Omron KP100L-OD - 12-2010 User Manual page 98

E1-8: Under voltage instantly (Grid)
Situation
Possible Cause
Remedy for User
Remedy for Professional
E2-1: Over voltage (DC)
Situation
Possible Cause
Remedy for User
Remedy for Professional
E2-3: Ground I Fault
Situation
Possible Cause
Remedy for User
Remedy for Professional
Grid Connect Photovoltaic Inverter KP100L-OD- USER'S MANUAL
The grid voltage drops below 110V.
1. AC connection is not correct.
2. Grid condition is weak or unstable.
3. Other high-power consumption device is affecting the grid system.
4. Inverter is abnormal.
1. If this problem occurs seldom (such as 1 time a day), no action is necessary.
Operation will restart automatically when the grid voltage returns to normal.

If the problem occurs frequently, do the actions below.
2. Find the device with high power consumption near your AC system.
3. Consult your utility power supplier, understand the grid conditions.
4. Ask help of your installer.
1. Check the system connection including polarities and security first.
2. Find the devices with high power consumption near the AC system.
3. Consult the utility power supplier, understand the grid conditions.
4. Use Inverter software to monitor the frequency and voltage.
5. If the situation is not improved, please replace the Inverter.
The detected PV voltage is higher than specification.
1. The PV array voltage is too high.
2. Inverter is abnormal.
1. If the fault continues, contact the store from which you purchased the product or your
installer.
1. Check the open PV voltage, and see if it is more than or too close to specification.
2. If PV voltage is much less than specification and the problem still occurs, please
replace the Inverter.
The fault current detected by the Inverter is higher than threshold.
1. Obstacle, humidity or water exits between AC LINE and/or NEUTRAL to earth
ground.
2. Obstacle, humidity or water exits between AC LINE and/or NEUTRAL to earth ground
in the junction box.
3. The Insulation of AC wires is broken that could be bit by rat or any animals.
4. Inverter is abnormal.
1. Disconnect AC connection of Inverter by opening AC switch.
2. Check the AC junction box and wiring of system. Clear obstacle ONLY IN SAFE
CONDITIONS
3. Reconnect AC connection, check the status of Inverter.
4. If the problem persists, contact the store from which you purchased the product or
your installer.
1. Disconnect AC side of Inverter by opening AC switch.
2. Disconnect the DC side from the Inverter.
3. Check both the AC and DC wiring and insulation.
4. Reconnect AC connection, check the status of Inverter
5. If the problem persists, please replace the Inverter.
4 Maintenance Operations
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