Elkhart Brass 70133000 Electric Valves - Manual (Page 25)

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- If the fuse is ok, replace the power card.
DC output voltage not available at terminals 33 and 34
- De-energize the main power supply and disconnect all wires from terminals 33 and 34.
- Energize the main power supply and check the voltage on terminals 33 and 34. The reading should be
between 23 and 27 VDC.
- If the voltage reading is correct, check the external wiring and the electrical load. It should not exceed
4W.
- If the voltage is not correct, replace the power card.
The actuator does not work using the remote controls
Check that:
- The wiring to terminals 32, 35, and 36 is correct.
- There is no short circuit between the wires.
- The electrical load does not exceed 4W.
- If an external source is used, the voltage must be 24-120 VAC 50/60Hz or 20-125 VDC.
The motor is very hot and does not start
- Wait until the motor cools down before trying to operate the actuator again.
- Check that the number of operations per hour and their duration is suitable for the actuator service (see
the nameplate).
- Check that the valve operating torque is within the range of the unit’s designed operating torque.
The motor runs but the actuator does not move the valve
- Verify that the drive insert correctly fits in the actuator base.
- Verify that the drive insert has enough engagement with the valve stem.
- Verify that the keyed connections for all keyways is correct.
- Use the actuator handwheel and ensure the valve will move. If not, proceed as follows:
- Loosen the handwheel retaining screw
- Remove the handwheel
- Check the internal parts
- Reassemble the handwheel to the actuator
The valve does not seat correctly
- For position seated applications, ensure the travel limits are set correctly.
- Confirm the torque required by the application and increase the actuator output torque setting if
necessary.
- The internal trim of the valve may be damaged.
Excessive torque for valve operation
- Clean, lubricate and check the valve stem.
- Valve packing too tight
- Check that the internal valve is well lubricated and not damaged
The actuator does not stop in fully open or fully closed position