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Problem
Process Blower Drive Fault
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 {316°C} for
10 seconds.
Process Protection
Temperature Differential
- If
the difference between the
process temperature exiting
the process heater and the
temperature of the air entering
the hopper is greater than
175°F {97°C} for longer than
180 seconds it shuts down the
dryer.
Possible cause
The variable speed drive is not operat-
ing correctly.
The process RTD temperature probe is
not installed correctly.
The process blower is not running.
The air lines between the dryer and hop-
per are restricted or loose.
The dryer is too far from the hopper.
The process hose is not insulated.
The air lines between the dryer and hop-
per are restricted or loose.
The dryer is located too far away from
the hopper.
The process RTD is loose or has fallen
out.
The process blower is not running.
The process hose is not insulated.
Solution
See ABB Variable Frequency Drive
Manual.
Make sure the RTD temperature probe
tip is in the center of the hopper inlet
tube.
Correct the cause of the non-functioning
blower.
Straighten any crimps in the hoses.
Tighten any loose hoses.
Move the dryer closer to the hopper and
shorten the hoses.
Insulated hose is required for high dry-
ing temperatures.
Check for air flow blockages or loose
hoses between the outlet of the dryer and
the inlet of the hopper. Straighten any
crimps in the hoses. Tighten any loose
hoses.
The dryer and the hopper should not be
located more than 10 feet {3 m} apart.
Check the process RTD and tighten if
needed.
Correct the cause of the non-functioning
blower.
Insulated hose is required for high dry-
ing temperatures.
6-12
l Tr o u b l e s h o o t i n g
Shutdown Alarms
If an alarm occurs, a red dialog box is displayed on the dryer’s touch screen
control. The dryer will shut down automatically during a to prevent damage
to the equipment or personnel. The dialog box will indicate whether the
alarm is a shut down alarm or a passive alarm.
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 ...