11
10
7. COMMISSIONING
WARNING:
ENSURE THAT ALL AC AND DC WIRING IS CORRECT. ENSURE THAT NONE OF THE
AC AND DC WIRES ARE PINCHED OR DAMAGED AND THAT ALL JUNCTION BOXES ARE
PROPERLY SEALED CLOSE.
Following these steps to commission the BDM-500 PV system:
1. Turn on the circuit breakers for each of the BDM-500 AC branch circuits.
2. Turn on the main service panel u
�l
ity-grid AC circuit breaker. Your system will start
producing power a
�
er no more than 5 minutes.
3. The BDM-500 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-500 in the system to communicate to the BDG-256 will vary with the number
of microinverters in the system. For a typical residen
�
al system data acquisi
�
on
should take no more than 20-25 minutes.
8. OPERATING INSTRUCTIONS
The BDM-500 begins opera
�
on only a
�
er su
ffici
ent DC voltage from the PV module
is received. At this point the status LED will start
fl
ashing.
Status: standby
The LED light toggles on and o
ff
at two (2) second intervals
Red
:error detected
Orange
: no error, but not yet communica
�
ng to the BDG-256
Green
: no error, and communica
�
ng to the BDG-256
Status: producing power
The LED light toggles on and o
ff
at one (1) second intervals
Orange
: not communica
�
ng to the BDG-256
Green
: communica
�
ng to the BDG-256
11
Status: grounding fault
The LED light is in
solid red
color.
In case of a fault, the BDM-500 enters a protec
�
ve mode and stops output
�
ng
power. The fault message is usually sent to a connected BDG-256 gateway through
the power line communica
�
on. The error message is then displayed on the screen
of BDG-256 gateway by a 16-bit error code. The table below shows the codes:
Error code
Error
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
9. TROUBLESHOOTING AND MAINTENANCE
WARNING:
DO NOT ATTEMPT TO REPAIR THE BDM-500; IT CONTAINS NO
USER-SERVICEABLE PARTS. IF TROUBLESHOOTING METHODS FAIL, PLEASE CONTACT NEP FOR
FURTHER ASSISTANCE.
WARNING:
NEVER DISCONNECT THE DC WIRE CONNECTORS UNDER LOAD. ENSURE THAT
NO CURRENT IS FLOWING IN THE DC WIRES PRIOR TO DISCONNECTING. AN OPAQUE
COVERING MAY BE USED TO COVER THE MODULE PRIOR TO DISCONNECTING.
WARNING:
BDM-500 IS POWERED BY DC POWER FROM PV MODULES. MAKE SURE YOU
DISCONNECT THE DC CONNECTIONS AND RECONNECT DC POWER TO WATCH FOR THE TWO
SECONDS LED ON/OFF TOGGLE AFTER DC IS APPLIED.
