Check Air Conditioning System For Leakage - AR83.30-S-1761E

Model 447 With Code HH4 (THERMOTRONIC automatic climate control) 

Model 447 With Code HH9 (Air conditioner, automatic heater control) 

Model 447 With Code HZ7 (TEMPMATIC semi-automatic air conditioning in rear) 

Model 448 

	Risk of death  when working on component parts and systems with U >= 30 V alternating voltage (AC) or U >= 60 V direct voltage (DC)	Do not touch damaged or defective live component parts and lines or non-insulated electrical connections and lines. Model 447 with engine 780	AS00.00-Z-0035-01A
	Risk of explosion  when using a forming gas with incorrect mixing ratio. Risk of suffocation due to inhalation of forming gas. Risk of injury due to bursting of high-pressure hoses.	Wear safety glasses and protective gloves. No smoking or open flames. Work in well-ventilated rooms only.	AS83.00-Z-0001-02A
	Risk of fire  due to ignition of R1234yf refrigerant on hot components. Risk of poisoning  caused by inhaling overheated refrigerant vapors. Risk of injury  to skin and eyes caused by contact with escaped R1234yf refrigerant and when working on pressurized parts. Risk of explosion due to formation of ignitable refrigerant/air mixtures	Never perform welding work on or near a closed air conditioning system. No smoking or open flames. Wear safety glasses and protective gloves. Work only in well ventilated rooms. Carry out repair work on the air conditioning system circuit only after the system has been evacuated.	AS83.00-Z-0007-01A
	Risk of poisoning  caused by inhaling overheated refrigerant vapors from an air conditioning system containing R134a. Risk of injury  to skin and eyes caused by contact with liquid R134a refrigerant and when working on pressurized parts	Never perform welding work on or near a closed air conditioning system. No smoking or open flames. Wear safety glasses and protective gloves. Work only in well ventilated rooms. Carry out repair work on the air conditioning system circuit only after the system has been evacuated.	AS83.00-Z-0006-01A
Notice	General information on vehicles with high-voltage on-board electrical system and/or lithium-ion battery and/or gaseous-fuel drive system as well as personal protective equipment	Model 447 with engine 780	AH00.00-Z-0300-01A
Notice	Procedure for a damaged or leaky air conditioning system		AH83.30-P-0004-01KOA
	Notes on handling refrigerant R134a		AH83.30-P-0003-01KOA
	Notes on handling refrigerant R1234yf		AH83.30-P-0003-02A
	Check
1	Evacuate air conditioning system.	Model 447 except code HX1 (Refrigerant R-1234yf), Model 448	AR83.30-S-1760E
		Model 447 with code HX1 (R-1234yf refrigerant)	AR83.30-S-1760EF
2	Fill refrigerant circuit with forming gas and check for pressure drop.		WS83.00-P-0035B
	000 588 19 21 00 Leak tester	Temperature changes during the pressure test (e.g. through change in weather or cooling) can cause pressure surges. Consistent ambient conditions must therefore be strictly ensured. Otherwise, the check values will be changed. Observe operating instructions for leak tester. Fill refrigerant circuit with forming gas only when the engine is cold or when the axle drive module is cold. Model 447 with engine 780 Pressure drop in refrigerant circuit filled with test gas	*BE08.50-Z-1001-02KOF
		Model 447 with engine 254, 274, 622, 651, 654, model 448 Pressure drop in refrigerant circuit filled with test gas	*BE83.30-Z-1001-04KOE
3	Determine leakage in refrigerant circuit using gas detection unit.	If no pressure drop was detected.
	000 588 03 21 00 Gas detector	Observe operating instructions for gas detection unit. If leaks are found, ↓ Replace affected component parts of refrigerant circuit.	WS47.00-P-0019B
4	Vent forming gas from refrigerant circuit on leak tester.
5	Fill air conditioning.	Model 447 except code HX1 (Refrigerant R-1234yf), Model 448	AR83.30-S-1760E
		Model 447 with code HX1 (R-1234yf refrigerant)	AR83.30-S-1760EF