Toshiba MMU-UP0051MH-E(TR) Service Manual page 116

Check codes Detected by Central Control Device
Check code
Main Outdoor 7-segment display
remote
Check
Sub-code
controller
code
C05 —
C06 —
C12 —
Differs according to
nature of alarm-causing
trouble
P30
(L20 displayed.)
Location
Description
of
detection
Central Central control Continued
control device operation
device transmission
trouble
Central Central control Continued
control device reception operation
device trouble
General- Batch alarm Continued
purpose for general- operation
device purpose
I/F device
control interface
Central Group control Continued
control follower unit operation
device trouble
Duplicated Continued
central control operation
address
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Check code detection
System status
condition(s)
Central control device is
unable to transmit signal.
Central control device is
unable to receive signal.
Trouble signal is input to
control interface for general-
purpose devices.
Trouble occurs in follower
unit under group control.
([P30] is displayed on central
control remote controller.)
There is duplication in
central control addresses.
Check items (locations)
• Check for failure in central
control device.
• Check for failure in central
control communication line.
• Check termination
resistance setting.
• Check for failure in central
control device.
• Check for failure in central
control communication line.
• Check terminator resistor
setting.
• Check power supply for
devices at other end of
central control
communication line.
• Check failure in P.C.
boards of devices at other
end of central control
communication line.
• Check trouble input.
• Check check code of unit
that has generated alarm.
• Check address settings.