Carrier CDII-184R1-0CTR4 - Troubleshooting Guide

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10. TROUBLESHOOTING
10.1 Troubleshooting Guide
7 HP, 11 HP & 14 HP
Unit
Description
Display
Troubleshooting Steps
On
corded
remote
On
CDU
On
PC
Fault on
Outdoor
(CDU)
Temperatur
e sensor
Short/Open
Inlet
b4
b4
B4
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.
Midlet
b5
b5
B5
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.
Outlet
b6
b6
B6
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.
Ambient
b7
b7
B7
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.
Discharge
(DLT)
b8
b8
B8
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.
HP Fault
b0
b0
HP
Check the condition of LP/HP
Switch.
Check continuity of wires with
connection on PCB using
Multimeter.
Check proper pressure condition
using Pressure gauges.
LP fault
b1
b1
LP
Check the condition of LP/HP
Switch.
Check continuity of wires with
connection on PCB using
Multimeter.
Check proper pressure condition
using Pressure gauges.