Philips HD5720/30 Service Manual page 13

TROUBLE SHOOTING
Problem description /
"Error" message displayed
1. MESSAGE
No WATER !
-Fill watertank-
2. MESSAGE
HEATING UP
PLEASE WAIT...
After ± 6 minutes
GENERIC ALARM !
3. MESSAGE
INSERT BREWING
UNIT !
4. MESSAGE
Flushing...
After 20 – 30 seconds
'GROUND TOO
FINE! –Adjust mill'
and 'OPEN STEAM
KNOB!
FAILURES WHEN SWITCHING ON THE APPLIANCE
Actions to perform
• Fill tank with water.
• Check function of the Reed sensor
(no magnet, open contact = >>> Ω,
magnet closed contact = 0 Ω)
• Check if Coffee heater is heating up.
• Place brewing unit.
• Check the function and circuit of micro
switch (M1).
• Check if the micro switch mechanical will
be activated if the brewing unit is properly
placed and the brewing unit is in top
position.
• When water is pumped through the
system, the fl ow meter measures the
pumped volume. When the system detects
a mismatch in expected and measured
volume the failure will be displayed.
• Check if the pump is pumping.
• Check the fl ow meter and it's circuit is
functioning.
HD5720/30
Hints/tips/solution
• Check if fi lled tank is inserted correctly.
• Check presence of Magnet in tank or see if
it is jammed.
• For testing purposes short circuit jumper
(J7) display message will disappear.
• Exchange Reed sensor.
• Check voltage is present on connectors
(F1) & (F6) (if not exchange PCB)
• Check Fuse/TCO became defect (2x)
(exchange when defect)
• Check resistant of heating element.
(45 - 55 Ω) (exchange when defect)
• If coffee heating element is heating up
check function/circuit of NTC coffee
heater. (J5) PCB.
• Exchange micro switch. (M1).
• Check if water is present in the water
container and the water container has
been correctly placed. See if water is
visible in the area container - pump.
• Check if the pre fi lter not became clogged
by particles.
• Check if voltage is during pumping
present on connectors (F2) & (F10).
(if not exchange PCB)
• Check if voltage is during pumping
present on the pump.
(if not check the TCO on the pump,
exchange when defect)
• Exchange pump.
• Exchange Flow meter.
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