7 2 | Bosch IDS 2.0
13.9 System Charge
within 55-120°F?
Is indoor temperature
between 70-80°F?
Start the system in cooling mode for
at least 10 minutes
Short press "Force" button (SW2), and
operate the system for at least 20 min
Measure and calculate superheat and
subcool , refer to IOM for instructions
Are SH and SC in
Adjust charge according to IOM
Is there a blockage
performance chart
Push checkpoint button to display
checkpoint #16 for discharge superheat
Is checkpoint value
Recover charge and
Figure 46
Data subject to change
Is ambient temp
Temperature out of range,
No
charge unit via weigh in
method. Refer to IOM
Yes
Yes
Range A or B in
No service required
Table
No
Are SH and SC in
Yes
Range A or B in
No service required
Table
No
Verify SH and SC are
correctly measured and
No
Are SH and SC in
refrigerant is being
Range C in Table
adjusted correctly, refer
Yes
Yes
Remove blockage, clean
on the air filter?
filter, or replace filter
No
Are the blower
motor speed
Change blower fan
No
settings correct?
speeds through SW6-1,
Refer to airflow
SW6-2 dip switches
in IOM
Yes
Yes
No service required
#16 >40F?
No
evacuate
24K/36K
NOTE: Use Range A for indoor units with adjustable TXV and
to IOM
Model
Range
SC/°F
A
10±2
B
8±2
C
6±2
A
8±2
48K
B
6±2
C
5±2
A
8±2
60K
B
6±2
C
5±2
non-adjustable TXV.
Use Range B for indoor units with non-adjustable TXV.
07.2021 | Bosch Thermotechnology Corp.
Service Manual
SH/°F
10~18
7~10
5~7
9~18
7~9
5~7
8~18
6~8
5~7
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