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2021/01 Rev. 0.4
14 / 38
Display Possible cause Solution
E27
NTC SHORT CIRCUIT
HOT WATER BOILER
Temperature sensor measures a
temperature over 125 °C or has a
short circuit.
The control has disabled the heater
output.
T (°C) R (Ohm) T (°C) R (Ohm)
0 334.000 70 16.874
10 201.660 75 14.198
20 125.470 80 11.998
25 100.000 85 10.181
30 80.223 90 8.674
40 52.589 95 7.419
45 42.951 100 6.369
50 35.272 120 3.581
55 29.119 140 2.117
60 24.161 160 1.307
65 20.144
NTC resistance table
Check the temperature sensor operation
in the service menu 2.07 Hardware test
/ inputs / temperature.
AISI 316L / 1.4404
O-ring 10,82 x 1,78mm
M12 x 1
HEX17
ww-yy
Boiler overheated, let the boiler cool
down.
Check whether the boil-dry protection
was activated. Reset if necessary.
Attention; the metal reset levers are LIVE!
145°C +/- 7,5K
10A / 230Vac
Reset
E28
NO NTC
HOT WATER BOILER
DETECTED
Temperature sensor is not detected.
Check the NTC sensor and wiring /
connection.
E29
BREWER LEAVE
HOME TIME OUT
The brewer did not leave the home
position within 1,7 sec.
Check if the brewer unit is blocked.
Take the brewer out. Open the brewer
and remove all the coffee residue from
the cylinder and clean the thorough
under the hot water tap.
Treat the error like described in Error
30.
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