Bosch Climate 5000 Series Service Manual page 30

Service Manual
7.3.2 PCB: Regular and Max Performance Single Zone 9K & 12K
BMS500-AAS009-1CSXRC, BMS500-AAS009-1CSXHC, BMS500-AAS012-
1CSXRC, BMS500-AAS012-1CSXHC
Figure 24
Number Name
1 Power Supply (CN1A)
2 HEAT1
3 4-WAY
4 HEAT2
5 AC-FAN
6 PMV
7 TESTPORT
8 T5 T4 T3
9 DC-FAN
10 FAN_IPM
W
11 U
V
12 COMP_IPM
Table 16
3 0 |
CN# Description
CN3 Earth: connect to Ground
CN1 N_in: connect to N-line (208-230V AC input)
CN2 L_in: connect to L-line (208-230V AC input)
CN16
S: connect to indoor unit communication
CN17 connect to compressor heater, 208-230V AC when is ON
CN60 connect to 4 way valve, 208-230V AC when is ON.
CN15 connect to chassis heater, 208-230V AC when is ON
CN25 connect to AC fan
CN31 connect to Electric Expansion Valve
CN6 used for testing
CN21/CN22 connect to pipe temp. sensor T3, ambient temp. sensor T4, exhaust temp. sensor T5
CN7 connect to DC fan
IPM 501 IPM for DC fan
CN28 connect to compressor
CN29 0V AC (standby)
CN30 10-200V AC (running)
IPM 301 IPM for compressor
Bosch Wall Mounted Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102301 A (11.2022)