Vacon NXV0010 - Troubleshooting Common Issues

40 • vacon MAINTENANCE AND TROUBLESHOOTING
7.2 Troubleshooting
The microprocessor for the Vacon solar inverter continuously monitors the running condition of the
inverter and the elements connected to it.
If the microprocessor finds any abnormal running values or that some of the elements do not work
correctly, the device issues an alarm signal, if the malfunction does not imply any kind of a safety
hazard for the inverter or the installation, and it issues a fault signal if there is any kind of a safety
hazard for the inverter or the installation.
Every indication of fault or alarm is shown on the control panel described in chapter 6. In the control
panel, the letter A (Alarm) or F (Fault) appears together with the order number of the Fault or Alarm,
the fault or alarm code and a short description.
The fault can be reset using the reset push button on the control panel.
Below you can find the fault and alarm codes, their causes and how to solve them.
THE SOLUTION FOR SOME OF THE PROBLEMS INDICATED HERE IMPLIES TO PER-
FORM CHECKING INSIDE THE INVERTER, THE WIRES OF AC MAINS OR THE DC
WIRES IN THE SOLAR PANELS. THESE CHECKS HAVE TO BE CARRIED OUT TAKING
THE INSTRUCTIONS IN CHAPTER 1 INTO ACCOUNT.
REPAIR WORK SHOULD ONLY BE CARRIED OUT BY A QUALIFIED TECHNICIAN.
THERE IS A RISK OF AN ELECTRIC SHOCK.
Fault
code
Fault
Possible cause
Correcting measures
1
Overcurrent
- AFE has detected too high a current
(>4*I
H
) in the cables:
2
Overvoltage
The DC-link voltage has exceeded the
drive limit. See User manual.
- high overvoltage spikes in supply
- Check input voltage
3
Earth fault
Current measurement has detected that
the sum of phase currents is not zero.
−
insulation failure in cables
- Check cables.
4
Inverter fault
5
Charging
switch
The charging switch is open, when the
START command has been given.
− faulty operation
−
component failure
- Reset the fault and restart.
- Should the fault re-occur, contact your
local distributor.
7
Saturation trip
Various causes:
− defective component
- Cannot be reset from the keypad.
- Switch off power.
- DO NOT RE-CONNECT POWER!
- Contact your local distributor.