Philips HD5720/30 Service Manual page 14

TROUBLE SHOOTING
Problem description /
"Error" message displayed
1. MESSAGE
NO COFFEE BEANS!
- Fill container-
2. MESSAGE
LESS GROUND
COFFEE !
3. MESSAGE
EMPTY WASTE BIN !
FAILURES DURING OPERATING THE APPLIANCE
Actions to perform
• Fill container with beans.
• No motor sound during grinding process is
noticed.
• You hear a humming noise or rattle sound,
probably the grinder is blocked by a stone
or other material.
• The coarseness of the Coffee grinder is set
to fi ne, so almost no coffee will be grinded.
• The micro switch (M1) brewing unit top
position has been activated to soon when
the brewing unit move upwards or brewing
unit position counter (J3B) (Hall sensor)
is inaccurate (time and position is how
the appliance detects if ground Coffee is
present)
• User selected Coffee ground
• To less ground Coffee has been applied.
• The pre-ground Coffee funnel has been
blocked!
• The micro switch (M1) brewing unit top
position has been activated to soon when
the brewing unit move upwards or brewing
unit position counter (J3B) (Hall sensor)
is inaccurate (time and position is how
the appliance detects if ground Coffee is
present)
• Empty waste bin. Check the function and
circuit of micro switch (M3).
• Check if the micro switch mechanical will
be activated/de-activated if the waste bin
will be removed/inserted.
HD5720/30
Hints/tips/solution
• Check if beans are visible in the grinder.
• Check if voltage is present during grinding
on the (F0) & (F9) connectors.
(if not exchange PCB)
• Check wires/connection grinding motor
and replace grinding unit in case the
motor is defect.
• Remove the obstacles out of the grinder
wheels.
• Adjust the Grinder coarseness.
(turn clockwise)
• Check if micro switch is properly
functioning and/or is activated properly by
the mechanical action of the brewing unit.
• Check Hall sensor is correct counting/
detecting position.
• Add pre-ground Coffee.
• Supply one Coffee spoon of ground coffee.
• Open/clean the pre-ground Coffee funnel.
• Check if micro switch is properly
functioning and/or is activated properly by
the mechanical action of the brewing unit.
• Check Hall sensor is correct counting/
detecting position.
• When emptying waste bin the software
monitors if the waste bin micro switch
(M3) has been inactivated for at least
15 seconds. (time needed to dispose the
coffee) (appliance must be plugged on the
mains to monitor this action.
• Exchange micro switch. (M3).
14-23