Control panel - HT models. Remove the screws holding the panel. Note that the panel
remains connected by wiring. Do not disconnect any wiring without first making a
careful note of all the connections.
Internal element cover. Open the door, remove any screws holding the panel and any
clips holding thermocouples in position and remove the cover.
8.4
Temperature Controller Replacement
Refer to the controller instructions for more information on how to replace the
temperature controller.
8.5
Solid-State Relay Replacement
Disconnect the product from the power supply and remove the
appropriate cover as given above.
1. Make a note of the wire connections to the solid state relay, then disconnect them.
2. Remove the solid state relay from the base panel or aluminium plate.
3. Replace and reconnect the solid state relay ensuring that the bottom of it has
good thermal contact with the base panel or aluminium plate.
4. Replace the access panel.
8.6
Thermocouple Replacement
Disconnect the product from the power supply. Remove the appropriate
panel to gain access to the thermocouple connections. Make a note of the
thermocouple connections.
Thermocouple cable colour codings are:
Thermocouple Leg
Colour
positive (type K)
green
negative
white
1. Disconnect the thermocouple to be replaced from its terminal block and withdraw
it.
2. Re-assemble the new thermocouple, observing the colour coding.
3. Refit the element access panel.
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