Bosch IDS 2.0 - E5 Troubleshooting

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Bosch IDS 2.0 Service Manual
07.2021 | Bosch Thermotechnology Corp.
Data subject to change
12.3.3 E5 Troubleshooting
LED display output: E5
Description: High/low voltage protection
Possible causes:
 Power supply ≥270V
 Power supply <172V
 Control board issue
Table 31
Procedure:
Figure 18
Restart system
Replace control board
Yes
No
Yes
Correct power supply/call
utility provider
Correct power supply/call
utility provider
No
Yes
Is the high voltage power supply
≥270V?
<172V?
Is the voltage
between P-N (CN3)
< 310VDC?
No
If power supply is between 180 and 210 V, System
protection code U** will be displayed on the LED
screen. Frequency will be limited to 50 Hz or less.
Is the high voltage power supply