What to do if my CMS 4000 shows 'Ground I Fault'?
If your CMS Inverter displays a 'Ground I Fault', it indicates that the ground current is too high. To resolve this, unplug the inputs from the PV generator and check the peripheral AC system. After addressing the cause, re-plug the PV panel and check the PV-Inverter status. If the issue persists, contact service.
Why does my CMS 4000 Inverter show 'Inverter Failure'?
An 'Inverter Failure' message on your CMS Inverter can occur due to several reasons. One potential cause is PV over voltage, meaning the open PV voltage is greater than or too close to 550VDC, so check the open PV voltage. If the PV voltage is less than 550VDC, and the problem still occurs, please call local service. Another cause might be a consistent fault. In this case, disconnect PV (+) or PV (-) from the input, and then restart the PV-Inverter. If the problem persists, contact service.
What to do if my CMS Inverter shows 'Grid Fault'?
If your CMS Inverter is showing a 'Grid Fault', wait for 5 minutes to see if the grid returns to normal; the PV-Inverter will automatically restart. Also, ensure that the grid voltage and frequency meet the specified requirements. If the problem persists, please call service.
What should I do if my CMS 4000 has no display on the panel?
If there is no display on the panel of your CMS Inverter, first check the PV-input connections. If the voltage is higher than 150V, contact your local service.
Why does my CMS 4000 Inverter continuously start up and shut down?
Continuous start-up and shut down of your CMS Inverter is due to insufficient power generated to operate the control circuits.
What to do if my CMS 4000 Inverter shows 'Disconnect Grid'?
If your CMS Inverter displays 'Disconnect Grid', it indicates that the grid is not connected. Check the grid connection cables and verify grid usability.
To Next Page
General