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roubleshooting l
6-7
Shut Down Alarms (continued)
Problem
A49 Process Protection
High Temperature – If the
process protection temperature
exceeds the process protection
high temperature setpoint, it
shuts down the dryer. Defaults
are set to 600°F (315.6°C) for
10 sec. for larger HTCs and
400°F (204.4°C) for 10 sec.
for smaller HTCs.
A50 Process Protection
Differential Temperature – If
the process protection differen-
tial temperature exceeds the
process protection differential
temperature setpoint, it shuts
down the dryer. Defaults are
set to 175°F (325°C) for
180 sec. (see screen 21, page
4-12).
Possible cause
The Process RTD temperature probe is
not installed correctly.
The air lines are restricted or loose.
The Process RTD or Process Protection
RTD temperature probe is not installed
correctly.
The air lines are restricted or loose.
Solution
Make sure the RTD temperature probe
tip is in the center of the hopper inlet
tube or heater manifold.
Straighten any crimps in the hoses.
Tighten any loose hoses.
Make sure the RTD temperature probe
tip is in the heater outlet (see page 3-10).
Straighten any crimps in the hoses.
Tighten any loose hoses.
6
Troubleshooting