Quantum Series Installation and Service Manual
Concentrate warm, water cold (con’t)
Brix Problem
Pump Inoperative
Loss of refrigerant charge due to leak in system
Water supply pressure too low, less than 20 psi (1.4 bar) flowing or water pressure fluctuates sharply
Water flow control binding or spring is defective
Improperly thawed concen- trate. Brix changes as the concentrate temper- ature changes (concen- trate becomes thinner as temperature rises)
Check that the rollers on the pump are spinning freely with no tube in place
Pump motor defective
No power to transformer or no 28VAC output from transformer
Defective voltage regulator board (VRB) located inside front electrical box
Defective portion control board
Repair leak and recharge system
Correct water supply problem to ensure a constant 40 psi (3 bar) flowing to the dispenser
Clean and/or replace parts as nec- essary
Concentrate should 34oF -40 oF (1.1 oC –4.5 oC) prior to loading
If they are sticky or locked up see platform removal and cleaning procedure.
28VDC should be present at pump motor during dispense. If volt- age is present and motor does not start, replace pump motor
Confirm transformer has line volt- age present on primary side. If no 28VAC output from the sec- ondary replace transformer
Measure across the blue and black wire located in the upper left corner of the board. There should be 28VDC present when the dispense button is pressed. Replace VRB if necessary
Disconnect wire harness from rear of portion control, close door switch and short the orange and black wires together on the harness. If unit dispenses por- tion control board is defective. If it does not dispense the voltage regulator board is defective.
720901120 | - 16 - |
