Service Manual

154 Part Number: 000015431 Rev 02 6/20
HIGH PRESSURE CUTOUT (HPCO) CONTROL
FUNCTION
Stops the ice machine if subjected to excessive high-side
pressure. The HPCO control is normally closed, and opens
on a rise in discharge pressure.
SPECIFICATIONS
Specifications
Cut-Out Cut-In
R404A 450 psig ±7
(3102 kPa ±48
31 bar ±0.48)
300 psig ±10
(2068 kPa ±69
20.68 bar ±0.69)
R410A 600 psig ±10
(3147 kPa ±69)
450 psig ±10
(3103 kPa ±69)
Automatic Reset
Opening the HPCO will initiate the 5 minute compressor
time delay. Repeated HPCO opening/closing or failure to
close will result in an E01 long freeze error.
CHECK PROCEDURE
1. Connect manifold gauges to ice machine.
2. Hook voltmeter in parallel across the fan cycle control,
leaving wires attached.
3. Refer to chart below.
HPCO Setpoint Reading Should Be HPCO Contact Position
Below Cut-Out 0 Volts Closed
Above Cut-In Line Voltage Open