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Operation Manual
7. PAUSE FUNCTION
• This function is designed to protect a connected device with the use of turn-on delay of the AVR
after power supply resumption. The AVR will turn on after 10 sec. after power supply resumption (at
that time indicator displays the countdown to its turning on).
8. PROTECTION FUNCTION AGAINST HIGH AND LOW INPUT VOLTAGES, OVERLOAD AND
OVERHEATING
• The AVR is equipped with automatic protection circuit against high and low input voltages. When
the power supply voltage exceeds the operating range (140 – 265 V), the load is disconnected auto-
matically and indicator displays "L" or "H". After normal voltage resumption the AVR is turned on
automatically and resumes its operation.
• The AVR is equipped with the transformer thermal protection, which protects the device against
overload and overheating. The built-in transformer thermal protection is activated when the tempera-
ture is 120 °C and the load is disconnected (indicator displays "С"). The AVR is turned on automa-
tically after its cooling.
9. TROUBLESHOOTING
Problem
The AVR does not start.
The AVR is turned on, but
there is no output voltage.
The AVR often produces
clicking sounds.
The AVR has disconnected
the load. Indicator displays
"L" or "H".
If none of the above methods can solve the problem, please seek professional advice at your
nearest service center. Never attempt to repair the product by yourself.
STAB-300/500/1000/2000
Cause
1. The switch is off.
2. There is no voltage in the
power supply network.
3. The fuse has activated.
4.The load connected is too
powerful.
The AVR is out of order.
Input voltage is very
unstable.
Input voltage is beyond
possible regulation range of
140 – 265 V.
Technical support: www.real-el.com
Solution
1. Press the switch once again.
2. Make sure that power supply
is available.
3. Disconnect the AVR from the
power supply and change the
fuse.
4. Disconnect some load.
If the problem is not eliminated,
please address an authorized
service center.
It is normal. The AVR regulates
output voltage.
When input voltage is
normalized, the AVR tuns on
automatically.
ENG
5
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