Customer Instruct And Technical Faults - Jenn-Air JBC7624BS Technical Education

DIAGNOSTICS & TROUBLESHOOTING

Customer Instruct and Technical Faults

DISPLAY/ WHEN
PROBLEM
COLD COFFEE
Since the
beginning of
operation or
sometime
later.
BAD COFFEE Since the
STRENGTH OR beginning of
COFFEE IS NOT operation or
CREAMY sometime
later.
Did you change
the coffee
brand?
GENERAL When machine
ALARM was turned on.
Displayed after
a quick motor
run.
After 6 minutes
of running, the
coffee system
is still in
heating mode.
There was a
strange noise
when the
infuser started
moving
FILL TANK! Message is
displayed even
though there
is water in the
tank.
5-4 Jenn-Air Built-in Coffee System
n
For Service Technician Use Only
POSSIBLE CAUSE
Cups have not been warmed
Temperature is set too low
Infuser is cold
Scale clogged the coffee heater
Coffee is ground too fine
Coffee is ground too coarse
Grinder is worn out
Blend of coffee is unsuitable
NTC, Coffee
NTC, Steamer
Upper or lower diverter switch
Hall sensor board
Main board
Open thermal cutoff
Heating element
Main board
Upper and lower diverter switch do not
open or close.
Float
Reed Sensor
SUGGESTED CORRECTED ACTION PROCEDURE
Warm the cups by rinsing them with hot water.
Set temperature using the menu settings (see Use & Care
Guide).
Before making coffee, use the menu to run a rinse function
(see Use & Care Guide).
Check the coffee temperature after the third coffee brewed.
It has to be 172.4°F (78°C). If it is lower, descale the coffee
system (see Use & Care Guide).
Check the grinder setting. Rotate the knob one click
clockwise, while the grinder is running. Make 2-3 coffees
and check them. If the powder is still too fine, continue to
rotate the knob clockwise, checking the grind after each
click.
Check the grinder setting. Rotate the knob one click
counterclockwise, while the grinder is running. Make 2-3
coffees and check them. If the powder is still too coarse,
continue to rotate the knob counterclockwise, checking the
grind after each click.
Unplug coffee system or disconnect power. Replace the
grinder.
Use a blend of coffee specifically for espresso coffee
machines.
Unplug coffee system or disconnect power. Check
connection between NTC and main board; check ohm value.
If it is 0 (short circuit) or infinite (open circuit), repair or
replace if necessary.
Unplug coffee system or disconnect power. Check upper and
lower diverter switch. Replace if needed.
Unplug coffee system or disconnect power. Check
connection between the main board and the Hall Sensor
board. Replace if needed.
Unplug coffee system or disconnect power. Replace main
board if needed.
Unplug coffee system or disconnect power. Check
connections between TCO and main board; check ohm
value. If it is infinite (open circuit), replace TCO.
Unplug coffee system or disconnect power. Replace heating
element.
Unplug coffee system or disconnect power. Check all
connections to main board. Replace main board, if needed.
Unplug coffee system or disconnect power. Check upper and
lower diverter switch, and replace if needed.
Check that the float is present in the tank; the float has to
be free to move inside the water tank.
Check that the reed is correctly connected. Replace if
needed.