12
6
Powering On the System
1. Turn on the AC switch between the SUN2000 and the power grid.
2. Ensure that the DC switches at the SUN2000 bottom are ON.
3. (Optional) Measure the temperatures at the joints between DC terminals and connectors using a
point-test thermometer.
Before turning on the AC switch between the SUN2000 and the power grid, use a multimeter to
check that the AC voltage is within the operating voltage range of the SUN2000.
4. Observe the indicators to check the SUN2000 operating status.
To ensure that the DC terminals are in good contact, check the temperatures at the joints between
DC terminals and connectors after the SUN2000 has been running for a period of time. Ensure
that the temperature rise does not exceed 40
°
C.
At least one PV string is properly
connected, and the DC input voltage of
the corresponding MPPT
higher than or equal to 200 V.
The SUN2000 disconnects from all PV
strings, or the DC input voltage of each
MPPT
circuit is less than 200 V.
The SUN2000 has connected to the
power grid.
The SUN2000 has not connected to the
power grid.
Blinking green (on for 0.5s and then
off for 0.5s)
The SUN2000 receives communications
data normally.
The SUN2000 receives no
communications data for 10s.
Alarm/Maintenance
indicator
Blinking red at long
intervals (on for 1s and
then off for 4s).
A warning alarm is generated.
Blinking red at short
intervals (on for 0.5s
and then off for 0.5s).
A minor alarm is generated.
A major alarm is generated.
Blinking green at long
intervals (on for 1s and
then off for 1s)
Local maintenance is in progress.
Blinking green at short
intervals (on for 0.125s
and then off for 0.125s)
Local maintenance succeeds.
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