Tr o u b l e s h o o t i n g l
6-27
6
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Passive Alarms
If an alarm occurs, a red dialog box is displayed on the dryer’s touch screen
control. The dryer continues to operate, but this problem could prevent cor-
rect drying of your material. The dialog box will indicate whether the alarm
is a shut down alarm or a passive alarm.
Problem
Drying Monitor High
Temperature (T1-T6) -
One
or more RTD probes located
at positions T1 through T6 on
the drying monitor are above
the maximum temperature set-
point.
Drying Monitor Low
Temperature (T1-T6) -
One
or more RTD probes located
at positions T1 through T6 on
the drying monitor are above
the maximum temperature set-
point.
Possible cause
Material throughput is too low.
Material level in the hopper is above the
selected High Temperature Alarm RTD.
Process air is not at the proper drying
temperature.
The process temperature setpoint and the
DM-II setpoints are not the same.
Too much air flow to the hopper.
Material throughput is too high.
Material level in the hopper is below the
selected High Temperature Alarm RTD.
Process air is not at the proper drying
temperature.
The process temperature setpoint and the
DM-II setpoints are not the same.
Poor air flow to the hopper.
Solution
Ensure the material usage is within the
rated capacity of the dryer and hopper in
the system.
Check your material supply system for
receiver problems, material availability,
etc.
Reduce the process air temperature
entering the hopper.
Determine which setpoint is incorrect
and adjust as needed.
Reduce the amount of air flow into the
hopper.
Ensure the material usage is within the
rated capacity of the dryer and hopper in
the system.
Check your material supply system for
receiver problems, material availability,
etc.
Check for process deviation or loop
break alarms on the dryer control, cor-
rect drying temperature.
Determine which setpoint is incorrect
and adjust as needed.
Clean or replace the all filters in the
process air stream.
Verify if the preocess blow is operating
properly, including rotation.
Straighten crimps or remove any debris
that may restrict air flow through hoses
and turbes
Summary of Contents for HTC 120
Page 10: ...viii l Table of Contents ...
Page 30: ...2 14 l Description ...
Page 35: ...Installation General Installation General l 3 5 3 I n s t a l l a t i o n ...
Page 65: ...Installation Hard Piping Kits Installation Piping Hoses l 3 35 3 I n s t a l l a t i o n ...
Page 80: ...3 50 l Installation Piping Hoses ...
Page 88: ...3 58 l Installation Piping Hoses ...
Page 92: ...3 62 l Installation Conveying Lines ...
Page 93: ...Installation Water Lines 3 I n s t a l l a t i o n Installation Water Lines l 3 63 ...
Page 124: ...3 94 l Installation Gas Piping and Exhaust Flue ...
Page 125: ...Installation Testing 3 I n s t a l l a t i o n Installation Testing l 3 95 ...
Page 250: ...4 108 l Operation ...
Page 286: ...5 36 l Maintenance ...