Honeywell
CD3000S-3PH from 125A to 500A
User’s Manual
9.2 Repairing procedure
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Phone to us.
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Explain to Service Engineer the problem because sometimes it can be solved with a phone call.
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If this is not possible ship the unit to us or to your distributor.
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Write a fault description and give the name of your personnel to which refer.
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Use a rugged packaging to ship the unit.
9.3 Fans
The thyristor unit with forced ventilation uses fans that rotate permanently when the unit is
supplied. In case of accidental fan failure, there is an over heating temperature on heatsink. 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 heatsink 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 these reason is important to control periodically the fan status checking
that is rotating.
9.4 Servicing
In order to have correct cooling, the user must clean the heatsink and the protective grill of fan.
The frequence of this servicing depends on environmental pollution.
Check periodically also if the screw for the power cables and safety earth are tightened correctly
9.5 Warranty conditions
We 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 includes products with serial numbers deleted. The faulty product should be
shipped to us at your cost and our Service will evaluate if product is under warranty terms.
Substituted parts remains our property.
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