Bosch HP270-2 Technical Manual page 49

Check Compressor
No continuity should be measured between
compressor terminal and chassis:
C – chassis ≠ 0
R – chassis ≠ 0
S – chassis ≠ 0
Ensure compressor resistance is ok (at
20ºC)
C – R ≈ 5.84 Ω
C – S ≈ 7.62 Ω
Failure in High Pressure Side:
Compressor in Operation > 30
min before lock out
High Pressure Switch /
compressor thermal protection
activation 12 times consecutively
Too much refrigerant ?
Note: In new software version, in case of E09, the electrical heater is automatically switched ON to ensure a
minimum of 40ºC in tank until technician intervention (even if appliance is in HP or combi). Always do reset to error
before start troubleshooting as e-heater cable could be energized if T top < 40ºC.
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Before the E09 error after the 12 tentatives, the
frost symbol blinks in display during the waiting
time of 1 hour until next attempt to start
Water flow through condenser
is as specified?
Water shortage for more than
12 h ?
NTC sensor top out of
pocket?
Remove gas charge and
ensure system has +/- 400 gr
6-720-821-364 SM HP270 – 250 - 200 2016/12 en
No
Ensure circulation pump is
free of sediments / debris
Yes
Yes
Check air presence and
purge hydraulic circuit in
No
Yes
in speed 1 and ensure
plate heat exchanger is
module
Correct position and
ensure enter +/- 30 cm
(until white sticker)