Powering On The System - Huawei SUN2000-33KTL-US Quick Manual

7

Powering On the System

NOTICE
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.
1. Turn on the AC switch between the SUN2000 and the power grid.
2. Ensure that the DC switches at the chassis bottom are ON.
3. (Optional) Measure the temperatures at the joints between DC terminals and connectors using a
point-test thermometer.
NOTE
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 (104 ° F).
4. Observe the indicators to check the SUN2000 operating status.
Indicator Status
PV connection
indicator Steady green
Off
Grid-tied
Steady green
indicator
Off
Communications Blinking green (on for 0.5s and
indicator then off for 0.5s)
Off
Alarm/
Maintenance
indicator
Alarm status
Local
maintenance
status
Description
At least one PV string is properly connected,
and the DC input voltage of the corresponding
MPPT circuit is 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 does not connect to the
power grid.
The SUN2000 receives data over RS485/PLC
communication.
The SUN2000 has not received data over
RS485/PLC communication for 10 seconds.
Blinking red at long
intervals (on for 1s A warning alarm is generated.
and then off for 4s)
Blinking red at
short intervals (on
A minor alarm is generated.
for 0.5s and then
off for 0.5s)
Steady red A major alarm is generated.
Blinking green at
long intervals (on
Local maintenance is in progress.
for 1s and then off
for 1s)
Blinking green at
short intervals (on
Local maintenance fails.
for 0.125s and then
off for 0.125s)
Steady green Local maintenance succeeds.
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