Nissan Maxima Service and Repair Manual: System description

REFRIGERATION SYSTEM

Refrigerant Cycle

Refrigerant flow

Nissan Maxima. Refrigerant Cycle

  1. Compressor
  2. Pressure relief valve
  3. Liquid tank
  4. Refrigerant pressure sensor
  5. Condenser
  6. Expansion valve
  7. Evaporator
  8. Blower motor
  9. High-pressure gas
  10.  High-pressure liquid
  11.  Low-pressure liquid
  12.  Low-pressure gas
  13.  Suction port
  14.  Discharge port
  15. Outside air

The refrigerant from the compressor flows through the condenser with liquid tank, the evaporator and returns to the compressor. The refrigerant evaporation in the evaporator is controlled by an expansion valve.

Component Part Location

Nissan Maxima. Component Part Location

  1. Heater and cooling unit assembly
  2. High-pressure pipe
  3. High-pressure A/C service valve
  4. High-pressure flexible hose
  5. Air deflector (RH)
  6. Junction pipe
  7. Condenser
  8. Liquid tank
  9. Refrigerant pressure sensor
  10. Condenser, liquid tank and refrigerant pressure sensor
  11. Air deflector (LH)
  12. Compressor
  13. Low-pressure flexible hose
  14. Low-pressure A/C service valve
  15. Low-pressure pipe
  16.  High-pressure pipe to heater and cooling unit assembly
  17. . High-pressure flexible hose to compressor
  18.  Low-pressure flexible hose to compressor

Refrigerant System Protection

Refrigerant pressure sensor

The refrigerant system is protected against excessively high or low pressures by the refrigerant pressure sensor, located on the condenser. If the system pressure rises above or falls below the specifications, the refrigerant pressure sensor detects the pressure inside the refrigerant line and sends the voltage signal to the ECM.

The ECM then ceases to supply power to the A/C relay which disengages and stops the compressor when pressure on the high pressure side (as detected by refrigerant pressure sensor) is over approximately 2,746 kPa (28 kg/cm2, 398 psi), or below approximately 120 kPa (1.22 kg/cm2, 17.4 psi).

Pressure Relief Valve

The refrigerant system is also protected by a pressure relief valve, located in the rear head of the compressor.

When the pressure of refrigerant in the system increases to an abnormal level [more than 3,727 kPa (38 kg/ cm2, 540 psi)], the release port on the pressure relief valve automatically opens and releases refrigerant into the atmosphere.

    Preparation
    PREPARATION Special Service Tool The actual shapes of the tools may differ from those illustrated here. HFC-134a (R-134a) Service Tool and Equipment Do not mix HFC-134a (R-134a) refrigerant an ...

    Basic inspection
    DIAGNOSIS AND REPAIR WORK FLOW WITH COLOR DISPLAY WITH COLOR DISPLAY : How to Perform Trouble Diagnosis For Quick And Accurate Repair WORK FLOW 1.LISTEN TO CUSTOMER COMPLAINT Interview the cust ...

    Other materials:

    Horizontal synchronizing (HP) signal circuit
    Description In composite image (AUX image, camera image), transmit the vertical synchronizing (VP) signal and horizontal synchronizing (HP) signal from display unit to AV control unit so as to synchronize the RGB images displayed with AV control unit such as the image quality adjusting menu ...

    B2618 BCM
    Description BCM controls the various electrical components and simultaneously supplies power according to the power supply position. BCM checks the power supply position internally. DTC Logic DTC DETECTION LOGIC NOTE: If DTC B2618 is displayed with DTC U1000, first perform the trou ...

    Brake warning lamp
    Description NOTE: 1: Brake warning lamp will turn on in case of parking brake operation (when switch is ON) or of brake fluid level switch operation (when brake fluid is insufficient).  2: After starting engine, brake warning lamp is turned off. Component Function Check 1.B ...

    Nissan Maxima Owners Manual

    Nissan Maxima Service and Repair Manual

    © 2017-2021 Copyright www.nimainfo.com
    0.0116