4.2 CAUTION
1、If there is problem with the digital display and CV
indicator does not light after power on, the fuse probably
was broken, or power cable is poor contact and other fault,
Power off and disconnect the power cord, check whether
the power cord and the socket is good contact, or whether
the fuse is broken (change the fuse if necessary).
2、When working in Constant Voltage state，if output voltage
lower than what was preset and CC indicator lights, in order
to protect current, the instrument automatically turn to
Constant Current state. You must check the load or increase
the output current according to load.
3、When working in Constant Voltage state, if output current
lower than what was preset and CV indicator lights, in
order to protect open-circuit voltage, the instrument
automatically turn to Constant Voltage state. You must
check the load or increase the output voltage according to
use status.
4、When the instrument is unstable in Constant Voltage state，
Probably the AC input voltage is under 90% of the rated
value. Please check whether the power supply voltage is
within the rated. If the problem is not caused by the line
voltage, contact your nearest dealer.
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