Removing The Epc Control Assy - ABB PGC5000 Series Service Instructions Manual

PGC5000
PGC5000 Series Service Instructions
Be sure that the EPC Control Assembly has cooled to ambient temperature (approximately one hour)
before proceeding.
Use an ESD wrist strap and proper grounding procedures before handling any components in the EPC
Control Assembly.
1. On the Background screen, press the F1 (Exit to Commands) soft key.
2. On the Commands screen, cursor to ANALYSIS CONTROL, if necessary, and press the F2 (Start/Stop Analysis) soft key.
3. On the Start/Stop Analysis screen, cursor to End of Analysis? and press the F2 (Stop Analyzer) soft key. The analyzer will
stop at the end of the analysis.
4. Remove power from the analyzer and ensure that power to the analyzer remains removed throughout the EPC repair
process.
5. If an extended turn-off is necessary:
a. Turn off sample supply and burner fuel.
b. Allow analyzer to cool to ambient temperature.
c. Turn off remaining flows at their sources and plug all vents.
6.6.2 Removing the epc control assembly
This procedure is not required if you are only replacing EPC components.
1. Perform the "Preparation" procedure.
2. Remove the four screws holding the top panel on the front of the oven.
3. Remove the top plate of the oven.
4. Remove the ten screws holding the EPC Control Assembly and cover, and remove the cover; retain the screws for later use.
5. Using a right-angle wrench, remove the two screws holding the EPC Control Assembly in place.
6. Remove the three fittings from the back of the EPC Control Assembly.
7. Open the front door of the oven.
8. Remove the three fittings from the bottom of the EPC Control Assembly.
9. Open the left side door of the Class B Oven or the top left side door of the Class C Oven.
9. Open the Controller front door to gain access to the backplane board.
SI/PGC5000-EN, rev B
6 Component repair
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