Koolaire KDT0300A Technician's Handbook page 100

3. Freeze time normal?
(Refer to Cycle Times/Refrigerant Pressures/24 Hour
Ice Production Charts).
A. Shorter freeze cycles?
Refer to head pressure control valve diagnostics.
B. Longer freeze cycles?
Refer to water system checklist, then refer to
Refrigeration Diagnostic Procedures.
4. Harvest time is longer than normal and control board
indicates safety limit #2?
(Refer to Cycle Times/Refrigerant Pressures/24 Hour
Ice Production Charts).
5. Discharge line temperature is greater than 160°F at
the end of the freeze cycle?
(Refer to Discharge Line Temperature Analysis)
6. Connect refrigeration manifold gauge set to the
access valves on the front of the ice machine.
Establish baseline by recording suction and discharge
pressure and freeze & harvest cycle times. (Refer
to "Freeze Cycle Refrigeration System Operational
Analysis Tables" for data collection detail).
7. Freeze cycle Head Pressure is in the range indicated in
the cycle time/24 hour ice production and operational
pressure chart?
If the head pressure is low refer to head pressure
control valve diagnostics.
8. Freeze cycle Suction Pressure normal?
Refer to analyzing suction pressure if suction pressure
is high or low.
9. Harvest cycle suction and discharge pressures are
lower than indicated in the cycle times/refrigerant
pressures/24 hour ice production chart?
Replace Harvest Pressure Regulating solenoid
100 Part Number STH063 9/17