Thermo Scientific Precision Premium PR305040G, Руководство по эксплуатации

Страница: 29 / 38

11. Check wiring connections against schematic, making sure that the line
power wire is attached to the proper terminal, i.e., 120V or 240V.
12. Check switch DS1 setting: If forced air, set switch A to ON, otherwise;
set to OFF for gravity. Switch B should always be OFF.
To replace a defective solid state relay, proceed as follows:
1. Disconnect power cord from the electrical outlet.
2. Open the chamber door. Carefully remove and retain hardware from
door hinges (case side). Set door aside.
3. Slide the oven forward until the front of the bezel (control panel) is at
least three inches from the edge of the bench top (or the oven feet are
at the edge of the bench).
4. Prop up the oven front by placing a shim under each front foot. Use
shims between 1½ and 2 inches in thickness.
5. Remove the screws securing bezel from bottom of oven.
6. Slide the oven back on the table plus a few inches (to set the bezel on
the bench) and rotate the bottom of the bezel out from the oven. The
top clips will come loose but the wiring will still be connected.
7. Carefully set the bezel on the bench.
8. Consult the schematic and locate the solid state relay (mounted on
bezel).
9. Remove four lead wires from their screw-down terminals.
10. Remove two Phillips screws which mount the solid state relay to the
bezel.
11. Lift out the solid state relay. Put new solid state relay in place, making
certain that the thin, conductive pad remains between the solid state
relay and the bezel.
12. Generally reverse the steps above to re-assemble oven.
6-8 Precision Premium Oven Thermo Scientific
Section 6
Service
Replacing the
Controller (continued)
Replacing the Solid
State Relay