Toshiba MMW-AP0271LQ-E Service Manual page 47

Check code
Main Outdoor 7-segment display
remote
Check
Sub-code
controller
code
01:
Indoor-outdoor
communication
02:
Outdooroutdoor
communication
E12 E12
E15 E15 —
00:
Overloading
01-:
No. of units
connected
E16 E16
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 —
When the indoor unit connection capacity is calculated, AP005 is calculated as 0.8 HP.
Location
Description
of
detection
I/F Automatic
address starting
error
I/F Indoor unit not
found during
automatic
address setting
I/F Too many
indoor units
connected
Indoor unit Error in
communication
between indoor
header and
follower units
I/F Error in number
of outdoor
header units
I/F Connection to
other line found
during
automatic
address setting
I/F Outdooroutdoor
communication
transmission
error
Error detection
System status
condition(s)
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 exceeds 135%
of combined capacity of
outdoor units.
Note:
If this code comes up
after backup setting for
outdoor unit failure is
performed, perform "No
overloading detected"
setting.
<"No overloading detected"
setting method>
Turn on SW09/Bit 2 on I/F
P.C. board of outdoor
header unit.
• More than 48 indoor units
are connected.
Stop of Periodic communication
corresponding unit between indoor header and
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.
– 47 –
Indoor unit (including Hot Water Module)
Check items (locations)
• Perform automatic address
setting again after
disconnecting
communication cable to
that refrigerant line.
• Check connection of
indoor-outdoor
communication line.
• Check for error in indoor
power supply system.
• Check for noise from other
devices.
• Check for power failure.
• Check for defect 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 defect in outdoor
P.C. board (I/F).
• 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.