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Table 7-7 LCD Troubleshooting FAULT
Type Error/State Fault Description / Instruction
Fault
Fault0020
(Bus over volt
Hardware)
1. Restart inverter by turning both AC and DC switches
OFF. Wait for 5 minutes for all energy to discharge and
turn both switches ON
2. If inverter cannot clear fault, replace inverter
Fault0060
(CPLD Fault)
1. Restart inverter by turning both AC and DC switches
OFF. Wait for 1 minute for all energy to discharge and
turn both switches ON
2. If inverter cannot clear fault, replace Control Board or
inverter
Fault0080
(Bus Hardware over
current fault)
1. Restart inverter by turning both AC and DC switches
OFF. Wait for 1 minute for all energy to discharge and
turn both switches ON
2. If inverter cannot clear fault, replace inverter
Fault0090
(Dynamic leakage current
high)
Check wires of PV and ground:
1. Turn OFF AC switch to disconnect inverter from grid
2. Open fuse holders to isolate PV strings. Test strings
with meter
3. Add one PV string and start inverter to see if alarm
occurs.
4. If no alarm, turn OFF AC switches to disconnect from
grid and add in the next string. Start inverter again.
5. Continue until the string that triggers the alarm is
identified. Trace back the faulted string to find any
Fault0100
(Grid relay fault)
1. Restart inverter by turning both AC and DC switches
OFF. Wait for 5 minutes for all energy to discharge and
turn both switches ON
2. If inverter cannot clear fault, replace inverter
Fault0110
(Bus imbalance)
1. Raise limit of IDCmax (for example, 400mA) to allow
inverter more room to adjust in transient condition to
cope with imbalance of impedance and voltage
between grid phases
2.
If after adjustment, alarm still occurs, replace inverter
Fault0130
(Bus over total voltage)
1. Restart inverter by turning both AC and DC switches
OFF. Wait for 5 minutes for all energy to discharge
between OFF and turn both switches ON
2. If inverter cannot clear fault, replace inverter
Fault0150
(Open-loop self-check
failure)
1. Restart inverter by turning both AC and DC switches
OFF. Wait for 5 minutes for all energy to discharge and
turn both switches ON
2. If inverter cannot clear fault, replace inverter
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