202 Part Number STH025 11/16
HPR DIAGNOSTICS
Steps 1 through 5 can be quickly verified without
attaching a manifold gauge set or thermometer.
All questions must have a yes answer to continue the
diagnostic procedure.
1. Liquid line warm?
(Body temperature is normal)
If liquid line is cooler than body temperature, refer to
“Head Pressure Control Valve” on page 197.
2. Ice fill pattern normal?
Refer to “Ice Formation Pattern” on page 138.
3. Freeze time normal?
“Cycle Times/24-Hour Ice Production/ Refrigerant
Pressure Charts” on page 225
Shorter freeze cycles - Refer to “Head Pressure
Control Valve” on page 197.
Longer freeze cycles - Refer to “Water
System Checklist” on page 137 then refer to
“Troubleshooting By Symptom” on page 119.
4. Harvest time is longer than normal and control
board indicates safety limit #2?
“Cycle Times/24-Hour Ice Production/ Refrigerant
Pressure Charts” on page 225
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