Heating, Ventilation and Air Conditioning: Other Honda Insight ZE2

A/C Service Tips and Precautions

The air conditioning system uses HFC-134a (R-134a) refrigerant and polyalkyleneglycol (PAG) refrigerant oil, which are not compatible with CFC-12 (R-12) refrigerant and mineral oil. Do not use R-12 refrigerant or mineral oil in this system, and do not attempt to use R-12 servicing equipment; damage to the air conditioning system or your servicing equipment will result.

Separate the manifold gauge sets (pressure gauges, hoses, joints) for refrigerants R-12 and R-134a. Do not confuse them.

If accidental system discharge occurs, ventilate the work area before resuming service.

R-134a service equipment or vehicle air conditioning systems should not be pressure tested or leak tested with compressed air.

Additional health and safety information may be obtained from the refrigerant and lubricant manufacturers.

1. Always disconnect the negative cable from the 12 volt battery (see «12 VOLT BATTERY TERMINAL DISCONNECTION AND RECONNECTION»(ref-360280-S00079896582010042800000) ) whenever replacing air conditioning parts.
2. keep moisture and dirt out of the system. When disconnecting any lines, plug or cap the fittings immediately; don't remove the caps or plugs until just before you reconnect each line.
3. Before connecting any hose or line, apply a few drops of refrigerant oil to the O-ring.
4. When tightening or loosening a fitting, use a second wrench to support the matching fitting.
5. When discharging the system, don't let refrigerant escape too fast; it will draw the A/C compressor oil out of the system.

Checking for DTCs

The temperature display indicates single or multiple DTCs. If indicator segments A, C, D, E, G, J, AUTO and A/C are on at the same time, there may be an open in the common ground wire. If no DTCs are present, the indicator remains blank.

Scheme 137

DTC CHART

Displaying Sensor Inputs at the Climate Control Unit

The climate control unit receives sensor inputs and has a mode that displays them. This mode shows you what the climate control unit is receiving from each of the sensors, one at a time, and it can help you determine if a sensor is faulty.

Check these items before using the sensor input display mode

1. Turn the ignition switch to ON (II), and check the recirculation door function; press the recirculation button to switch from FRESH to RECIRC. The air volume and sound should change slightly.
2. Set the temperature control knob to the desired test temperature. When selecting the test temperature, note these items: "Lo" temperature setting will default to MAX COOL, VENT, and RECIRC. "Hi" temperature setting will default to MAX HOT, FLOOR, and FRESH. 58 through 86°F (or 19 through 31°C) settings will use the automatic climate control logic.
3. Turn the ignition switch to LOCK (0).

To run the sensor input display mode, follow these steps

1. Turn the ignition switch to LOCK (0).
2. Press and hold both the AUTO and RECIRCULATION buttons, then start the engine.
3. After the engine starts, release both buttons. The display panel control unit will flash the sensor number and then the value for that sensor. Record the value displayed.
4. To advance to the next sensor, press the REAR WINDOW DEFOGGER/MIRROR HEATER button. DISPLAY CHART Sensor Item Displayed Value 1 Mode Positioning BIT 2 In-car Temperature °C 3 Outside Air Temperature °C 4 Solar Radiation Sensor Value: Dark = 00, Flashlight = 04, Cloudy = 10, Sunny = 65 10kcal/m 2 -h 5 Evaporator Outlet Air Temperature °C 6 Air Mix Opening (Low value indicates cooler air distribution, higher value indicates warmer air distribution) % of opening 7 Vehicle speed (Vehicle must be driven to display speed) 10km/h 8 Engine Coolant Temperature °C 9 Target Vent Temperature Air Out (TAO) °C A Humidity Sensor Value % b Illumination duty Step C Software version - NOTE: The mode positioning will be displayed by BIT. Check the mode motor positioning by using the mode motor code information. The sensor values will be displayed in degrees Celsius (°C) or an alphanumeric code. Use the chart to convert the value to degrees Fahrenheit (°F). If the sensor value displays "Er" this indicates there is an open or short in the circuit or sensor. Check for DTCs using the HDS, or refer to checking DTCs by DTC indication to check for DTCs. If necessary, compare the sensor input display to a like, known-good vehicle under the same test conditions. If the sensor is out of the normal range, refer to the sensor test or substitute a known-good sensor, and recheck. Target vent temperature air out (TAO) is the value calculated by the climate control unit. It is determined by the conditions of the TEMP DIAL position, the outside air temperature, the in-car temperature, and the solar radiation.
5. To cancel the sensor input display mode, press the AUTO button or turn the ignition switch to LOCK (0).

