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Troubleshooting
Before beginning. . . . . . . . . . . . . . . . . . . . 6-2
A few words of caution . . . . . . . . . . . . . . 6-3
DIAGNOSTICS
How to identify the cause of a problem . . . . 6-4
Shut down alarms . . . . . . . . . . . . . . . . . . 6-5
Passive alarms . . . . . . . . . . . . . . . . . . . . 6-8
REP
AIR
Replacing fuses . . . . . . . . . . . . . . . . . . . . 6-9
Checking heater solid state relays . . . . . . . 6-10
Checking or replacing temperature
sensors . . . . . . . . . . . . . . . . . . . . . . 6-11
Replacing the heating elements . . . . . . . . 6-12
Replacing the air flow differential
pressure switch
. . . . . . . . . . . . . . . . . 6-14
SECTION
6
6
Troubleshooting
T
roubleshooting l
6-1