Manitowoc Marine Q 1000, Service Technician'S Handbook

Page: 84 / 179

–74–
Water System Checklist
A water-related problem often causes the same
symptoms as a refrigeration system component
malfunction.
Example: A water dump valve leaking during the
Freeze cycle, a system low on charge, and a starving
TXV have similar symptoms.
Water system problems must be identified and
eliminated prior to replacing refrigeration components.
Possible Problem List
•
Corrective Action List
Water area (evaporator) is dirty
•
Clean as needed
Water inlet pressure not between 20 and 80 psig
•
Install a water regulator valve or increase the water
pressure
Incoming water temperature is not between 35°F
(1.7°C) and 90°F (32.2°C)
•
If too hot, check the hot water line check valves in
other store equipment
Water filtration is plugged (if used)
•
Install a new water filter
Water dump valve leaking during the Freeze cycle
•
Clean/replace dump valve as needed
Vent tube is not installed on water outlet drain
•
See Installation Instructions
Hoses, fittings, etc., are leaking water
•
Repair/replace as needed
Water fill valve is stuck open or closed
•
Clean/replace as needed
Water is spraying out of the sump trough area
•
Stop the water spray
Uneven water flow across the evaporator
•
Clean the ice machine
Water is freezing behind the evaporator
•
Correct the water flow
Plastic extrusions and gaskets are not secured to
the evaporator
•
Remount/replace as needed