Troubleshooting - Toshiba MMD-AP0481HFE Installation Manual

14

Troubleshooting

Confirmation and check
When an error occurred in the air conditioner, an error code and indoor UNIT No. appear on the display part of the
remote controller.
The error code is only displayed during the operation.
If the display disappears, operate the air conditioner according to the following "Confirmation of error log" for
confirmation.
Error code
Confirmation of error log
When an error occurred on the air conditioner, the error log can be confirmed with the following procedure. (The
error log is stored in memory up to 4 errors.)
The log can be confirmed from both operating status and stop status.
2
3
1
When and buttons are pushed simultaneously for 4 seconds or more, the following display
appears.
If is displayed, the mode enters in the error log mode.
• [01: Order of error log] is displayed in CODE No.
• [Error code] is displayed in CHECK.
• [Indoor unit address in which an error occurred] is displayed in Unit No.
2
Every pushing of button used to set temperature, the error log stored in memory is
displayed in order.
The numbers in CODE No. indicate CODE No. [01] (latest) → [04] (oldest).
REQUIREMENT
Do not push button because all the error log of the indoor unit will be deleted.
3
After confirmation, push button to return to the usual display.
37-EN
Indoor UNIT No. in
which an error occurred
1
– 19 –
Check method
On the wired remote controller, central control remote controller and the interface P.C. board of the outdoor unit (I/
F), or 7-segment display (on the outdoor interface P.C. board) to display the operation is provided. Therefore the
operation status can be known. Using this self-diagnosis function, a trouble or position with error 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.
• In case of check from indoor remote controller: See "Wired remote controller display" in the list.
• In case of check from outdoor unit: See "Outdoor unit 7-segment display" in the list.
Check code
Wired Outdoor unit 7-segment display
remote
controller
Auxiliary code
display
E01 — —
E02 — —
E03 — —
E04 — —
No. of indoor units in which sensor
E06 E06
has been normally received
— E07 —
E08 E08 Duplicated indoor unit addresses
E09 — —
E10 — —
01:Indoor / Outdoor units
communication
E12 E12
02:Outdoor / Outdoor units
communication
E15 E15 —
00:Capacity over
E16 E16
01 ~:No. of connected units
E18 — —
00:No header
E19 E19
02:Two or more header units
01:Outdoor unit of other line
connected
E20 E20
02:Indoor unit of other line
connected
: Lighting, : Flashing,
IPDU: Intelligent Power Drive Unit
ALT: Flashing is alternately when there are two flashing LED.
SIM: Simultaneous flashing when there are two flashing LED.
Check code name Judging device
Communication error between
indoor unit and remote controller
Remote controller
(Detected at remote controller
side)
Remote controller transmission
Remote controller
error
Communication error between
indoor unit and remote controller Indoor unit
(Detected at indoor unit side)
Communication circuit error
between indoor / outdoor unit Indoor unit
(Detected at indoor unit side)
Decrease of No. of indoor units I/F
Communication circuit error
between indoor / outdoor unit I/F
(Detected at outdoor unit side)
Duplicated indoor unit addresses Indoor unit • I/F
Duplicated master remote
Remote controller
controllers
Communication error between
Indoor unit
indoor unit MC
Automatic address start error I/F
No indoor unit during automatic
I/F
addressing
Capacity over / No. of connected
I/F
indoor units
Communication error between
header and follower units Indoor Indoor unit
unit
Outdoor header units quantity
I/F
error
Other line connected during
I/F
automatic address
: Goes off
38-EN