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6-16
l Tr o u b l e s h o o t i n g
Problem
Regeneration Temperature
Deviation
– The regeneration
temperature exceeds the
deviation band for the speci-
fied time. Default values are
10°F {6°C} for 5 seconds.
Regeneration Outlet After
the Wheel RTD Integrity
-
The control can not sense the
regeneration outlet RTD.
Return Air Mid-High
Temperature
– If the return
air temperature is between 150
and 180°F {66 and 82°C}.
Possible cause
One of the solid state relays (SSRs)
failed.
The regeneration RTD is loose or has
fallen out.
The air hose connections are loose.
The output on the board has failed.
Defective regeneration heater.
There is a loose connection in the
wiring leading to the RTD.
The connection of the RTD plug on the
control board is loose.
The regeneration outlet RTD has failed.
The control board has failed.
The hopper does not contain enough
material.
You are drying at a high drying
temperature above 120°F {49°C} or run-
ning at low throughputs.
The aftercooler/intercooler does not have
enough water.
The aftercooler/intercooler coils are
dirty.
Solution
Replace the failed solid state relays
(SSRs).
Check the regeneration RTD and tighten
if needed.
Tighten all air hose connections.
Replace the board.
Check the heater fuses and resistance
across each leg of the regeneration
heater.
Check the RTD plug connection and
make any necessary repairs.
Check the plug connection and tighten
if needed.
Replace the regeneration outlet RTD.
Replace the control board.
Make sure your material supply system
is working properly.
Ensure water flow to the aftercooler/
intercooler.
Turn on the water supply, or fix any
leaks or blockages.
Clean the aftercooler/intercooler coils.
See Maintenance section entitled,
Cleaning the aftercooler/intercooler
coils.
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 ...