Sunbeam EM6910 Service Technician – Training Manual page 19

 A self-diagnose routine in the software shall be implemented to monitor the
unit performance all the time and give an error warning signal by flashing
power LED in red. (Such as heating element open circuit, thermistor short or
open circuit, water flow meter, water pump malfunction.)
If one part of the unit is malfunction, the whole unit shall keep working.
Refer to figure 14 for LED pattern illumination
Power
 Pressure gauge of 15 Bar shall have rotation range of 0
to the specified artwork.
 Pressure gauge needle shall not vibrate during the coffee brewing process.
 There shall be no water & steam leaking from all connections.
 Showerhead coffee brewing temperature must be within 90 – 95
 The unit must not be interfered by other appliances on the same AC power
line (eg. halogen lamps, chatterbox test).
The unit shall have a cleaning function which is used to clean the internal
coffee flow path.
Cleaning cycle Activation
• From power-off condition, hold down the one-cup and two-cup
buttons, and press the POWER button, then release all buttons.
• All LEDs on the switch panel will chase from left to right, at a
speed of 0.5sec per step indicating the machine is in cleaning
mode.
The cycle proceeds as follows (refer Figure 15 for more information):
• Warm up - The machine is allowed to warm up to normal idle
temperature.
• The machine then repeats the following cycle, 9 times. Close the
dump valve, and pump water for 8 seconds. Stop pumping and
open dump valve simultaneously. Wait for 37seconds (=45sec-
8sec).
• Finish the cycle as follows. Close the dump valve, and pump water
for 8 seconds. Open the dump valve and continue pumping for 22
seconds (=30sec-8sec). Stop pumping.
EM6910 Café Series Espresso Machine
Manual One Cup Two Cups
Figure 14
Cleaning Function
Issue: A
Program
o o
to 270 according
o
C.
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