Toshiba MMK-AP0074MH-E Service Manual page 84

SMMS High-Wall Type
Check method
On the 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 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 "Wired remote controller display" in the list.
• In case of check from outdoor unit: See "Outdoor unit 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 a wireless remote controller: See "Sensor block display of receiving
unit" in the list.
ALT: Flashing is alternately when there are two flashing LED.
SIM: Simultaneous flashing when there are two flashing LED.
Check code
Wired Outdoor unit 7- AI-NET
remote segment display central
controller control
Auxiliary code
display display
E01 — — —
E02 — — —
E03 — — 97
E04 — — 04
No. of indoor
units in which
E06 E06 sensor has been 04
normally
received
— E07 — —
Duplicated
E08 E08 indoor unit 96
addresses
33-EN
Installation Manual
: Lighting, : Flashing, : Goes off
AI-NET: Artificial Intelligence
IPDU: Intelligent Power Drive Unit
Wireless remote controller
Sensor block display of
Check code Judging
receiving unit
name device
Operation Timer Ready Flash
Communication
error between
indoor unit and
Remote
remote controller
controller
(Detected at
remote controller
side)
Remote controller Remote
transmission error controller
Communication
error between
indoor unit and
Indoor unit
remote controller
(Detected at
indoor unit side)
Communication
circuit error
between indoor /
Indoor unit
outdoor unit
(Detected at
indoor unit side)
Decrease of No. of
indoor units
Communication
circuit error
between indoor /
outdoor unit
(Detected at
outdoor unit side)
Duplicated indoor Indoor unit •
unit addresses
– 33 –
SMMS High-Wall Type
Wired
remote
controller
display
E09
E10
E12
E15
E16
E18
E19
E20
E21
E22
E23
I/F
E25
I/F
E26
E28
I/F
Check code Wireless remote controller
Outdoor unit 7- AI-NET Sensor block display of
segment display central receiving unit
control
Auxiliary code Operation Timer Ready
display
— — 99
— — CF
01:Indoor /
Outdoor units
communication
E12 42
02:Outdoor /
Outdoor units
communication
E15 — 42
00:Capacity
over
E16 89
01 ~:No. of
connected units
— — 97, 99
00:No header
E19 02:Two or more 96
header units
01:Outdoor unit
of other line
connected
E20 42
02:Indoor unit of
other line
connected
02:No header
unit
E21 00:Multiple 42
number of
header units
E22 — 42
E23 — 15
E25 — 15
No. of outdoor
units which
E26 15
received signal
normally
Detected
E28 outdoor unit d2
number
– 34 –
Installation Manual
Check code Judging
name device
Flash
Duplicated master Remote
remote controllers controller
Communication
error between Indoor unit
indoor unit MC
Automatic address
I/F
start error
No indoor unit
during automatic I/F
addressing
Capacity over /
No. of connected I/F
indoor units
Communication
error between
header and Indoor unit
follower units
Indoor unit
Outdoor header
I/F
units quantity error
Other line
connected during I/F
automatic address
Error in number of
heat storage I/F
master units
Reduction in
number of heat I/F
storage units
Sending error in
communication
between outdoor
units
I/F
Error in number of
heat storage units
(trouble with
reception)
Duplicated
follower outdoor I/F
addresses
Decrease of No. of
connected outdoor I/F
units
Follower outdoor
I/F
unit error
34-EN