Troubleshooting Guide - Carrier CDII-184R1-0CTR4 Installation & Operation Manual

10. TROUBLESHOOTING

10.1 Troubleshooting Guide

7 HP, 11 HP & 14 HP
Unit
Fault on
Outdoor
(CDU)
Temperatur
e sensor
Short/Open
HP Fault
LP fault
Description
corded
remote
Inlet
Midlet
Outlet
Ambient
Discharge
(DLT)
Display
On
On On
CDU PC
b4 b4 B4
b5 b5 B5
b6 b6 B6
b7 b7 B7
b8 b8 B8
b0 b0 HP
b1 b1 LP
54
Troubleshooting Steps
Check Wiring connection plus
connector of sensor on PCB.
Check Resistance value of sensor
with multimeter.
Check wire insulation ,it should be
in proper condition.
Check Wiring connection plus
connector of sensor on PCB.
Check Resistance value of sensor
with multimeter.
Check wire insulation ,it should be
in proper condition.
Check Wiring connection plus
connector of sensor on PCB.
Check Resistance value of sensor
with multimeter.
Check wire insulation ,it should be
in proper condition.
Check Wiring connection plus
connector of sensor on PCB.
Check Resistance value of sensor
with multimeter.
Check wire insulation ,it should be
in proper condition.
Check Wiring connection plus
connector of sensor on PCB.
Check Resistance value of sensor
with multimeter.
Check wire insulation ,it should be
in proper condition.
Check the condition of LP/HP
Switch.
Check continuity of wires with
connection on PCB using
Multimeter.
Check proper pressure condition
using Pressure gauges.
Check the condition of LP/HP
Switch.
Check continuity of wires with
connection on PCB using
Multimeter.
Check proper pressure condition
using Pressure gauges.