Low Pressure Cutout (Lpco) Control - Manitowoc QuietQube Series Technician's Handbook

LOW PRESSURE CUTOUT (LPCO) CONTROL

FUNCTION
Supplies or interrupts power to the compressor time delay
when suction pressure rises above or falls below setpoint.
The LPCO control is closed at pressures above setpoint and
opens at pressures below setpoint.
R404A
R410A
CHECK PROCEDURE
Opening the LPCO will initiate the 5 minute compressor
time delay relay. Repeated 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.
LPCO Setpoint
Above Cut-In
Below Cut-Out
152
Specifications
Cut-Out
12 psig ±3
20 psig ±3
Reading Should Be
0 Volts
Line Voltage
Part Number: 000015431 Rev01 5/19
Cut-In
35 psig ±5
50 psig ±5
LPCO Contact Position
Closed
Open