Multiplex MB-8-1 - Page 9

Part Number STH034 3/12 9
Component Check Procedures
Control System . . . . . . . . . . . . . . . . . . . . . 129
ON/Off Rocker Switch . . . . . . . . . . . . . 129
Power Relay . . . . . . . . . . . . . . . . . . . . 130
Transformer . . . . . . . . . . . . . . . . . . . . . 131
LCD Touchscreen & Control Board . . . 132
Beverage Components . . . . . . . . . . . . . . 133
Pressure Regulator - Water or CO2 . . 133
Water Dispense Solenoid Valve . . . . . 134
Syrup Solenoid Valve . . . . . . . . . . . . . 135
Product Pump . . . . . . . . . . . . . . . . . . . 136
Step Motor . . . . . . . . . . . . . . . . . . . . . . 137
Blender Motor . . . . . . . . . . . . . . . . . . . 138
Home Position Switch . . . . . . . . . . . . . 139
Door Switch . . . . . . . . . . . . . . . . . . . . . 140
Water Rinse Solenoid Valve . . . . . . . . 141
Ice Machine Components . . . . . . . . . . . . 142
Version 1 Ice Machine R404A Refrigerant -
Solid State Timer . . . . . . . . . . . . . . . . . 142
Version 1 Ice Machine R404A Refrigerant -
Solid State Time Delay Relay . . . . . . . 146
Version 1 Ice Machine R404A Refrigerant -
Float Switch/Water Control Relay . . . . 147
High Pressure Cutout (HPCO) Control 148
Infrared Ice Bin Control - All Models . . 149
Refrigerated Cabinet . . . . . . . . . . . . . . . . 150
Temperature Thermistor - Nozzle, Cabinet
or Defrost . . . . . . . . . . . . . . . . . . . . . . 150
Evaporator Fan Motor . . . . . . . . . . . . . 152
Chase Fan Motor . . . . . . . . . . . . . . . . 153
Condenser Fan Motor . . . . . . . . . . . . . 154
Compressor Electrical Diagnostics . . . . 155
The compressor does not start or will trip re-
peatedly on overload . . . . . . . . . . . . . . 155
Compressor Drawing Locked Rotor . . 156
Diagnosing Capacitors . . . . . . . . . . . . 156
Filter-Driers . . . . . . . . . . . . . . . . . . . . . . . . 157