Toshiba MMY-MUP0721FT6P-UL Service Manual page 208

Check code
Outdoor 7-segment display
Controller
Check
Sub-code
code
E09 — —
E10 — —
01:
Indoor-outdoor
communication
02:
Outdoor-outdoor
E12 E12
communication
E15 E15 —
00:
Capacity over
01-:
No. of units
connected
E16 E16
— —
E17
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
Location
Description System status
of
detection
Remote Duplicated Stop of
controller master remote corresponding
controller unit
Indoor unit Indoor inter- Stop of
MCU corresponding
communication unit
trouble
I/F Automatic All stop
address starting
trouble
I/F Indoor unit not All stop
found during
automatic
address setting
I/F Too many All stop
indoor units
connected
Indoor unit communication Stop of
trouble between
corresponding
indoor unit(s)
unit(s)
and FS unit(s)
Indoor unit Trouble in Stop of
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
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Check code detection
Check items (locations)
condition(s)
In two remote controller • Check remote controller
configuration (including settings.
wireless), both controllers • Check remote controller
are set up as master. P.C. boards.
(Header indoor unit is shut
down with alarm, while
follower indoor units
continue operating.)
Communication cannot be • Check for failure in
established/maintained upon indoor P.C. board
turning on of power or
during communication.
• Indoor automatic address • Check whether the outdoor
setting is started while unit of other systems or the
automatic address setting indoor unit is connected to
for equipment in other Uv (U1/U2) line or Uc
refrigerant line is in (U5/U6) line.
progress. • Perform automatic address
• Outdoor automatic setting again after
address setting is started disconnecting
while automatic address communication cable to
setting for indoor units is in that refrigerant line.
progress.
Indoor unit cannot be • Check connection of
detected after indoor indoor-outdoor
automatic address setting is communication line.
started. • Check for trouble in indoor
power supply system.
• Check for noise from other
devices.
• Check for power failure.
• Check for failure in indoor
P.C. board.
• Combined capacity of • Check capacities of indoor
indoor units is too large. units connected.
• Check total capacity of
Note: indoor units.
If this code comes up • Check capacity settings of
after backup setting for outdoor units.
outdoor unit failure is • Check No. of indoor units
performed, perform "No connected.
capacity over detected" • Check for failure in outdoor
P.C. board (I/F).
setting.
<"No capacity over detected"
setting method>
Turn on SW103 / Bit 3 on I/F
P.C. board of outdoor header
unit.
For Cooling Only model,
this check code is not
displayed even if it exceeds
the combined capacity of
indoor units.
• More than 128 indoor units
are connected.
• Check order in which
There is no communication
power was turned on.
from FS unit(s)
• Check indoor unit(s)-FS
unit(s) cable.
• Check FS unit port
address setting of indoor
unit.
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 The outdoor unit which
outdoor header units in turned on SW101 and the
one line. bit 1 of the interface P.C.
• There is no outdoor header
board is set to Header unit.
unit in one line. • Check SW101 bit 1 of
follower outdoor unit.
• Check connection of
indoor-outdoor
communication line.
• Check for failure in outdoor
P.C. board (I/F).
Equipment from other line is Check whether the outdoor
found to have been unit of other systems or the
connected when indoor indoor unit is connected to
automatic address setting is Uv (U1/U2) line or Uc
in progress. (U5/U6) line.