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Bosch IDS 2.0 Service Manual
07.2021 | Bosch Thermotechnology Corp.
Data subject to change
13 Advanced System Check
13.1 Abnormal Pressure
Figure 38
Abnormal
pressure
Fix lineset
Yes
Open service valves
No
Yes
Are the service
valves closed?
No
Is the refrigerant
pipe bent or damaged
on lineset ?
Switch between
cooling and heating
several times
Yes
No
Is
there a blockage
in EEV or
strainer?
Does the
problem
still persist?
Replace EEV
Yes
No
Yes
Is there a blockage
in the TXV?
Replace TXV
Yes
Yes
Replace bi-flow
filter drier
No
Refrigerant cycle
problem
Extreme
temperature
condition
If the
temperature is out of
operation range
Ye s
Shutdown unit
Poor heat
exchange
on ODU
Is there any
blockage on
outdoor coil?
Ye s
Clean outdoor coil
Yes
Follow section 13.6
to check ODU motor
No
Fix clearances,
refer to IOM
Ye s
Clean indoor coil
Yes
No
Fix clearances,
refer to IOM
Ye s
Clean air filter
Switch between
cooling and heating
several times
Does the
problem
still persist?
Yes
Switch between
cooling and heating
several times
Does the
problem
still persist?
Is there blockage
in the bi-flow filter
drier?
Follow section 13.7
to check ODU motor
Is the motor
not running?
Are the clearances
for the ODU correct?
Is there any
blockage on
indoor coil?
Is the motor
not running?
Are the clearances
for the IDU correct?
Is there any
blockage on
air filter?
Poor heat
exchange
on IDU
Poor heat
exchange
Refrigerant
overcharge or
undercharge
Follow IOM
to correct
refrigerant charge
NOTE:
) Is the temperature difference
before and after the EEV
extremely high?
) Is the temperature difference
before and after the TXV
extremely high?
) Is there more than 2 before
and after the drier in force
mode?
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