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Home >> Mercedes Benz >> 2016 >> GLE300d >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Climate Control - 166 Chassis - 1 Of 2 >> Testing & Repair >> Check Air Conditioning System For Leakage - AR83.30-P-1761GQ

Check Air Conditioning System For Leakage - AR83.30-P-1761GQ

MODEL 166.0/8, 292 

MODIFICATION NOTES

05.10.2016 Safety note added   AS83.00-Z-0006-01A 
05.10.2016 Safety note added   AS83.00-Z-0001-02A 
05.10.2016 Test method changed Operation step 2, 3  
13.09.2016 Gas detection unit added   WS47.00-P-0019B
13.09.2016 Leak tester added   WS83.00-P-0035B
13.09.2016 Air conditioning service unit R1234yf added   WS83.00-P-0034B
13.09.2016 General note added   AH83.30-P-0003-02A 
13.09.2016 Safety note added   AS83.00-Z-0007-01A 
  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 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. Model 166.0/8, 292 except code 2U8 (Alternative refrigerant)
AS83.00-Z-0006-01A 
  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. Model 166.0/8, 292 with code 2U8 (Alternative refrigerant)
AS83.00-Z-0007-01A 
  Risk of accident  from vehicle starting off by itself when engine running. Risk of injury  (bruises and burns) resulting from working on the engine while it is being started or when it is running. Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts. AS00.00-Z-0005-01A
NOTES Protect air conditioning circuit and components from moisture when carrying out repair work   AH83.30-P-0005-01A 
NOTES Procedure for a damaged or leaky air conditioning system   AH83.30-N-0004-01A 
IMPORTANT Notes on handling refrigerant R1234yf Model 166.0/8, 292 with code 2U8 (Alternative refrigerant) AH83.30-P-0003-02A 
IMPORTANT Notes on handling refrigerant R134a Model 166.0/8, 292 except code 2U8 (Alternative refrigerant) AH83.30-N-0003-01A 
INSPECT Check     
1 Evacuate air conditioning system   AR83.30-P-1760CW 
2
REFER TO SPECIAL TOOLS
Charge the high- and low-pressure sides of the air conditioning system with forming gas when the engine is cold to a system pressure of 15 bar
000 588 19 21 00 leak tester
IMPORTANT The system pressure must be maintained for at least 4 h.
IMPORTANT The leak tester operator's manual must be observed.
IMPORTANT Temperature changes during the pressure test can cause pressure surges, e. g. due to weather changes, transition from day to night, cooling down of engine compartment.
Ensure that the ambient conditions are identical.
WS83.00-P-0035B
3 Check refrigerant circuit of air conditioning system for leaks using gas detection unit If a pressure drop is determined.
If a leak is detected in the refrigerant circuit

Drain forming gas and replace damaged refrigerant circuit components.
WS47.00-P-0019B
REFER TO SPECIAL TOOLS 000 588 03 21 00 Gas detector If no leak is detected in the refrigerant circuit

Drain the forming gas and check evaporator for leaktightness, replace if necessary.
AR83.30-P-5550Q
  Filling     
4 Evacuate the air conditioning system, refill it, and then check the system to make sure that it functions correctly and does not leak   AR83.30-P-1760CW