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8. Troubleshooting
LCD display
Possible actions
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Isolation Fault
1. Check the impedance between PV (+) & PV (-) and the
inverter is earthed. The impedance must be greater than
2M
Ω
.
2. Check whether the AC-side has contacts with earth.
Current Fault
1. The ground current is too high.
2. After cut off the AC side connection, unplug the inputs
from the PV generator and check the peripheral AC
system.
3. After the cause is cleared, re-plug the PV panel and AC
connection, and check PV-Inverter status.
Master Grid Freq Fault
Master Grid Volt Fault
1. Wait for a moment, if the grid returns to normal, PV-
Inverter automatically restarts.
2. Make sure grid voltage and frequency meet the
specifications.
No Utility
1. Grid is not connected.
2. Check grid connection cables.
3. Check grid usability.
4. If grid is ok, and the problem persists, maybe the fuse in
the inverter is open, please call service.
Over Temp Fault
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.
PV Voltage Fault
1. Check the open PV voltage; see if it is greater than or too
close to 500VDC (for Z10I1K, Z10I1K5, Z10I2K, Z10I2K5
or Z10I3K).
2. If PV voltage is less than 500VDC, and the problem still
occurs, please call local service.
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ENS Grid Voltage Fault
ENS Grid Freq Fault
Disconnect PV (+) or PV (-) from the input, restart the
inverter.
Relay1 Fault
Relay2 Fault
1. Disconnect ALL PV (+) or PV (-).
2. Wait for a few seconds.
3. After the LCD switches off, reconnect and check again.
4. If the problems remain please call local service.
Current DC Offset
Eeprom Fault
SCI Lose
Hole Sense Device Fault
GFCI Device Fault
