Troubleshooting - Toshiba Carrier MMD-AP0074BH2UL-1 Manuel D'installation

10

Troubleshooting

 Confirmation and check
When a problem 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 check code
log" for confirmation.
Check code Indoor UNIT No. in which a
problem occurred
 Confirmation of check code
log
When a problem occurred on the air conditioner, the
check code log can be confirmed with the following
procedure. (The check code log is stored in memory up
to 4 check code.)
The log can be confirmed from both operating status
and stop status.
2
3
1
1
Procedure
Push and buttons simultaneously for 4 seconds
or more, the following display appears.
If [Service check] is displayed, the mode enters in
the check code log mode.
• [01: Order of check code log] is displayed in CODE
No. window.
• [Check code] is displayed in CHECK window.
• [Indoor unit address in which a problem occurred] is
displayed in Unit No.
37-EN
2
Procedure
Push button. The check code 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 check code log of
the indoor unit will be deleted.
3
Procedure
Push button to return to the usual display after
confirmation.
1. Check the check code according to the above
procedure.
2. Ask an authorized dealer or qualified service
(maintenance) professional to repair or maintain the
air conditioner.
– 19 –
 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 —
No. of indoor units in which sensor has been normally
E06 E06
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 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
sandium.com
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
— 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
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
38-EN