Blank Membrane Display

Symptom

The membrane meter display is not energized. The entire membrane is blank.

Fault

The fault could be a defective membrane switch assembly, a bad ribbon cable or connection, or a loss of power to the membrane.

Solution

1. Check to ensure power is available to the power supply and the breaker is turned on. (Item 3*)
2. Check the ribbon cable connections at the back of the membrane, the terminal block connections, and the connection on the control board. (Item 19*)
3. Verify the colored stripe on the ribbon cable is connected to pin 1 of the plug in connection.
4. Check the supply voltage to the membrane. With a DC voltmeter ensure +5 VDC is supplied to the membrane from the control board.(Item 2*) Connect the positive lead to the junction of R10 and C56. Connect the common lead to ground at TB1 pin 6.
   1. If the +5 VDC is present, replace the membrane and/or the ribbon cable. (Item 1* and Item 19*)
   2. If the +5 VDC is not present, check to verify 115 VAC is present at E1 and E2 on the control board. (Item 2*)
      1. If good, replace the driver control board. (Item 6*)
      2. If not present, check the control transformer (Item 9*) and the supply voltage to the power supply.
5. Contact Enercon's Service Department for assistance.

* The Component Layout Drawing for the Compak 2000 Power Supply comes in two power ranges, 1 to 3 kW and 4 to 10 kW. Please select the appropriate power range of the power supply used in your system.

• View the drawing for the 1 - 3 kW power supplies
• View the drawing for the 4 - 10 kW power supplies