Toshiba MCY-MUG0401HSW-E Service Manual page 183

Check code
Outdoor 7-segment display
Controller
Check
Sub-code
code
Differs according to
nature of alarm-causing
trouble
P30
(L20 displayed.)
P31 — —
S01 — —
Location of
Description
detection
Central Group control
control follower unit
device trouble
Duplicated
central control
address
Other indoor
trouble (group
Indoor unit
follower unit
trouble)
Central Central control
control device reception
device trouble
Check code detection
System status
condition(s)
Trouble occurs in follower
unit under group control.
Continued
([P30] is displayed on
operation
central control remote
controller.)
Continued There is duplication in
operation central control addresses.
There is trouble in other
Stop of
indoor unit in group,
corresponding
resulting in detection of
unit
E07/L07/L03/L08.
Continued Central control device is
operation unable to receive signal.
182
Check items (locations)
• Check check code of unit that
has generated alarm.
• Check address settings.
• Check indoor P.C. board.
• Check for failure in central
control device.
• Check for failure in central
control communication line.
• Check termination 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.