N1500i FACS Manual
54
Part No. 729-110-053 V.1.03
© 2018 Nelson Stud Welding, Inc. All rights reserved.
5.2 Routine Maintenance
1. Remove the machine wrap-around top cover after
disconnecting input connector.
2. Keeping the machine clean will result in cooler operation and
higher reliability. Be sure to clean the following areas. See
Section 6 for component locations.
•Power and control printed circuit boards
•Power switch
•Input rectifier
•Heat sink fins
•Output terminals
3. Examine capacitors for leakage or oozing. Replace boards if
needed.
4. Examine the sheet metal case for dents or breakage. Repair
the case as required. Keep the case in good condition to
ensure that high voltage parts are protected and correct
spacing is maintained. All external sheet metal screws must be
in place to assure case strength and electrical ground
continuity.
5. Replace machine cover and screws.
When PCB connectors are disconnected, please use a silicone-
free electrical grade grease (Nygogel 760G from Nye Lubricants)
to all PCB connectors prior to reconnecting. This forms a
corrosion\moisture barrier that will protect the contacts for
reliable operation.
Warning!
Prior to starting any maintenance work, the welding unit must be
switched off, disconnected from the input power and secured against
restart.
Only a qualified electrician should perform any work inside the unit’s
case. Any work done should be made in accordance with all local and
national electrical codes. Failure to do so may result in bodily injury
or death.
Warning!