Troubleshooting
Before beginning . . . . . . . . . . . . . . . . . . . . 6-2
A few words of caution . . . . . . . . . . . . . . 6-3
DIAGNOSTICS
How to identify the cause of a problem . . . . 6-4
Shutdown alarms . . . . . . . . . . . . . . . . . . 6-5
Passive alarms . . . . . . . . . . . . . . . . . . . 6-12
Dewpoint troubleshooting . . . . . . . . . . . . . 6-21
Poor material drying troubleshooting . . . . . 6-22
REPAIR
Replacing fuses . . . . . . . . . . . . . . . . . . . . 6-27
Checking heater solid sta te relays . . . . . . . 6-28
Checking or replacing temperature sensors . 6-29
Replacing the heaters
Regeneration heater tube . . . . . . . . . . 6-30
Process heater tube . . . . . . . . . . . . . . 6-32
Replacing the desiccant wheel . . . . . . . . . . 6-34
S E C T I O N
6
6
Troubleshooting
Troublesho oti ng l 6-1
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