Bosch CLIMATE 5000 Service Manual page 48

Troubleshooting
Index:
1. Indoor or Outdoor DC Fan Motor (control chip is in fan motor)
Power on and when the unit is in standby, measure the voltage of pin1-
pin3, pin4-pin3 in fan motor connector. If the value of the voltage is not
in the range showing in below table, the PCB may be defect and need to
be replaced.
• DC motor voltage input and output (voltage: 220-240V~):
No. Color Signal
1
Red Vs/Vm
2
--- ---
3 Black GND
4 White Vcc
5
Yellow Vsp
6
Blue FG
Table 19.
Red Black White Yellow Blue
Fig. 71.
2. Indoor AC Fan Motor
Power on and set the unit running in fan mode at high fan speed. After
running for 15 seconds, measure the voltage of pin1 and pin2. If the
value of the voltage is less than 100V(208~240V power supply) or
50V(115V power supply), the PCB may be defect and need to be
replaced.
Input Terminal
Red
Black
White
Fig. 72.
48
Voltage
280V~380V
---
0V
14-17.5V
0~5.6V
14-17.5V
Red
White
Black
CLIMATE 5000 RAC SINGLE SPLIT (R32) – 6720894076 (2019/08)