10 Part Number: 000016427 Rev 00 08/2020
Table of Contents (continued)
Operational Checks PKU0155................................................... 32
Siphon System PKU0155 ....................................................... 32
Water Level PKU0155 ........................................................... 32
Water Level Check PKU0155................................................. 33
Ice Thickness Check PKU0155............................................... 33
Minimum/Maximum Slab Weight PKU0155......................... 34
Troubleshooting
PKM0335/PKM0425/PKM0535 Models
Control Board Test Mode .........................................................35
Diagnosing an Ice Machine that Will Not Run ..........................36
Ice Machine Does Not Cycle Into Harvest when the Harvest
Float Is Down/Closed............................................................... 36
Ice Machine Cycles Into Harvest Before the Harvest Float Is
Down/Closed........................................................................... 38
Ice Production Check ............................................................... 39
Installation/Visual Inspection Checklist ................................... 40
Water System Checklist ........................................................... 41
Ice Formation Pattern.............................................................. 42
Safety Limits............................................................................43
Safety Limit 1 ........................................................................ 43
Safety Limit 2 ........................................................................ 43
Safety Limit 3 ........................................................................ 44
Safety Limit Checklist............................................................ 45
Analyzing Discharge Pressure ..................................................48
Discharge Pressure High Checklist ........................................ 49
Freeze Cycle Discharge Pressure Low Checklist .................... 49
Analyzing Suction Pressure .....................................................50
Suction Pressure High Checklist............................................ 52
Suction Pressure Low Checklist............................................. 52
Harvest Valve ..........................................................................53
Harvest Valve Analysis .......................................................... 54
Comparing Evaporator Inlet/Outlet Temperatures ................... 56
Discharge Line Temperature Analysis .......................................57
Refrigeration Component Diagnostics......................................58
Procedure ............................................................................. 58
Final Analysis ........................................................................ 59
Refrigeration Component Diagnostic Chart .............................. 60
