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1. Insufficient input power
HW DSP
2. Auxiliary power circuitry
ADC2
malfunction
(F16)
3. Detection circuit malfunction
1. Insufficient input power
HW DSP
2. Auxiliary power circuitry
ADC3
malfunction
(F17)
3. Detection circuit malfunction
1. Insufficient input power
HW Red
2. Auxiliary power circuitry
ADC1
malfunction
(F18)
3. Detection circuit malfunction
1. Insufficient input power
HW Red
2. Auxiliary power circuitry
ADC2
malfunction
(F19)
3. Detection circuit malfunction
1. The calibration is incorrect
HW Eff.
2. Current feedback circuit is
(F20)
defective
1. DSP is idling
HW
2. The communication
COMM1
connection is disconnected
(F23)
3. The communication circuit
is malfunction
HW
1. Red. CPU is idling
COMM2
2. The internal communication
(F22)
connection is disconnected
1. PV array insulation fault
2. Large PV array capacitance
between Plus to Ground or
Ground Cur.
Minus to Ground
(F24)
3. Either side of boost driver
or boost choke malfunction
4. Detection circuit malfunction
Possible cause
Error message and Trouble Shooting
FAULT
1. Check the input voltage, must >150Vdc
2. Check the auxiliary circuitry inside the
inverter
3. Contact our customer service for
technical support
1. Check the input voltage, must >150Vdc
2. Check the auxiliary circuitry inside the
inverter
3. Contact our customer service for
technical support
1. Check the input voltage, must >150Vdc
2. Check the auxiliary circuitry inside the
inverter
3. Contact our customer service for
technical support
1. Check the input voltage, must >150Vdc
2. Check the auxiliary circuitry inside the
inverter
3. Contact our customer service for
technical support
1. Check the accuracy of current and power
2. Check the current feedback circuit
inside the inverter
1. Contact our customer service for
technical support
2. Check the connection interface RS-485
3. Check the communication card
Contact our customer service for
technical support
1. Check the insulation of Solar inputs
2. Check the capacitance (+ <-> GND &
- <-> GND), must < 2.5uF. Install a
external transformer if necessary
3. Contact our customer service for
technical support
61
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