Manitowoc QF0400 Technician's Handbook page 129

Temperature Sensor Checklist
QF0400/QC0700/QF0800
Possible Problem List
Thermistor is not properly
insulated
Thermistor loose
Thermistor mounted in the
wrong location
Thermistor defective
Flooding expansion valve
Refrigerant overcharge or
undercharge
Low ambient temperature
Defective compressor
Insufficient or low water
pressure
Part Number 80-1230-9 10/10
Corrective Action List
Insulate thermistor.
Secure thermistor to
discharge line.
Position thermistor on
discharge line 6 in. from
compressor discharge port.
Refer to CHECK
PROCEDURE under
"Thermistor."
Replace expansion valve.
Recover and weigh in
nameplate charge.
Verify ambient temperature
remains above 45°F
(7.2°C).
Replace compressor.
Verify water pressure is
between 20 and 80 psig.
129