Service Manual

28
I. Freeze-Up Check List
“MAKE COPIES AND USE AS NEEDED”
MODEL#_____________________SERIAL#_________________INSTALL DATE_____________FAIL DATE________________
Single Stack
1. Single unit or stacked equipment? [ ] [ ]
YES NO
2. Is the float switch dirty? [ ] [ ]
3. Is the water pump always running in freeze? [ ] [ ]
4. Is the thermistor properly mounted? [ ] [ ]
5. Is the TXV bulb tight and insulated? [ ] [ ]
6. Does the water sump fill to overflow in 60-90 [ ] [ ]
seconds or less when empty? Note: 1800, 2000
2400 should be 60-120 seconds
7. Is water line size 1/2”? If not________” [ ] [ ]
8. Is the water flow 3GPM for KM-150 to KM-900 [ ] [ ]
or 5GPM for KM-1200-KM-2400?
9. Only one water line per unit? If not_______ [ ] [ ]
11. Will the thermostatic bin control cycle the unit [ ] [ ]
OFF within 6-10 seconds when in contact with ice?
11a. Is the bin control capillary touching a heated [ ] [ ]
surface?
For units with mechanical style bin control:
12. Will mechanical control cycle unit off in 6 [ ] [ ]
seconds within the first 5 minutes of freeze?
12a. Is the deflector shield in place over the [ ] [ ]
control bracket.
12b. Is DIP switch number 7 ON? [ ] [ ]
12c. Is machine mounted on a dispenser? [ ] [ ]
13. Are the evaporator separators positioned [ ] [ ]
properly?
14. Is the cube guide positioned correctly? [ ] [ ]
15. Date evaporators were last cleaned? _____________________
16. Date water valve screen was last cleaned?________________
16a Does water valve close completely when [ ] [ ]
de-energized?
17. What is water pressure?___________Temperature__________
YES No
18. Does the unit have any water filtration? [ ] [ ]
If yes please list the following:
Filter brand___________________Model_________________
Filter pressure gauge reading during the fill cycle___________
Date filter was last replaced?___________________________
GPM or LPM flow rate of filter system?__________________
19. Please list the DIP switch settings.
1____2____3____4____5____6____7____8____9____10___
20. Is the cube size consistent form inlet to outlet [ ] [ ]
of evaporator?_
21. Is ice still dropping when the unit goes into freeze [ ] [ ]
22. After defrosting, was the unit leak checked? [ ] [ ]
Were any leaks found? [ ] [ ]
If so where?_________________________________________
23. Was any refrigerant added to the unit? [ ] [ ]
If so, how much?____________________________________
24.What was the head pressure? Freeze_________Harvest_______
(Freeze pressure should be taken 5 minutes into the cycle)
25. What was the suction pressure? Freeze______Harvest_______
(Freeze pressure should be taken 5 minutes into the cycle)
26. What was the length of the cycles?
Harvest_________________Freeze_________________
27. Ambient temperature at condenser? ____________________F
28. Water-cooled condenser outlet temperature______________F
29. Is the hot gas valve opening? [ ] [ ]
30. List model and manufacture of the bin____________________
_____________________________________________________
31. Has the stainless steel extension bracket been [ ] [ ]
added? (All “S” models)
32.What is the ice drop weight?____________________________
Note: Please make copies of this form and use it when diagnosing a freeze up condition.
Please submit a completed copy of the checklist with any Freeze-up labor claim form
PLEASE COMPLETE WHEN DIAGNOSING A FREEZE-UP
REFRIGERANT LEAK OR LOW CHARGE
TECHNICAL SUPPORT FAX [phone]