Toshiba MMU-AP0072H2UL Service Manual page 89

Check code
Outdoor 7-segment display
Main
remote
Check code Sub-code
controller
Duplicated
indoor address
E08 E08
E09 –
E10 –
01:
Indoor-outdoor
communication
02:
Outdoor-
E12 E12 outdoor
communication
E15 E15
00:
Overloading
01-:
No. of units
connected
E16 E16
Location
of Description
detection
Indoor Duplicated
unit indoor address
I/F
Remote Duplicated
controller master remote
controller
–
Indoor Indoor inter-
unit MCU
–
communication
error
I/F Automatic
address starting
error
I/F Indoor unit not
found during
automatic
address setting
–
I/F Too many
indoor units
connected
Error detection
System status
condition(s)
All stop More than one indoor unit is
assigned same address.
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 exceeds 125%
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.
89
Check items (locations)
• Check indoor addresses.
• Check for any change
made to remote controller
connection (group/
individual) since indoor
address setting.
• Check remote controller
settings.
• Check remote controller
P.C. boards.
• Check for defect in indoor
P.C. board
• 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).