21
Fault
Display
Possible actions
Inverter
failure
PV Over
Voltage
1.
Check the PV open voltage, see if it is more than or too close to
500VDC.
2.
If PV voltage is much less than 500VDC (e.g. <430V), measure the
DCV by multi-meter, compare the readings on meter and LCD,
if >5%, replace another unit.
Consistent
Fault
1.
It is caused by the reading between main and redundant controllers
are different.
2.
Disconnect PV (+) or PV (-) from the input, start the unit again.
3.
If this does not work, replace another one.
Device Fault
1.
Caused by improper operation of the circuit.
2.
Disconnect PV (+) or PV (-) from the input, start the unit again.
3.
If it does not work, replace another one.
Over
Temperature
1.
The internal temperature is higher than specified normal value.
2.
Reduce the ambient temperature by some other ways or move
inverter to cooler place.
3.
If it is not effective, the temperature sensors fails, replace another
one.
