Lo-L9 Troubleshooting - Bosch IDS 2.0 Service Manual

5 8 | Bosch IDS 2.0

12.3.17 LO-L9 Troubleshooting

LED display output:
Description:
Possible causes:
Table 45
Procedure:
Figure 32
1) See Section 13.8
Data subject to change
LO-L9
The IPM module protection
 Control board failed
 Compressor failed
 Abnormal pressure
Yes
Are the service
Open the service valves
valves closed?
No
Yes
Is the power supply
Correct power supply
stable?
No
Yes
Is there any
blockage in the
refrigerant pipe?
No
Yes
Is there any
abnormal noise
Replace compressor
from the
compressor?
No
Power off and wait 3 minutes
before powering on
Yes
Does the unit run
Check the refrigerant
normally for at least
charge, refer to IOM
1 hour?
No
No
Is the compressor
Replace compressor
operating normally? 1
Yes
Replace control board
Remove blockage
Service Manual
07.2021 | Bosch Thermotechnology Corp.