Celsius to Fahrenheit Conversion Table

FAHRENHEIT CONVERSION CHART

FAHRENHEIT CONVERSION CHART

Alphanumeric Conversion Table

ALPHANUMERIC CONVERSION CHART

Mode Motor Code Information

Code information on the mode motor is displayed by combining regulated segments.

Scheme 138

MODE MOTOR CODE SIGNAL REFERENCE

Oil Separator

Oil emission from the A/C compressor to the A/C line is reduced by placing the oil separator in the A/C compressor. This results in a thinner oil film inside of the heat exchangers (A/C condenser and evaporator). Air conditioning efficiency is increased without sacrificing engine performance.

Scheme 139

Scheme 140

Scheme 141

Air Conditioning System Control in the ECON ON Mode

At outside temperatures of 73 °F (23 °C) or higher in the ECON ON Mode, the air conditioning system controls the following functions to reduce power consumption.

Switching to Recirculation Mode

Compared to outside air intake, the recirculation of air inside the vehicle reduces A/C compressor operation frequency and air volume.

Reduced air volume

Compared to the ECON OFF Mode, fan electric operation is suppressed and power consumption is reduced.

Scheme 142

Conditions that prevent the ECON ON Mode

The air conditioning system does not control ECON ON Mode under the following conditions.

1. When the driver selects MAX HOT or MAX COOL.
2. Outside air temperature is less than 73 °F (23 °C).
3. When the driver selects A/C OFF mode.
4. When the mode position is not in VENT or HEAT/VENT.
5. Outside air temperature sensor malfunction.
6. Evaporator temperature sensor malfunction.
7. Climate control unit lost communication with gauge control module (VSP/NE message).

Conditions that cancel the ECON ON Mode

The air conditioning system cancels ECON ON Mode under the following condition.

1. When the driver selects MAX HOT or MAX COOL.
2. Outside air temperature is less than 73 °F (23 °C).
3. When the driver selects A/C OFF mode.
4. When the mode position get in the positions other than VENT and HEAT/VENT.
5. When the driver selects FRESH mode manually.
6. Outside air temperature sensor malfunction.
7. Evaporator temperature sensor malfunction.
8. Climate control unit lost communication with gauge control module (VSP/NE message).

Auto Idle Stop System Control (A/C: Air Conditioning)

The climate control unit calculates the duration of the auto idle stop while the vehicle is stopped based on sensor inputs with consideration for the passenger's comfort and visibility.

Passenger's comfort

The duration of the auto idle stop is the time when the passengers do not feel a sudden change of the in-car temperature and humidity.

Visibility

To avoid windows fogging, the climate control unit disables the auto idle stop when it determines that the windows are likely to be fogged, based on the humidity sensor value and the drive signal input from the wiper. The calculation of the duration of the auto idle stop varies between ECON OFF Mode and ECON ON Mode. In ECON ON Mode, the climate control unit considers only visibility (prevention of window fogging). In ECON OFF Mode, the unit also considers the comfortable environment inside the vehicle. ECON ON Mode can extend the duration of the auto idle stop, which can improve fuel economy.

When the windows get fogged during auto idle stop, the engine restarts when DEF mode is turned on ('11 model).

