Vollrath 219-02 - Manual (Page 25)

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SECTION 5
TROUBLESHOOTING
WARNING
NEVER ATTEMPT TO REPAIR OR PERFORM MAINTENANCE ON MIX PUMP UNTIL THE MAIN
ELECTRICAL POWER HAS BEEN DISCONNECTED.
5.1 PUMP MOTOR DOES NOT RUN
Cause Correction
Plastic guard is not in place............................................. Install plastic guard.
Power to pump is off........................................................ Supply power to pump.
Low voltage. .................................................................... Check for low voltage.
Pump motor overloaded. ................................................... Press “Drive Reset” button.
Guide rods on pump are sticky. ....................................... Clean and lubricate. (Refer to Section 4.3B)
Frozen mix particles in liquid mix. .................................... Remove frozen mix.
Pressure switch on pump is defective. ............................. Check continuity of pressure switch. Replace.
Defective starter relay (motor buzzing). ............................ Replace starter relay. (On older models.)
Defective motor. ............................................................... Check motor amperage draw. Replace motor.
Defective toggle switch..................................................... Check continuity, repair or replace.
Defective safety switch..................................................... Check continuity, repair or replace.
Broken wire or loose connection....................................... Locate and replace or repair.
5.2 PUMP OPERATES BUT CYLINDER WILL NOT FILL
Cause Correction
Frozen mix particles in liquid mix. ................................... Thaw, remove frozen mix.
Foreign object blocking operation or pump. .................... Disassemble pump and clear blockage.
Mix inlet valve is stuck or “O”-ring defective. ................... Disassemble pump and check mix inlet valve and “O”-
ring.
Mix outlet valve “O”-ring is defective. .............................. Disassemble pump and check “O”-ring.
5.3 LOW OVER-RUN
Cause Correction
Foreign object blocking operation of pump. .................... Disassemble pump and clear blockage.
Air inlet check valve or retainer ....................................... Disassemble pump and check air inlet
stuck or restricting air flow. check valve and retainer.
Air outlet valve is stuck or “O”-ring .................................. Disassemble pump, check air outlet valve
is defective.
and “O”-ring.
Pump quad ring is worn out............................................. Replace quad ring.
In the event the above Troubleshooting Guide does not help to correct the problem, the local dealer, distributor
of the factory Service Department should be contacted.