Protect Air Conditioning Circuit And Components From Moisture When Carrying Out Repair Work - AH83.30-P-0005-01KOA
Model all (4xWD, CAR)
Model 414, 415, 420, 447, 448, 470, 471, 636, 638, 639
Model 450, 451, 452, 453, 454
Model 667, 668, 670
Model 690, 900, 901, 902, 903 (except 903.662), 904, 905, 906, 907, 909, 910
Model 903.662
except code Z29 (James Cook touring camper, NAFTA)
except code ZU8 (National version for USA)
Do not carry out any repair operations on the refrigerant circuit in the A/C when outdoors in humid weather.
Otherwise, moisture in the refrigerant circuit reduces the cooling output of the air conditioning system and leads to damage to components.
When refrigerant lines are cut or disconnected, all connection openings must immediately be sealed using suitable air-tight stop plugs.
Moisture or dirt in the refrigerant circuit reduces the cooling output of the air conditioning system and leads to damage to components.
The separating points of the refrigeration circuit to the vehicle interior require an increased level of care and awareness during evaluation, mounting and checking.
The refrigerant reservoir, receiver drier or collector must be changed if:
- The refrigerant circuit was opened and the vehicle is older than 5 years (cars, vans, GW, buses).
- The refrigerant circuit was opened (truck).
- The refrigerant has a dark gray to black discoloration.
- The refrigerant compressor has seized.
- The refrigerant circuit has been damaged following an accident.
All replacement parts must be stored dry and sealed. The stop plugs in new components should only be removed immediately prior to installation.
The packaging of the receiver drier must be checked for damage. Receiver driers with damaged packaging must be disposed of. The receiver drier must be installed no more than 20 min after the packaging is opened.
Further protection against moisture is provided by carefully evacuating the air conditioning system following repair operations. By generating a vacuum in the refrigerant circuit, the evacuation process removes any moisture that might have entered the system.