Maintenance
Waukesha Cherry-Burrell
Page 34
95-03083
April 2008
Error Messages
Micro Switch
•
A mechanical switch using a lever arm and roller that
is compressed or released by stem movement.
•
AC/DC 24VDC or 110VAC
•
The position of the actuator stem is felt by a roller
Proximity Switch
•
IP67 sealed, inductive coil switch
•
AC/DC
•
The position of the actuator stem is detected by a sen-
sor at the target printed on the switch
Switch Adjustment
W-Series control tops with proximity switches or micro-
switches utilize a positive switching configuration to
provide discrete inputs for each valve position.
Lower Switch 1 is normally closed (NC) and passing
power when the stem is down. When the stem raises,
switch 1 opens and power is stopped.
Upper Switch 2 is normally open (NO) and does not pass
power when the stem is down. When the stem is fully
raised, Upper Switch 2 closes and passes power.
Proximity switches are supplied with incorporated LED’s
which light when power is passed and are inactive when
power is stopped.
1. Raise the stem to open, loosen the cap screws holding
the switch blocks (Figure 52, item A) with a 9/64"
allen wrench and slide the switches to set the distance
between the switches and the stem shaft at.040" (1
mm) (Figure 53).
If using a micro switch, place a.020" feeler gauge
between the roller and the small diameter of the stem.
Adjust the switch toward the stem until a “click” is
heard.
2. Hand-tighten the cap screws (Figure 52, item A) to
hold the switch position.
3. With the stem raised, adjust the vertical height of the
upper switch target to slightly below the stem
shoulder (Figure 53). Tighten the cap screws securely.
4. Lower the stem to close the valve and adjust the target
of the lower switch to slightly above the stem
shoulder (Figure 54). Tighten the cap screws securely.
NOTE:
Switches should detect stem movement within
1/16 inch (0.062 in/1.58 mm)
LED
Error Description
Measure
during
adjustment
close
Flashes at 8 Hz directly after leaving the programming mode
= adjustment error!
Taught position values are not within the detection range or
positions are not permissible or plausible
Error message can be
acknowledged by pressing the
position button
during
operation
close
Flashes at 8Hz = spindle head is at the edge or outside the
detection range or spindle head is in non defined zones
(white zones, see Figure 51 on page 33) for longer than 20
seconds
Check the position of the
valve
close
Flashes at 8Hz = fault in the electronics.
Unlike the other error messages, this error message cannot
be acknowledged or terminated.
Replace the sensor
Figure 52: Switch Adjustment
CAUTION:
Do not over-tighten.