatic address.
• When outdoor automatic
address started, indoor
automatic address was
executed.
All stop Indoor unit is not found when
indoor automatic address start
was set up.
All stop • Total capacity of indoor units
exceeded 135% of total
outdoor capacity.
• No. of connected indoor units
are more than 48 units.
[Note]
If this code appears after backup
setup of outdoor unit trouble, set
up "No capacity-over detection".
<Setup method of "No
capacity-over detection">
Turn on SW09/Bit 2 on I/F P .C.
board of outdoor header unit.
Corresponding Regular communication between
unit only stops. indoor header and follower units .
All stop • There are multiple outdoor
header units in 1 line.
• There is none of outdoor
header unit in 1 line.
All stop Unit of other line was connected
when indoor automatic address
started.
Transmission of other outdoor
All stop
unit was unavailable for 30
seconds or more.
Check item (position)
• Setup the address again after disconnecting
communication connection with other refrigerant
circuit system.
• Check the communication line connection
between indoor and outdoor.
• Check the electric power line error in indoor.
• Check the noise of surrounding devices.
• Power failure
• Check indoor P .C. board error.
• Check the connection capacity of indoor unit.
• Check the HP capacity of indoor unit.
• Check the indoor/outdoor capacity setup
• Check the No. of connected indoor units.
• Check the outdoor I/F P .C. board error
• Check cable of the remote controller.
• Check power cabling of indoor.
• Check P .C. board of indoor.
The outdoor unit connected with communication
cable between indoor and outdoor (U1.U2) is the
outdoor header unit.
• Check connection of communication line
between indoor and outdoor.
• Check outdoor P .C. board(I/F) error.
Separate the cable between lines according to
automatic address setup method in
"Address setup".
• Check the power of outdoor unit. (Is the power
turned on?)
• Check connection of communication wire or
disconnection between outdoor units.
• Check the connector for communication on
outdoor P .C. board.
• Check outdoor P .C. board (I/F) error.
• Check the end terminal resistance setup for
communication between outdoor units.