Troubleshooting
Waukesha Cherry-Burrell
Page 44
95-03083
April 2008
PROBLEM
POSSIBLE CAUSE
SUGGESTED ACTION
Electrical
Set & Forget, continued
No Valve “Open” signal
Upper switch not adjusted properly
Adjust switch.
Erratic switch alarms
Control failure
Check control wiring and power source.
Loose hardware
Check Set & Forget Sensor mounting and
proper assembly of indicator stem and
target.
Proximity or Micro Switches
No Valve “Closed” or “Open”
indication LED or signal
No Power
Check power connections.
No Output Triggered
Check proper assembly of indicator stem
and switch’s position.
Opposite “Closed” or “Open”
Indication LED or signal
NO and NC switches in wrong
position
Check and confirm NO switch is Upper and
NC switch is Lower.
Erratic Switch Alarms
Switch not properly adjusted
Adjust switch. Condition often result of
tight gap setting or adjustment too close to
trigger point of stem.
Loose wiring
Confirm wiring terminations.
Hydraulic shock in valve
Check that hydraulic shock or other factor
is not actually moving stem. Switch could
be correct.
Loss of Switch Adjustment
Switch not properly adjusted
Adjust switch.
Switch hardware not snugged
sufficiently against vibration level
Snug switch hardware.
Loose switch bracket
Tighten bracket mount.
Loose Control Top
Tighten Control Top setscrews.
As-i and/or DeviceNet Cards
No Indicator LED on card
No Power
Check power connections.
Wrong wiring
Confirm proper wiring.
Bad card
Replace card.
Flickering Indicator LED
on card
Communication error
Check and confirm proper wiring.
Confirm no wiring strands are shorted
between terminals.
Consult Controls Engineer.
Bad Card
Replace card.