Protect0180
(The sampling
offset of DCI)
1. If the inverter can start up, then recalibrate
2. If the inverter consistently reports this alarm
and can not start up, then replace inverter
1. Raise limit of DCImax (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. After raising the limit, if inverter cannot clear fault,
replace inverter
Table 7-5 LCD Troubleshooting PROTECTION (cont.)
Fault Description / Instruction
IsolationErr
(Insulation resistance
low)
Check wires of PV and ground:
1. Turn OFF AC switch to disconnect from grid
2. Open fuse holders to isolate PV strings. Test
strings with string test set.
3. Add one PV string at a time, and start up
inverter to see if alarm occurs.
4. If no alarm, turn OFF AC switches to
disconnect from grid and add the next string.
Turn AC switch on and start up inverter again
5. Continue until you can find the string that
triggers the alarm. Trace back the faulted
string to find any leakage to Earth Ground
6. The parameter “ISOResist” in hidden menu
can be adjusted
GFCIErr
(leakage current high)
Check wires of PV and ground:
1. Turn OFF AC switch to disconnect from grid.
2. Open fuse holders to isolate PV strings. Test
strings with string test set
3. Add one PV string at a time and start up
inverter to see if alarm occurs.
4. If no alarm, turn OFF AC switches to
disconnect grid, add in the next string. Start
inverter again
5. Continue until the string that triggers the
alarm is identified.
6. Trace back the faulted string to find any
leakage to Earth Ground
Protect0150
(Mini MCU 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
To Next Page
Loading...
