Bosch IDS BOVA20 - Page 29

Installation Instructions
Bosch IDS BOVA20 & BOVC20 Split System Heat Pump - BTC 761703107 A (12.2023)
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Main Control Board for 48/60 ODU Model
Figure 46
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No. Function description
1 Pressure equalizer valve port
2 Compressor crankcase heater port
3 Reversing valve port
4 Thermostat wire connections
5 EEV port
6 Th sensor port
7 TF sensor port
8 T3 T4 T3L sensor port
9 Pressure transducer port
10 T5 sensor port
11 Reserve
12 Reserve
13 Reserve
14 High pressure switch port
15 USB port
16 SW2 FORCE BUTTON
17 SW3 CHECK BUTTON
18 J2 Dip SWITCH: Select capacity
19 SW5 Dip SWITCH:Defrost logic settings
20 SW4 Dip SWITCH:Control logic settings
21 Reserve
22 IC20：EEPROM Chip
23 LED
24 IC14：Drive EEPROM Chip
25 ECM motor port
26 Compressor: W port
27 Compressor: V port
28 Compressor: U port
29 Power input
30 Power input