Emerson AE8-1385 User Manual

Application Engineering

BULLETIN

Application Engineering

AE8-1385

for Copeland Scroll

BULLETIN

CoreSense

UltraTech® Air Conditioning Compressors

TABLE OF CONTENTS

Safety

Safety Instructions .................................................................2

Safety Icon Explanation ........................................................2

Instructions Pertaining to Risk of Electrical Shock, Fire,

or Injury to Persons ...............................................................3

Safety Statements .................................................................3

Introduction

Overview ...............................................................................4

Application Restrictions and Types .......................................4

Product Speciﬁ cations ........................................................... 4

Installation

Mounting ............................................................................... 4

Terminal Description ..............................................................4

Operation

Compressor Protection ......................................................... 4

Module LED Description .......................................................5

Module Operation/Code Description .....................................5

Resetting Alert Codes ...........................................................6

Service

Module History Download ..................................................... 6

Warranty Information ............................................................. 6

Support ..................................................................................6

Figures and Tables

Wires Pulled Through Module ............................................... 6

Module Dimensions in Millimeters ......................................... 7

Terminal Locations ................................................................ 7

Wiring Diagram ..................................................................... 8

Flash Code Description ......................................................... 9

LED Troubleshooting Information ...................................... 10-12

™

Diagnostics

AE8-1385

October 2011

AE8-1385

Application Engineering

BULLETIN

Safety Instructions

Copeland Scroll 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 to follow

these safety instructions.

Safety Icon Explanation

compressors with CoreSense™ Diagnostics technology are manufactured according to the latest

DANGER

DANGER indicates a hazardous situation which, if not avoided, will result in death or serious injury.

WARNING

CAUTION

NOTICE

CAUTION

WARNING indicates a hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION, used with the safety alert symbol, indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.

NOTICE is used to address practices not related to personal injury.

CAUTION, without the safety alert symbol, is used to address practices not related to personal injury.

Application Engineering

BULLETIN

Instructions Pertaining to Risk of Electrical Shock, Fire, or Injury to Persons

AE8-1385

WARNING

ELECTRICAL SHOCK HAZARD

• 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 HAZARD

• Failure to follow these warnings could result in serious personal injury.

• System contains refrigerant and oil under pressure.

• Remove refrigerant from both the high and low compressor side before removing compressor.

•

• Never install a system and leave it unattended when it has no charge, a holding charge, or with the service valves closed without electrically locking out the system.

• Use only approved refrigerants and refrigeration oils.

• Personal safety equipment must be used.

BURN HAZARD

• Failure to follow these warnings could result in serious personal injury or property damage.

• Do not touch the compressor until it has cooled down.

• Ensure that materials and wiring do not touch high temperature areas of the compressor.

• Use caution when brazing system commponents.

• Personal safety equipment must be used.

CAUTION

Safety Statements

• Refrigerant compressors must be employed only for their intended use.

• install, commission and maintain this equipment.

•

• All valid standards and codes for installing, servicing, and maintaining electrical and refrigeration equipment must be observed.

COMPRESSOR HANDLING

• Failure to follow these warnings could result in personal injury or

• Use the appropriate lifting devices to move compressors.

• Personal safety equipment must be used.

property damage.

AE8-1385

Application Engineering

BULLETIN

INTRODUCTION

Overview

CoreSense™ Diagnostics is a breakthrough innovation for troubleshooting residential air conditioning and heat pump systems. The CoreSense Diagnostics module is easily installed in the unit electrical panel near the compressor contactor. By using the compressor as a sensor, CoreSense Diagnostics helps the service technician more accurately troubleshoot system and compressor fault conditions.

CoreSense Diagnostics also provides compressor and system protection through its proprietary lockout feature. Depending on the severity and frequency of the fault that caused the trip condition, the CoreSense Diagnostics module can lockout the compressor contactor to prevent damage to the compressor and system components. Less severe fault conditions resulting in an occasional trip will not result in a lockout condition.

Flashing LEDs communicate ALERT and LOCK codes to the service technician.

Application Restrictions and Types

The CoreSense Diagnostics (571-0072-00) module is designed and qualiﬁ ed for use with ZPS*K5 single- phase Copeland Scroll® UltraTech™ compressors.

Product Speciﬁ cations

Operating Temp: - 40° to 150°F (- 40° to 65°C) Storage Temp: - 40° to 175°F (- 40° to 80°C) Supply Voltage: 18 to 28VAC , 48 to 62Hz Module Current Sensing Range: 2 to 30A Maximum Power Consumption: 2.5 VA (Excluding solenoid load)

Terminal Description

The terminals for the CoreSense Diagnostics module are ¼” spade terminals.

• COMMON (C)

The 24 volt common terminal for module power.

• DEMAND (Y)

The demand terminal requires a 24VAC signal measured with respect to the COMMON (C) terminal when there is a call for heating or cooling. A signal above 6VAC indicates the thermostat wants the compressor to be on, while 0-6VAC signal indicates the thermostat wants the compressor to be off.

• SECOND STAGE DEMAND (Y2)

The demand (Y) and second stage demand (Y2) terminals require a 24VAC signal measured with respect to the COMMON (C) terminal when there is a call for heating or cooling. A signal above 10VAC indicates the thermostat wants the Ultratech solenoid to be energized, while 0-10VAC signal indicates the thermostat wants the Ultratech solenoid to be deenergized.

• PROTECTION (PROT)

The protection terminal is internally connected to the COMMON terminal through a solid state switch.

• POWER (R)

The module requires a constant 24VAC supply power to this terminal. The module must receive an independent power supply in order to operate properly. See Figure 4.

INSTALLATION

Mounting

Four #8 or #10 self tapping or sheet metal screws are required for installation of the module. The maximum mounting screw torque is 20 in.lbs. Locate the module near the compressor contactor (wire routing for compressor run, common, and start wires will be easier in this position). The module can be mounted in any orientation and LEDs should be visible for ease of service.

The compressor’s run (R), common (C), and start (S) wires are routed through the holes in the CoreSense module marked “R”,”C”, and “S”. See Figure 1.

• Thermostat Communication (L)

Provides a 24V signal to an indoor thermostat indicating the number of ALERT ﬂ ashes displayed on the module. (Reference thermostat manual for available capability)

• Solenoid (DC SOL)

Provides a connection to the Copeland Scroll UltraTech second stage compressor solenoid. This solenoid is internal to the compressor, and has a voltage range of 18 to 28VDC. Please refer to bulletin AE-1311 for information on the Copeland Scroll® UltraTech® compressor.

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