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Troubleshooting l 6-19
Checking or Replacing Temperature
Sensors
The D carousel dryer uses RTD sensors to monitor the temperatures of the drying
air, the return air, the regeneration exhaust, and the regeneration and process heater
boxes.
To check or replace an RTD sensors:
1 Disconnect and lockout the main power supply.
2 Remove dryer panels, as necessary.
3 Locate the RTD sensors.
4 Check the sensor positions and conditions. Temperature readings will be
incorrect, if the sensors are touching the wall of an air hose or pipe or if the sen-
sor or wiring is damaged. The tip of the sensor should be centered within the air
hose or pipe. Sensor wires should be attached to the appropriate connection
points on the dryer’s electrical enclosure or microprocessor board.
5 To check with ohm meter - measure the resistance across the RTDs. The
resistance should be approx. 110 ohm.
6 Replace the sensor, if necessary.
IMPORTANT
: Always refer
to the wiring diagrams
that came with your dryer
to locate specific electri-
cal components.
Illustrations in the User
Guide are intended to be
representative only.
Location of
the Process
RTD at the
Hopper
6
Troubleshooting