Bosch HP270-2 - Troubleshooting - Code E11; E11 - Lock Out Error (Low Pressure Circuit)

Page 51 from 56 6-720-821-364 SM HP270 – 250 - 200 2016/12 en
Code E11 – Lock Out Error (reset by pressing OK for more than 3 sec)
Fault in the low pressure circuit side
SW HPAF0501 / 0701 – Lock out (electrical heater backup needs manual activation after reset in case of error persist)
SW > HPAF0502 / 0702 – Lock out (automatic electrical heater backup activation to ensure minimum 40ºC of hot water)
Failure in the low pressure circuit side:
low thermal power due to insufficient air
flow through evaporator
NTC Fins < -17ºC during > 10 min and
compressor in operation for < 60min
Yes
No
Room area is ventilated?
Fan is in operation ?
Ensure fan connector is
connected and measure
supply voltage
End
Appliance installed
without ducts?
Check run / start
capacitor
Ensure air NTC is in
specified location
Yes
Minimum room volume
is 20 m
3
/ Minimum air
ventilation grille 220 cm
2
No
Yes
Clearances are as stated
in IM?
Minimum room height
2.2 m (install elbows at
module casing to avoid
cold air recirculation)
No
Yes
Problem solved?
Yes
No
No
Measure air flow at
module casing inlet
(minimum 300 m
3
/h)
Air ducts have specified
diameter?
Appliance installed with
ducts?
Yes
Check pressure loss and check
if min air flow = 300 m
3
/h
No
High pressure loss in the
air ducts?
Máx pressure loss:
Fan speed 1 – 60 Pa (L eqv – 30 m)
Fan speed 2 – 180 Pa (L eqv – 70 m)
Refer to IM to estimate máx
equivalent length / fan speed
selection
Air flow / Fins NTC is in
specified position?
Yes
No
Yes
Correct position
No
Yes
Ensure fins NTC is in
specified location