Toshiba MMD-AP0481HF2UL Service Manual page 97

Check codes and parts to be checked
Check method
On the remote control (Wired remote control, Central control remote control) and the interface P.C. board of the
outdoor unit (I/F), a check display LCD (Remote control) or 7-segment display (on the outdoor interface P.C. board)
to display the operation is provided. Therefore the operation status can be known. With this self-diagnosis function,
a trouble or position with trouble of the air conditioner can be found as shown in the table below.
Check code list
The following list shows each check code. Find the check contents from the list according to part to be checked.
• To check from indoor remote control: See "Wired remote control display" in the list.
• To check from outdoor unit: See "Outdoor 7-segment display" in the list.
• To check from indoor unit with a wireless remote control: See "Sensor block display of receiving unit" in the list.
Check code
Outdoor 7-segment display
Wired remote
control display
Auxiliary code
E01 — —
E02 — —
E03 — —
E04 — —
E06 No. of indoor units in which sensor has been normally
E06
received
— E07 —
E08 E08 Duplicated indoor addresses
E09 — —
E10 — —
01: Indoor / Outdoor communication
E12 E12
02: Communication between outdoor units
E15 E15 —
E16 00: Capacity over
E16
01 ~:No. of connected units
E18 — —
00: Header is nothing
E19 E19
02: Two or more header units
01: Outdoor of other line connected
E20 E20
02: Indoor of other line connected
E23 E23 —
E25 E25 —
E26 E26 No. of outdoor units which received signal normally
E28 E28 Detected outdoor unit number
33-EN
IPDU : Intelligent Power Drive Unit
: Lighting, : Flashing, : Goes off
ALT : Flashing is alternately when there are two flashing LED.
SIM : Simultaneous flashing when there are two flashing LED.
Wireless remote control
Sensor block display of
Check code name
receiving unit
Operation Timer Ready Flash
Communication trouble between indoor
and remote control
(Detected at remote control side)
Remote control transmission trouble
Communication trouble between indoor
and remote control (Detected at indoor
side)
Communication circuit trouble between
indoor / outdoor (Detected at indoor
side)
Decrease of No. of indoor units
Communication circuit trouble between
indoor / outdoor (Detected at outdoor
side)
Duplicated indoor addresses Indoor / I/F
Duplicated header remote controls
Communication trouble between indoor
MCU
Automatic address start trouble
Indoor is nothing during automatic
addressing
Capacity over / No. of connected indoor units
Combined capacity of indoor units
exceeds 120% of combined capacity of
outdoor units. (SMMS-i only)
Communication trouble between indoor units
Outdoor header units quantity trouble
Other line connected during automatic
address
Sending trouble in communication
between outdoor units
Duplicated follower outdoor addresses
Decrease of No. of connected outdoor units
Follower outdoor unit trouble
– 17 –
Check code
Outdoor 7-segment display
Wired remote
control display
Auxiliary code
A3-IPDU
Sub-
code
1 2
01
02
03
04
05
E31 E31
06
07
08
09
0A
0B
Judging
0C
device
Remote
control
F01 —
Remote
F02 —
control
F03 —
Indoor F04 F04
F05 F05
TE1 sensor
Indoor
F06 F06
TE2 sensor
F07 F07
I/F
F08 F08
01: TG1
I/F F09 F09
02: TG2
F10 —
F11 — TF sensor
Remote
control
01: TS1 sensor
F12 F12
03: TS3 sensor
Indoor
01: Comp. 1 side
F13 F13 02: Comp. 2 side
I/F 03: Comp. 3 side
F15 F15
I/F
F16 F16
F22 F22
I/F
F23 F23
F24 F24
Indoor
F29 —
I/F
F31 F31
01: Comp. 1 side
I/F H01 H01 02: Comp. 2 side
03: Comp. 3 side
I/F
01: Comp. 1 side
H02 H02 02: Comp. 2 side
03: Comp. 3 side
I/F
01: Comp. 1 side
I/F
H03 H03 02: Comp. 2 side
I/F 03: Comp. 3 side
H05 H05
H06 H06
H07 H07
Wireless remote control
Sensor block display of
receiving unit
Operation Timer Ready Flash
Fan- Fan-
A3-IPDU
IPDU Sub- IPDU
code
3 1 2 1 2 3 1 2
0D
0E
0F
11
12
IPDU communication trouble
13
18
19
1A
1B
Circle ( ): IPDU trouble
— ALT Indoor TCJ sensor trouble
— ALT Indoor TC2 sensor trouble
— ALT Indoor TC1 sensor trouble
— ALT TD1 sensor trouble
— ALT TD2 sensor trouble
TE1 sensor trouble
ALT
TE2 sensor trouble
— ALT TL sensor trouble
— ALT TO sensor trouble
TG1 sensor trouble
TG2 sensor trouble
— ALT Indoor TA sensor trouble
ALT TF sensor trouble
ALT TS1 sensor trouble, TS3 sensor trouble
ALT TH sensor trouble
— ALT Outdoor temp. sensor miswiring (TE1, TL)
— ALT Outdoor pressure sensor miswiring (Pd, Ps)
— ALT TD3 trouble
— ALT Ps sensor trouble
— ALT Pd sensor trouble
— SIM Indoor other trouble
— SIM Indoor EEPROM trouble
Compressor break down
Compressor trouble (lock)
Current detect circuit system trouble
— TD1 miswiring
— Low pressure protective operation
— Oil level down detective protection
Judging
Check code name
device
I/F
Indoor
Indoor
Indoor
I/F
I/F
I/F
I/F
I/F
I/F
Indoor
Indoor
I/F
IPDU
I/F
I/F
I/F
I/F
I/F
Indoor
I/F
IPDU
IPDU
IPDU
I/F
I/F
I/F
34-EN