Carrier CDII-184R1-0CTR4 Installation & Operation Manual page 56

Power Supply Open at
FCU PCB
Corded Remote
open/short/ reverse
connection
Communication wire
Open/short/ reverse
connection at FCU PCB
Unit
Fault at Drive
Hardware
DC bus under voltage (UL)
Compressor connected loss
Communication time out error
Power module over temperature
Emergency switch active
Abnormal condition
Internal memory error
DC bus under voltage (OU)
bd
Table - 4
Description
Fin Overheat
Overcurrent at
deceleration state
Overcurrent at steady state
Software
trip
Overload trip (OL)
Compressor overheat
Overcurrent at acceleration
state
Overcurrent at acceleration
state
Overcurrent at deceleration
trip
state
Overcurrent at steady state
Table - 5
56
Check voltage on power connector
"P2" as well as voltage on mains
using multimeter on AC mode.
Check harness using. Multimeter on
continuity mode.
Check the wiring of remote with
Multimeter on continuity mode with
PCB.
Check connector soldering on PCB.
If still problem persists Check color
code of wire with marking mentioned
on PCB in reverse condition.
Check connection on all PCB. Check
CE BD
connector on PCBs.
On
corded
remote
01
0d
0C
0b
07
0A
02
04
03
05
0E
0F
10
1E
28
80-82
06
On CDU On PC
01 01
0d 0d
0C 0C
0b 0b
07 07
0A 0A
02 02
04 04
03 03
05 05
0E 0E
0F 0F
10 10
1E 1E
28 28
80-82 80-82
06 06