Carrier MMY-MAP0724FT9UL Service Manual page 146

Check code
Main Outdoor 7-segment display
remote
Check Sub-code
controller
code
L02 L02 —
L03 — —
L04 L04 —
L05 — —
No. of priority
indoor units
L06 L06
L07 — —
L08 L08 —
L09 — —
L10 L10 —
L20 — —
L28 L28 —
A3-IPDU Fan
1 2 3
01
O
02
O
03
O O
04
O
05
O O
06
O O
07
O O O
08
L29 L29
09
O
0A
O
0B
O O
0C
O
0D
O O
0E
O O
0F
O O O
Symbol O
signifies site of
IPDU error.
Detected indoor
address
L30 L30
Location
of
Description
detection
Indoor unit Outdoor units
model
disagreement
error
Indoor unit Duplicated
indoor header
unit
I/F Duplicated
outdoor line
address
I/F Duplicated priority
indoor unit
(as displayed on
priority indoor unit)
I/F Duplicated priority
indoor unit
(as displayed on
indoor unit other
than priority
indoor unit)
Indoor Connection of
unit group control
cable to stand-
alone indoor unit
Indoor Indoor group /
unit addresses not
set
Indoor unit Indoor capacity
not set
I/F Outdoor capacity
not set
Indoor unit Duplicated
central control
address
I/F Too many
outdoor units
connected
I/F Error in No. of
IPDUs
IPDU
O
O
O
O
O
O
O
O
Indoor unit External interlock
of indoor unit
Error detection
System status
condition(s)
Stop of In case of different outdoor unit. • Check outdoor unit model.
corresponding
unit
Stop of There is more than one header
corresponding unit in group.
unit
All stop There is duplication in line
address setting for outdoor
units belonging to different
refrigerant piping systems.
All stop More than one indoor unit has
been set up as priority indoor
unit.
All stop More than one indoor unit
have been set up as priority
indoor unit.
Stop of There is at least one stand-
corresponding alone indoor unit to which group
unit control cable is connected.
Stop of Address setting has not been
corresponding performed for indoor units.
unit
Stop of Capacity setting has not been
corresponding performed for indoor unit.
unit
All stop Jumper wire provided on P.C.
board for servicing I/F P.C.
board has not been removed as
required for given model.
All stop There is duplication in central
control address setting.
All stop There are more than 2
outdoor units.
All stop Insufficient number of IPDUs
are detected when power is
turned on.
Stop of • Signal is present at external
corresponding error input terminal (CN80) for
unit 1 minute.
– 146 –
Check items (locations)
• Check indoor addresses.
• Check for any change made
to remote controller
connection (group/individual)
since indoor address setting.
• Check line addresses.
• Check display on priority
indoor unit.
• Check displays on priority
indoor unit and outdoor unit.
• Check indoor addresses.
• Check indoor addresses.
Note:
This code is displayed when
power is turned on for the
first time after installation.
Set indoor capacity. (DN = 11)
Check model setting of P.C.
board for servicing outdoor I/F
P.C. board.
• Check central control
addresses.
• Check No. of outdoor units
connected (Only up to 2 units
per system allowed).
• Check communication lines
between outdoor units.
• Check for defect in outdoor
P.C. board (I/F).
• Check model setting of
P.C. board for servicing
outdoor I/F P.C. board.
• Check connection of UART
communication connector.
• Check A3-IPDU, fan IPDU,
and I/F P.C. board for defect.
When external device is
connected to CN80
connector:
1) Check for defect in external
device.
2) Check for defect in indoor
P.C. board.
When external device is not
connected to CN80
connector:
1) Check for defect in indoor
P.C. board.