20
Grindmaster
®
Coffee Brewers
Troubleshooting Guide (continued)
Heating problems (continued)
PROBLEM
POSSIBLE CAUSE
SERVICE CHECK
SOLUTION
Water tank boils
•
Water temperature set
•
Determine operating
•
To prevent boiling, adjust
intermittently (steam
point is too high for the
elevation and
water tank temperature
exits brew basket
operating elevation
compare to the chart
at least 3 degrees below
during heating)
below
the boiling temperature
for the operating
elevation (see
programming section for
adjustment details)
Air heated shuttle is
•
Air heater is blocked
•
•
Clean air heater and
backlit but air heater is
with debris
outlet air opening for
reset hi-limit thermostat
not heating
signs of debris
blocking airflow
•
Air heater fan is faulty
•
Inspect fan for proper
•
Replace fan if needed
or blocked
operation. Observe
LCD display for fan
failure indication
Brew volume too large •
Coffee bed absorbs
•
Account for coffee bed
or too small
brew volume which
absorption in dispensed
results in less volume
brew volume
than actual
programmed brew
volume
•
Portion size on
•
Review programmed
•
Adjust settings to desired
touchpad was not
time settings for the
values
selected correctly
desired brew volume
•
Total dispensed brew
•
Check total brew
•
Reduce volume setting
volume setting is too
volume setting in
and confirm the setting is
high
programming for the
saved to memory
specific recipe which
is considered too
high
•
Spray head is clogged
•
Visually inspect the
•
Clean if needed
spray head for coffee
residue or lime
buildup
•
Brew valves are clogged
•
Visually inspect brew
•
Replace or clean valve if
with lime deposits
valves for signs of
needed
debris
WARNING:
To reduce the risk of electrical shock, unplug the power cord before repairing or replacing
any internal components of the unit. Before any attempt to replace a component, be sure to check all electrical
connections for proper contact. Only a qualified service technician should perform electrical and mechanical
adjustments or repairs.
