Bosch IDS BOVA15 Installation Instructions Manual page 30

Installation Instructions
WARNING: HAZARDOUS VOLTAGE

When measuring resistance , make sure the unit is powered
off and wait 3 min before taking measurement.
E7 (T5 sensor not reading correctly)
Is the location of the
T5 sensor wrong?
No
Are the
T3 and T5 sensors wired
correctly?
Yes
Is the
resistance of T3/T5 in the range
of Table 16?
Yes
Restart system
Figure 46
3 0 |
Yes Correct the location
Refer to wiring diagram
No
for correct wiring
No Replace T5/T3 Sensor
E9 (EEPROM IC14 fault)
Is EEPROM IC14 chip
properly installed?
Yes
Does EEPROM IC14
have poor contact?
No
Replace control board
Figure 47
H0 (Communication fault in Main Control Chip)
Is the main control chip
properly installed?
Yes
Does main control chip
have poor contact?
No
Replace control board
Figure 48
Bosch IDS BOVA15 Split System Heat Pump - BTC 761701317 A (02.2022)
Power off and correct
No
the connection
Power off and correct
Yes
the contact
Power off and correct
No
the connection
Power off and correct
Yes
the contact