Toshiba MMY-MAP1006FT8(J)P-E Service Manual page 166

Check code
Outdoor 7-segment display
Main
remote
Check
Sub-code
controller
code
E18 – –
00:
No header unit
02:
Two or more header units
E19 E19
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
of Description System status
detection
Indoor Trouble in Stop of
unit communication corresponding
between indoor unit
header and
follower units
I/F Trouble in All stop
number of
outdoor header
units
I/F Connection to All stop
other line found
during
automatic
address setting
I/F Outdoor- All stop
outdoor
communication
transmission
trouble
I/F Duplicated All stop
follower outdoor
address
I/F Signal lack of All stop
outdoor unit
I/F Outdoor All stop
follower unit
trouble
− 165 −
Check code detection
Check items (locations)
condition(s)
Periodic communication • Check remote controller
between indoor header and wiring.
follower units cannot be • Check indoor power supply
maintained. wiring.
• Check P.C. boards of
indoor units.
• There are more than one Outdoor header unit is
outdoor header units in outdoor unit to which indoor-
one line. outdoor tie cable (U1,U2) is
• There is no outdoor header connected.
unit in one line. • Check connection of
indoor-outdoor
communication line.
• Check for defect in outdoor
P.C. board (I/F).
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 "Address
in progress. setting" section.
Signal cannot be transmitted • Check power supply to
to other outdoor units for at outdoor units. (Is power
least 30 seconds turned on?)
continuously. • 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.
There is duplication in
Note:
outdoor addresses set
Do not set outdoor
manually.
addresses manually.
Outdoor unit initially • Backup setting is being
communicating normally fails used for outdoor units.
to return signal for specified • Check power supply to
length of time. 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 trouble in outdoor
P.C. board (I/F).
Outdoor header unit receives • Check check code
check code from outdoor displayed on outdoor
follower unit. follower unit.
<Convenient functions>
If SW04 is pressed and held
for at least 1 second while
[E28] is displayed on the 7-
segment display of outdoor
header unit, the fan of the
outdoor unit that has been
shut down due to a trouble
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.