User Manual of String Inverter
30
5.2 Troubleshooting
Boost side
Fault
word
ID
Fault/alarm name
Cause of failure/alarm
Troubleshooting
Fault
word 1
0
Auxiliary power
supply overvoltage
12V below or above
auxiliary power supply is too
high
1. Reset and check if the converter
works normally.
2. If it appears frequently, please contact
Hopewind technical staff.
1
Auxiliary power
supply under voltage
12V below or above
auxiliary power supply is too
low
1. Reset and check if the converter
works normally.
2. If it appears frequently, please contact
Hopewind technical staff.
2
Output hardware
overvoltage
The output voltage exceeds
the protection point set by
the hardware.
1. Reset and check if the converter
works normally.
2. If it appears frequently, please contact
Hopewind technical staff.
3
Hardware
overcurrent (level 2)
Unit inductor current is too
large.
1. Reset and check if the converter
works normally.
2. If it appears frequently, please contact
Hopewind technical staff.
4
Unit 1 hardware
overcurrent
Unit 1 overcurrent and
reached the hardware
wave-by-wave current limit
time.
1. Reset and check if the converter
works normally.
2. If it appears frequently, please contact
Hopewind technical staff.
5
Unit 2 hardware
overcurrent
Unit 2 overcurrent and
reached the hardware
wave-by-wave current limit
time.
1. Reset and check if the converter
works normally.
2. If it appears frequently, please contact
Hopewind technical staff.
6
Unit 3 hardware
overcurrent
Unit 3 overcurrent and
reached the hardware
wave-by-wave current limit
time.
1. Reset and check if the converter
works normally.
2. If it appears frequently, please contact
Hopewind technical staff.
7
Unit 4 hardware
overcurrent
Unit 4 overcurrent and
reached the hardware
wave-by-wave current limit
time.
1. Reset and check if the converter
works normally.
2. If it appears frequently, please contact
Hopewind technical staff.
Fault
word 2
2
EEPROM
parameters back to
default value
EEPROM read and write
errors.
Reset or power-off processing.
3
History failure
storage failure
History failure storage
failure.
Reset or power-off processing.
12 Input polarity
reversed
Reverse input polarity.
Check if the connection is reversed.
13 Positive bus bar
insulation fault
Abnormal insulation
resistance of positive bus
bar to ground.
Check the positive bus for ground faults.
14 Negative bus bar
insulation fault
Abnormal insulation
resistance of negative bus
bar to ground.
Check the negative bus for ground
faults.
Alarm
word 1
0
SPD alarm
Feedback SPD failure of in
wrong state.
1. Reset and check if the converter
works normally.
2. If it appears frequently, please contact
Hopewind technical staff.
6
Open circuit warning
on boost side
Boost unit open circuited.
Please contact Hopewind technical staff.
7
Short circuit warning
Boost unit short circuited.
Please contact Hopewind technical staff.
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