The power switch is ON, but the power LED is off

The power switch is set to ON (I), but the Power ON Light Emitting Diode (LED) is off. The voltage to the control circuits is not sufficient, or a power component has a short circuit.

Voltage to the system is missing or incorrect

  1. Make sure that the power cord is connected correctly to the power outlet or line-disconnect switch box.
  2. Make sure that the power is on at the main power panel or at the line-disconnect switch box.
  3. Make sure that the circuit breaker did not open (trip).
  4. Make sure that the line voltage is not too low (more than 15% below the rated voltage).

The power switch or power PCB is defective

Do Troubleshooting for input voltage faults to do a check of the incoming voltage, the power switch, and the power Printed Circuit Board (PCB).

The solenoid valve is defective

Do Troubleshooting for solenoid valve pressure sensor faults (2-11-n).

The fan is defective

  1. Set the power switch to OFF (O), and disconnect the power cord from the power source.
  2. Remove the plasma power supply handle and cover.
  3. Remove the component barrier.
  4. Clean the fan assembly.
  5. Make sure that the J7 fan connector is fully connected to the power PCB.
  6. Make sure that the fan wires are not pinched and do not have damage.
  7. Remove the fan and fan shroud from the plasma power supply.
  8. Use pin 1 (red) and pin 4 (black) on the J7 fan connector, and connect the fan to an external 12 V or 24 V power source.
    The image shows the pins on the fan connector to connect to a power source.
  9. Does the fan operate correctly when it is connected to an external power source? OptionDescription
    If yes... Replace the power PCB.
    If no... Replace the fan.