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Chapter 6 Preventative Maintenance
6.1 Troubleshooting
The PV-Inverter requires very little maintenance. When unexpected situation
occurs, please refer to the following table for quick troubleshooting before
contacting your local service. The following table lists common fault messages
and ways to cope with the fault or error.
System Fault Explanation
Action / Fault Clearance
PV
IMPEDANCE
LOW
Resistance from either PV inputs
to Earth Ground is lower than
600 kOhm
Impedance from PV arrays to Earth Ground
is low. PV arrays may need cleaning or
drying.
Inverter will continually test impedance
again during Start-up Sequence in case low
impedance caused by moisture on PV
panel, and moisture will dry up later in the
day.
Check any short from PV terminals to Earth
Ground.
ISOLATION
FAULT
Disconnecting relays between
Inverter and Grid do not work
properly
Need to recycle power to Inverter. Inverter
will retest relays during Start-up sequence.
If Fault Message occurs again, contact your
local service.
PV GND
FAULT
Fault current from PV arrays to
Earth Ground
Check impedance from PV arrays to Earth
Ground. PV arrays may need cleaning or
drying.
Need to recycle power to Inverter to restart.
