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Profitec Pro 500: Replacing the Power Switch

If your Pro 500 isn't getting power, if the green light isn't staying on, or if you have to hold the power switch to get the machine to power on—it most likely needs to be replaced. These instructions apple to any similar Profitec or ECM machine.

Tools Needed:
- 2.5mm Allen wrench or hex driver
- 3.0mm Allen wrench or hex driver
- Channel lock pliers or similar
- Masking tape
- Replacement power switch


NOTE: The machine must be unplugged and cool to the touch before beginning.

1. Start by removing the panels from the machine.

2. Identify the retaining collar on the power switch at the front of the machine.
Pro500_replace_power_switch_01

3. Use your fingers to unscrew the power switch retaining collar.
Pro500_replace_power_switch_02 

4. If the collar is too tight to unscrew by hand, apply masking tape to the machine around the power switch to protect the chrome finish, then use a pair of pliers to unscrew the retaining collar.
Pro500_replace_power_switch_03
Pro500_replace_power_switch_04
NOTE: A special tool is available fo unscrew the retaining collar, but it is not 100% necessary if you work patiently and carefully.

5. Identify the rear of the switch inside the machine.
Pro500_replace_power_switch_06

6. Pull the switch straight back to remove it from the machine.
Pro500_replace_power_switch_09
Pro500_replace_power_switch_07

7. Take note of the orientation of the wires and their color as installed on the switch.
Pro500_replace_power_switch_10
Pro500_replace_power_switch_11
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8. Unplug the wires from the back of the faulty switch and move them to the new switch.
Pro500_replace_power_switch_17

9. Make sure to install the wires on the new switch in the correct orientation. The white and black wires need to be on top when the toggle switch is in the "ON" position.
ECM_Profitec_power_switch_01
Wire Colors
Black: Brings power into the machine.
White: Neutral out of the machine. (The insulation on this wire has a tendency to discolor, it can appear pink, tan, or even brown.)
Brown: The machine's powered wires.
Blue: The machine's neutral wires.

The Switch
This power switch is a Double Pole Single Throw (DPST) type switch. That means it's actually two switches in one. The two halves of the switch are separated by the central divider. On one side, the switch opens and closes the circuit between the black wire and the brown wire(s), allowing power to enter the machine when the switch is in the ON position. On the other side, the switch performs the same function between the white and blue wires, allowing power to exit the machine in the ON position.
Pro500_replace_power_switch_13
See the images in Step 7 for reference when re-installing.

10. You can now push the toggle part of the switch through the hole in the machine's front panel. Follow steps 1-4 in reverse order to install the switch in to the machine.
Pro500_replace_power_switch_09

Don't forget to test the new switch before putting the panels back on the machine!