Remove and install refrigerant pressure and temperature sensor

AR83.30-S-5431E

Remove and install refrigerant pressure and temperature sensor

12.04.2019

Model

447 with engine 274, 651

with code HH4 (THERMOTRONIC automatic climate control)

Model

447 with engine 274, 651

with code HH9 (Air conditioner, automatic heater control)

Model

448

Modification notes

22.11.2016

Compressor oil changed.

Operation step 5

1

Strut

2

Quick-release coupling

3

Lock

4

Electrical connector

B12

Refrigerant pressure sensor

 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.Typ 447 mit Code HX1 (Kältemittel R-1234yf)

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.Typ 447 außer Code HX1 (Kältemittel R-1234yf), Typ 448

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

Notes on handling refrigerant R1234yf

Typ 447 mit Code HX1 (Kältemittel R-1234yf)

AH83.30-P-0003-02A

Notes on handling refrigerant R134a

Typ 447 außer Code HX1 (Kältemittel R-1234yf), Typ 448

AH83.30-N-0003-01A

 

Remove/install

1

Drain air conditioning system

Model 447 except code HX1 (R-1234yf refrigerant), model 448

AR83.30-S-1760E

Model 447 with code HX1 (R-1234yf refrigerant)

AR83.30-S-1760EF

2

Open quick-release coupling (2)

3

Release lock (3) and remove strut (1) upwards

4

Disconnect electrical connection (4)

5

Unscrew refrigerant pressure sensor (B12)



Compressor oils (specification 362.1)

BB00.40-P-0362-01A

 Installation: Replace sealing ring and moisten with compressor oil.

 Refrigerant pressure sensor to refrigerant condenser or to refrigerant line for refrigerant condenser to refrigerant reservoir

*BA83.30-N-1008-01A

6

Install in the reverse order

 Air conditioning

Number

Designation

Model 447 with engine 274, 651
Model 448 with engine 274

BA83.30-N-1008-01A

Refrigerant pressure sensor to refrigerant condenser or to refrigerant line for refrigerant condenser to refrigerant reservoir

Nm

14