37
5
ConstruCtion, layout & Controls
Fault Messages
The LCD displays might have the following fault messages when SCC-30AB stops operating.
DISPLAY DESCRIPTION CAUSE OF FAULT
Alarm: OC
Over Current
Over Current The current exceeds 15% of the rated current
Alarm: OT Heat Sink over
temperature
Heat sink temperature exceeds 90°C.
Alarm: CPF00
Link Master error
Display Panel
error
The CPU is not able to exchange data with the
Display Panel.
Alarm: CPF04
DC / DC
Low Volt
Low Battery voltage
< 9V for 12V Battery
< 18V for 24V Battery
1. Batteries are discharged below the minimum
acceptable level, or
2. DIP Switch 1 is set for 24V battery but the battery is 12V.
Alarm: CPF09
Heat Sink SR Open
Low operating
temperature
Operating temperature of the unit is below the
specied limit of 0°C or 32°F.
Battery Temperature
Sensor (BTS) displays:
- - - 0°C
Battery temperature
is below 0°C
1. Lower limit of temperature compensation is 0°C.
2. Negative values can not be displayed.
NOTE: See Table 7.1 under Chapter 7 – Troubleshooting for remedies
Table 5.1. Fault Messages.
Back of the Unit
The back of the unit (Fig 5.2) has the following input / output connections and DIP
Switches for various settings.
NAME DESCRIPTION
PV+
Connecting terminal for Solar Array Positive
PV–
Connecting terminal for Solar Array Negative
Battery +
Connecting terminal for Battery cable Positive
Battery –
Connecting terminal for Battery cable Negative
DIP Switch 1
ON* Selection of battery voltage for 12V system
OFF Selection of battery voltage for 24V system
DIP Switch 2,3, 4
Battery charge control mode: Battery charging algorithm
DIP Switch 5
ON Selection of Auto Equalization
OFF* Selection of Manual Equalization
BTS
Battery Temperature Sensor for temperature compensation
*NOTE: Factory preset condition
Table 5.2. Control Terminal Connection (At the back of the unit).
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