Toshiba Carrier MMU-AP0182H2UL Service Manual page 78

List of Check Codes (Outdoor Unit)
(Errors detected by SMMS-i outdoor interface - typical examples)
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
E28 Detected outdoor unit No.
A3-IPDU Fan A3-IPDU
IPDU
1 2 3 1 2 3
O O
01 0A
O O O
02 0B
O O O
03 0C
O O O
E31 04 0D
O O O O
05 0E
O O O O O
06 0F
O O O
07 Circle (O):
O Faulty IPDU
08
O O
09
F04 –
F05 –
01: TE1
F06
02: TE2
F07 –
F08 –
F11 –
Display of receiving unit
TCC-LINK Indicator light block
central control
or main remote
Operation Timer Ready
controller
display
E06
(E04)
(E08)
E12
E15
E16
E19
E20
E23
E25
E26
E28
Fan
IPDU
O
O
O
O
E31
O
O
F04
F05
F06
F07
F08
F11
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 fault site
Flash
Indoor unit initially communicating normally fails to
Dropping out of indoor unit return signal (reduction in number of indoor units
connected).
Indoor-outdoor Signal cannot be transmitted to indoor units
communication circuit (
error outdoor unit).
More than one indoor unit is assigned same
Duplicated indoor address
address (also detected at indoor unit end).
• Indoor automatic address setting is started while
Automatic address starting
error • Outdoor automatic address setting is started
Indoor unit not found
Indoor unit fails to communicate while automatic
during automatic address
address setting for indoor units is in progress.
setting
Combined capacity of indoor units is too large
Too many indoor units
(more than 135% of combined capacity of outdoor
connected/overloading
units).
Error in number of outdoor There is no or more than one outdoor header unit
header units in one refrigerant line.
Connection to other
Indoor unit from other refrigerant line is detected
refrigerant line found
while indoor automatic address setting is in
during automatic address
progress.
setting
Outdoor-outdoor
Signal cannot be transmitted to other outdoor
communication
units.
transmission error
Duplicated follower There is duplication in outdoor addresses set
outdoor address manually.
Follower outdoor unit initially communicating
Dropping out of outdoor
normally fails to do so (reduction in number of
unit
follower outdoor units connected).
Outdoor header unit detects fault relating to
Outdoor follower unit error follower outdoor unit (detail displayed on follower
outdoor unit).
There is no communication between IPDUs (P.C.
IPDU communication error
boards) in inverter box.
Outdoor discharge
Outdoor discharge temperature sensor (TD1) has
ALT temperature sensor (TD1)
been open/short-circuited.
error
Outdoor discharge
Outdoor discharge temperature sensor (TD2) has
ALT temperature sensor (TD2)
been open/short-circuited.
error
Outdoor heat exchanger
Outdoor heat exchanger temperature sensors
ALT temperature sensor (TE1,
(TE1, TE2) have been open/short-circuited.
TE2) error
Outdoor liquid temperature Outdoor liquid temperature sensor (TL) has been
ALT
sensor (TL) error open/short-circuited.
Outdoor outside air
Outdoor outside air temperature sensor (TO) has
ALT temperature sensor (TO)
been open/short-circuited.
error
78
: Flashing, : Goes off
Description of error
indoor units left without communication from
automatic address setting for equipment in other
refrigerant line is in progress.
while automatic address setting for indoor units
is in progress.