Bosch Climate 5000 Series Service Manual page 24

2 4 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Outdoor Unit
7.1.3 PCB: Regular Single Zone 18K & 24K
BMS500-AAS018-1CSXRA, BMS500-AAS018-1CSXXA, BMS500-AAS024-1CSXRA, BMS500-AAS024-1CSXXA
7.1.4 PCB: Hyper Heat Single Zone 9K, 12K & 18K
BMS500-AAS009-1CSXHB, BMS500-AAS012-1CSXHB, BMS500-AAS018-1CSXHB
Figure 14
Number Name
1 Power Supply
2 S
3 4-WAY
4 HEAT1
5 AC-FAN
6 HEAT2
7 CN38
8 PMV
9 DC-FAN
10 FAN_IPM
11 CN19
12 TESTPORT
13 CN9
U
14 V
W
15 COMP_IPM
Table 18
Data subject to change
CN# Description
CN3 Earth: connect to Ground
CN7 N_in: connect to N-line (208-230V AC input)
CN8 L_in: connect to L-line (208-230V AC input)
CN3 S: connect to indoor unit communication
CN60 connect to 4 way valve, 208-230V AC when is ON.
CN17 connect to compressor heater, 208-230V AC when is ON
CN11 connect to AC fan
CN16 connect to chassis heater, 208-230V AC when is ON
CN38 connect to PC communication
CN18 connect to Electric Expansion Valve
CN414 connect to DC fan
IPM 501 IPM for DC fan
CN19 internal drive motor
CN23 used for testing
CN9 connect to PC communication
CN28 connect to compressor
CN29 0V AC (standby)
CN30 10-200V AC (running)
IPM 301 IPM for compressor
Service Manual
04.2020 | Bosch Thermotechnology Corp.