VERDER CARBOLITE GERO ABA 7/35B, Installation, Operation And Maintenance Instructions, Page: 78 / 94

22.0 Repairs and Replacements
22.4 Solid-state Relay Replacement
Disconnect the product from the power supply and remove the
appropriate cover as given above.
Make a note of the wire connections to the solid state relay and disconnect them.
Remove the solid state relay from the base panel or aluminium plate.
Replace and reconnect the solid state relay ensuring that the bottom of it has good
thermal contact with the base panel or aluminium plate.
Replace the access panel.
22.5 Thermocouple Replacement
Disconnect the product from the power supply. Remove terminal cover 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
Disconnect the thermocouple from its terminal block and withdraw the thermocouple
from its sheath by bending the metal tag or releasing the screw to release. It is also
advisable to remove the sheath and shake out any broken pieces of thermocouple.
Re-assemble with a new thermocouple, observing the colour coding, ensuring that the
thermocouple is not twisted as it is being inserted and that the metal tag is bent back to
grip the sheath.
Refit the element access panel.
22.6 Element Replacement
If the elements should require replacement a complete insulation assembly or a new
insulated chamber will be supplied.
22.7 Door Plug Replacement
Contact Carbolite Gero Service Department should this need replacing.
22.8 Catch Tray Straightening
The stresses caused by repeated heating and cooling can cause the catch tray (see Fig
2.) to distort, allowing the catch tray to rock in use, giving an unstable balance reading.
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