Carrier 38MFC, Service Manual

Page: 39 / 40

39
A7 -- Fuse Chart
Unit Size
Fuse Rating
Indoor unit Outdoor unit Outdoor unit
9K (115V) 3.15A / 250V 30A / 250V ---
12K (115V) 3.15A / 250V 30A / 250V ---
12K (230V) 3.15A / 250V 20A / 250V ---
17K HP / 18K AC (230V) 3.15A / 250V 20A / 250V ---
22K (230V) 3.15A / 250V 30A / 250V 5A / 250V
A8 -- Indoor Unit Diagnostic Guides
Operation
lamp
Timer
Lamp
Display LED STATUS
Diagnostic
Chart
Number
l
1 time
X E
0
Indoor unit EEPROM parameter error 1
l
2 times
X E1 Indoor / outdoor units communication error 2
l
3 times
X E2 Zero-crossing signal detection error 3
l
4 times
X E3 Indoor fan speed has been out of control 4
l
5 times
X E4 Indoor room temperature sensor T1 open circuit or short circuited
{
l
6 times
X E5 Evaporator coil temperature sensor T2 open circuit or short circuited 5
l
2 times
On F1 Outdoor temperature sensor T4 open circuit or short circuited
{
l
3 times
On F2 Condenser coil temperature sensor T3 open circuit or short circuited
{
l
4 times
On F3 Compressor discharge temperature sensor T5 open circuit or short circuited
{
l
5 times
On F4 Outdoor unit EEPROM parameter error 1
l
1 times
l
P0 IPM malfunction or IGBT over-strong current protection 6
l
2 times
l
P1 Over voltage or over low voltage protection 7
l
3 times
l
P2
High temperature protection of compressor top diagnosis and solution
(only for 22K models)
8
l
5 times
l
P4 Inverter compressor drive error 9
l
= Flashing
X = Off
{
Refer to
Additional Information for Critical Parts
on page 30 and Appendices A5 and A6 .
SELECTED TEMPERATURE /
SELF-DIAGNOSTIC CODES indicator
DEFROST indicator
Illuminates when the coil is warming up to prevent
cold blow or when the unit goes into defrost mode.
OPERATION indicator
This indicator flashes once per second after power is
on and illuminates when the unit is in operation.
TIMER indicator
Illuminates during TIMER operation
A14356
Fig. 19 – LED Display
A9 -- Outdoor Unit Diagnostic Guides
Green Lamp
Red
Lamp
Failure Mode
Diagnostic
Chart
Number
On X Standby, normal N/A
X On Operation, normal N/A
On On High/Low voltage protection on compressor terminal 9
On
☆
EEPROM error 1
X
☆
Compressor’s speed is out of control 9
☆
On Zero---crossing signal detection error; lack of phase; synchronization error 3
☆
X IGBT or Module protection 6
☆ ☆
Communication error 2
l
= Flashing
X = Off