Flowserve 75 Series DeviceNet Interface - Manual (Page 6)

6 DeviceNet Interface for Series 75 Electric Valve Actuator FCD WCAIM2068-00
6.4 Motor, Cam and Switch
Troubleshooting
1. Remove power from the actuator at terminals 1 and 2.
2. Remove the red and black wires from terminals 3 and 4, and
tape these wires. (This isolates the DeviceNet Board from the
circuit.)
3. Apply power to the actuator at terminals 1 and 2.
4. Using a jumper wire connect terminal 2 to terminal 3. The
actuator should rotate in the CCW direction until it is stopped by
switch 2. If switch 2 is tripped, remove the jumper from terminal
3 and connect from terminal 2 to terminal 4. The actuator should
rotate in the CW direction. When rotating the actuator, check to
see that the cams trip the switches per settings in Section 6.3. If
the cams are set properly, the switches are not tripped, and the
actuator does not rotate in either direction when commanded, the
motor/gearbox housing is defective and requires replacement.
a CAUTION: Do not jumper 3 and 4 to terminal 2 simulta-
neously. Jumper one terminal at a time.
5. If the actuator rotates in both directions and stops at the 0°
and 90° positions, remove power from the actuator, reconnect
the red and black wires to terminals 3 and 4, and proceed to
Section 6.5.
6.5 DeviceNet Board Troubleshooting
Check to make sure that:
1. The board is wired correctly per Figures 3 and 4.
2. The correct voltage is supplied to terminals 1 and 2.
3. The DeviceNet bus is properly terminated with a 120 ohm resis-
tor between CanL and CanH.
4. The proper communication baud rate and MACID (address) have
been selected.
5. The correct voltage is supplied to the DeviceNet bus (24 VDC).
6. LED 1 is on steady green and LED 2 is flashing green. If LED 2 is
red, then there is an address conflict (two nodes have the same
address).
7. LED 3 is on red (indicating CW position) or that LED 5 is green
(indicating CCW position). If none of the LEDs are on and 24
VDC can be measured at terminal strip P3 terminals 1(-) and
5(+), the board is defective and requires replacing.
8. If the LEDs are, on per Steps 6 and 7:
When a CCW command is given to the DeviceNet board from
the Processor/Controller, LEDs 2, 4 and 6 should go on steady,
and the actuator should rotate in a CCW direction. When a CW
command is given to the DeviceNet board, LED 2 should go on
steady, and the actuator should rotate in a CW direction.
If the actuator does not respond to either command, and after
verifying that the Controlling Processor/PLC is configured prop-
erly, the board is defective and requires replacing.
6.6 Limit Switches 1 and 2
If both switches 1 and 2 are actuated simultaneously, the unit will
not operate.
6.7 Capacitor
The AC motors are operated with a capacitor. If the capacitor is
defective, it will prevent the motor from starting and/or running.
Replace if necessary.
6.8 Motor
If one of the motor windings is open or short-circuited, the unit will
not operate. If motor is hot, allow it to cool down so that the stator
is at room temperature. Apply voltage to motor. If motor still fails to
operate, replace the entire motor module.
6.9 Gear Train
Remove the motor module from the actuator. Rotate the motor by
hand. Spinning the motor shaft should rotate the module output
pinion. If module output pinion fails to rotate, replace the entire
motor module. Also, check the bull gear for missing or broken teeth.
Replace if necessary.
6.10 Valve
The problem may lie with the valve instead of with the actuator.
Check the operation of the valve by removing the actuator and oper-
ating the valve by hand.
7 Spare Parts
The following are recommended spare parts that should be kept on
hand for Series 75 electric actuators:
1 Limit Switch Kit
1 Capacitor (AC Units only)
When ordering spare parts, please specify actuator size, voltage and
cycle time.