SCZF1 SSR Power Controller
Troubleshooting
Rev 2
Ametek HDR Power Systems
11
e. If possible, perform printed circuit board maintenance at a work station that has a conductive
covering which is grounded through a 1-megohm resistor. If a conductive table top is unavailable,
a clean steel or aluminum table top is an excellent substitute.
f. Keep plastic, vinyl, Styrofoam or other non-conductive materials away from printed circuit boards.
They are good static generators that do not give up their charge easily.
g. Return goods to Ametek HDR Power Systems in static-safe packaging. This will limit further
component damage from ESD.
h. CAUTION. Do not touch any printed circuit board unless you are wearing a ground wrist strap, as
circuit damage may occur. Grounding kits are also available commercially and can be purchased
through most electronic wholesalers.
4.4 Environmental
Problems
Check to see that none of the following environmental problems exist.
Inadequate Cooling.
Allow at least 1 inch of air space (in any direction) between the heat sinks and
any item or structure near the SCZF1 power modules. Heat sink fins should be free of dust or dirt for
proper heat transfer, and free of obstructions which could prevent proper airflow.
Contamination.
The unit should be periodically cleaned of all dust and dirt. However, certain kinds of
dust or particles are particularly conductive. A small accumulation of conductive material can cause
component failures from arc-over or complete shorts.
High Ambient Temperature.
Lack of a proper ambient-temperature check before installation, or an
increase in ambient temperature, can result in numerous problems. Check the ambient temperature
under existing conditions. If it is 122 ºF (50 ºC) or lower, ambient temperature should not be a
problem. If it is above 122 ºF (50 ºC), steps should be taken to provide more cooling, or the SCZF1
should be moved to a cooler location, or call the Ametek HDR Power Systems
service department.
Excessive Vibration.
A significant degree of pitched or unpitched vibration can cause numerous
problems. If vibration is isolated as a probable cause of improper operation, standard vibration-
isolation mounting techniques should be employed.
4.5
Input Power and Load Connections
Turn off the power to the SCZF1 and check all power connections, input and output, to make sure they
are mechanically secure and free of corrosion. Make the same checks at the power source and load.
Visually check insulation on input and load wiring for evidence of damage or overheating.
