Passive Alarms

If the red Alarm LED is blinking,the alarm is a passive alarm. The heater contin-

ues to operate, but this problem could prevent correct heating of your material.

Note that once the Acknowledge Alarm button is pressed once,the blinking red

LED becomes solid. A passive alarm will go away when the alarm condition is

cleared.

Problem
P1 Process Temperature
Deviation – The process tem-
perature exceeds the deviation
band as entered for the speci-
fied time. Default values are
10°F (6°C) for 5 sec.
Possible cause
One of the solid state relays (SSRs) has
failed.
The process RTD is loose or has fallen
out.
The air hose connections are loose.
The heater has failed.
Solution
Replace the failed solid state relays
(SSR).
Check the process RTD and tighten if
needed.
Tighten all air hose connections.
Replace the failed heating element (see
page 6-12).
6-8 l Troubleshooting