Carrier MMY-MAP1204FT9UL - Check Codes: Outdoor Unit (Interface)

– 132 –
IPDU: Intelligent Power Drive Unit (Inverter P.C. board)
: Lighting, : Flashing, : Goes off
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.)
Check code Display of receiving unit
Typical fault site Description of error
Outdoor 7-segment display TCC-LINK
central control
or main remote
controller
display
Indicator light block
Sub-code Flash
Ready Timer Operation
Indoor-outdoor communication
circuit error
E06 Dropping out of indoor unit E06
Indoor unit initially communicating normally fails to
return signal (reduction in number of indoor units
connected).
Number of indoor units
from which signal is
received normally
(E04)—E07
Signal cannot be transmitted to indoor units
(
→
indoor units left without communication from
outdoor unit).
Too many indoor units
connected/overloading
E16E16
Combined capacity of indoor units is too large
(more than 125% of combined capacity of outdoor
units).
00: Overloading
01: Number of units
connected
E26E26 Dropping out of outdoor unit
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).
Address of outdoor unit
from which signal is not
received normally
Error in number of outdoor
header units
There is no or more than one outdoor header unit
in one refrigerant line.
E19E19
00: No header unit
02: Two or more header
units
01: TE1
02: TE2
Outdoor heat exchanger temperature sensors
(TE1, TE2) have been open/short-circuited.
F06 ALTF06
Outdoor heat exchanger
temperature sensor (TE1, TE2)
error
E28 Outdoor follower unit errorDetected outdoor unit No. E28
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
E31
IPDU communication error
Sub MCU communication error
E31
E20E20
01: Connection of outdoor
unit from other
refrigerant line
02: Connection of indoor
unit from other
refrigerant line
Connection to other
refrigerant line found
during automatic address
setting
Indoor unit from other refrigerant line is detected
while indoor automatic address setting is in progress.
More than one indoor unit is assigned same
address (also detected at indoor unit end).
(E08)E08
Duplicated indoor addressDuplicated indoor address
Indoor unit fails to communicate while automatic
address setting for indoor units is in progress.
Indoor unit not found during
automatic address setting
E15—E15
Outdoor discharge temperature sensor (TD1) has
been open/short-circuited.
Outdoor discharge
temperature sensor (TD1) error
F04 ALT—F04
Outdoor discharge temperature sensor (TD2) has
been open/short-circuited.
Outdoor discharge
temperature sensor (TD2) error
F05 ALT—F05
Outdoor liquid temperature sensor (TL) has been
open/short-circuited.
Outdoor liquid temperature
sensor (TL) error
F07 ALT—F07
Outdoor outside air temperature sensor (TO) has
been open/short-circuited.
Outdoor outside air temperature
sensor (TO) error
F08 ALT—F08
Outdoor-outdoor communication
transmission error
E23 Signal cannot be transmitted to other outdoor units. —E23
Duplicated follower outdoor
address
There is duplication in outdoor addresses set
manually.
E25—E25
• 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.
E12E12
Automatic address starting
error
01: Indoor-outdoor
communication
02: Outdoor-outdoor
communication
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
0E
0F
80
A3-IPDU
Circle (
): Faulty IPDU
Fan
IPDU
Sub
MCU
123
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.