Vollrath SU444 Water Cooled - Manual (Page 32)

Owner’s Manual #513684 26 SU444I2 Model Machines
5.4 TROUBLESHOOTING - MIX PUMP
PROBLEM POSSIBLE CAUSE REMEDY
Pump motor does
not run.
1 Power to pump is off. 1 Supply power to pump.
2 Low voltage. 2 Check for low voltage.
3 Mix pump hose jammed inside black
cover/clamp. 3 Disconnect pump from power source. Remove
four cover/clamp thumb screws. Separate
cover/clamp halves and remove outer half.
Remove jammed hose. Clean and re-install
cover/clamp and tighten four thumb screws
securely. Allow motor thermal overload to
reset.
4 Pump motor overloaded. 4 Allow internal thermal overload to reset;
determine overload cause and repair.
5 Pressure switch on pump is defective. 5 Check mechanical operation and continuity of
pressure switch.
6 Defective motor/capacitor. 6 Check motor amperage draw and/or capacitor.
Replace motor or capacitor.
Pump operates but
cylinder will not fi ll.
Note 1: A properly working pump will fi ll an 8 oz. cup with mix in about 9 seconds.
Note 2: Immediately after a bag change the pump may be unable to reestablish it’s prime
with the system at operating pressure. In this case, turn the pump off. Draw 2-3 pints to
reduce system pressure to zero. Turn pump on. Purge remaining air in mix bag and pick-up
hose.
Important: before connecting the pick-up hose to the mix bag, remove as much air
from the mix bag as possible.
1 Out of Mix. 1 Replenish mix supply.
2 Mix pump hose kinked inside black
cover/clamp. 2 Disconnect pump from power source. Remove
four cover/clamp thumb screws. Separate
cover/clamp halves and remove outer half.
Remove jammed hose. Clean and re-install
cover/clamp and tighten four thumb screws
securely. Allow motor thermal overload to
reset.
3 Hoses assembled incorrectly. 3 Refer to diagram for correct hose connections.
4 Mix pump hose service life is
exceeded. 4 Reposition/replace mix pump hose. See
Section 4
5 Mix pump hose not connected to
machine. 5 Connect mix pump hose to machine.
6 Ice crystals in mix. 6 Completely thaw mix prior to use.
7 Mix bag drawn against adapter. 7 Ensure bag is clear of pick-up tube.
8 Foreign objects in mix. 8 Clear blockage. Use fresh mix.
9 Check valve is backwards. 9 Observe fl ow arrow for proper orientation.
Overrun too low or
no overrun.
1 Overrun setting too low. 1 Increase overrun setting.
2 Air leak. 2 Tighten all hose clamps.
3 Air compressor not pumping air. 3 Contact local Stoelting Distributor.
4 Air check valve in backwards. 4 Check arrow for direction of fl ow.