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Applica Applica tion Enginee tion Enginee ring ring
AE8-1385
BULLE T IN
BULLE T IN
AE8-1385 October 2011
™
CoreSense Diagnostics
® ®
for Copeland Scroll UltraTech Air Conditioning Compressors
TABLE OF CONTENTS
Safety
Safety Instructions .................................................................2
Safety Icon Explanation ...............................................
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Application Engineering AE8-1385 BULLE T IN Safety Instructions ™ ® Copeland Scroll compressors with CoreSense Diagnostics technology are manufactured according to the latest U.S. and European Safety Standards. Particular emphasis has been placed on the user's safety. Safey icons are explained below and safety instructions applicable to the products in this bulletin are grouped on Page 3. These instructions should be retained throughout the lifetime of the compressor. You are strongly advised
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Application Engineering AE8-1385 BULLE T IN Instructions Pertaining to Risk of Electrical Shock, Fire, or Injury to Persons ELECTRICAL SHOCK HAZARD WARNING � Failure to follow these warnings could result in serious personal injury. � Disconnect and lock out power before servicing. � Discharge all capacitors before servicing. � Use compressor with grounded system only. � Molded electrical plug must be used when required. � Refer to original equipment wiring diagrams. � PRESSURIZED SYSTEM
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Application Engineering AE8-1385 BULLE T IN INTRODUCTION Terminal Description Overview The terminals for the CoreSense Diagnostics module ™ are ¼” spade terminals. CoreSense Diagnostics is a breakthrough innovation for troubleshooting residential air conditioning and heat • COMMON (C) pump systems. The CoreSense Diagnostics module The 24 volt common terminal for module power. is easily installed in the unit electrical panel near the compressor contactor. By using the compressor as a sens
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Application Engineering AE8-1385 BULLE T IN OPERATION Code 3 – Pressure Switch Cycling Compressor Protection The module will fl ash yellow three times when the compressor operates from 12 seconds to 15 minutes The CoreSense Diagnostics module utilizes proprietary followed by a trip condition lasting between 35 algorithms to protect the compressor and system from seconds to 7 minutes. When four consecutive or ten repeated trips of system pressure controls and the total Code 3 events are re
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Application Engineering AE8-1385 BULLE T IN software interface and USB connection, in order to off. This event will cause a lockout of the compressor download and store fault history and module operation and indicates that the module is mis-wired or the time. This information can be used to help diagnose contactor coil is shorted to ground. and review data from troubled systems in the fi eld. For NOTICE more information, please contact your Emerson Climate Application Engineer. Code 10 is
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Application Engineering AE8-1385 BULLE T IN 47 POWER Flash Event 1 Long Run Time 2 Compressor (Pressure) Trip 3 Pressure Switch Cycling 4 Locked Rotor R 5 Compressor (Mod Run) Trip 6 Open Start Circuit 7 Open Run Circuit 8 Welded Contactor 9 Low Voltage C Two Stage Control DC SOL operating range: 18-28VDC Compressor second stage is energized when Y & Y2 are 24VAC S Activ
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Application Engineering AE8-1385 BULLE T IN 2-Stage Indoor Outdoor CoreSense Thermostat Unit Unit Y2 Y2 Y2 Y2 Y1 Y1 Y1 Y High/Low Pressure Switch L L L L R R R R Compressor CC Contactor C C C C Prot DC Solenoid Solenoid Figure 4 Wiring Diagram 8 © 2011 Emerson Climate Technologies Printed in the U.S.A.
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Application Engineering AE8-1385 BULLE T IN Table 1 – Flash Code Description Lockout Alert Code Alert Condition Lockout Level Indication Normal Run Normal operation, no trip. N/A N/A Solid Green Long run time. Compressor is running for more than Code1 18 hours at full load. (Code1 is disabled in Heat Pump N/A N/A Yellow Flash 1 mode.) Compressor Pressure trip. Compressor runs for 12sec Code2 4x consecutive, to 15min followed by a compressor trip condition lasting Red: Flash 2 10x total
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Application Engineering AE8-1385 BULLE T IN Table 2 – CoreSense Diagnostics LED Troubleshooting Information Flash Code number corresponds to the number of LED fl ashes, followed by a pause and then repeated. TRIP and ALERT LEDs fl ashing at same time means control circuit voltage is too low for operation (brown-out conditions). Status Description Troubleshooting Information Module has power and Solid Green “RUN” Supply voltage is present at module terminals operating normally 1. Compressor pro
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Application Engineering AE8-1385 BULLE T IN Table 2 Continued 1. Run capacitor has failed 2. Low line voltage (contact utility if voltage at disconnect is low) • Check wiring connections Yellow “ALERT” Locked Rotor Flash Code 4 3. Excessive liquid refrigerant in compressor 4. Compressor bearings are seized • Measure compressor oil level 1. Evaporator blower is not running • Check blower relay coil and contacts • Check blower motor capacitor • Check blower motor for failure or block
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Application Engineering AE8-1385 BULLE T IN Table 2 Continued 1. Evaporator blower is not running • Check blower relay coil and contacts • Check blower motor capacitor • Check blower motor for failure or blockage Compressor (Moderate Run) • Check evaporator blower wiring and connectors Trip Red “LOCKOUT” • Check indoor blower control board Compressor is locked out Flash Code 5 after 4 consecutive or 10 total • Check thermostat wiring for open circuit Yellow Off compressor (moderate
