Service Manual Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Outdoor Unit | 41
Bosch Thermotechnology Corp. | 04.2020
Data subject to change
8 Diagnosis & Solution
8.1 EEPROM parameter error (E0/F4)
Error Code E0 (indoor) / F4 (outdoor)
Malfunction decision conditions Indoor or outdoor PCB main chip does not receive feedback from EEPROM chip.
Supposed causes
f Incorrect installation of indoor to outdoor control wire or line voltage wiring
f PCB faulty
Table 22
Troubleshooting:
Figure 31
If error continues
Replace the indoor
main PCB.
Power off, then restart the
unit 2 minutes later.
Replace the outdoor
main PCB.
If error continues
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.
Figure 32
Indoor PCB Outdoor PCB
The two photos above are for reference only, they may not be identical to
the PCBs shipped with your equipment.
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