Flowserve Worcester Controls Electri-SAFE DataFlo - Manual (Page 22)

22 Electri-SAFE DataFlo Digital Electronic Positioner FCD WCAIM2048-01
Flow Control
Worcester Controls
the actuator pump/motor does not start, place a jumper
across the two wired terminals on switch 1. If the
pump/motor starts, quickly remove the jumper and determine
if the switch is out of calibration or defective. Replace
defective switch and/or calibrate switch operation per
paragraph 4.2.1. If the motor still does not start, check for an
open motor winding, and check for a shorted capacitor. If the
problem with the pump/motor still cannot be determined,
return the unit to the factory. If the pump/motor functions
properly in the CCW direction, remove jumper probes from
terminals 8 and 1 (keep power applied to terminals 7 and 8)
and proceed to check the CW rotation function.
Check For CW Rotation: Operation of the positioner/control
solenoid.
Be careful, power has to be continuously applied to terminals
7 and 8 for this step.
With the actuator in the full CCW position, remove jumper
probes from 8 to 1 and place and hold the jumper probes
from 8 to 2. The positioner/control solenoid should energize
and the actuator should turn in the CW direction and stop in
the full-closed position. If the actuator does not rotate in the
CW direction, the positioner solenoid coil may be defective
and requires a continuity test per paragraph 7.4.4.
7.4.4 Positioner/Control Solenoid Valve Coil Continuity Test
With power off, disconnect the lead going to the
positioner/control solenoid coil at terminal 2 and measure
resistance with an ohmmeter connected to this lead and
terminal 7. The meter should indicate between 125–150
ohms. If the meter reads infinite (open) the coil is defective
and needs replacing per paragraph 7.4.5.
7.4.5 Positioner/Control Solenoid Valve Coil Replacement
Refer to figure 8 in the appendix.
CAUTION: Electrical power must be removed from the unit
before working on replacement of the solenoid coil. There
is a risk of electrical shock.
a) Remove the pump end cover and gasket.
b) Remove the nut holding the solenoid coil onto the valve.
c) On the limit switch end, disconnect the two black
solenoid wires from terminal strip locations 2 and 7.
NOTE: When removing the solenoid, attach a chase string
or wire to the coil wires as you pull the coil wires through
the actuator. You can cut the solenoid coil wires from the
coil end and use them as a pull through as well. This will
allow feeding the new coil wires along the side of the
pump motor subassembly.
d) Remove the solenoid coil from the valve subassembly.
e) Pull the new solenoid coil wires through the enclosure
tube using the chase string or wire.
f) Install the new coil onto the valve subassembly.
g) Install the nut to hold the coil onto the valve
subassembly.
h) Reconnect the two new black solenoid coil wires to the
terminal strip at locations 2 and 7. Refer to figure 6 in
the appendix.
i) Install the cover gasket and cover. Tighten the cover
screws to make a weather-tight seal between the cover
and the pump end casting.
7.4.6 Fail-safe Solenoid Valve – Function and Continuity Test
(Troubleshooting chart step 7)
The fail-safe normally closed solenoid valve is continuously
energized (an open) as long as power is applied to the actuator.
Check the operation of the fail-safe valve while calibrating per
paragraph 4.2.1. When a command is given to the actuator to
go in the CCW direction and the CCW LED on and the power
supply is on and the motor/pump can be heard running and the
actuator does not move, the fail-safe valve coil has probably
failed and de-energized. With power off, disconnect the lead
going to the fail-safe solenoid coil at terminal 8 and measure
resistance with an ohmmeter connected to this lead and
terminal 7. The meter should indicate between 100–175 ohms.
If the meter reads infinite (open) the coil is defective and needs
replacing per paragraph 7.4.7.
7.4.7 Fail-safe Solenoid Valve Coil Replacement
(Troubleshooting chart step 8)
Refer to figure 8 in the appendix.
CAUTION: Electrical power must be removed from the unit
before working on replacement of the solenoid coil. There
is a risk of electrical shock.
a) Remove the pump end cover and gasket.
b) Remove the 5 /
8
" nut and spring washer holding the
solenoid coil onto the valve.
c) On the limit switch end, disconnect the two black
solenoid wires from terminal strip locations 7 and 8.
NOTE: When removing the solenoid, attach a chase string
or wire to the coil wires as you pull the coil wires through
the actuator. You can cut the solenoid coil wires from the
coil end and use them as a pull through as well. This will
allow feeding the new coil wires along the side of the
pump motor subassembly.
d) Remove the solenoid coil from the valve subassembly.
e) Pull the new solenoid coil wires through the enclosure
tube using the chase string or wire.
f) Install the new coil onto the valve subassembly.
g) Install the spring washer and the 5 /
8
" nut to hold the coil
onto the valve subassembly.
h) Reconnect the two new black solenoid coil wires to the
terminal strip at locations 7 and 8. Refer to figure 6 in the
appendix.
i) Install the cover gasket and cover. Tighten the cover
screws to make a weather tight seal between the cover
and the pump end casting.