Troubleshooting l 6-1
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 . . . . . . . . . . . . . . . . . . . . . . 6-7
Passive alarms . . . . . . . . . . . . . . . . . . . . . . . 6-11
Additional alarms . . . . . . . . . . . . . . . . . . . . . . 6-14
Dewpoint troubleshooting . . . . . . . . . . . . . . . . . 6-16
Poor material drying troubleshooting . . . . . . . . . 6-17
REPAIR
Replacing fuses . . . . . . . . . . . . . . . . . . . . . . . 6-34
Checking heater solid state relays . . . . . . . . . . . 6-35
Checking or replacing temperature sensors . . . . . 6-36
Replacing the regeneration heater . . . . . . . . . . . 6-37
Replacing the desiccant wheel
assembly . . . . . . . . . . . . . . . . . . . . . . . . . 6-43
Replacing the desiccant wheel
motor . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-45
6
SECTION
6
Troubleshooting