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7.1.2 Trouble shooting for fault codes in LCD display
Code
Fault Event
Action
01
Bus over voltage
1. Disconnect ALL PV(+), PV(-) and Grid
2. Wait for few seconds
3. After the LCD switches off, reconnect
and check again
4. If the message still remains, the inverter
may damage. Please refer to section 7.2.2.
02
Bus under voltage
03
Bus soft start time out
04
Inverter soft start time out
05
Inverter over current
07
Relay fault
08
DC current sensor fail
10
Power down
11
PV input short
14
Inverter DC current over
16
GFCI sensor fail
06
Over temperature
1. The internal temperature is higher than
specified normal value
2. Find a way to reduce the ambient
temperature.
3. Or move the inverter to a cooler
environment.
4. if the measures above are useless,
check the temperature sensor and the
related circuit.
09
PV high voltage
1. Check if the open PV voltage is greater
than or close to 500VDC
2. If PV voltage is less than 500VDC and
the problem still occurs, please refer to
section 7.2.2
12
GFCI over
1. The ground current is too high
2. Disconnect from PV modules and check
the grounding connection of AC utility
3. After the problem is solved, re-plug the
PV panel and check the inverter status.
13
PV isolation low
Check the impedance between PV (+) &
PV (-) to the ground. The impedance must
be greater than 1MΩ
15
Line value consistent fail
between MCU & DSP
1. Disconnect PV(+) , PV(-) from the input,
restart the inverter.
2. If it does not work, please replace the
CNTL board.
17
Connect fail between
MCU & DSP
18
Communication fail
between MCU & DSP
19
Ground loss
Make sure the inverter connected to the
ground
20
Discharge fail
Check the discharge circuit, examine the
control signal.
21
Discharge Soft Time Out