Advanced System Check; Abnormal Pressure - Bosch IDS 2.0 Service Manual

6 4 | Bosch IDS 2.0

13 Advanced System Check

13.1 Abnormal Pressure

Abnormal
pressure
NOTE:
1) Is the temperature difference
before and after the EEV
extremely high?
2) Is the temperature difference
before and after the TXV
extremely high?
3) Is there more than 2℉ before
and after the drier in force
mode?
Figure 38
Data subject to change
Are the service
valves closed?
Is the refrigerant
pipe bent or damaged
on lineset ?
Refrigerant cycle
problem
Is
there a blockage
in EEV or
strainer? 1
No
Is there a blockage
in the TXV? 2
Is there blockage
in the bi-flow filter
drier? 3
If the
Extreme
temperature is out of
temperature
operation range
condition
Poor heat
Poor heat
exchange
exchange
on ODU
Poor heat
exchange
on IDU
Refrigerant Follow IOM
overcharge or to correct
undercharge refrigerant charge
Yes
Open service valves
No
Yes
Fix lineset
No
Yes
Switch between
cooling and heating
several times
Yes
Switch between
cooling and heating
several times
No
Yes
Switch between
cooling and heating
several times
Yes
Shutdown unit
Is there any
blockage on
outdoor coil?
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?
Service Manual
Yes
Does the
problem Replace EEV
still persist?
No
Yes
Does the
problem
Replace TXV
still persist?
Yes
Does the
Replace bi-flow
problem
filter drier
still persist?
Yes
Clean outdoor coil
Yes
Follow section 13.6
to check ODU motor
No
Fix clearances,
refer to IOM
Yes
Clean indoor coil
Yes
Follow section 13.7
to check ODU motor
No
Fix clearances,
refer to IOM
Yes
Clean air filter
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