Delta RPI-M8 User Manual page 58

1. Insufficient input power
2. Auxiliary power circuitry
HW DSP
malfunction
ADC3
3. Detection circuit malfunction
1. Insufficient input power
2. Auxiliary power circuitry
HW Red
malfunction
ADC1
3. Detection circuit malfunction
1. Insufficient input power
2. Auxiliary power circuitry
HW Red
malfunction
ADC2
3. Detection circuit malfunction
1. The calibration is incorrect
HW
2. Current feedback circuit is
Efficiency
defective
1. Red. CPU is idling
2. The communication
HW COMM2
connection is disconnected
1. DSP is idling
2. The communication
connection is disconnected
HW COMM1
3. The communication circuit
malfunction
1. PV array insulation fault
2. Large PV array capacitance
between Plus to Ground or
Ground
Minus to Ground
Current
3. Either side of boost driver or
boost choke malfunction
4. Detection circuit malfunction
1. Power line is disconnected
inside the inverter
HW Connect
2. Current feedback circuit is
Fail
defective
1. RCMU is disconnected
RCMU Fail
2. Detection circuit malfunction
1. Check the input voltage, must > 150Vdc
2. Check the auxiliary circuitry inside the inverter
3. Check the detection circuit inside the inverter
1. Check the input voltage, must > 150Vdc
2. Check the auxiliary circuitry inside the inverter
3. Check the detection circuit inside the inverter
1. Check the input voltage, must > 150Vdc
2. Check the auxiliary circuitry inside the inverter
3. Check the detection circuit inside the inverter
1. Check the accuracy of current and power
2. Check the current feedback circuit inside the
inverter
1. Check reset and crystal in Red. CPU
2. Check the connection between Red. CPU and
DSp
1. Check reset and crystal in DSP
2. Check the connection between DSP and
COMM
3. Check the communication circuit
1. Check the insulation of Solar inputs
2. Check the capacitance (+ <-> GND & - <->
GND), must < 2.5uF. Install a external
transformer if necessary
3. Check boost driver & boost choke
4. Check the detection circuit inside the inverter
1. Check the power lines inside the inverter
2. Check the current feedback circuit inside the
inverter
1. Check the RCMU connection inside the
inverter
2. Check the detection circuit inside the inverter
57