Toshiba MML-AP0074BH2UL Service Manual Download

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Main

remote
control

Check code

P22

#0:Element short circuit IPDU

Outdoor fan
IPDU trouble
*Put in Fan
IPDU No. in [#]
mark

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.

• Check fan motor.
• Check for defect in fan IPDU P.C.
board.

#1:Position detection
circuit trouble

All stop

(Sub code: #1)
Fan IPDU position detection circuit.
Position detection is not going on
normally.

• Check fan motor.
• Check connection of fan motor
• connector.
• Check for defect in fan IPDU P.C.
• board.

#3:Motor lock trouble

All stop

(Sub code: #3)
Gusty wind, an obstruction, or
another external factor.
Speed estimation is not going on
normally.

• Check fan motor.
• Check for defect in fan IPDU P.C.
• board.

#4:Motor current trouble

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.

• Check fan motor.
• Check connection of fan motor
connector.
• Check for defect in fan IPDU P.C.
board.

#C:TH sensor
temperature trouble

All stop

(Sub code: #C)
Higher temperature than the
specified value is detected during
operation of the fan.

• Check fan motor.
• Check for defect in fan IPDU P.C.
board.

#D:TH sensor short
circuit/release trouble

All stop

(Sub code: #D)
The resistance value of the sensor
is infinite or zero (open or short
circuit).

• Check for defect in fan IPDU P.C.
board.

#E:Vdc voltage trouble

All stop

(Sub code: #E)
Fan IPDU DC voltage protection
circuit.
The DC voltage higher or lower
than the specified value is detected.

• 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.

P31

—

Indoor
unit

Other indoor
trouble
(group follower
unit trouble)

Stop of
corresponding
unit

There is trouble in other indoor
unit in group, resulting in detection
of E07/L07/L03/L08.

• Check indoor P.C. board.

C05

—

TCC-LINK TCC-LINK

central control
device
transmission
trouble

Continued
operation

Central control device is unable to
transmit signal.

• Check for defect in central control
device.
• Check for defect in central control
communication line.
• Check termination resistance
setting.

C06

—

TCC-LINK TCC-LINK

central control
device reception
trouble

Continued
operation

Central control device is unable to
transmit signal.

• 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.

C12

—

General-
purpose
device
I/F

Batch alarm
for general-
purpose
device
control interface

Continued
operation

Trouble signal is input to control
interface for general-purpose
devices.

• Check trouble input.

P30

TCC-LINK

Differs according to
nature of alarm-causing
trouble

Group control
follower unit
trouble

Continued
operation

Trouble occurs in follower unit
under group control. ([P30] is
displayed on central remote control.)

• Check check code of unit that has
generated alarm.

(L20 displayed.)

Duplicated
central control
address

Continued
operation

There is duplication in central
control addresses.

• Check address settings.

P26

01: Compressor 1 side
02: Compressor 2 side

IPDU

IPM shortcircuit
protection
trouble

All stop

Overcurrent is momentarily
detected during startup of
compressor.

• 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).

P29

01: Compressor 1 side
02: Compressor 2 side

IPDU

Compressor
position
detection circuit
trouble

All stop

Position detection is not going on
normally.

• Check wiring and connector
connection.
• Check for compressor layer
short-circuit.
• Check for defect in A3-IPDU P.C.
board.

Outdoor 7-segment display

Check

code

Sub-code

Location