Delta PhotoVoltaic RPI-C500, Manual

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I
NSTALLATION
G
UIDE
60
T
ROUBLESHOOTING
E
RROR
M
ESSAGE AND
T
ROUBLESHOOTING
Table 6-4: Fault Message (Continued)
Message Possible cause Action
HW Red ADC2
1. Auxiliary power circuitry
malfunction
2. Detection circuit malfunction
1. Check the auxiliary circuitry inside
the inverter
2. Check the detection circuit inside
the inverter
HW COMM2
1. Red. CPU is idling
2. The communication connection is
disconnected
1. Check the function of reset pin and
crystal in Red. CPU
2. Check the connection between
Red. CPU and DSP
HW COMM1
1. DSP is idling
2. The communication connection is
disconnected
3. The communication circuit mal-
function
1. Check the function of reset pin and
crystal in DSP
2. Check the connection between
DSP and COMM
3. Check the communication circuit
HW Connect Fail
1. Power cables fall off inside the
inverter
2. Current feedback circuit is
defective
3. Driver circuit of inverter
malfunction
1. Check the power cables inside
the inverter
2. Check the current feedback circuit
inside the inverter
3. Check driver circuit of the inverter
Relay Test Short
1. The driver circuit for the contactor
malfunction
2. The contacts of contactor are
stuck
1. Check the driver circuit inside the
inverter
2. Replace a new contactor
Relay Test Open
1. Driver circuit for Contactor is
defective
2. Contactor coil is defective
3. The detection accuracy is not
correct for Vgrid and Vout
1. Check the driver circuit for
contactor
2. Replace contactor coil
3. Check the Vgrid and Vout voltage
detection accuracy
HW Bus OVR
1. Power BackFeed Occurred (DC
Power < AC Power)
2. Something wrong with AC
Frequency PLL
1. Check the connection between
Solar Panel and Inverter
2. Check the Vgrid and Vout voltage
detection accuracy