Toshiba MMD-AP0186HP1-E Service Manual page 68

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
Description System status
of
detection
Indoor Error in Stop of
unit communication corresponding
between indoor unit
header and
follower units
I/F Error in number All stop
of outdoor
header units
I/F Connection to All stop
other line found
during
automatic
address setting
I/F Outdooroutdoor All stop
communication
transmission
error
I/F Duplicated All stop
follower outdoor
address
I/F Dropping out of All stop
outdoor unit
I/F Outdoor All stop
follower unit
error
– 68 –
Error detection
Check items (locations)
condition(s)
Periodic communication
between indoor header and
follower units cannot be
maintained.
There is more than one Outdoor header unit is
outdoor unit to which indoor
outdoor header unit in one
outdoortie cable (U1,U2) is
line.
There is no outdoor header connected.
unit in one line.
Equipment from other line is Disconnect inter-line tie cable
found to have been in accordance with automatic
connected when indoor address setting method
automatic address setting is explained in gAddress
in progress. setting h section.
Signal cannot be transmitted
to other outdoor units for at
least 30 seconds
continuously.
Note:
There is duplication in
Do not set outdoor
outdoor addresses set
addresses manually.
manually.
Outdoor unit initially
communicating normally fails
to return signal for specified
length of time.
Outdoor header unit receives
error code from 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.
Check remote controller
wiring.
Check indoor power supply
wiring.
Check P.C. boards of
indoor units.
Check connection of
indoor-outdoor
communication line.
Check for defect in outdoor
P.C. board (I/F).
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.
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.