If the climate control unit detects a sensor malfunction, or if the PCM detect a problem with the communication line to the climate control unit during A/C use, auto idle stop is disabled, and the IMA indicator comes on to alert the driver of the problem. The climate control unit may disable auto idle stop under other conditions as well. For more information, refer to the IMA section.

How a comfortable in-car environment is determined

In ECON OFF Mode, the climate control unit calculates the upper and lower limits for a comfortable in-car temperature, keeping the A/C stable to avoid abrupt changes. Auto idle stop is disabled when the upper or lower limits are exceeded. In ECON ON Mode, the priority is not the in-car environment; it is in keeping auto idle stop enable as long as possible.

How window fogging is determined

The climate control unit estimates the temperature on the window, based on the outside air temperature, the vehicle speed, and the in-car temperature and humidity, then calculates a threshold for window fogging. According to this threshold, the climate control unit determines that the window is likely to be fogged, or will not fog, then calculates the duration of auto idle stop.

Shortening of the auto idle stop duration

The climate control unit determines that the humidity will rise, based on the humidity sensor value and the drive signal input from the wipers, and shortens the duration of the auto idle stop.

Auto Idle Stop Disable Conditions ('10 model)

The air conditioning system disables auto idle stop under any one of the following conditions. But the climate control unit enables auto idle stop when the blower motor is off.

1. Outside air temperature is less than -4 °F (-20 °C)
2. Outside air temperature sensor malfunction
3. Humidity sensor malfunction
4. Evaporator temperature sensor malfunction
5. Climate control unit lost communication with gauge control module (coolant temp message)
6. Climate control unit lost communication with gauge control module (VSP/NE message)
7. Climate control unit malfunction

When the blower fan is in operation, the system applies the following conditions also.

1. When the duration of auto idle stop is less than 10 second
2. When the driver selects DEF mode or HEAT/DEF mode manually
3. When humidity in the car exceeds the upper limit of the permissible value that the climate control unit calculated
4. When the mode position is in VENT or HEAT/VENT
5. When the driver selects MAX COOL
6. When the fan operates at the specified voltage of the terminal of the blower fan(*1) (FAN auto mode: 7 V or more/FAN manual mode: 8 V or more)
7. When the mode position is in HEAT
8. When the engine coolant temperature is less than the specified value(ECON ON Mode: Less than 113 °F (45 °C)(*2)/ECON OFF Mode: Less than 158 °F (70 °C))
9. Outside air temperature is less than 28 °F (-2 °C)(*3)
10. When the driver selects MAX HOT(*2)

(*1): A/C ON and ECON OFF Mode

(*2): Wiper OFF

(*3): ECON OFF Mode and Wiper OFF

Auto Idle Stop Disable Conditions ('11 model)

The air conditioning system disables auto idle stop under any one of the following conditions. But the climate control unit enables auto idle stop when the blower motor is off.

1. Outside air temperature sensor malfunction
2. Humidity sensor malfunction
3. Evaporator temperature sensor malfunction
4. Climate control unit lost communication with gauge control module (coolant temp message)
5. Climate control unit lost communication with gauge control module (VSP/NE message)
6. Climate control unit malfunction

When the blower fan is in operation, the system applies the following conditions also.

1. When the duration of auto idle stop is less than 10 second
2. When the driver selects DEF mode manually
3. When humidity in the car exceeds the upper limit of the permissible value that the climate control unit calculated
4. Outside air temperature is less than -4 °F (-20 °C)
5. When the mode position is in VENT or HEAT/VENT
6. When the driver selects MAX COOL(*1)
7. When the fan operates at the specified voltage of the terminal of the blower fan (*2)(FAN auto mode: 7 V or more/FAN manual mode: 8 V or more)
8. When the mode position is in HEAT or HEAT/DEF
9. When the engine coolant temperature is less than the specified value (ECON ON Mode: Less than 113 °F (45 °C)(*3)/ECON OFF Mode: Less than 158 °F (70 °C))
10. Outside air temperature is less than 28 °F (-2 °C)(*4)
11. When the driver selects MAX HOT
12. When the fan operates at the specified voltage of the terminal of the blower fan (*4)(8 V or more)

(*1): A/C ON

(*2): A/C ON and ECON OFF Mode

(*3): Wiper OFF

(*4): ECON OFF Mode

Dual Construction A/C Pipe

The A/C pipe unit installed between the engine compartment and the evaporator is the dual construction type.

