Checking or Replacing Temperature
Sensors
The MDCW dryer uses RTD sensors to monitor the temperatures of the drying air,
the return air, the regeneration outlet, and the regeneration protection and setback
at the outlet heater of the hopper.
To check or replace RTD sensors:
1 Disconnect and lockout the main power supply.
2 Remove rear plastic cover, 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
sensor 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 at room temperature.
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 inlet.
Troublesho oti ng l 6-29
6
Troubleshooting
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