Check air conditioning system for leakage

AR83.30-D-1761A

Check air conditioning system for leakage

13.12.2016

Model

900

with code HH9 (Air conditioner, automatic heater control)

except code HK4 (Rear air conditioning, reinforced)

Model

906

with code H08 (Roof-mounted air conditioning system, reinforced)

with code HH9 (Air conditioner, automatic heater control)

except code HH7 (Roof-mounted air conditioning system, basic)

except code HK4 (Rear air conditioning, reinforced)

Model

906

with code HH7 (Roof-mounted air conditioning system, basic)

with code HH9 (Air conditioner, automatic heater control)

except code H08 (Roof-mounted air conditioning system, reinforced)

except code HK4 (Rear air conditioning, reinforced)

Model

906

with code HH9 (Air conditioner, automatic heater control)

except code H08 (Roof-mounted air conditioning system, reinforced)

except code HH7 (Roof-mounted air conditioning system, basic)

except code HK4 (Rear air conditioning, reinforced)

 Danger

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

 Danger

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

 Warning

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

Topical note

Protect air conditioning circuit and components from moisture when carrying out repair work

AH83.30-N-0005-01A

Topical note

Procedure for a damaged or leaky air conditioning system

AH83.30-N-0004-01A

Notes on handling refrigerant R1234yf

AH83.30-P-0003-02A

Notes on handling refrigerant R134a

AH83.30-N-0003-01A



Check

1

Evacuate air conditioning system

Model 906 except code HX1 (R-1234yf refrigerant), model 900

AR83.30-D-1760D

Model 906 with code HX1 (R-1234yf refrigerant)

AR83.30-D-1760DA

2

Fill air conditioning with forming gas and check pressure drop



000 588 19 21 00 Leak tester

WS83.00-P-0035B


Make sure ambient temperatures remain constant.
Otherwise, temperature changes during the pressure test (e.g. caused by a change in the weather or cooling down of the engine compartment over night) may cause pressure fluctuations.

 Do not fill air conditioning system with forming gas unless engine is cold.

 When connecting and when operating the leak tester, the complete work procedure must be conducted in accordance with the operator's manual as issued by the manufacturer.

Pressure drop in refrigerant circuit filled with test gas

*BE83.30-N-1001-04D

If no pressure drop was detected.



Check for leakage on air conditioning system using gas detection unit.



000 588 03 21 00 Gas detector

WS47.00-P-0019B

 Observe operator's manual for gas detection unit.

In the event of leakage



Replace damaged components of the air conditioning system.

3

Evacuate the forming gas in the refrigerant circuit using leak tester

4

Charge air conditioning system

Model 906 except code HX1 (R-1234yf refrigerant), model 900

AR83.30-D-1760D

Model 906 with code HX1 (R-1234yf refrigerant)

AR83.30-D-1760DA

Air conditioning

Number

Designation

Model 900, 906

BE83.30-N-1001-04D

Pressure drop in refrigerant circuit filled with test gas

Test pressure

bar

15

Test period

h

4

Permissible ambient temperature fluctuation

°C

2

Pressure drop

bar

0