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6-14
l Tr o u b l e s h o o t i n g
Problem
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 seconds.
Process Low Temperature
–
The process temperature is
less than the low temperature
setpoint for the specified time.
Default values are 70°F
{21°C} for 20 seconds.
Possible cause
One of the solid state relays (SSRs)
failed in the closed position.
Defective process heater.
The output on the board has failed.
The process RTD is loose or has fallen
out.
The air hose connections are loose.
Precooler water is too cold, or the water
flow rate is too high.
The output on the board has failed.
Flow control solenoid is stuck open.
The process RTD is loose or has fallen
out.
Process heater has failed.
Solution
Replace the failed solid state relays
(SSRs).
Check the heater fuses and resistance
across each leg of the process heater.
Replace the board.
Check the process RTD and tighten if
needed.
Tighten all air hose connections.
Check water temperature and flow set-
tings. Adjust as necessary.
Replace the board.
Replace the valve.
Check the process RTD and tighten if
needed.
Check the heater fuses and resistance
across each leg of the process heater.
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 ...