Troubleshooting - Samlex Solar SCC-30AB Owner's Manual

SCC-30AB is very rugged and designed for the most extreme operating conditions.
Most PV system problems will be caused by connections,Voltage drops, and loads.
Troubleshooting the SCC-30AB controller is simple. Some basic troubleshooting
procedures are listed below.
Protections & Fault Messages on the LCD Display & Fault LED
Table 7.1 gives fault messages displayed on the LCD screen and status of the Red Fault
LED when SCC-30AB stops operating due to protections / system error:
FAULT
DISPLAy
LED
Alarm: OC Solid
Over Current Red
Alarm: OT Blinking
Red
Alarm: CPF00 Solid
Link Master Red
Error
Alarm: CPF04 Solid
DC / DC Red
LowV
Alarm: CPF09 Solid
Heat Sink SR Red
Open
Battery N/A
Temperature
Sensor (BTS)
displays
- - - ºC
DESCRIPTION CAUSE OF FAULT / REMEDy
Over Input current exceeds 45A
Current
Heat Sink over Heat sink temperature exceeds 90ºC
Temperature
Display Panel The CPU is not able to exchange data with
Error the Display Panel
Low
Voltage
Low Operating Operating temperature is below 0ºC (32ºF).
Temperature Ensure operating temperature is above 0ºC
(32ºF).
Battery
Temperature
is below 0ºC
Table 7.1. Fault Indications & Remedies

TroubleshooTing

3. Low Battery Voltage:
< 9V for 12V Battery
< 18V for 24V Battery
4. If this symptom is for a 12V Battery
System, check & ensure that DIP Switch
1 at the back of the unit is selected for
12V battery and not for 24V battery.
1. Lower limit of temperature compensation
is 0ºC.
2. Negative values can't be displayed.
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