Bosch Climate 5000 Series Service Manual page 49

4. DC Fan Motor(for some double fan models)
Power on and when the unit is in standby, measure the voltage of CON1,
pin1-pin2 and pin3-pin2 of CN1 in DC motor driver board. If the value of the
voltage is not in the range showing in below tables, the outdoor main PCB
must has problems and need to be replaced.
Drive Chip ve Ch C C EEPROM EEP E E RO
FAN1
IPM for DC
Fan
Figure 44
Part Description
CON1 Power input for the PCB
CN1 Communication with main PCB
CN2 Test port
FAN1 UVW output for DC fan motor
FAN2 UVW output for DC fan motor
Table 31
CN1 Communication with main PCB
5 4
Figure 45
No. Signal
1 Vcc
2 GND
3 Vsp
4 FG
5 ---
Table 32
Bosch Wall Mounted Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102301 A (11.2022)
C C 2 CN2 CN N N CN C C 1 CN1 CON1 CON1
FAN2
Rec fier
Parameter Remark
192-380V/DC
DC
5V/DC For debugging board
3 2 1
Voltage
13.5-16.5V
0V
0~6.5V
13.5-16.5V
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Service Manual
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