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Problem Cause Solution
Temperature of surrounding air is too low
Temperature of surrounding air should
not drop under –10°C. Keep the
device switching on and off till the
Voltage Changer operates correctly
again.
Battery voltage under 10 V Charge the battery or replace it
Connected devices consume too much current
Reduce the number of appliances and
hence the current loading.
Voltage Changer protection against overheating
is activated.
Let the device getting cool.
Ensure sufficient cooling.
Reduce number of apliances and
current loading.
The device does not work.
Bad condition of battery
Check the battery and replace it if
necessary
Low voltage alarm system is
permanently on.
Insufficient power supply source or drop of the
voltage
Check the battery terminals. If
necessary clean them or replace them.
Measuring with unsuitable voltmeter
Use the voltmeter for measuring in
RMS mode (efficient value).
Voltage Changer is overloaded.
Reduce number of appliances and
hence the curent loading.
Slight output voltage.
Input voltage under 11 V. Charge the battery or replace it
Place the Voltage Changer as far from
the radio as possible
Disconnect leading-in and receiving
cable.
Failure in television and radio
reception.
Elektromagnetic interferences caused by the
convertor.
Have the radio input signal checked
and use screened cables.
Have the Voltage Changer checked by
special service workshop
Growling or humming in
audiosystem.
Power supply source of the audioapparatus
does not filter completely the modified sinusoid
wave of the Voltage Changer.
Use audiosystem whose power supply
source can suppress interference
Have the device tested in the
professional service workshop.
MEASURING OF ALTERNATING VOLTAGE
AC Voltage Changer uses a MODIFIED SINE WAVE.
Use only AUTENTIC RMS VOLTMETER for measuring output AC voltage. Other voltmeters give
value by 20 to 30 V lower than normal value. It is only RMS voltmeter that guarantees reliable result.
Volt Peak
Volt RMS
0
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