Toshiba MMD- AP0724H2UL Service Manual page 69

Check code
Outdoor 7-segment display
Main
remote
Check
Sub-code
controller
code
0 : IGBT circuit
1 : Position
detection circuit
error
3 : Motor lockup
error
4 : Motor current
detection
C : TH sensor
temperature
error
D : TH sensor
error
E : Inverter DC
voltage error
(outdoor fan)
Note:
Although
letters 0 to F
appear at
locations
P22 P22
indicated by
" ", please
ignore them.
01: Compressor
1 side
02: Compressor
2 side
P26 P26 03: Compressor
3 side
01: Compressor
1 side
02: Compressor
P29 P29
2 side
03: Compressor
3 side
P31 – –
Location
AI-NET central
of Description
control
detection
remote
controller
IPDU Outdoor fan
IPDU error
1A
IPDU G-TR short-
circuit protection
error
14
IPDU Compressor
position
detection circuit
16
error
Indoor Other indoor
unit error
47
(group follower
unit error)
Error detection
System status
All stop (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.
All stop (Sub code: 1 )
Fan IPDU position detection
circuit
Position detection is not
going on normally.
All stop (Sub code: 3 )
Gusty wind, an obstruction,
or another external factor
Speed estimation is not
going on normally.
All stop (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.
All stop (Sub code: C )
Higher temperature than the
specified value is detected
during operation of the fan.
All stop (Sub code: D )
The resistance value of the
sensor is infinite or zero
(open or short circuit).
All stop (Sub code: E )
Fan IPDU DC voltage
protection circuit
The DC voltage higher or
lower than the specified
value is detected.
All stop Overcurrent is momentarily
detected during startup of
compressor.
All stop Position detection is not
going on normally.
Stop of There is error in other indoor
corresponding unit in group, resulting in
unit detection of E07/L07/L03/
L08.
– 69 –
Check items (locations)
condition(s)
• 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 short-
circuit).
• 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.