Manitowoc QuietQube SD0672C Technician's Handbook page 148

Operational Analysis
Evaporator Outlet
Temperature Comparison
Attach and insulate temperature
probes between evaporator
outlet and 90° elbow
Harvest Valve
A leaking harvest valve gives an
audible indication before ice fill
pattern or machine performance
is affected
Final Analysis
Enter total number of boxes
checked in each column.
Quad Expansion Valve – S3070C
1
Evaporator outlet
temperatures are
10°F of each other
within 10°F of each
other
Within 10°F of each
other and above 32°F
Audible flow
of refrigerant through of refrigerant through
any harvest valve
during the freeze cycle during the freeze cycle
Harvest Valve Leaking
2
Evaporator outlet
temperatures are
Evaporator outlet
NOT within
temperatures are
or
10°F of each other
No Audible flow No Audible flow
of refrigerant through
any harvest valve any harvest valve
during the freeze cycle
Refrigerant
Low On Charge
Overcharge
-Or-
TXV Starving
TXV Flooding
3
Evaporator outlet
temperatures are
NOT within within 10°F of each
No Audible flow
of refrigerant through
any harvest valve
during the freeze cycle
Compressor
or
4
other