Troubleshooting - Toshiba Carrier MMD-AP0304H2UL Manuel D'installation

11

Troubleshooting

Confirmation and check
When an error occurred in the air conditioner, the
check code and the indoor UNIT No. appear on the
display part of the remote control.
The check 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.
Check code Indoor UNIT No. in
which an error occurred
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
1
Push and buttons simultaneously for
4 seconds or more, the following display
appears.
If [Service check] is displayed, the mode
enters in the error log mode.
• [01: Order of error log] is displayed in CODE No.
window.
• [Check code] is displayed in CHECK window.
• [Indoor unit address in which an error occurred]
is displayed in Unit No.
27-EN
2
Push button. 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
Push button to return to the usual display
after confirmation.
1. Check the errors according to the above procedure.
2. Ask an authorized dealer or qualified service
(maintenance) professional to repair or maintain the
air conditioner.
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 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.
• 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 Wireless remote control
Sensor block display of
Outdoor 7-segment display
Wired remote
control display
Auxiliary code Operation Timer Ready Flash
E01 — —
E02 — —
E03 — —
E04 — —
No. of indoor units in which
E06 E06 sensor has been normally
received
— E07 —
E08 E08 Duplicated indoor addresses
E09 — —
E10 — —
01: Indoor / Outdoor
communication
E12 E12
02: Communication between
outdoor units
E15 E15 —
00: Capacity over
E16 E16
01 ~:No. of connected units
E18 — —
00: Header is nothing
E19 E19
02: Two or more header units
01: Outdoor of other line
E20 E20 connected
02: Indoor of other line connected
E23 E23 —
E25 E25 —
E26 No. of outdoor units which
E26
received signal normally
E28 E28 Detected outdoor unit number
– 14 –
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.
Check code name
receiving unit
Communication error between indoor and remote
control
(Detected at remote control side)
Remote control transmission error
Communication error between indoor and remote
control (Detected at indoor side)
Communication circuit error between indoor /
outdoor (Detected at indoor side)
Decrease of No. of indoor units
Communication circuit error between indoor /
outdoor (Detected at outdoor side)
Duplicated indoor addresses
Duplicated header remote controls
Communication error between indoor MCU
Automatic address start error
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.
Communication error between indoor units
Outdoor header units quantity error
Other line connected during automatic address
Sending error in communication between outdoor
units
Duplicated follower outdoor addresses
Decrease of No. of connected outdoor units
Follower outdoor unit error
Judging device
Remote control
Remote control
Indoor
Indoor
I/F
I/F
Indoor / I/F
Remote control
Indoor
I/F
I/F
I/F
Indoor
I/F
I/F
I/F
I/F
I/F
I/F EN
28-EN