Toshiba MMU-AP0071MH Manuel D'installation page 27

Check method
On the remote controller (Main remote controller, Central control remote controller) and the interface P.C. board of
the outdoor unit, a check display LCD (Remote controller) or 7-segment display (on the outdoor interface P.C.
board) operation is provided. Therefore the operation status can be known. Using this self-diagnosis function, a fault
and the location of this fault within the air conditioning system can be located, 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 a fault from the indoor remote controller: See "Main remote controller display" in the list.
• In case of a fault from the outdoor unit: See "Outdoor 7-segment display" in the list.
• In case of a fault from the indoor unit with a wireless remote controller:
See "Sensor block display of receiving unit" in the list.
Check code
Main
Outdoor 7-segment display
remote
controller
display
Auxiliary code
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 —
E26 No. of outdoor units which
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.
Terminology
IPDU : Intelligent Power Drive Unit
¡
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
AI-NET central
of receiving unit
control display
Timer Ready Flash
Operation
¤ l
—
¤ l
—
¤ l
97
l l
04
l l
04
l l
—
¤ l
96
l
¤
99
¤ l
CF
¤ l
42
l l
42
l l
89
¤ l
97, 99
l l
96
l l
42
l l
15
l l
15
l l
15
l l
d2
l l
CF
¤
: Lighting, : Flashing,
Check code name
l
Communication error between indoor and remote
controller (Detected at remote controller side)
l
Remote controller transmission error
l
Communication error between indoor and remote
controller (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)
l
Duplicated indoor addresses
l
Duplicated main remote controllers
l
Communication error between indoor MCU
l
Automatic address start error
¤
Indoor is nothing during automatic addressing
¤
Capacity over / No. of connected indoor units
l
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
¤
IPDU communication error
24
l
: Goes off
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