Toshiba MMK-AP0074MH-E Service Manual page 57

Check code
Wired 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
E28 E28 No. of detected 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.
Detected
Check code name Status
position
I/F No corresponding All stop
indoor unit during
automatic address
I/F No. of connected All stop
indoor 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 All stop
connected during
automatic address
I/F Communication All stop
sending error between
outdoor units
I/F Duplicated outdoor All stop
follower address setup
I/F Decreased number of All stop
connected outdoor
units
I/F Outdoor follower unit All stop
error
<Convenient functions>
Error detection condition
Indoor unit is not found when indoor • Check the communication line connection between indoor and outdoor.
automatic address start was set up.
• Check the electric power line error in indoor.
• Check the noise of surrounding devices.
• Power failure
• Check indoor P .C. board error.
• Total capacity of indoor units • Check the connection capacity of indoor unit.
exceeded 135% of total outdoor
• Check the HP capacity of indoor unit.
capacity.
• Check the indoor/outdoor capacity setup
• No. of connected indoor units
• Check the No. of connected indoor units.
are more than 48 units.
• Check the outdoor I/F P .C. board error
[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 • Check cable of the remote controller.
indoor header and follower units
• Check power cabling of indoor.
• Check P .C. board of indoor.
• There are multiple header The outdoor unit connected with communication cable between indoor and
outdoor units in 1 line.
outdoor (U1.U2) is the outdoor unit.
• There is none of header outdoor • Check connection of communication line between indoor and outdoor.
unit in 1 line.
• Check outdoor P .C. board(I/F) error.
Unit of other line was connected Separate the cable between lines according to automatic address setup
when indoor automatic address
method in "Address setup".
started.
Transmission of other outdoor unit • Check power supply in outdoor unit. (Is power supplied?)
was unavailable for 30 seconds or
• Check connection or disconnection of connecting wire between outdoor units.
more.
• 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
Outdoor addresses manually set [Note]
up are duplicated.
Do not set up the outdoor address manually.
The signal was not returned for • Outdoor backup is being set.
constant from the outdoor unit
• Check power supply of outdoor unit. (Is power supplied?)
which was receiving signal.
• 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.
Outdoor header unit received error • Check the check code of outdoor follower unit.
code from outdoor follower unit.
Check item (position)