CD Automation REVO CL 1PH User Manual page 47

CD Automation srl
23 Maintenance
In order to have a corrected cooling, the user must clean the heat-sink and the protective grill of the
fans. The frequency of this servicing depends on environmental pollution.
Also check periodically if the screw for the power cables and safety earth are tightened correctly
(See Connection Diagram)
23.1 Trouble Shooting
Small problems sometimes can be solved locally with the help of the below tab of trouble shooting.
If you don't succeed, contact us or your nearest distributor.
Indication on
Symptom
front unit
Green LED (ON)
Load current
doesn't flow
Green LED (ON)
Load current flow
Red LED (SC)
also without input
signal
Yellow LED (HB)
Current flows at
nominal value but
Yellow LED
(HB/SC) is light
on Red LED (SC)
Thyristor unit
doesn't work
properly
23.2 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.
CD-Eng-REVO-CL-1PH-35-40A-Thyristors-Units
Possible reasons of the
 No Auxiliary Voltage
 No input signal
 Reversed polarities of input
light OFF
signal
 Fuse failure
 Load connection interruption
 Load failure: The yellow led (HB)
light ON is light on (with HB option)
 Thyristor fault: The red led (SC)
is light on (with HB option)
 Wrong wiring
light on  SCR short circuit
light on
 HB circuit not tuned
or
 Current transformers not
properly wired
light on
 Auxiliary voltage supply out of
limits
 Wrong input signal selection.
 Wrong input signal calibration
(out of range)
REVO CL
symptom
47
Actions
 Give auxiliary voltage supply
Connection Diagram
(See
 Provide to give input signal
 Reverse the input signal polarity
 Change the fuse
 Check the wiring
 Check the load
 Change the thyristor module
 Check the wiring
 Change the thyristor module
 Make HB calibration procedure
 Check current transformers
wiring
 Verify the auxiliary voltage
supply
 Control input signal setting.
 Check input setting
User's Manual
)