Toshiba Super MMU-AP0092H Service Manual page 96

Check code
Main Outdoor 7-segment display
remote
Check code Auxiliary code
controller
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 —
E25 E25 —
E26 E26 No. of normally received outdoor units
When pushing SW04 for 1 second or more under condition that [E28] is displayed on 7-segment display of outdoor header unit, the fan of
outdoor unit which stopped abnormally starts rotating.
If pushing SW04 and SW05 simultaneously, the fan of normal outdoor unit operates. When pushing SW05 singly, the operation of fan is cleared.
E28 E28 No. of detected outdoor units
Detected
Check code name Status
position
I/F No corresponding indoor All stop
unit during automatic
address
I/F No. of connected indoor All stop
units / Capacity over
Indoor Communication error Corresponding
unit between indoor header unit only stops.
and follower units
I/F Header outdoor unit All stop
quantity error
I/F Other line unit connected All stop
during automatic address
I/F Communication sending All stop
error between outdoor
units
I/F Duplicated outdoor All stop
follower address setup
I/F Decreased number of All stop
connected outdoor units
<Convenient functions>
I/F Outdoor follower unit error All stop
Error detection condition
Indoor unit is not found when indoor automatic
address start was set up.
• 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.
Regular communication between indoor header
and follower units
• There are multiple header outdoor units in
1 line.
• There is none of header outdoor unit in 1 line.
Unit of other line was connected when indoor
automatic address started.
Transmission of other outdoor unit was
unavailable for 30 seconds or more.
Outdoor addresses manually set up are
duplicated.
The signal was not returned for constant from
the outdoor unit which was receiving signal.
Outdoor header unit received error code from
outdoor follower unit.
Check item (position)
• 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 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 power supply in outdoor unit. (Is power supplied?)
• Check connection or disconnection of connecting wire
between outdoor units.
• Check connection of connector for outdoor P .C. board
communication.
• Check outdoor P .C. board (I/F) error.
• Check terminal resistance setting of communication
between outdoor units
[Note]
Do not set up the outdoor address manually.
• Outdoor backup is being set.
• Check power supply of outdoor unit. (Is power supplied?)
• Check connection or disconnection of connecting wire
between outdoor units.
• Check connection of connector for outdoor P .C. board
communication.
• Check outdoor P .C. board (I/F) error.
• Check the check code of outdoor follower unit.