
© 3M 2006
17
Repair Procedures
Heater Check-Out
Caution
Disconnect air and electrical power and make sure
applicator is at room temperature before servicing
3M™ Scotch-Weld™ Hot Melt Applicator PG II LT.
Failure to disconnect air and electrical power before
servicing may cause electrical shock or damage to the
applicator.
!
Use Volt/Ohm Meter to check electrical continuity of
each heater. If continuity exists, heater is okay. First
remove heat shield. Heaters need not be removed from
the block. Check in the following sequence: left front,
right front, right rear, left rear. To start the check,
remove only one wire from its connection on the
terminal strip.
Place one probe from the meter on the connector of the
wire that has been removed, and with the other probe,
touch the matching connector on opposite side of the
applicator. If needle on Volt/Ohm Meter swings, heater
is okay.
Reconnect wire that was removed first, and continue
sequence. If one or more heaters are burned out, refer
to Repair Procedure, pages 13 through 19.