CD Automation CD3000 E-3PH, Руководство пользователя

Страница: 59 / 59

CD Automation srl CD3000E-3PH from 25A to 500A User’s Manual
59
16 Maintenance
16.1 Fans
The thyristor unit with forced ventilation uses fans that rotate permanently when the unit is supplied. In
case of fan failure, the heat-sink can be reach high temperature. In this case to give protection to
thyristor there is a thermal switch properly setted. The function of this switch is to open the input signal
until the heat-sink temperature falls below the setted value. This means that also with input signal in ON
condition the unit is switched OFF and the system can not work at full power. For this reason is
important to control periodically the fans status checking that are rotating.
16.2 Maintenance
For maintain a correct cooling, the consumer must clean the heat-sink and the protective grate of the
fans. The frequency of these operations depends on the atmospheric local pollution.
Check also that the screw of the power terminals and earth terminals are shut correctly
(see Diagram of control connection).
16.3 Repairing procedure
•
Phone to CD Automation.
•
Explain to Service Engineer the problem because sometimes it can be solved with a phone call.
If this is not possible, ship the unit to CD Automation or to your distributor.
•
Write a fault description and give the name of your personnel to which refers.
•
Use a rugged packaging to ship the unit.
16.4 Warranty condition
CD Automation gives a 12 months warranty to its products. The warranty is limited to repairing and
parts substitution in our factory and does exclude products not properly used and fuses.
Warranty does not include products with serial numbers deleted. The faulty product should be shipped to
CD Automation at customer’s cost and our Service will evaluate if product is under warranty terms.
Substituted parts remain of CD Automation property.
ENG CD3000E-3PH_25-500A - 02.DOC