3.0 R38 Controller
3.6
Over-Temperature Control (if fitted)
The over-temperature controller should typically be set at 15 °C above the main
controller. If an over-temperature condition occurs, check the main controller is
functioning correctly.
An over-temperature condition cuts off power to the heating elements. A light in the
over-temperature controller flashes. To reset this, refer to the over-temperature
control section of this manual.
3.7
Controller Replacement
If the over-temperature trip operates, a click occurs and a warning light near the
thermostat lights up; the reset button on the thermostat pops out. The reset button is
hidden behind the control dial. To reset the oven it is necessary to turn the thermostat
dial until the hole lines up with the reset button and press it using a small diameter rod.
3.8
Temperature Controller Replacement
Before handling the controller: wear an anti-static wrist strap or
otherwise avoid any possibility of damage to the unit by static electricity.
Refer to the detailed instructions supplied with the replacement
controller.
Disconnect the product from the electrical supply and remove the cover (see section
6.0).
Make a note of all the wiring connections before disconnecting the wires. Loosen the
screw that holds the controller body clamp in place. Use a flat screwdriver or similar
object to ease apart the two plastic lugs on the side of the clamp and pull the instrument
forward out of the front control panel.
Reconnect the wires according to the notes made – or see section 8.0 for wiring details.
Note:
If the product features an R38 over-temperature controller, then this should
be replaced using the same method described.
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