Carrier MMY-MAP0724FT9UL Service Manual page 132

List of Check Codes (Outdoor Unit)
(Errors detected by SHRM-i outdoor interface - typical
examples)
If "HELLO" is displayed on the outdoor 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 error.
Check code
Outdoor 7-segment display
or main remote
Sub-code
Number of indoor units
E06
from which 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
E26
from which signal is not
received normally
E28
Detected outdoor unit No.
A3-IPDU
Fan Sub
IPDU MCU
1 2 3
01
02
03
04
05
06
07
E31
08
09
0A
0B
0C
0D
0E
0F
80
Circle ( ): Faulty IPDU
F04 —
F05 —
01: TE1
F06
02: TE2
F07 —
F08 —
Display of receiving unit
Indicator light block
TCC-LINK
central control
Operation Timer Ready
controller
display
E06
(E04)
(E08)
E12
E15
E16
E19
E20
E23
E25
E26
E28
E31
F04
F05
F06
F07
F08
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
* Indicator light display of the receiving unit may be different from
those in the following table. (Wall type 3 series, etc.)
Typical fault site
Flash
Dropping out of indoor unit
Indoor-outdoor communication
circuit error
Duplicated indoor address
Automatic address starting
error
Indoor unit not found during
automatic address setting
Too many indoor units
connected/overloading
Error in number of outdoor
header units
Connection to other
refrigerant line found
during automatic address
setting
Outdoor-outdoor communication
transmission error
Duplicated follower outdoor
address
Dropping out of outdoor unit
Outdoor follower unit error
IPDU communication error
Sub MCU communication error
Outdoor discharge
ALT
temperature sensor (TD1) error
Outdoor discharge
ALT
temperature sensor (TD2) error
Outdoor heat exchanger
ALT
temperature sensor (TE1, TE2)
error
Outdoor liquid temperature
ALT
sensor (TL) error
Outdoor outside air temperature
ALT
sensor (TO) error
– 132 –
: Flashing, : Goes off
Description of error
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 is 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 125% 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 I/F board error
When power supply was turned on within 30 seconds
(before electric discharge of capacitor) after power
supply was reset
Outdoor discharge temperature sensor (TD1) has
been open/short-circuited.
Outdoor discharge temperature sensor (TD2) has
been open/short-circuited.
Outdoor heat exchanger temperature sensors
(TE1, TE2) have been open/short-circuited.
Outdoor liquid temperature sensor (TL) has been
open/short-circuited.
Outdoor outside air temperature sensor (TO) has
been open/short-circuited.