29
No maintenance is required for the heating elements other than
replacement when one burns out. Note that with low temperature
operations, the lifetime of the heating element is in excess of 100,000
hours. It is only at temperatures in the 900°C to 1000°C range that the
expected lifetime begins to shorten. Also, the heating elements do not
degrade in any way over time. Should failure occur, it will be sudden
and catastrophic.
4.1.3.19.Chamber, Self Clean
The chamber should require no maintenance. If a problem with the
chamber is suspected, an RTC field service engineer should be
consulted. Because the process gas is forced through the insulation, the
gas flow away from the insulation prevents contamination from building
up on the chamber walls. If flux residue cleaning is necessary because
of buildup elsewhere in the chamber, the zones can be set at 450°C and
the oven can be put into a self-cleaning cycle for about an hour to burn
out these organic residues.
4.2.
Troubleshooting
To troubleshoot, follow all suggestions sequentially to determine cause of problem.
4.2.1.
Unable to log on, the OPTO22 control system does not have any power
A) Check fuse “FB” in safety enclosure box. (Ref: Power Control Schematic in
Documentation Section)
B) Check the Ethernet cable between the PC and the OPTO22 controller at the
back of the PC and at the controller. See figure below. (Ref: Frame Wiring
Schematic in Documentation Section)
C) Check the setup of the installed Ethernet card. (Ref: Engineering Specification
00042 in Appendix B.
4.2.2.
Temperature
4.2.2.1.The furnace has been in "warmup" mode for more than 15 minutes.
On the Process screen, the zone temperature does not change. Perform
the following procedures sequentially to determine cause.
A) Check K1 main contactor (located in safety enclosure) to be sure it is
operational. If not, check fuse “FD”. (Ref: Power Control
Schematic in Documentation Section)
Summary of Contents for 2115150301
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