The discharge pipe (high pressure) is built inside the suction pipe (low pressure).

This design is effective for lowering refrigerant temperatures in the discharge pipe, which helps to improve cooling performance.

Scheme 143

A/C Pressure Sensor

The A/C pressure sensor converts A/C pressure into electrical signals to the PCM.

SYSTEM OPERATION CHART

The response of the A/C pressure sensor is shown in the graph.

Scheme 144

HDS PGM Fl Data List Informatio's it relates to A/C)

The A/C system data that can be monitored to HDS PGM-FI Data List.

DATA LIST REFERENCE

Humidity/In-car Temperature Sensor

The humidity sensor consists of two sensors. One detects humidity and the other detects in-car temperature. When the climate control unit receives the signals of the in-car condition from the humidity sensor, and judges that the humidity in the vehicle is very low, the climate control unit controls the compressor to reduce engine power loss.

Scheme 145

Humidity/In-car Temperature Sensor Quality

The resistance of the humidity sensor changes by the adsorption and the evaporation of moisture. The resistance change of the humidity sensor changes the output voltage.

Scheme 146

Scheme 147

36P CONNECTOR

CONNECTOR TERMINAL REFERENCE

Scheme 148

5P CONNECTOR

CONNECTOR TERMINAL REFERENCE

Scheme 149

Scheme 150

Refrigerant Leak Check

Special Tools Required

1. Leak Detector YGK-H-10PM*
2. Leak Detector HLD-100*
3. Leak Detector TIFZX-1*
4. Available through the Honda Tool and Equipment Program 888-424-6857

Note. If accidental system discharge occurs, ventilate the work area before resuming service. Additional health and safety information may be obtained from the refrigerant and lubricant manufacturers. Check the system for leaks using an R-134a refrigerant leak detector with an accuracy of 14 g (0.5 oz) per year or better

Leak Detector Usage Tips (Refer to the Operator's Manual for complete operating instructions)

1. Position the vehicle in a wind-free work area. This will aid in detecting small leaks.
2. When using the leak detector for the first time, allow it to warm up for 2 minutes with the probe in a clean atmosphere. This lets the temperature sensor in the detector stabilize.
3. The calibration check should be done in the "Search 2" mode. Once that is done, the other check modes do not need calibrating.
4. When leak checking through the HVAC module drain hose, avoid drawing water into the probe. Water can damage the internal pump and sensor.
5. Avoid creasing the flexible probe extension. Creases can restrict air flow and give false readings.
6. Because the detector recalibrates itself for ambient gases, it may be necessary to move the detector away from the leak to clear the sensor. Once the sensor has cleared, recheck the suspected leak.
7. When removing the clear probe tip, be careful not to lose the flow ball.
8. R-134a is heavier than air, always check below and to the sides of all potential leak sources.
9. Halogen leak detectors are sensitive to chemicals: windshield washing solutions, solvents/cleaners, and some vehicle adhesives. Keep these chemicals out of the area when doing leak detection.

Fluorescent Dye Usage Tips

1. Use only Tracer-Stick signal dose fluorescent dye capsules from Tracerline®. Other dyes contain solvents that may contaminate the refrigerant oil, leading to component failure.
2. Adding excessive amounts of dye can damage the compressor.
3. PAG oil is water soluble, so condensation on the evaporator core or the refrigerant lines may wash the PAG oil and fluorescent dye away from the actual leak. Condensation may also carry dye through the HVAC module drain.
4. After checking and repairing leaks, thoroughly clean any residual dye from the areas where leaks were found. Use GLO-AWAY dye cleaner, from Tracerline®, and hot water to remove the dye (follow the instructions on the bottle). Residual dye stains can cause misdiagnosis of any future A/C system leaks.
5. If any refrigerant dye contacts an exterior paint surface, remove it by doing this

1. Carefully wash the affected surfaces to remove any dirt, and to prevent paint scratching.
2. Mix water and isopropyl alcohol in a 50/50 mixture. Soak a soft 100 percent cotton towel with the water/alcohol mixture, and place the cloth on the affected areas to remove the dye.
3. After removing the dye with the water/alcohol-soaked cloth, carefully wash the affected areas, and check that there is no remaining dye.

