E9 Troubleshooting - Bosch IDS 2.0 Service Manual

Split system heat pump condensing units up to 20.5 seer 2-3-4-5 ton capacity r410a

Table of Contents

Service Manual

12.3.6 E9 Troubleshooting

LED display output:

Description:

Possible causes:

Table 34

Procedure:

Figure 21

Bosch Thermotechnology Corp. | 07.2021

EEPROM IC20 fault

 EEPROM IC20 poor contact

 EEPROM IC20 improperly installed

Yes

Is EEPROM IC20

chip improperly

installed?

Yes

Does EEPROM

IC20 have poor

contact?

Replace PCB

Power off and correct the

connection

Power off and correct the

contact

EEPROM IC20 Chip

Bosch IDS 2.0 | 47

Data subject to change

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