Grindmaster LIQUID COFFEE DISPENSER LCD-2A - Manual (Page 18)

Page 18 Model LCD-2R and LCD-2A
Problem/Cause Remedy
LCD DISPLAY INDICATES “OVERFLOW”
NOTE: Water must be drained from the tank below the float switch after the fault condition is diagnosed.
Water level probe sensitivity is set too low Increase sensitivity of water fill circuit (see programming notes:
Water Level Trip)
Faulty or corroded level probe Remove level probe and grommet. Remove any scale or miner-
al buildup and reassemble.
Faulty level control circuit wiring Ensure both probe and probe ground connections are securely
fastened to water tank top. Check wiring for defects.
Inlet water pressure too high Ensure water pressure is below 100 psi
Weeping water inlet valve Check water inlet valve; replace if necessary (Note: a slow
overflow indicates this condition)
WATER TANK BOILS
Temperature setting too high for elevation of installation Adjust temperature down, refer to temperature adjustment in
Operators Manual.
Heater contactor stuck in closed position Check contactor for welded contacts; replace if necessary
Defective thermistor Check for flashing diagnostic lights on control board and refer
to explanation of diagnostic LEDs
WATER CONTINUES TO DRIP FROM DISPENSE SPOUT
Weeping dispense valve Replace dump valve
CONCENTRATE CONTINUES TO DRIP FROM DISPENSE SPOUT
Peristaltic pump tube is worn out Call for service.
Incorrect tubing installed Confirm that tubing is OEM part; replace if necessary
DRINK IS TOO WEAK OR STRONG
Mix ratio needs adjustment Refer to “Setup” section of programming guide to alter Coffee
and Decaf ratios.
Blocked pump and delivery tubing (too weak) Follow cleaning instructions to prevent restrictions inside pump
tubing
Pump tubing is worn out (too weak) Replace tubing on an as-needed basis depending on usage
DRINK IS TOO HOT OR COLD
Refer to “Setup” section of programming guide to alter water tank temperature.
Heavy usage
Consider providing hot water to the supply inlet to maximize
recovery
Consider having the machine converted to 240V operation for
maximum recovery time
OFF TASTE OF COFFEE
Machine needs cleaning Follow cleaning instructions to ensure concentrate delivery
tubing is clean
Poor water quality to include high chlorine level, heavy mineral
concentration, or stale water. Install a taste and odor filter to the water inlet of the machine.
Water tank requires descaling. Drain water from tank, remove tank, remove tank and de-scale,
thoroughly rinse tank before re-installing. Flush tank with fresh
water several times before replacing in service.
Out of date coffee concentrate Check date stamp on product container
Troubleshooting Guide (cont.)