5. COMMISSIONING
WARNING:
CONNECT BDM-250 TO THE ELECTRICAL UTILITY GRID ONLY AFTER RECEIVING
PRIOR APPROVAL FROM THE UTILITY COMPANY.
WARNING:
BE AWARE THAT ONLY QUALIFIED PERSONNEL CAN CONNECT BDM-250 TO THE
ELECTRICAL UTILITY GRID.
WARNING:
ENSURE THAT ALL AC AND DC WIRING IS CORRECT. ENSURE THAT NONE OF THE
AC AND DC WIRES IS PINCHED OR DAMAGED. ENSURE THAT ALL JUNCTION BOXES ARE
PROPERLY CLOSED.
Following these steps to commission the BDM-250 PV system:
1. Turn on the AC disconnects or circuit breakers on each BDM-250 AC branch circuit.
2. Turn on the main u
�li
ty-grid AC circuit breaker. Your system will start producing
power a
�
er a few minutes wait
�
me.
3. The BDM-250 will start to send performance data over the power lines using
power line communica
�
on (PLC) to the BDG-256. The
�
me required for each
BDM-250 in the system to communicate to the BDG-256 will vary with the number
of BDM-250 in the system.
10
6. OPERATING INSTRUCTIONS
The BDM-250 is powered on when su
ffi
cient DC voltage from the module is applied.
The status LED will start
fl
ashing a
�
er su
ff
icient DC power is applied as an indica
�
on
that the BDM-250 is live.
Status: standby
The LED light is on by 2 second, and o
ff
by 2 seconds.
Status: pr
o
ducing p
o
wer
The LED light is on by 1 second, and o
ff
by 1 second.
Status: pr
o
ducing p
o
wer and c
o
mmunica
�
ng with
BDG-256
The LED light is on by 0.5 second, and o
ff
by 0.5 second.
In case of fault, BDM-250 has mul
�
ple protec
�v
e func
�
ons and stops output power.
The fault message may be sent to a connected BDG-256 gateway through power
line communica
�
on. The error message is displayed on the screen of BDG-256
gateway by a 16-bit error code.
Err
o
r c
o
de
Err
o
r
Bit-0
DC over voltage
Bit-1
DC under voltage
Bit-2
hardware error
Bit-3
Inverter over voltage
Bit-4
Frequency over
Bit-5
Frequency under
Bit-6
AC voltage RMS over
Bit-7
AC voltage RMS under
Bit-8
Peak AC voltage over
Bit-9
AC current RMS over
Bit-10
Peak AC current over
Bit-11
Temperature over
Bit-12
ADC error
Bit-13
GFDI fault indicator
Bit-14
Relay fault (BDM-250-AU/BDM-250-EU only)
Bit-15
PLC Communica
�
on Error
11
10
