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ACR2000 (GE-48800) Hose Flush Procedure

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NOTE:
  • The following hose flushing procedure must be performed every time the ACR2000 (GE-48800) is used on the hybrid vehicles. It must be completed before the ACR2000 (GE-48800) is connected to the vehicle to begin a diagnostic or service procedure.
  • The high voltage (HV) electric air conditioning (A/C) compressor uses a polyolester (POE) refrigerant oil instead of a polyalkylene glycol (PAG) synthetic refrigerant oil. This is due to the better electrical resistance of the POE oil and its ability to provide HV isolation.
  • The following hose flush procedure is required to prevent oil cross-contamination. Laboratory testing has shown that flushing the ACR2000 (GE-48800) using the following procedure will minimize oil cross-contamination to a negligible amount (<500ppm).
  • Failure to flush the ACR2000 (GE-48800) hoses before adding refrigerant to a hybrid vehicle with an electric A/C compressor may result in an unacceptable amount of PAG oil entering the refrigerant system. It may also cause a battery energy control module hybrid battery voltage system isolation lost diagnostic trouble code (DTC P1AE7) to be set. Additionally the A/C system warranty will be voided.
  • The ACR2000 (GE-48800) will need to be retrofitted with a GE-43600-50 (Hose-ACR2000 Oil Flush Loop) to be able to perform the following procedure. All hybrid dealers will receive a GE-43600-50, with installation instructions, which is a component of the hybrid essential tool package. Dealers not included in the hybrid marketing plan and needing to service a hybrid vehicle can obtain the GE-43600-50 from SPX Kent Moore, 1-800-GM-TOOLS (1-800-468-6657).
    • The GE-43600-50 Retrofit Kit replaces the existing hose mount fittings on the ACR2000. Installation instructions are included to properly update the ACR2000 for hybrid vehicle A/C service.
    • New hybrid compliant A/C refrigerant recharging equipment (GE-48800) will replace current ACR2000 equipment. GE-48800 meets new SAE refrigerant recovery standard J-2788 and is specially designed for GM hybrid vehicle A/C service.

Before Beginning the Hose Flushing Procedure

  1. Always allow the ACR2000 to complete the hose flush cycle to assure that all oil and refrigerant is removed from the hoses and the ACR2000 flow control circuit.
  2. Assure the ACR2000 has at least 4.08 kg (9 lb) of chargeable refrigerant before proceeding.
  3. A Low Filter Flow message displayed during the hose flushing process indicates that the hose couplers are not connected or open.

Hose Flushing Procedure

  1. Connect the ACR2000 service hose couplers to the GE-43600-50 hose flush adapter fittings and open the service hose coupler valves.
  2. Power on the ACR2000.
  3. If there is positive pressure in the ACR2000 service hoses, press START to recover the service hoses. If there is 88 - 98 kPa (26 - 29 Hg) of vacuum showing on the display screen, skip to step 7.
  4. Press Vacuum.
  5. Press Start. Allow the vacuum program to run until the display screen shows between 88 - 98 kPa (26 - 29 Hg).
  6. Press Pause.
  7. Press Main Menu.
  8. Press Scroll Menu.
  9. Press Oil Flush.
  10. Press Next.
  11. Enter 03:00 (for a three minute flush) and press Start.
  12. The ACR2000 will now flush the service hoses for three minutes and then recover the refrigerant
  13. Close the ACR2000 service hose couplers and remove the GE-43600-50 hose flush adapter.
  14. The ACR2000 can now be connected to the hybrid vehicle to perform the A/C system diagnostic or service procedures.
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