VW A/C Compressor
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This type of compressor has been widely used in Volkswagen and Audi hybrid vehicles and can be found cheaply.
Part Numbers, Revisions and Refrigerant
The vehicle, date and refrigerant options have been scavenged from type stickers on compressors in ebay auctions.
| Part Number | HW & SW Revision [1] | Vehicles | Years | Refrigerant |
|---|---|---|---|---|
| 12E820803x | ||||
| 12E820803B | HW 4 - SW 4 | VW e-Golf VII, VW e-Up | 05.2014, | R134a |
| 12E820803C | HW 4 - SW 7 | Audi A3 1.4 TFSI e-tron | 12.2013, 03.2014 | R134a |
| 12E820803D | HW 5 - SW 4 | Audi A3 1.4 TFSI e-tron
?? |
07.2015
07.2018 |
R134a
R134a, R1234yf |
| 12E820803E | HW 2 - SW 5 | VW Passat B8 GTE | 09.2015
06.2016 |
R134a
R134a, R1234yf |
| 5QE816803x | ||||
| 5QE816803 | HW 2 - SW 7 | Audi A3 1.4 TFSI e-tron
VW Golf VII GTE, |
03.2015, 11.2015
09.2016, 06.2017 |
R134a
R134a, R1234yf |
| 5QE816803A | HW 3 - SW 9 | |||
| 5QE816803C | HW 2 - SW 6 | 01.2018 | R134a, R1234yf | |
| 5QE816803D | HW 2 - SW 8 | |||
| 5QE816803F | HW 2 - SW 7 | |||
| 5QE816803H | HW 3 - SW 9 | |||
LIN Bus Communication
| ID | Description | Length | Checksum Type | Byte 0 | Byte 1 | Byte 2 | Byte 3 | Byte 4 | Byte 5 | Byte 6 | Byte 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 31 (0x61) | Answer from the compressor | 8 | Enhanced | HV OK (0 for voltage < 200V, 1 for voltage > 200V) | always 112 | ? | RPM set from command | 110 for V<200V, 14 for V>200V, 46 when running | 0 | 0 | 54 at 109V, 28 at 56V 83 at 166V
scaling: Voltage/2 |
| 32 (0x20) | Command to the compressor | 6 | Enhanced | RPM (decimal from 20-250) | Bit 0: Start, Bit 2: Activate | 0 | 0 | 0 | 0 |
Electrical Connection [3]
connectors are:
HVA 280 KEY_D from TE +HV left side (near to the 12V conn.), -HV right side (far from the 12V conn)
1J0973714 8= +12V , 5= GND, 2= LIN