Introduction
This brochure describes the checking of the Omega - B air conditioning system.
There is a detailed description of the air conditioning system in the "New Technical Features, Omega - B" brochure.
The Opel / Vauxhall Checking System
The "Opel / Vauxhall Checking System", a technical testing system developed by Opel / Vauxhall, has pointed the way for the entire automobile industry.
Fast and precise diagnosis of the air conditioning is possible using the Service Station, the Leak Detector, Multimeter MKM - 587 - A, Gauge MKM - 596 and Electronic - Kit I KM - 609.
General Instructions
Prerequisites for checking the air conditioning system according to the checking program:
· Incorrect operation of the air conditioning must not be the cause of the complaint.
· During the check, the battery must be in good condition and adequately charged. (Battery voltage greater than 11.5 V).
· Pipes, hoses and individual aggregates may only be installed if the connection parts are in good condition.
· In order to equalize temperatures and prevent moisture condensing, ensure that parts that are being installed are at room temperature.
· Closure caps (plugs) may only be removed immediately before installation.
· Connection parts without closure caps and parts which have been exposed to dirt, grease or moisture must not be installed.
· The receiver - dryer must not be connected until all other parts of the system have been connected.
· Always use new O - rings (dark green).
· Before assembly, O - rings and all pipe and hose connection joints must be coated with special mineral oil (from the Parts and Accessories Department).
· In order to avoid twisting and kinking at the connection, the stationary part must be counterheld with a suitable tool when tightening.
· Connections may only be tightened to the prescribed torque.
· A completely or partially assembled system must not be left unsealed for any longer than is absolutely necessary.
· After repairs on components of the refrigerant circuit, connections must always be checked for leaks using a leak detector.
· Measure the amount of compressor lubricant in the replaced component.
On replacement, fill this amount of lubricant into the new component.
· Do not change the basic adjustment of the thermostatically controlled expansion valve.
Important: After reconnecting the battery, volatile memories must be reprogrammed.
With radio coding, inform the customer about the decoding.
Abbrevations
BL = Blue
BR = Brown
BRBL = Brown / Blue
BRGE = Brown / Yellow
BRGN = Brown / Green
BRSW = Brown / Black
BRWS = Brown / White
GE = Yellow
GN = Green
GR = Grey
GRGE = Grey / Yellow
RTBL = Red / Blue
RTSW = Red / Black
RTWS = Red / White
SW = Black
SWBL = Black / Blue
SWGR = Black / Grey
SWWS = Black / White
WS = White
Safety Measures
· When performing work where there is a danger of a short circuit, disconnect the ground cable from the battery.
· When carrying out function checks in the heating, ventilation or air conditioning, do not reach into the mechanical parts of the heating or air conditioning system.
· Special safety measures should be observed when working with refrigerant.
· Ensure that the working area is well ventilated.
· Refrigerants must not be allowed to come into contact with flames or incandescent materials (e. g. during welding operations).
· Toxic chemical compounds are formed if refrigerants are sucked in by the engine.
· Protect the eyes against liquid refrigerant by wearing goggles (if refrigerant evaporates under atmospheric pressure, it freezes the tissues with which it comes into contact).
· Protect the skin against contact with refrigerant. Wear gloves with sleeves if necessary.
· If refrigerant comes into contact with the eyes, do not rub.
· Rinse eyes or other affected part for several minutes using plenty of cold water and then seek medical attention as soon as possible.
· Protect refrigerant bottles from direct heat. Never heat refrigerant bottles above 50 °C / 122 °F.
If the refrigerant bottle is placed in a direct source of heat, the pressure forced by the increase in temperature can cause the safety plugs to come out or the bottle to burst. Therefore, never use open flames (e. g. welding torches), heaters or ovens to heat refrigerant bottles.
· On vehicles with air conditioning, dewaxing or cleaning of the engine with steam jets must be carried out only with the greatest caution. Air conditioning components must not be struck directly by the steam jet. The same precautions apply analogously for welding operations.
· Refrigerant bottles must never be completely filled, to leave room for the liquid to expand when heated.
· For painting operations, the air conditioning must be bled beforehand if the vehicle is to stay longer than 20 minutes at 80 °C / 176 °F in the drying oven.
· Refillable steel refrigerant bottles are to be immediately sealed when no longer in use. Seal the cut - off valve, which has a safety plug, with a screw cap to protect these parts from damage.
· For safety reasons, opened throw - away bottles should be completely emptied into the evacuating / charging station.
· Do not perform operations on the refrigerant circuit from an inspection pit. Gaseous refrigerant is heavier than air and can collect in inspection pits at high concentration levels.
· When disconnecting Service hoses, do not point quick - release catches towards the body - the remaining refrigerant may flow out.