Return to Table of Contents Table of Contents Page 1
Back Bar Service Manual
Table of Contents
1.0 GENERAL INFORMATION ................................................................................ 1-1
Use of Service Manual .................................................................................... 1-1
Model Families ............................................................................................... 1-1
2.0 SAFETY INFORMATION ................................................................................... 2-1
Refrigerant HFC-134a ..................................................................................... 2-1
Potential Problems with HFC-134a ................................................................... 2-1
Service Manual Safety Labels .......................................................................... 2-1
3.0 TROUBLESHOOTING GUIDE – REFRIGERATION SYSTEM................................ 3-1
4.0 TROUBLESHOOTING GUIDE – ELECTRICAL SYSTEM ...................................... 4-1
5.0 TROUBLESHOOTING GUIDE – DOORS, DRAWERS AND SHELVING ................ 5-1
6.0 REFRIGERATION SYSTEM REPAIR INSTRUCTIONS ....................................... 6-1
Air Inltration ................................................................................................. 6-1
Slide Out the Refrigeration Deck ...................................................................... 6-2
Plumbing for Remote Drain ............................................................................. 6-2
System Operating Pressures ............................................................................ 6-3
6.4.1 First Time Pull Down ........................................................................................6-3
6.4.2 Normal Cycling.................................................................................................6-3
6.4.3 Stabilization ...................................................................................................6-3
6.4.4 Service Values ................................................................................................6-3
De-Ice Blocked Evaporator Coil – Self-Contained Models .................................... 6-4
Air Flow Obstructions ...................................................................................... 6-5
Clean Condenser Coil ...................................................................................... 6-5
Ambient Temperature ..................................................................................... 6-5
Compressors and Condensing Unit ................................................................. 6-6
Replace Condenser Fan Motor ....................................................................... 6-7
Replace Evaporator Fan Motor – Self-Contained Models ................................... 6-7
Replace Compressor ..................................................................................... 6-8
Leak Detection ............................................................................................. 6-8
Recharge Procedure ...................................................................................... 6-8
Replace compressor starting device – Self-contained models ............................ 6-9
6.18 Troubleshooting Guide – Refrigeration System: Variable Speed Compressor...... 6-10
16.18.1 Compressor/Inverter Test Procedures............................................................ 6-10
16.18.2 Compressor Diagnostic................................................................................. 6-10
16.18.3 Inverter Diagnostic...................................................................................... 6-11
16.18.4 Variable Speed Compressor Change.............................................................. 6-11
16.18.5 Troubleshooting After Compressor Replacement............................................. 6-11
7.0 ELECTRICAL SYSTEM REPAIR INSTRUCTIONS................................................ 7-1
Electrical Specications ................................................................................... 7-1
Wiring Diagrams ............................................................................................. 7-2
Load Operation Modes .................................................................................... 7-23
Electronic Controller ........................................................................................ 7-23
