45
The 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:
DISPLAY
FAULT
LED
DESCRIPTION CAUSE OF FAULT / REMEDY
Alarm: OC
Over Current
Solid
Red
Over
Current
The current exceeds 45 A
Alarm: OT Blinking
Red
Heat Sink over
Temperature
Heat sink temperature exceeds 90 ºC
Alarm: CPF00
Link Master
Error
Solid
Red
Display Panel
Error
The CPU is not able to exchange data with
the Display Panel
Alarm: CPF04
DC / DC
Low Volt
Solid
Red
Low
Voltage
1. Low battery voltage:
< 9 V for 12 V Battery
< 18 V for 24 V Battery
2. If this symptom is for a 12 V Battery
System, check & ensure that DIP Switch
1 at the back of the unit is selected for
12 V battery and not for 24 V battery.
Alarm: CPF09
Heat Sink SR
Open
Solid
Red
Low Operating
Temperature
Operating temperature is below 0 ºC (32 ºF).
Ensure operating temperature is above 0 ºC
(32 ºF).
Battery
Temperature
Sensor (BTS)
displays
- - - ºC
N/a Battery
Temperature
is below 0 ºC
1. Lower limit of temperature compensation
is 0 ºC.
2. Negative values can’t be displayed.
Table 7.1. Fault Indications & Remedies
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