Heatcraft Refrigeration Products II Beacon II Troubleshooting Guide

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Diagnostics

Beacon II Troubleshooting Guide

PROBLEM Step ACTION ITEM IF OK IF NOT OK

1. Check Primary Power Supply Disconnect 1. Check fuses and circuit breakers

2. Check Voltage to Evaporator Transformer Go to 2. Check field wiring for breaks

LED is not lit. 3. Check Transformer Secondary Output Volts next step 3. Replace if necessary

4. Check Voltage at Control Board (24V and C) 4. Check factory wiring and connections

5. Replace Control Board

1. Check Compressor internal overloads 1. Wait for reset

2. Check Control Power to Condensing Unit 2. Check transformer voltage (secondary and

LED shows

Coo

, but (24 Volts across “COMP” and “C” at board) Go to primary) and wiring of 208V power taps.

compressor will not run. 3. Check Compressor Contactor Coil Voltage next step 3. Check internal condensing unit wiring

4. Check Compressor Contactor “pulled in” 4. Replace as needed

ERROR CODES:

E1

Room Sensor Check Sensor and Board Connection Replace as needed

E2

Defrost Sensor Check Sensor and Board Connection Replace as needed

E3

Suction Sensor Check Sensor and Board Connection Replace as needed

E4

Suction Transducer Check Transducer and Board Connection Replace as needed

E5 Outdoor Sensor Check Sensor, wiring and Board Connection Replace or remove

1. Check Refrigerant Type 1. Compare board setpoint and refrigerant

2. Check coil for ice 2. Defrost coil and check defrost cycle

settings/setpoints, defrost sensor and

heater amps.

E6

Low Superheat 3. Check Control Board step position from board LED 3. Replace board if EEV steps not at 2.

During Cooling 4. Check Electric Expansion Valve Closure Go to 4. Pumpdown system see if LPS opens or if it

(0°F for 2 minutes) next step times out (EEV is bad or LPS is set

incorrectly, if times out) – See Pumpdown.

5. Compressor Not Operating 5. Check overloads and contactor.

6. Check Suction Temperature Sensor 6. Compare board sensor reading against

actual suction line temperature.

7. Check Suction Pressure Transducer 7. Compare pressure reading against gauges.

Contents

Main TABLE of CONTENTS INSTALLATION & OPERATING INSTRUCTIONS MCCU Condensing Units General Safety Information General Safety Information Inspection Condensing Unit Specifications Figure 1. Evaporator Specifications Figure 2. Heatcraft Refrigeration Products., 2002. Table 2. Evaporator Specification Data Figure 3. Evaporator Placement Figure 3. Evaporator Placement In Cooler/Freezer 1H Typical Layouts for Illustration 1H Condensing Unit Placement Space and Location Requirements Figure 4. Condensing Unit Placement Condensing Unit Rigging Figure 5. Condensing Unit Rigging Refrigeration Piping And Line Sizing Refrigeration Piping And Line Sizing Figure 6. Refrigeration Piping Diagrams Figure 8. Drain Line Suction Lines Figure 7. Suction P-traps Suction Line Risers Condensate Drain Lines Figure 10. Line Insulation Figure 9. Example of Pipe Support Roof Penetrations Head Pressure Controls Figure 11. Piping Connection Layout (MCCU)****** Leak Detection And Evacuation Leak Testing Evacuation Field Wiring Table 3. Fan Cycling Relay Figure 12. Field Wiring Figure 13. Beacon II Board Installation Tips Condensing Unit Evaporator Unit CAUTION Refrigerant Line Brazing ( ) Power Supply This must be done for all the evaporators on that system. Initial Power On MORE BOX TEMPERATURE Figure 14. Operating Mode Display Programming And Reviewing Settings/Changes SELECT PROGRAM REVIEW ITEMS ELE Air Page Default: Electric defrost is +5 F and air defrost is +50 F and air defrost is +30 Default: Electric defrost is -15 MONITOR FORCE DEFROST RESET TIME FORCE SERVICE Status LED Display Description CLEAR / TEST Status LED Display Description Low Ambient Operation Pumpdown Service Mode Defrost dFS Alarms Clearing Alarms Error Indicator LED Evaporator Fans Shut Off Power Failures SPt Spare Sensor Terminals Checking Sensors System Defaults Figure 15. Control Sensor And Piping Table 5. System Defaults Parameters Code Air Electric Checking Operation Of Expansion Valve (EEV) ESP Expansion Valve FORCE SERVICE SCP Refrigeration Charging Refrigeration Charging Check-Out & Start-Up Operational Checkout System Balancing Page CONDENSING UNIT UNIT COOLERS Beacon II Troubleshooting Guide Coo E6 E4 E3 E7 E9 SEr Parts Table 6. Beacon II Parts List Table 8. Unit Cooler HRP Parts Table 7. Condensing Unit HRP Parts Page Page Page Page Page Wiring Diagram Diagram 1. Ice Machine Fan Cycle Wiring Start-up Checklist Date of Start-up ELECTRICAL PIPING DRAIN LINES Start-up Checklist RECORD