Air Conditioning System: Precaution

WARNING: This page is about a different car, the 2008 Lexus LS 600hL. However, it is still accessible from the selected car via links, so may be relevant.

PRECAUTIONS WHEN USING INTELLIGENT TESTER OR TECHSTREAM
1. When using the intelligent tester or Techstream to troubleshoot the LIN communication line: Connect the intelligent tester or Techstream to the vehicle, and turn a courtesy light switch on and off at 1.5 second intervals until communication between the tester and vehicle begins.
2. After all DTCs are cleared, check if the trouble occurs again 6 seconds after the power switch is turned ON (IG).
NOTICES FOR HYBRID SYSTEM ACTIVATION
- When the warning light is illuminated or the battery has been disconnected and reconnected, pressing the power switch may not start the system on the first try. If so, press the power switch again.
- With the power switch ON (IG), disconnect the battery If the key is not in the vehicle interior during reconnection, DTC B2799 may be output.
BECAUSE COMPRESSOR HAS HIGH-VOLTAGE CIRCUIT, WEAR INSULATED GLOVES AND PULL OUT SERVICE PLUG TO CUT HIGH-VOLTAGE CIRCUIT BEFORE INSPECTION
DO NOT HANDLE REFRIGERANT IN AN ENCLOSED AREA OR NEAR AN OPEN FLAME
ALWAYS WEAR EYE PROTECTION

Fig 1: Precaution Do Not Handle Refrigerant In Enclosed Area
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
BE CAREFUL NOT TO GET LIQUID REFRIGERANT IN YOUR EYES OR ON YOUR SKIN
If liquid refrigerant gets in your eyes or on your skin:
1. Wash the area with lots of cold water.
  CAUTION: Do not rub your eyes or skin.
2. Apply clean petroleum jelly to the skin.
3. Go immediately to a hospital or see a physician for professional treatment.
NEVER HEAT CONTAINER OR EXPOSE IT TO NAKED FLAME
BE CAREFUL NOT TO DROP CONTAINER OR APPLY PHYSICAL SHOCKS TO IT

Fig 2: Precaution For Be Careful Not To Get Liquid Refrigerant In Your Eyes
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
DO NOT OPERATE COMPRESSOR WITHOUT ENOUGH REFRIGERANT IN REFRIGERANT SYSTEM
If there is not enough refrigerant in the refrigerant system, oil lubrication will be insufficient and compressor burnout may occur. Necessary care should be taken to avoid this.
DO NOT OPEN HIGH PRESSURE MANIFOLD VALVE WHILE COMPRESSOR IS OPERATING
Open and close only the low pressure valve. If the high pressure valves are opened, refrigerant flows in the reverse direction causing the charging cylinder to rupture

Fig 3: Precaution Do Not Open High Pressure Manifold Valve While Compressor Operating
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
BE CAREFUL NOT TO OVERCHARGE SYSTEM WITH REFRIGERANT
If refrigerant is overcharged, it causes problems such as insufficient cooling, poor fuel economy, engine overheating, etc.
PRECAUTIONS TO BE OBSERVED WHILE SERVICING
CAUTION: Wear insulated gloves and pull out the service plug grip before inspection, as some of the procedures require disconnecting the high-voltage connectors.
NOTE:
- For the electric inverter compressor, use ND-OIL 11.
- Electrical insulation performance may decrease significantly if even a small amount of oil other than ND-OIL 11 is used or enters the refrigeration cycle, causing a DTC to be output.
- Replace the main components (evaporator, condenser, and compressor) if a large amount of oil other than ND-OIL 11 enters the system. Failing to do so may cause electrical insulation performance to remain low, causing a DTC to be output.