EarthLinked SCWD-024-1C, Quick Start Instructions

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SCWD-QS (12/16) Page 35
2) EPS Operation and Service
Reference Figure 20 for the EPS components in the compressor unit electric box.
Figure 20. Electric Box with EPS Components
With power ON , and viewing the EPS Module in the compressor unit electric box, the EPS green
light should be illuminated, indicating there is power to the EPS system.
If the green light is NOT illuminated, verify that 208/230 volt power is available to the EPS power
supply. Also check the fuse. Check and replace, as appropriate, the fuse for the EPS Power Supply
as shown in Figure 20. For service purposes, a spare fuse has been factory supplied and is located
in the electrical box. The replacement fuse is
Littlefuse 213 Series Slo-Blo
®
rated at 250 Volts, 2
Amperes, P/N 0213002MXP. This is also Allied Electronics Stock Number R1090710.
If 208/230 volt power is available and the fuse is intact, contact ETI technical support at 1-863-701-
0096.
If
there is an opening in the earth loop electrical circuit, the audible signal will be heard . After
shutting power OFF , all electrical connections from the EPS module to the earth loop system should
be checked and adjusted as appropriate to ensure good electrical contact.
NOTE : In extremely dry soil conditions (with low conductivity), the EPS system might not close the
alarm relay upon initial start-up or after an interruption in power. Resetting the alarm relay can be
done by quickly shorting the anode, positive to ground. It may be necessary to strip away part of the
anode wire insulation to do so.
If it is necessary to operate the heating and cooling system while the EPS is down for service, the
EPS power may be temporarily disengaged to eliminate the audible alarm, by removing the EPS/EDM
Fuse shown in Figure 20. Please note this step also de-energize the EDM system. Upon completion
of servicing the EPS, replace the fuse to energize the EPS and EDM systems and maintain warranty
coverage.
The EPS board is not field serviceable.