PSD-QS (02/16)
Page 31
2) EPS Operation and Service
Reference Figure 21 for the EPS components in the compressor unit electric box.
Figure 21. 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
yellow light
is illuminated,
there is an opening
in the earth loop electrical circuit. The audible
signal will also 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.
If the
red light
is illuminated,
there is a short
in the earth loop electrical circuit. The audible signal
will be heard. Check and correct all wiring and connection as appropriate from the EPS module to the
earth loop to ensure they are not shorting.
If
none of the lights
are illuminated, check and replace, as appropriate, the fuse for the EPS Power
Supply as shown in Figure 21. 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 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 Fuse
shown in Figure 21. Upon completion of servicing the EPS, replace the fuse to energize the EPS
system and maintain warranty coverage.
IMPORTANT!
DO NOT troubleshoot the EPS power supply or EPS module! If the above
steps do not resolve the problem, call ETI for technical service assistance at 1-
863-701-0096.
Summary of Contents for Prime-025
Page 15: ...PSD QS 02 16 Page 15 Figure 8 PSD Compressor Unit Electrical Schematic 230 1 60...
Page 16: ...PSD QS 02 16 Page 16 Figure 9 PSD Compressor Unit Electrical Schematic 230 3 60...
Page 17: ...PSD QS 02 16 Page 17 Figure 10 PSD Air Heating Cooling Water Heating Application...
Page 18: ...PSD QS 02 16 Page 18 Figure 11 PSD Air Heating CoolingWater Heating Field Wiring Diagram...
Page 20: ...PSD QS 02 16 Page 20 Figure 11a SureStart Mode of Operation...
Page 27: ...PSD QS 02 16 Page 27 Figure 15 Disassembled Plug Connector...
Page 34: ...PSD QS 02 16 Page 34 Figure 24 PSD Internal Flow Schematic...
Page 35: ...PSD QS 02 16 Page 35 Figure 25 PSD Piping...
Page 37: ...PSD QS 02 16 Page 37 Figure 26 Evacuation of PSD System...
Page 39: ...PSD QS 02 16 Page 39 Figure 27 Initial Charge of PSD System...
Page 41: ...PSD QS 02 16 Page 41 Figure 28 Final Charge of PSD System...
Page 44: ...PSD QS 02 16 Page 44 Figure 32 Start Up Process...
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