Koolaire KDT0300A Technician's Handbook page 10

Maintenance
Interior Cleaning and Sanitizing . . . . . . . . . . . . . . . . . 35
General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Cleaning and Sanitizing Procedure . . . . . . . . .35
Toggle Switch Operation. . . . . . . . . . . . . . . . . .36
Remove Parts for Cleaning . . . . . . . . . . . . . . . .40
Preventative Maintenance Cleaning . . . . . . . . . . . . 42
Ice Machine Inspection . . . . . . . . . . . . . . . . . . . . . . . . . 43
Cleaning the Condenser . . . . . . . . . . . . . . . . . . . . . . . . 44
Removal from Service/Winterization . . . . . . . . . . . . 45
Air-cooled Models . . . . . . . . . . . . . . . . . . . . . . .45
Water-cooled Models . . . . . . . . . . . . . . . . . . . .45
Troubleshooting
Control Board Test Mode . . . . . . . . . . . . . . . . . . . . . . . 47
Diagnosing an Ice Machine that Will Not Run . . . 48
Ice Machine Does Not Cycle Into Harvest when
Water Loses Contact with the Harvest Float Switch
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Ice Machine Cycles Into Harvest Before Water Loses
Contact with the Harvest Float Switch . . . . . . . . . . 51
Ice Production Check . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Installation/Visual Inspection Checklist . . . . . . . . . 53
Water System Checklist . . . . . . . . . . . . . . . . . . . . . . . . . 54
Ice Formation Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Safety Limits. . . . . . . . . . . . . . . . . . . . . . . . . . . .58
Analyzing Discharge Pressure . . . . . . . . . . . . . . . . . . 65
Analyzing Suction Pressure . . . . . . . . . . . . . . . . . . . . . 67
Harvest Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Comparing Evaporator Inlet/Outlet Temperatures . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Discharge Line Temperature Analysis . . . . . . . . . . . . 76
Refrigeration Component Diagnostics . . . . . . . . . . . 78
Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79
Final Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . .80
Refrigeration Component Diagnostic Chart . . . . . . 81
10 Part Number STH063 9/17