Toshiba MMY-MAP0804HT8(Z)(ZG)-E Service Manual page 181

Check code
Outdoor 7-segment display
Main
remote
Check
Sub-code
controller
code
E18 – –
00:
No header unit
02:
Two or more
E19 E19 header units
01:
Connection of
outdoor unit
from other line
E20 E20
02:
Connection of
indoor unit from
other line
E23 E23 –
E25 E25 –
Address of
outdoor unit
from which
signal is not
received
normally
E26 E26
Detected
outdoor unit
No.
E28 E28
Location
AI-NET central
of Description
control
detection
remote
controller
Indoor Error in
unit communication
between indoor
97·99
header and
follower units
I/F Error in number
of outdoor
header units
96
I/F Connection to
other line found
during
automatic
42
address setting
I/F Outdoor-
outdoor
communication
transmission
error
15
I/F Duplicated
15 follower outdoor
address
I/F Dropping out of
outdoor unit
15
I/F Outdoor
follower unit
error
d2
Error detection
System status
condition(s)
Stop of Periodic communication
corresponding between indoor header and
unit follower units cannot be
maintained.
All stop • There is more than one
outdoor header unit in one
line.
• There is no outdoor header
unit in one line.
All stop Equipment from other line is
found to have been
connected when indoor
automatic address setting is
in progress.
All stop Signal cannot be transmitted
to other outdoor units for at
least 30 seconds
continuously.
All stop There is duplication in
outdoor addresses set
manually.
All stop Outdoor unit initially
communicating normally fails
to return signal for specified
length of time.
All stop Outdoor header unit receives
error code from outdoor
follower unit.
180
Check items (locations)
• Check remote controller
wiring.
• Check indoor power supply
wiring.
• Check P.C. boards of
indoor units.
Outdoor header unit is
outdoor unit to which indoor-
outdoor tie cable (U1,U2) is
connected.
• Check connection of
indoor-outdoor
communication line.
• Check for defect in outdoor
P.C. board (I/F).
Disconnect inter-line tie cable
in accordance with automatic
address setting method
explained in "Address
setting" section.
• Check power supply to
outdoor units. (Is power
turned on?)
• Check connection of tie
cables between outdoor
units for bad contact or
broken wire.
• Check communication
connectors on outdoor
P.C. boards.
• Check for defect in outdoor
P.C. board (I/F).
• Check termination
resistance setting for
communication between
outdoor units.
Note:
Do not set outdoor
addresses manually.
• Backup setting is being
used for outdoor units.
• Check power supply to
outdoor unit. (Is power
turned on?)
• Check connection of tie
cables between outdoor
units for bad contact or
broken wire.
• Check communication
connectors on outdoor
P.C. boards.
• Check for defect in outdoor
P.C. board (I/F).
• Check check code
displayed on outdoor
follower unit.
<Convenient functions>
If SW04 is pressed and held
for at least 1 second while
[E28] is displayed on the 7-
segmentdisplay of outdoor
header unit, the fan of the
outdoor unit that has been
shut down due to an error
comes on.
If SW04 and SW05 are
pressed simultaneously, the
fans of normal outdoor units
come on.
To stop the fan or fans, press
SW05 on its own.