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Tr o u b l e s h o o t i n g l
6-15
Problem
Process dew point
– The dew
point has not fallen below the
setpoint. If the dew point goes
below the setpoint for 180 sec-
onds the alarm should go away.
NOTE:
The alarm is not
active for the first 5 min-
utes.
DC Filter Clogged
– The
optional dust collector’s differ-
ential pressure switch is
tripped.
Process Air Flow High
Process Air Flow Low
Possible cause
Defective dew point sensor.
The hose or wiring connections to the
sensor block are loose or have fallen off.
Poor regeneration air flow.
The desiccant wheel may be contaminat-
ed.
Desiccant wheel not turning.
Leaks in the process air stream.
Power Purge blower not running.
The optional dust collector’s filter is
clogged.
Process air flow setpoint is above the
alarm setpoint.
Process air flow setpoint is below the
alarm setpoint.
Solution
Replace the sensor.
Check wiring and hose connections to
the sensor, resecure if needed.
Remove the air flow restrictions, dirty
filters, etc.
Check the desiccant for contamination,
replace if needed. Install plasticizer /
volatile trap for severe situations.
Replace the desiccant wheel.
See
Troubleshooting section entitled,
Replacing the desiccant wheel
.
See Troubleshooting section entitled,
Passive alarms, Wheel rotation alarm.
Check for worn or loose hoses.
Check fuses, wiring or replace blower.
Remove and clean or replace the process
air filter.
Decrease the CFM of the dryer.
Increase the CFM of the dryer.
✐
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.
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 ...