Radio Frequency Interference
Fault Finding
Radio Frequency Interference (RFI) can be a problem for owners of inverters.
RFI in a domestic situation may produce noise or interference on a radio or
TV receiver.
No indicators ON when power is first applied
When first connected, if the LD450-12 shows no indicators the battery
connections may be reversed. Check that the red battery wire (10) is
connected to the battery positive, and the black battery wire (11) is connected
to the battery negative. Remember there is a 3 second delay before power is
available after switch ON.
Considerable development time has resulted in a reduction of the RFI
generated by the inverter to a level that complies with C-tick requirements.
Compliance to this standard means RFI is low, but how well the inverter
performs in a particular installation can vary. Below are some suggestions to
help reduce the effects of RFI in your installation;
Inverter stays ON when no appliance is being used
This can be a common problem known as a “Phantom Load”, but can be
easily overcome. Some appliances will need to be switched off at the power
point as they may still represent a small load despite being switched off at the
appliance.
•
It is recommended that the power system including the inverter be
housed at least 15 metres from the home.
Check again to make sure that there are no appliances left ON, the
sequentially switch off appliances at the wall and by watching your night light
(as described in Handy Hint, check to see if the LD450-12 returns to pulsing
(SLEEP) mode after a 10 second delay. Once you have found the offending
appliance, increase the sensitivity of the “Demand Start” (see page 11) until
the inverter turns OFF. Once this is done re check that small loads will still
bring the inverter ON when required.
•
Ensure an earth stake is placed as close to the inverter as possible and
connected to the inverter via a short length of wire. See page 2 for
wiring details.
•
Avoid running DC cables into the home, if at all possible. If this
cannot be avoided, run DC and AC in separate conduits separated by
as much distance as practicable. All DC wiring should also be kept
together and be as short as possible.
Inverter shuts down during the middle of the day, and comes
back ON late in the afternoon
•
If your inverter is to be installed in a mobile home or similar, try to
keep your inverter at least one metre away from your radio or audio
equipment. The further the better.
This is more than likely caused by high battery volts during peak charging
times from Solar Panels. Battery volts should never exceed 17 volts. If this is
the case, have your Solar Regulator checked.
LD450-12 Manual
Selectronic Australia
13
LD450-12 Manual
Selectronic Australia
14