Scheme 151

1. Connect an R-134a refrigerant recovery/recycling/charging station (A) to the high-pressure service port (B) and the low-Connect an R-134a refrigerant recovery/recycling/charging station (A) to the high-pressure service port(B) and the low-pressure service port (C), as shown, following the equipment manufacturer's instructions.
2. Recover refrigerant from the A/C system (see «RECEIVER/DRYER DESICCANT REPLACEMENT»(ref-360275-S27565743102010042800000) ), and evacuate the system (see «SYSTEM EVACUATION»(ref-360275-S27354209942010042800000) ). If the system achieves a vacuum of approximately 93.3 kPa (700 mmHg, 27.6 in.Hg) in 15 minutes, and holds the vacuum for 15 minutes, then the system dose not have a leak at this time. If the system cannot achieve or hold a vacuum, continue the refrigerant leak check.
3. Open the high pressure valve to charge the system to the specified capacity. Select the appropriate units of measure for your refrigerant charging station. Refrigerant Capacity: 450 to 500 g 0.45 to 0.50 kg 0.99 to 1.10 lbs 15.8 to 17.6 oz
4. With the engine OFF, use a halogen leak detector first to detect the leak source. Follow a continuous path in order to ensure that you will not miss any possible leaks. Test the following areas of system for leaks. DIAGNOSTIC PROCEDURE CHART Possible Leak Area Diagnostic Procedure with the Leak Detector Notes Service Ports Check the service ports with the detector. If the detector "sniffs" leak, use fluorescent dye to confirm it. When capping the service ports, ensure that the seals on the port caps are in place, and that the caps are tight. The caps are used as the final seals in the system. Condenser If the detector "sniffs" a leak, use fluorescent dye to confirm it. Check for joints or connections coated with oily dust. Check for damaged and corroded areas. Check all fittings, couplings, brazed/welded areas and areas around attachment points. Move the probe slowly (1 inch/second or less), and keep it within 1/4 inch of the component being checked. This maximizes the chance of detecting a leak. If you detected a leak, blow compressed air over the area, then recheck for leaks. For large leaks, clearing the area with compressed air may help you pinpoint the leak source. Evaporator Check at the evaporator drain tube. Check at the pass vent and turn blower on low speed. A/C Lines (Low pressure side) Wiggle the hose when checking crimped metal ends on rubber hoses. If the detector "sniffs" a leak, use fluorescent dye to confirm it. Check all fittings, couplings, pressure switches, brazed/welded areas, and areas around attachment points on A/C lines and components. Check for damaged and corroded areas. Move the probe slowly (1 inch/second or less), and keep it within 1/4 inch of the component being checked. This maximizes the chance of detecting a leak.
5. Close the quick coupler valves, then disconnect the quick couplers from the vehicle service ports.
6. Attach the universal connect set, from the Optimax Jr. Leak Detection Kit, to the service valve fitting. Close the control valve (the black knob on the connect set).
7. Attach the charging station low pressure hose quick coupler to the service valve fitting, and open the quick coupler valve. Evacuate the connect set using the charging station vacuum pump, then close the quick coupler valve.
8. Detach the universal connect set, and install a Tracer-Stick® dye capsule between the connect set and the service valve fitting (see the manufacturer's instructions for more detail).
