Toshiba SUPER MMK-AP0073H (IN) Service Manual page 38

13
TROUBLESHOOTING
A wired remote controller is necessary for this function.
This function cannot be operate with a wireless remote controller.
n Confirmation and check
When a trouble occurred in the air conditioner,
the check code and the indoor unit No. appear
on the display part of the remote controller.
The check code is only displayed during the
operation. If the display disappears, operate the
air conditioner according to the following
"Confirmation of error history" for confirmation.
Check code Indoor unit No. in
which an error occurred.
n Confirmation of error history
When a trouble occurred on the air conditioner,
the trouble history can be confirmed with the
following procedure. (The trouble history is
stored in memory up to 4 troubles.)
The history can be confirmed from both operat-
ing status and stop status.
2
3
1
Procedure
SET TEST
When pushing and buttons at the same time
for 4 seconds or more, the following display ap-
pears.
If [Service check ] is displayed, the mode enters
in the trouble history mode.
• [01 : Order of trouble history] 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.
2
Procedure
Every pushing of "TEMP ." /
set temperature, the trouble history stored in
memory is displayed in order.
The numbers in CODE No. indicate
CODE No. [01] (latest) → [04] (oldest).
REQUIREMENT
CL
Do not push button because all the trouble
history of the indoor unit will be deleted.
3
Procedure
TEST
After confirmation, push button to return to
1
theusual display.
n Check method
On the remote controller (Wired remote controller, Central control remote controller) and the interface P .C. board of
the outdoor unit (I/F), a check display LCD (Remote controller) 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 selfdiagnosis function, a trouble or position with error of the
air conditioner can be found as shown in the table below.
n 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 7-segment display" in the list.
• In case of check from indoor unit with wireless remote controller: See "Sensor block display of receiving unit" in the
list.
Check code
Main
Outdoor 7-segment display
remote
controller
Auxiliary code
display
E01 —
E02 —
E03 —
button used to
E04 —
No. of indoor units in which sensor
E06 E06
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 connected
E20 E20
02: Indoor of other line connected
E23 E23
E25 E25
No. of outdoor units which received
E26 E26
signal normally
E28 E28 Detected outdoor unit number
01: IPDU1 error
02: IPDU2 error
03: IPDU1, 2 error
E31 E31 04: Fan IPDU error
05: IPDU + Fan IPDU error
06: IPDU2 + Fan IPDU error
07: All IPDU error
AI-NET : Artificial Intelligence, IPDU : Intelligent Power Drive Unit
¡ ¤
: Lighting, : Flashing,
ALT : Flashing is alternately when there are two flashing LED.,
SIM : Simultaneous flashing when there are two flashing LED.
Wireless remote controller
Sensor block displa
of receiving unit
Operation Timer PRE, DEF . Flash
l l
¤ Communication error between indoor and remote
—
controller (Detected at remote controller side)
l l
¤
— Remote controller transmission error
l l
¤ Communication error between indoor and remote
—
controller (Detected at indoor side)
l l ¤ Communication circuit error between indoor/outdoor
—
(Detected at indoor side)
l l ¤
Decrease of No. of indoor units
l l ¤ Communication circuit error between indoor/outdoor
—
(Detected at outdoor side)
l l
¤
Duplicated indoor addresses
l l
¤
— Duplicated main remote controllers
l l
¤
— Communication error between indoor MCU
l l
¤
Automatic address start error
l l
¤
— Indoor is nothing during automatic addressing
l l
¤
Capacity over / No. of connected indoor units
¤ l l
— Communication error between indoor units
l l ¤
Outdoor header units quantity error
l l ¤
Other line connected during automatic address
l l
¤
— Sending error in communication between outdoor units
l l
¤
— Duplicated follower outdoor addresses
l l ¤
Decrease of No. of connected outdoor units
l l ¤
Follower outdoor unit error
l l ¤
IPDU communication error
l
: Goes off
Judging
Check code name
device
Remote
controller
Remote
controller
Indoor
Indoor
I/F
I/F
Indoor / I/F
Remote
controller
Indoor
I/F
I/F
I/F
Indoor
I/F
I/F
I/F
I/F
I/F
I/F
I/F