Troubleshooting Guide - Grindmaster LCD2-1 Operation Manual

The following procedures must be performed by a qualified service technician.
Problem
No hot water from dispense head
No concentrate is dispensed
Machine does not dispense or fill
Water is cold when dispensed
Drink is too weak or strong
Drink is too hot or cold
Off taste of coffee
If you still need help, call our service department at (800) 695-4500 (USA & Canada only) or (502) 425-4776 (Monday through Friday, 8 am - 8 pm EST)
or an authorized service center in your area. Please have the model and serial numbers ready so that accurate information may be given.
Prior authorization must be obtained from Grindmaster Corporation's Technical Services Department for all warranty claims.
T
ROUBLESHOOTING
Possible Cause
• Door is open (An interlock switch disables
the dispense and fill circuits when the door
is open)
• Faulty thermistor
• Faulty water tank heater
• Fill circuit watchdog timer has tripped
• Water switch is in "OFF" position
• Water supply to machine is turned off
• Check for flashing diagnostic lights on
control board
• Concentrate switch is in "OFF" position
• Bag-in-box is empty
• Bag-in-box connector is pointing up (This
position can create a partial vacuum in the
concentrate tube which may prevent product
from being pumped to the dispense spout)
• Concentrate pickup tube is kinked
• Concentrate pump tubing is clogged
• Transformer is blown
• Blown fuse on controller
• Fill circuit watchdog timer has been activated
• Faulty thermistor
• Faulty water tank heater
• Poor water quality, to include high chlorine
level, heavy mineral concentration or stale
water
G
UIDE
Solution
• Ensure door is latched closed. Reset
power to machine to ensure fill circuit
watchdog timer is reset
• Consult factory for assistance
• Check for open heater and replace if
necessary
• Ensure water supply to machine is on and
reset power to machine. Green Ready
light off indicates heater is activated and
tank is heating
• Ensure switch is in "ON" position
• Ensure water supply is on then reset
power to the machine to reset the fill
circuit watchdog timer
• Ensure switch is in "ON" position
• Ensure bag-in-box is not empty; replace
with new bag-in-box if empty
• Position bag-in-box with connector
pointing down to provide a positive
pressure in the concentrate tube
• Inspect tubing routing and ensure
concentrate tubing is not kinked
• Periodically clean and sanitize tubing per
the Cleaning and Sanitizing procedure
section in this instruction manual
• (Refer to Control Diagnostic diagram)
Check if green LED on control board is
illuminated when machine is powered on.
Green LED indicates that control is
receiving proper supply voltage from
transformer. Replace transformer if
LED does not illuminate.
• Check fuse and replace if necessary
• Ensure water supply to machine is on
and reset power to machine to reset
watchdog timer
• Check if Red "Therm/Fail" LED is
illuminated. Replace thermistor if LED
is illuminated.
• Check for "open" heater and replace
if necessary
• Refer to Drink Strength Adjustment
section
• Refer to Thermostat Adjustment
section
• Addition of a taste and odor filter to
incoming water
• Drain water from tank, remove and
delime. If necessary, flush tank with
fresh water.
LCD2-1 & LCD2-3