Toshiba MMW-UP0271LQ-E Service Manual page 56

Check code
Main Outdoor 7-segment display
remote
Check
Sub-code
controller
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
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
of
detection
Remote Duplicated
controller master remote
controller
Indoor unit Indoor inter-
MCU
communication
trouble
I/F Automatic
address starting
trouble
I/F Indoor unit not
found during
automatic
address setting
I/F Too many
indoor units
connected
Indoor unit Trouble in
communication
between indoor
header and
follower units
I/F Trouble in
number of
outdoor header
units
I/F Connection to
other line found
during
automatic
address setting
Indoor unit (including Hot Water Module)
Check code detection
System status
condition(s)
Stop of In two remote controller
corresponding configuration (including
unit wireless), both controllers
are set up as master.
(Header indoor unit is shut
down with alarm, while
follower indoor units
continue operating.)
Stop of Communication cannot be
corresponding established/maintained upon
unit turning on of power or
during communication.
All stop • Indoor automatic address
setting is started while
automatic address setting
for equipment in other
refrigerant line is in
progress.
• Outdoor automatic
address setting is started
while automatic address
setting for indoor units is in
progress.
All stop Indoor unit cannot be
detected after indoor
automatic address setting is
started.
All stop • Combined capacity of
indoor units is too large.
Note:
If this code comes up
after backup setting for
outdoor unit failure is
performed, perform "No
capacity over detected"
setting.
<"No capacity over detected"
setting method>
Turn on SW09 or 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.
Stop of Periodic communication
corresponding between indoor header and
unit follower units cannot be
maintained.
All stop • There are more than one
outdoor header units 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.
– 56 –
Check items (locations)
• Check remote controller
settings.
• Check remote controller
P.C. boards.
• Check for failure in
indoor P.C. board
• Check whether the outdoor
unit of other systems or the
indoor unit is connected to
Uv (U1/U2) line or Uc
(U5/U6) line.
• Perform automatic address
setting again after
disconnecting
communication cable to
that refrigerant line.
• Check connection of
indoor-outdoor
communication line.
• 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.
• Check capacities of indoor
units connected.
• Check combined HP
capacities of indoor units.
• Check HP capacity
settings of outdoor units.
• Check No. of indoor units
connected.
• Check for failure in outdoor
P.C. board (I/F).
• Check remote controller
wiring.
• Check indoor power supply
wiring.
• Check P.C. boards of
indoor units.
The outdoor unit which
turned on SW101 and the
bit 1 of the interface P.C.
board is set to Header unit.
• 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).
Check whether the outdoor
unit of other systems or the
indoor unit is connected to
Uv (U1/U2) line or Uc
(U5/U6) line.