Carrier MMY-MAP1204FT9UL - Check Codes: Outdoor Unit (IPDU and Communication Errors)

– 141 –
Check code
Location
of
detection
System statusDescription
Error detection
condition(s)
Check items (locations)
Outdoor 7-segment display Main
remote
controller
Check
code
Sub-code
I/FDetected
outdoor unit
No.
E28E28
All stop Outdoor header unit receives
error code from outdoor
follower unit.
• Check check code displayed
on outdoor follower unit.
<Convenient functions>
If SW04 is pushed and held for
at least 1 second while [E28] is
displayed on the 7-segment
display of outdoor header unit,
the fan of the outdoor unit that
has been shut down due to an
error comes on.
If SW04 and SW05 are pushd
simultaneously, the fans of
normal outdoor units come on.
To stop the fan or fans, push
SW05 on its own.
Outdoor
follower unit
error
Indoor unit
——F01
Stop of
corresponding
unit
Sensor resistance is infinity or
zero (open/short circuit).
• Check connection of TCJ
sensor connector and wiring.
• Check resistance
characteristics of TCJ sensor.
• Check for defect in indoor
P.C. board.
Indoor TCJ
sensor error
Indoor unit
——F02
Stop of
corresponding
unit
Sensor resistance is infinity
or zero (open/short circuit).
• Check connection of TC2
sensor connector and wiring.
• Check resistance
characteristics of TC2 sensor.
• Check for defect in indoor
P.C. board.
Indoor TC2
sensor error
Indoor unit
——F03
Stop of
corresponding
unit
Sensor resistance is infinity
or zero (open/short circuit).
• Check connection of TC1
sensor connector and wiring.
• Check resistance
characteristics of TC1 sensor.
• Check for defect in indoor
P.C. board.
Indoor TC1
sensor error
I/F
F04 —F04
All stop Sensor resistance is infinity
or zero (open/short circuit).
• Check connection of TD1
sensor connector.
• Check resistance
characteristics of TD1 sensor.
• Check for defect in outdoor
P.C. board (I/F).
TD1 sensor error
I/F
F05 —F05
All stop Sensor resistance is infinity
or zero (open/short circuit).
• Check connection of TD2
sensor connector.
• Check resistance
characteristics of TD2 sensor.
• Check for defect in outdoor
P.C. board (I/F).
TD2 sensor error
I/F01:
TE1 sensor error
02:
TE2 sensor error
F06F06
All stop Sensor resistance is infinity
or zero (open/short circuit).
• Check connection of TE1/
TE2 sensor connectors.
• Check resistance
characteristics of TE1/TE2
sensors.
• Check for defect in outdoor
P.C. board (I/F).
TE1/TE2 sensor
error
I/F
F07 —F07
All stop Sensor resistance is infinity
or zero (open/short circuit).
• Check connection of TL
sensor connector.
• Check resistance
characteristics of TL sensor.
• Check for defect in outdoor
P.C. board (I/F).
TL sensor error
I/F
Symbol
O
signifies site of
IPDU error.
E31E31
All stop Communication is disrupted
between IPDUs (P.C. boards)
in inverter box.
• Check wiring and connectors
involved in communication
between IPDU-I/F P.C. board
for bad contact or broken wire.
• Check for defect in outdoor
P.C. board (I/F, A3-IPDU or
Fan IPDU).
• Check for external noise.
IPDU
communication
error
Sub MCU
communication
error
80 All stop Communication between MCU
and Sub MCU stopped.
• Operation of power supply
reset (OFF for 60 seconds
or more)
• Outdoor I/F PC board error
check
Communication
error between MCU
and Sub MCU
1
O
O
O
O
O
O
O
O
2
O
O
O
O
O
O
O
O
3
O
O
O
O
O
O
O
O
A3-IPDU Fan
IPDU
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
0E
0F
80
O
O
O
O
O
O
O
O
Sub
MCU
O