OptiMeOptiMe
2021/01 Rev. 0.4
8 / 38
Display Possible cause Solution
E14
OUTPUT ERROR
Ingredient motor and valve output
group overloaded (current too high).
The control has disabled the output.
Carry out the checks as specified for
E10 and E11.
E15
AIR BREAK
LEVEL ERROR
Air break minimum water level switch
does not detect water for 8 seconds
during the espresso pump KW2 is
active.
The control has disabled the espresso
pump output.
Check the water supply (pressure), fully
open the water supply tap.
Check the connecting hose for kinks.
Check the level from manual water tank.
E17
MDB ERROR
There is no communication between
the machine and the MDB payment
system.
Check the connection between the ma-
chine and the MDB payment system.
Start up de machine software again.
E18
MIXER GROUP
FET ERROR
Brewer or mixer motor output remains
activated.
Brewer or mixer motor output (FET) is
defective. Replace the main control
board on the right.
E19
OUTPUT FET ERROR
Ingredient motor / valve remains
activated.
Ingredient motor / valve output (FET)
defective. Replace control board.
E21
HOT WATER BOILER
TIME OUT
Heating element is active for 6
minutes.
If the boiler has not come to the set
temperature this error is the result.
The control has disabled the heater
output.
145°C +/- 7,5K
10A / 230Vac
Reset
Check the log menu. If E6 Temperature
hot water to high error also occurred,
the boiler has boiled dry. Check the
NTC sensor and wiring/connection
and check the relays.
Check whether the boil-dry protection
was activated. Reset if necessary.
Attention; the metal reset levers are LIVE!
Check the heating element. The resist-
ance must be approx. 30 Ω
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