VOLTCRAFT CPPS-320-42, Operating Instructions Manual

Page: 66 / 140

66
20. TroubLEShooTINg
By purchasing the laboratory power unit, you have acquired a product that is reliable and operationally safe.
Nevertheless, problems or errors may occur.
For this reason we want to describe how to troubleshoot potential malfunctions:
Always follow the safety instructions!
Error Possible cause
The power unit cannot be switched on. • Does the indicator C.V. or C.C. light up?
• Check the mains voltage (you may also want to check the
mains fuse in the device or the line circuit breaker).
Connected consumer devices do not
work.
• Is the voltage set correctly?
• IIs the polarity correct?
• Check the technical data of the consumers.
The control indicator REMOTE is lit. The
device can not be operated via the rotary
controls.
Remote control operation is active.
The control indicator C.C . is lit. Constant current operation:
The preset current was exceeded. Check power consumption on
your consumer and increase the current limitation on your power
unit, if applicable.
The control indicator C.V. LED is lit. Constant voltage operation
The power unit works normally. The output provides the constant
voltage set.
Display “OVP“ Over-voltage protection: See chapter “protective measures“.
Display “OtP“ Over-voltage protection: See chapter “protective measures“.
Display “OLP“ Over-voltage protection: “See chapter protective measures“.
other inspections than those described above may only be carried out by an authorised speci-
alist. If you have any questions concerning the handling of the device, please do no hesitate to
contact our Technical support.