Toshiba MML-AP0124H2UL Service Manual page 67

Check code
Main
Outdoor 7-segment display
remote
Check
Sub-code
control
code
#0:Element short circuit IPDU
#1:Position detection
circuit trouble
#3:Motor lock trouble
#4:Motor current trouble
P22 P22
#C:TH sensor
temperature trouble
#D:TH sensor short
circuit/release trouble
#E:Vdc voltage trouble
01: Compressor 1 side
02: Compressor 2 side
P26 P26
01: Compressor 1 side
02: Compressor 2 side
P29 P29
P31 — —
C05 — —
C06 — —
C12 — —
Differs according to
nature of alarm-causing
trouble
P30
(L20 displayed.)
Location
of
Description System status
detection
Outdoor fan All stop
IPDU trouble
*Put in Fan
IPDU No. in [#]
mark
All stop
All stop
All stop
All stop
All stop
All stop
IPDU IPM shortcircuit All stop
protection
trouble
IPDU Compressor All stop
position
detection circuit
trouble
Indoor Other indoor Stop of
unit trouble corresponding
(group follower unit
unit trouble)
TCC-LINK TCC-LINK Continued
central control operation
device
transmission
trouble
TCC-LINK TCC-LINK Continued
central control operation
device reception
trouble
General- Batch alarm Continued
purpose for general- operation
device purpose
I/F device
control interface
TCC-LINK Group control Continued
follower unit operation
trouble
Duplicated Continued
central control operation
address
Trouble detection
condition(s)
(Sub code: #0)
Fan IPDU over current protection
circuit.
Flow of current equal to or greater
than the specified value is detected
during startup of the fan.
(Sub code: #1)
Fan IPDU position detection circuit.
Position detection is not going on
normally.
(Sub code: #3)
Gusty wind, an obstruction, or
another external factor.
Speed estimation is not going on
normally.
(Sub code: #4)
Fan IPDU over current protection
circuit.
Flow of current equal to or greater
than the specified value is detected
during operation of the fan.
(Sub code: #C)
Higher temperature than the
specified value is detected during
operation of the fan.
(Sub code: #D)
The resistance value of the sensor
is infinite or zero (open or short
circuit).
(Sub code: #E)
Fan IPDU DC voltage protection
circuit.
The DC voltage higher or lower
than the specified value is detected.
Overcurrent is momentarily
detected during startup of
compressor.
Position detection is not going on
normally.
There is trouble in other indoor
unit in group, resulting in detection
of E07/L07/L03/L08.
Central control device is unable to
transmit signal.
Central control device is unable to
transmit 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 remote control.)
There is duplication in central
control addresses.
– 67 –
Check items (locations)
• Check fan motor.
• Check for defect in fan IPDU P.C.
board.
• Check fan motor.
• Check connection of fan motor
• connector.
• Check for defect in fan IPDU P.C.
• board.
• Check fan motor.
• Check for defect in fan IPDU P.C.
• board.
• Check fan motor.
• Check connection of fan motor
connector.
• Check for defect in fan IPDU P.C.
board.
• Check fan motor.
• Check for defect in fan IPDU P.C.
board.
• Check for defect in fan IPDU P.C.
board.
• Check power voltage of the main
power supply.
• Check for defect in fan IPDU P.C.
board.
• Check connection of fan IPDU
P.C. board.
• Check connector connection and
wiring on A3-IPDU P.C. board.
• Check for defect in compressor
(layer shortcircuit).
• Check for defect in outdoor P.C.
board (A3-IPDU).
• Check wiring and connector
connection.
• Check for compressor layer
short-circuit.
• Check for defect in A3-IPDU P.C.
board.
• Check indoor P.C. board.
• Check for defect in central control
device.
• Check for defect in central control
communication line.
• Check termination resistance
setting.
• Check for defect in central control
device.
• Check for defect in central control
communication line.
• Check terminator resistor setting.
• Check power supply for devices
at other end of central control
communication line.
• Check defect 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.