Pressure Transducer - Henny Penny Evolution Elite EEG-142 Technical Manual

6-22. PRESSURE
TRANSDUCER
Expansion Chamber
Clean-out Plugs
Nov. 2009
This component controls the AIF filter pump by sensing the
pressure in the expansion chamber.
Voltage range is 0.5 to 4.5 VDC, corresponding to a pressure
range of 0 to 30 PSIG
A messured pressure below -1.5 PSI or above 32 PSI may
indicate a failed transducer, it has become disconnected, or a
clogged expansion chamber.
To view the the pressure, press ◄ ► at the same time and
"*INFO* *MODE*" shows in the display, followed by
"1. E-LOG". Press ► until "15. AIF" shows in the display.
Press ▼ until "PRESSURE SENSOR" shows in the left dis-
play. Press X button to show pressure in PSI.
An over-pressure issue can also indicate a return valve failing
to open, instead of a faulty transducer or a clogged chamber.
In case of a clogged expansion chamber, remove the clean-
out plugs at each end of the chamber to clean the obstructions
inside the chamber. Photo at left.
Extra long fill times or oil bubbling at the end of an AIF cycle
may be signs of a clogged expansion chamber or faulty trans-
ducer.
Replacement:
To avoid electrical shock or property damage, move the
power switch to OFF and disconnect main circuit
breaker, or unplug cord at wall receptacle.
1. Remove the left side panel.
2. Pull-out on the clip, while pushing up on the wire harness
connector, at the top of the tranducer, to remove wires.
3. Using a 1-1/16" wrench, remove the tranducer from the
expansion chamber.
4. Using pipe thread sealant, install new tranducer in reverse
order and restore power to the unit.
6-24
Model EEG-142, 143, 144