Philips 4000 - Page 48

PHILIPS 4000 and 3000 05 SERVICE MODE
7/18
Start condition
Press the Z4 button to switch on the grinder.
The grinder rotates and in the indication GRINDER the number
increasing up to 5000 (5seconds test). The other numbers inside the
GRINDER box are not important for this test.
ERROR: Thenumberremains0orthegrinderdoesnotrun,orthe
display backlight changes from white to red; check the Grinder and
thewiringfromtheGrindertotheCPU/POWERboard(JP8)
Checkthetemperature
The number shows the heater temperature.
ERROR: IntheindicationHEATERappears“SHORT”,theNTC
temperature-sensorisshorted,thedisplaybacklightchangesfrom
green to red; check the wiring from the NTC temperature-sensor to the
CPU/POWERboard(JP13).
ERROR: IntheindicationHEATERappears“OPEN”,theNTC
temperature-sensorisdetachedorbroken,thedisplaybacklightchang-
es from green to red; check the wiring from the NTC temperature-sen-
sortotheCPU/POWERboard(JP13).
Press the Z1 button to switch on the Heater
Theabsorbedcurrent(Amperometeronthemainsupply)isOK,the
indication HEATER changes from “OFF” to “ON” and the
temperature starts increasing.
Iftemperatureisover100°C,thebacklightchangefromGREENto
YELLOW. This is a ALERT message to avoid heating the HEATER ele-
ment over dangerous temperature.
ERROR: the absorbed current is KO or the temperature does not
increase; check the wiring from the heater to the CPU/POWER
board(JP19)andthewiringoftheNTCtemperature-sensor(JP13).
7000 7 sec. grinding in medium aroma (the number can vary during
operation of the machine)
5000 5 sec. grinding of the coffee grinder in functionality test
523 Number of half-waves that reads the sensor (may vary)
2273 Average distance of the sensor impulse beds (may vary)
2000 Average of the last 4 millings in the normal mode as above (2273)