A/C Compressor Regulator Valve -N280-, Removing And Installing: Notes

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NOTE:

Certain functions on the A/C Compressor Regulator Valve -N280- (for example, a stuck valve or a disruption in the coil) can lead to a complaint regarding the A/C compressor (A/C system doesn't cool, the evaporator ices over, etc.). If the cause is with the A/C Compressor Regulator Valve -N280- (and not the A/C compressor itself), the A/C compressor can be serviced by replacing the A/C Compressor Regulator Valve -N280- -C and D-.

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The A/C Compressor Regulator Valve -N280- -C and D- is not available as a replacement part for all A/C compressors. If the A/C Compressor Regulator Valve -N280- is not available as an individual A/C compressor part, then the entire A/C compressor must be replaced.

The A/C Compressor Regulator Valve -N280- is available in different versions and settings. On the A/C compressor -A- (shown is an A/C compressor manufactured by "Denso" without an A/C Clutch -N25-), the connector for the vehicle wiring harness connection is attached with a short wiring harness to the A/C Compressor Regulator Valve -N280- -C-. On the A/C compressor -B- (shown is an A/C compressor manufactured by "Sanden"), the connector for the vehicle wiring harness connection is mounted directly on the A/C Compressor Regulator Valve -N280- -C-. The removal and installation of the A/C Compressor Regulator Valve -N280- -C and D- on other A/C compressors (other type and manufacturer) is basically the same and only slightly deviates from the procedure described below.

The A/C Compressor Regulator Valve -N280- is available in different versions and settings. On an A/C Compressor with an A/C Clutch -N25- (shown is an A/C compressor manufactured by "Denso"), the connector for the vehicle wiring harness connection is mounted directly on the A/C Compressor Regulator Valve -N280- -A-. On another A/C compressor, the connector for the vehicle wiring harness connection is combined in a 3-pin connector -E- for the A/C Clutch -N25- and the A/C Compressor Regulator Valve -N280-.

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For version -B- of the A/C Compressor Regulator Valve -N280-, the wire connection may be directly connected to the A/C Compressor Regulator Valve -N280-, or there is an additional connector on the A/C Compressor Regulator Valve -N280-.

Removing and installing the A/C Compressor Regulator Valve -N280- -A and B- is essentially the same on both versions. It only deviates slightly from the procedure described below. On an A/C compressor with a 3-pin connector -E-, disconnect the respective wires to the A/C Compressor Regulator Valve -N280- from the A/C Compressor Regulator Valve -N280-, remove from the connector -E- or cut at a suitable location (and reattach using wire connectors from the Wiring Harness Repair Set:VAS1978B ).

If the A/C Compressor Regulator Valve -N280- malfunction was found to be caused by dirt, shavings or abraded A/C compressor material after the removal of the A/C Compressor Regulator Valve -N280-, clean the refrigerant circuit and replace the A/C compressor. Refer to COMPRESSOR, REPLACING ON ACCOUNT OF LEAKAGE OR INTERNAL DAMAGE and REFRIGERANT CIRCUIT, CLEANING (FLUSHING) WITH REFRIGERANT R134A .