9. Attach the quick coupler on the universal connect set to the low pressure service port on the vehicle. Open the charging station low pressure hose quick coupler valve, but do not open the control valve.
10. Start the engine, and set the A/C system to maximum cooling. Open the control valve to let refrigerant and the dye enter the A/C system through the low pressure service port. Close the control valve when the Tracer-Stick® dye capsule is empty.
11. Run the engine and A/C system for 15 minutes to thoroughly circulate the dye. Then shut the engine off, and inspect the following areas of the system for leaks. NOTE: Check for leaks in a dark work area, and use the UV light and the special glasses from the leak check kit. Other UV lights may not work well with the Tracer-Stick® dye. Small leaks may take up to 1 week of vehicle operation (with normal A/C use) to become visible. DIAGNOSTIC PROCEDURE CHART Possible Leak Area Diagnostic Procedure with Fluorescent Dye Service Ports If a leak is found, replace the Schrader valve on the service port. A/C Lines Use a permanent marker pen to circle the leak area. If a leak is found, remove and replace the A/C line (see «A/C LINE REPLACEMENT»(ref-360275-S07471342632010042800000) ). Condenser If a leak is found, remove the A/C condenser (see «A/C COMPRESSOR RELIEF VALVE REPLACEMENT»(ref-360275-S38425931112010042800000) ). Determine whether leak is in the condenser or the receiver/dryer. Use a permanent marker pen to circle the leak area. Replace either the receiver/dryer (see «RECEIVER/DRYER DESICCANT REPLACEMENT»(ref-360275-S27565743102010042800000) ), or the A/C condenser (see «A/C COMPRESSOR RELIEF VALVE REPLACEMENT»(ref-360275-S38425931112010042800000) ), depending upon which is leaking. A/C Compressor Check for leaks at all of the compressor joints, the clutch center, the compressor front housing bolts, and the scroll bolts on the back of the compressor. If a leak is found, use a permanent marker pen to circle the leak area. If the compressor relief valve appears to be leaking, determine whether the leak is coming from the relief valve, or the joint between the compressor casing and the valve. If the leak is from the relief valve, check the A/C system pressures, and refer to the pressure test in the A/C System Test (see «A/C SYSTEM TEST»(ref-360275-S16287385522010042800000) ). If the leak is from the casing/valve joint, replace the A/C compressor relief valve (see «A/C COMPRESSOR RELIEF VALVE REPLACEMENT»(ref-360275-S38425931112010042800000) ). If the leak is coming from the suction hose and/or discharge hose fittings on the compressor, clean the A/C fittings and replace the suction/discharge fitting O-rings. For all other compressor leaks, remove and replace the A/C compressor (see «A/C COMPRESSOR REPLACEMENT»(ref-360275-S30614450132010042800000) ). Evaporator Start checking for evaporator leaks by illuminating the evaporator drain tube area. If a leak is found, remove the evaporator core (see «EVAPORATOR CORE REPLACEMENT»(ref-360275-S14282158132010042800000) ). Determine whether leak is from evaporator or expansion valve. Use a permanent marker pen to circle the leak area. Replace the expansion valve (see «EXPANSION VALVE REPLACEMENT»(ref-360275-S10200905092010042800000) ), or the evaporator core (see «EVAPORATOR CORE REPLACEMENT»(ref-360275-S14282158132010042800000) ), depending upon which is leaking.

