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Tr o u b l e s h o o t i n g l
6-11
6
Tro
ub
le
sh
oo
tin
g
Problem
Process Heater Box High
Temperature
– The snap
switch in the process heater
tube opens due to excessive
temperature.
Heat Booster RTD Integrity
– If the process RTD is faulty,
it shuts down the dryer.
Process Blower Drive Fault
– If the process blower drive
has faulted, this alarm will
occur.,
Possible cause
There is an air flow blockage or loose
hoses.
The process blower is not running or
running in the wrong direction.
The isolation contactor failed in the
closed position.
The process heater output on the board
has failed.
The heater solid state relays (SSRs)
failed.
The process RTD connection to the con-
trol box is loose.
The connection in the electrical enclo-
sure for the process RTD is loose.
The connection of the RTD plug on the
control board is loose.
The process RTD has failed.
The control board has failed.
There is a fault at the drive unit.
Solution
Locate and remove any air flow restric-
tions.
Tighten any loose hoses.
Correct the cause of the non-running
blower (blown fuse, etc.) or reverse the
rotation of the blower.
Replace the isolation contactor.
Replace the board.
Replace the failed heater solid state
relays (SSRs).
Check the connection to the receptacle
and tighten if needed.
Check the RTD plug connection and
tighten if needed.
Check the plug connection and tighten if
needed.
Replace the process RTD.
Replace the control board.
Refer to your drive unit’s instruction
manual.
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 ...