SCWD-QS (12/16) Page 363) Voltage VerificationIf it is necessary to verify the voltage output of the EPS system, it can be checked with a digital DCvoltmeter. The correct electrical voltage is listed in Figure 21.State of system Voltage OutputUnloaded(Anode or Ground disconnected, alarm sounding) 20-30 V DCFigure 21. EPS Voltage RatingsTo check the voltage unloaded, disconnect the Anode plug from the back of the Compressor Unit.The EPS alarm will be heard. While the alarm is sounding, use one end of the voltmeter probe intothe EPS socket, and put the other voltmeter probe in contact with either the earth loop liquid or thevapor line. Make sure the probe is in contact with the copper, with no insulation in the way. As analternative you can also use the service valve. See Figure 22. Reconnect the Anode, alarm shouldstop ringing.NOTE: In extremely dry soil conditions (with low conductivity), the EPS system might not close thealarm relay upon initial start-up or after an interruption in power. Resetting the alarm relay can bedone by quickly shorting the anode, positive to ground. It may be necessary to strip away part of theanode wire insulation to do so.Figure 22. Typical Test for DC VoltageIMPORTANT!DO NOT troubleshoot the EPS board! If the above steps do not resolve theproblem, call ETI for technical service assistance at 1-863-701-0096.
