Toshiba MMD-AP0726HP-UL Service Manual page 51

List of Check Codes (Outdoor Unit)
(Check code detected by SMMS-e outdoor interface - typical examples)
If "HELLO" is displayed on the oudoor 7-segment for 1 minute or
more, turn off the power supply once and then turn on the power
supply again after passage of 30 seconds or more. When the
same symptom appears, it is considered there is a possibility of
I/F board trouble.
Check code
Outdoor 7-segment display
Sub-code
Number of indoor units from which
E06
signal is received normally
E07 –
E08 Duplicated indoor address
01: Indoor-outdoor communication
E12 02: Outdoor-outdoor
communication
E15 –
00: Overloading
E16
01: Number of units connected
00: No header unit
E19
02: Two or more header units
01: Connection of outdoor unit from
other refrigerant line
E20
02: Connection of indoor unit from
other refrigerant line
E23 –
E25 –
Address of outdoor unit from which
E26
signal is not received normally
E 2 8 D e e t c e t d o u d t o r o u n t i N . o
A3-IPDU Fan-IPDU A3-IPDU
1 2 1 2 1
01 ○ 10
02 ○ 11 ○
03 ○ ○ 12
08 ○ 13 ○
09 ○ ○ 18
E 3 1
0A ○ ○ 19 ○
0B ○ ○ ○ 1A
1B ○
Circle (O): IPDU
trouble 80 : Communication trouble between
MCU and Sub MCU
F 0 4 –
F05 –
01: TE1
F06
02: TE2
01: TL1
F 0 7 –
02: TL2
03: TL3
F 0 8 –
01: TG1
F09
02: TG2
Display of receiving unit
TCC-LINK Indicator light block
central control
or main remote
Operation Timer Ready
control
display
E 0 6
(E04)
(E08)
E12
E15
E16
E19
E20
E23
E25
E26
E 2 8
Fan-IPDU
2 1 2
○
○
○ ○
○ ○
○ ○
E 3 1
○ ○
○ ○ ○
○ ○ ○
F 0 4
F05
F 0 6
F 0 7
F 0 8
IPDU: Intelligent Power Drive Unit (Inverter P.C. board)
: Lighting,
ALT.: Flashing is alternately when there are two flashing LED
SIM: Simultaneous flashing when there are two flashing LED
Typical problem site
Flash
Signal lack of indoor unit
Indoor-outdoor
communication circuit
trouble
Duplicated indoor address
Automatic address starting
trouble
Indoor unit not found
during automatic address
setting
Too many indoor units
connected/overloading
Trouble in number of
outdoor header units
Connection to other
refrigerant line found
during automatic address
setting
Outdoor-outdoor
communication
transmission trouble
Duplicated follower
outdoor address
Signal lack of outdoor unit
Outdoor follower unit
trouble
IPDU communication
trouble Sub MCU
communication trouble
Outdoor discharge
temperature sensor (TD1)
A L T
trouble
Outdoor discharge
ALT temperature sensor (TD2)
trouble
Outdoor heat exchanger
liquid side temperature
A L T
sensor (TE1, TE2) trouble
Outdoor liquid temperature
A L T
sensor (TL1,TL2,TL3)
trouble
Outdoor outside air
A L T temperature sensor (TO)
trouble
Outdoor heat exchanger
gas side temperature
sensor (TG1, TG2) trouble
- 51 -
: Flashing, : Goes off
Description of problem
Indoor unit initially communicating normally fails to
return signal (reduction in number of indoor units
connected).
Signal cannot be transmitted to indoor units
( indoor units left without communication from
outdoor unit).
More than one indoor unit are assigned same
address (also detected at indoor unit end).
• Indoor automatic address setting is started while
automatic address setting for equipment in other
refrigerant line is in progress.
• Outdoor automatic address setting is started
while automatic address setting for indoor units
is in progress.
Indoor unit fails to communicate while automatic
address setting for indoor units is in progress.
Combined capacity of indoor units is too large
(more than 135% of combined capacity of outdoor
units).
There is no or more than one outdoor header unit
in one refrigerant line.
Indoor unit from other refrigerant line is detected
while indoor automatic address setting is in
progress.
Signal cannot be transmitted to other outdoor
units.
There is duplication in outdoor addresses set
manually.
Follower outdoor unit initially communicating
normally fails to do so (reduction in number of
follower outdoor units connected).
Outdoor header unit detects fault relating to
follower outdoor unit (detail displayed on follower
outdoor unit).
There is no communication between IPDUs (P.C.
boards) in inverter box.
Outdoor discharge temperature sensor (TD1) has
been open/short-circuited.
Outdoor discharge temperature sensor (TD2) has
been open/short-circuited.
Outdoor heat exchanger liquid side temperature
sensors (TE1, TE2) have been open/short-
circuited.
Outdoor liquid temperature sensor (TL1,TL2,TL3)
has been open/short-circuited.
Outdoor outside air temperature sensor (TO) has
been open/short-circuited.
Outdoor heat exchanger gas side temperature
sensors (TG1, TG2) have been open/short-
circuited.