Diagnosis & Solution; Eeprom Parameter Error (E0/F4) - Bosch Climate 5000 Series Service Manual

Service Manual
8 Diagnosis & Solution

8.1 EEPROM parameter error (E0/F4)

Error Code
Malfunction decision conditions
Supposed causes
Table 22
Troubleshooting:
Power off, then restart the
unit 2 minutes later.
If error continues
Replace the outdoor
main PCB.
If error continues
Replace the indoor
main PCB.
Figure 31
EEPROM: a read-only memory whose contents can be erased and reprogrammed
using a pulsed voltage. For the location of EEPROM chip, please refer to
the below photos.
Indoor PCB
Figure 32
The two photos above are for reference only, they may not be identical to
the PCBs shipped with your equipment.
Bosch Thermotechnology Corp. | 04.2020
Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Outdoor Unit | 41
E0 (indoor) / F4 (outdoor)
Indoor or outdoor PCB main chip does not receive feedback from EEPROM chip.
Incorrect installation of indoor to outdoor control wire or line voltage wiring
PCB faulty
Outdoor PCB
Data subject to change