Toshiba MMD-AP0726HP-UL Service Manual page 72

Check code
Outdoor 7-segment display
Main
remote
Check
Sub-code
control
code
#0:Element short circuit
#1:Position detection circuit
trouble
#3:Motor lock trouble
P22 P22
#4:Motor current trouble
#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 – –
Location
of Description System status
detection
Outdoor fan
IPDU
All stop
IPDU trouble
*Put in Fan
IPDU No. in [#]
mark
All stop
All stop
All stop
All stop
All stop
All stop
IPM short-
IPDU All stop
circuit protection
trouble
IPDU Compressor All stop
position
detection circuit
trouble
Indoor Other indoor Stop of
trouble
unit corresponding
(group follower unit
unit trouble)
- 72 -
Trouble detection
Check items (locations)
condition(s)
(Sub code: #0)
Fan IPDU over current
• Check fan motor.
protection circuit
• Check for defect in fan IPDU
Flow of current equal to or
P.C. board.
greater than the specified
value is detected during
startup of the fan.
(Sub code: #1)
• Check fan motor.
• Check connection of fan
Fan IPDU position
motor connector.
detection circuit Position
• Check for defect in fan IPDU
detection is not going on
P.C. board.
normally.
(Sub code: #3)
Gusty wind, an obstruction,
Check fan motor.
•
or another external factor
Check for defect in fan IPDU
•
Speed estimation is not P.C. board.
going on normally.
(Sub code: #4)
• Check fan motor.
Fan IPDU over current
• Check connection of fan
protection circuit
motor connector.
Flow of current equal to or
• Check for defect in fan IPDU
greater than the specified
P.C. board.
value is detected during
operation of the fan.
(Sub code: #C)
Higher temperature than
• Check fan motor.
the specified value is
• Check for defect in fan IPDU
detected during operation
P.C. board.
of the fan.
(Sub code: #D)
Check for defect in fan
•
The resistance value of
IPDU P.C. board.
the sensor is infinite or
zero (open or short circuit).
Check power voltage of
•
(Sub code: #E)
the main power supply.
Fan IPDU DC voltage
Check for defect in fan IPDU
•
protection circuit
P.C. board.
The DC voltage higher or
• Check connection of fan
lower than the specified
IPDU P.C. board.
value is detected.
Overcurrent is momentarily • Check connector
detected during startup of connection and wiring on
compressor. A3-IPDU P.C. board.
• Check for defect in
compressor (layer short-
circuit).
• Check for defect in
outdoor P.C. board (A3-
IPDU).
Position detection is not • Check wiring and
going on normally. connector connection.
• Check for compressor
layer short-circuit.
• Check for defect in A3-
IPDU P.C. board.
There is trouble in other
• Check indoor P.C. board.
indoor unit in group,
resulting in detection of
E07/L07/L03/L08.