Toshiba MMD-AP0071SH-C Service Manual page 47

11
TROUBLESHOOTING
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.
Confirmation of error history
When a trouble occurred on the air conditioner, the
error history can be confirmed with the following
procedure.
(The error history is stored in memory up to 4 errors.)
This history can be confirmed from either operating
status or stop status.
Procedure
TEST
SET
When pushing and buttons simultaneously for 4 seconds or
more, the right display appears.
If [Service Check] is displayed, the mode enters in the error history
mode.
1
• [01: Order of error 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.
Every pushing , buttons, the error history stored in the memory is displayed in order.
The numbers in CODE No. indicates CODE No. [01] (Latest) → [04] (Oldest).
2
CAUTION
CL
Do not push button because all the error history of the indoor unit will be deleted.
3
TEST
After confirmation, push button to return to the usual display.
CODE No.
UNIT No.
R.C. No.
Check code Indoor unit No. in which
an error occurred
TEMP. ON / OFF
2
TIMER SET FAN MODE
TIME SWING/FIX VENT
FILTER
RESET TEST SET CL UNIT
3
Description
CODE No.
UNIT No.
R.C. No.
Check method
On the remote controller (Main 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 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 "Main 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 AI-NET central control remote controller: See "AI-NET central control 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.
Terminology
Check code
Main
Outdoor 7-segment display
remote
controller
display
Auxiliary code
1
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
connected
E20 E20
02: Indoor of other line
connected
E23 E23 —
E25 E25 —
No. of outdoor units which
E26 E26
received 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
¡ l
¤
: 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 controller
Sensor block display
Check code name
AI-NET central
of receiving unit
control display
Operation Timer Ready Flash
Communication error between indoor and
l l
¤
— remote controller
(Detected at remote controller side)
l l
¤
— Remote controller transmission error
l l
¤ Communication error between indoor and
97
remote controller (Detected at indoor side)
l l Communication circuit error between indoor/
¤
04
outdoor (Detected at indoor side)
l l
¤
04 Decrease of No. of indoor units
l l Communication circuit error between indoor/
¤
—
outdoor (Detected at outdoor side)
l l
¤
96 Duplicated indoor addresses
l l
¤
99 Duplicated main remote controllers
l l
¤
CF Communication error between indoor MCU
l l
¤
42 Automatic address start error
l l
¤
42 Indoor is nothing during automatic addressing
l l
¤
89 Capacity over / No. of connected indoor units
l l
¤
97, 99 Communication error between indoor units
l l
¤
96 Outdoor header units quantity error
l l
¤ Other line connected during automatic
42
address
l l
Sending error in communication between
¤
15
outdoor units
l l
¤
15 Duplicated follower outdoor addresses
l l
¤
15 Decrease of No. of connected outdoor units
l l
¤
d2 Follower outdoor unit error
l l
¤
CF IPDU communication error
Judging 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