Refrigerant Recovery

Note. If accidental system discharge occurs, ventilate the work area before resuming service. Additional health and safety information may be obtained from the refrigerant and lubricant manufacturers.

Scheme 152

1. Connect an R-134a refrigerant recovery/recycling/charging station (A) to the high-pressure service port (B) and the low-pressure service port (C), as shown, following the equipment manufacture's instructions.
2. Measure the amount of refrigerant oil removed from the A/C system after the recovery process is completed. Be sure to put the same amount of new refrigerant oil back into the A/C system before charging. NOTE: Use only SANDEN SP-10 refrigerant oil. Using the wrong refrigerant oil can be a safety hazard (see «A/C SERVICE TIPS AND PRECAUTIONS»(ref-360275-S36564926332010042800000) ).

System Evacuation

Use only service equipment for refrigerant HFC-134a (R-134a).

Note. If accidental system discharge occurs, ventilate the work area before resuming service. Additional health and safety information may be obtained from the refrigerant and lubricant manufacturers. Do not allow moisture to contaminate the A/C system oil. Moisture in the oil is difficult to remove, and it can damage the A/C compressor. Using a compact electronic vacuum gauge may decrease the required evacuation time because you can measure actual moisture level with this tool.

A more efficient way to measure moisture removal is with a special tool called a compact electronic vacuum gauge, measuring vacuum levels in microns.

Connect the tool according to the manufacturers instructions, and allow the vacuum pump to run until the gauge reads 500 microns.

Shut off and isolate the vacuum pump, then observe the gauge reading

1. If the vacuum level remains stable for at least 3 minutes, all moisture in the system has been removed.
2. A slow increase in the micron reading means there is still moisture boiling out of the system. Restart the vacuum pump and continue evacuating.
3. A quick increase of micron levels indicates a leak is present in the system or your service equipment. Determine the cause and correct the leak before continuing.

Scheme 153

1. When an A/C system has been opened to the atmosphere, such as during installation or repair, it must be evacuated using an R-134a refrigerant recovery/recycling/charging station. If the system has been open for several days, the receiver/dryer should be replaced, and the system should be evacuated for several hours.
2. Connect an R-134a refrigerant recovery/recycling/charging station (A) to the high-pressure service port (B) and the low-pressure service port (C), as shown, following the equipment manufacturer's instructions. Recover the refrigerant, if any, from the A/C system (see «REFRIGERANT RECOVERY»(ref-360275-S30991298702010042800000) ).
3. Evacuate the system. The vacuum pump should run for a minimum of 30 minutes to eliminate all moisture from the system. When the suction gauge reads -93.3 kPa (-700 mmHg, -27.55 inHg) for at least 30 minutes, close all valves, and turn off the vacuum pump.
4. If the low-pressure does not reach more than 93.3 kPa (700 mmHg, 27.6 in.Hg) in 15 minutes, there is probably a leak in the system. Partially charge the system, and check for leaks (see «REFRIGERANT LEAK CHECK»(ref-360275-S34970898202010042800000) ).

System Charging

1. If accidental system discharge occurs, ventilate the work area before resuming service.
2. Additional health and safety information may be obtained from the refrigerant and lubricant manufacturers.

Scheme 154

1. Connect an R-134a refrigerant recovery/recycling/charging station (A) to the high-pressure service port (B) and the low-pressure service port (C), as shown, following the equipment manufacturer's instructions.
2. Recover the refrigerant in the A/C system (see «REFRIGERANT RECOVERY»(ref-360275-S30991298702010042800000) ).
3. Evacuate the system (see «SYSTEM EVACUATION»(ref-360275-S27354209942010042800000) ). If the system cannot reach a vacuum of-93.3 kPa (-700 mmHg, -27.55 inHg) in 15 minutes, or cannot hold a vacuum for at least 15 minutes, there is probably a large leak. Do the refrigerant leak check (see «REFRIGERANT LEAK CHECK»(ref-360275-S34970898202010042800000) ), and repair any leaks before charging the system.
4. Add the same amount of new refrigerant oil to the system that was removed during recovery. Use only SP-10 refrigerant oil.
5. Charge the system with the specified amount of R-134a refrigerant. Do not overcharge the system; the compressor will be damaged. Select the appropriate units of measure for your refrigerant charging station. Refrigerant Capacity: 450 to 500 g 0.45 to 0.50 kg 0.99 to 1.10 lbs 15.8 to 17.6 oz
6. Check for refrigerant leaks (see «REFRIGERANT LEAK CHECK»(ref-360275-S34970898202010042800000) ).
7. Check for system performance (see «A/C SYSTEM TEST»(ref-360275-S16287385522010042800000) ).