Toshiba MMD-AP0726HP-UL Service Manual page 60

Check code
Outdoor 7-segment display
Main
remote
Check
Sub-code
control
code
Duplicated indoor address
E08 E08
E09 – –
E10 – –
Communication
trouble between
Application control
kit and indoor unit
E11 –
01:
Indoor-outdoor
communication
02:
Outdoor-outdoor
E12 E12
communication
E15 E15 –
00:
Overloading
01-:
No. of units connected
E16 E16
Location
of Description System status
detection
Indoor Duplicated All stop
unit indoor address
I/F
Remote Duplicated Stop of
control master remote corresponding
control unit
UART
Indoor Stop of
unit corresponding
communication
trouble
unit
Stop
Indoor
Indoor
unit
Application
control P.C.Board
communication
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
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Trouble detection
Check items (locations)
condition(s)
More than one indoor unit • Check indoor addresses.
are assigned same address.
Check for any change
•
made to remote control
connection (group/
individual) since indoor
address setting.
In two remote control • Check remote control
configuration (including settings.
• Check remote control
wireless), both control are set
P.C. Boards.
up as master. (Header
indoor unit is shut down with
alarm, while follower indoor
units continue operating.)
Communication cannot be • Check for defect in indoor
established/maintained upon P.C. Board
turning on of power or during
(MCC-1643 and MCC-1610)
communication.
Displayed when trouble is
1. Check connector indoor
unit (CN521(red))
detected
Application control
P.C.Board (CN1 (red))
2.
Check connection of
indoor-Application control
kit communication line.
3. Check indoor P.C. Board.
4. Check Application control
P.C. Board.
• Indoor automatic address • Perform automatic address
setting is started while setting again after
automatic address setting disconnecting
for equipment in other communication cable to
refrigerant line is in that refrigerant line.
progress.
• Outdoor automatic
address setting is started
while automatic address
setting for indoor units is in
progress.
Indoor unit cannot be • Check connection of
indoor-outdoor
detected after indoor
communication line.
automatic address setting is • Check for trouble in indoor
started.
power supply system.
• Check for noise from other
devices.
• Check for power failure.
• Check for defect in indoor
P.C. Board.
• Combined capacity of • Check capacities of indoor
indoor units exceeds 135% units connected.
of combined capacity of • Check combined HP
capacities of indoor units.
outdoor units.
• Check HP capacity
Note:
settings of outdoor units.
If this code comes up
• Check No. of indoor units
after backup setting for
connected.
outdoor unit failure is
• Check for defect in outdoor
performed, perform "No
P.C. Board (I/F).
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 64 indoor units
are connected.