Bosch IDS BOVA60-15 - Troubleshooting E5 Error Code; Troubleshooting E6 Error Code

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Installation Instructions
Bosch IDS BOVA15 Split System Heat Pump - BTC 761701317 A (02.2022)
Figure 44
E5 (High/low voltage protection)
Is the
high voltage power supply
≥270V?
Correct power
supply/call
utility provider
Replace control
board
Restart system
Yes
No
Yes
No
Yes
No
Correct power
supply/call
utility provider
Is the
high voltage power supply
≤172V?
Check
PFC Module: power on
the unit, when the fan is running,
is the voltage between
P-N (CN3) <310V?
Figure 45
E6 (Outdoor DC fan motor fault)
Is ODU
fan motor wire (CN3)
connection to control
board secure?
Secure connection
Power off and remove
blockage or replace
fan blade
Yes
No
Yes
No
Yes
No
Yes
Is the
fan blade damaged
or is foreign matter blocking
the fan?
Are
outdoor weather
conditions preventing the fan
from operating
normally?
Power off until
severe weather
conditions subside
Replace motor
Is the motor
insulation resistance
>100KΩ?
Restart system
No
Yes
No
Replace
control board
Did the
control board fail?
No
Yes
Replace motor
Is the
resistance of two
windings (U2,V2,W2)
(CN32) >36Ω, and/or
the resistance between
compressor winding
and ground
>10MΩ?