Multiplex MB-8-1 - Page 8

8 Part Number STH034 3/12
Troubleshooting
Control System . . . . . . . . . . . . . . . . . . . . 97
Will Not Run Diagnostics . . . . . . . . . . 97
Beverage System . . . . . . . . . . . . . . . . . . . 99
Procedure to Clear Blocked Line . . . . 99
Beverage System Diagnostics . . . . . . 102
Ice System . . . . . . . . . . . . . . . . . . . . . . . . 103
Before Beginning Service . . . . . . . . . . 103
Installation/Visual Inspection Checklist 103
Water System Checklist . . . . . . . . . . . 104
Ice Production/Quality Check . . . . . . . 105
Version 1 Ice Machine R404A Refrigerant
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Version 2 Ice Machine R290 Refrigerant
Electrical Troubleshooting Flowchart . 111
Refrigerated Cabinet . . . . . . . . . . . . . . . . 116
Reach-in temperature Out of Range - Check
Refrigeration System and Door Seal. . 120
High Product Temperature - Check Duct
Cooling Fan . . . . . . . . . . . . . . . . . . . . 120
Refrigeration System Diagnostics . . . . . 121
Analyzing Discharge Pressure or 
Temperature . . . . . . . . . . . . . . . . . . . . 121
Analyzing Suction Pressure or Temperature
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Analyzing Discharge Pressure or 
Temperature . . . . . . . . . . . . . . . . . . . . 125
Analyzing Suction Pressure or Temperature
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127