26
5.4 TROUBLESHOOTING - MIX PUMP
PROBLEM
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.
7. Defective toggle switch.
7. Check continuity; repair or replace.
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 4.9
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 flow arrow for proper orientation.
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 flow.
POSSIBLE CAUSE
REMEDY
Note 1: A properly working pump will fill 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.
Pump operates but
cylinder will not
fill.
Overrun too low or
no overrun.
Pump motor does
not run.
Summary of Contents for STOELTING O431RC
Page 1: ...Model O431RC OPERATORS MANUAL Manual No 513664 Rev 2 ...
Page 2: ......
Page 34: ...28 ...
Page 38: ...32 ...
