Model | 447 |
with code HH4 (THERMOTRONIC automatic climate control) | |
except code HX1 (Refrigerant R-1234yf) | |
Model | 447 |
with code HH9 (Air conditioner, automatic heater control) | |
except code HX1 (Refrigerant R-1234yf) | |
Model | 447 |
with code HZ7 (TEMPMATIC semi-automatic air conditioning in rear) | |
except code HX1 (Refrigerant R-1234yf) | |
Model | 448 |
Shown on model 447 with engine 651 |
1 | Low pressure connection |
2 | High pressure connection |
S83.30-4593-11
Shown on model 447 with 780.701 engine |
1 | Low pressure connection |
2 | High pressure connection |
S83.30-A008-81
Danger | 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.Typ 447 mit Motor 780.701 | |
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. | |
Topical note | 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 | Typ 447 mit Motor 780.701 | |
Topical note | Procedure for a damaged or leaky air conditioning system | ||
Topical note | Protect air conditioning circuit and components from moisture when carrying out repair work | ||
Notes on handling refrigerant R134a | |||
| Check | ||
1 | Read out Vehicle Documentation (VeDoc) and check code entries. | Model 447 with engine 780.701 | |
The vehicle interior shutoff valve can be installed in the "NO" version or in the "NC" version. | |||
If code OB0 (NO SHUTOFF VALVE) is present in VeDoc, | |||
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remove code OB0 (NO SHUTOFF VALVE). | |||
Codes can only be removed in VeDoc by a user with write permission. | |||
Draining | |||
2 | Remove plugs from refrigerant lines. | ||
3 | Connect low-pressure connection (1) and high-pressure connection (2) of air conditioning service unit to refrigerant lines. | ||
| 000 588 04 82 00 Air conditioning service unit R134a | ||
When connecting and when operating the air conditioning service unit, the complete work procedure must be conducted in accordance with the operator's manual of the manufacturer. | |||
4 | Mount charger. |
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5 | Open vehicle interior shutoff valve using diagnostic system. | Model 447 with engine 780.701 | |
| Connect STAR DIAGNOSIS and read out fault memory | ||
Do not yet remove vehicle diagnosis system. | |||
If vehicle interior shutoff valve cannot be opened using diagnostic system, | |||
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actuate vehicle interior shutoff valve separately with 12 V. | |||
To do so, disconnect electrical connector and use suitable adapter cables for MQS contacts. | |||
Electrical connection kit | |||
6 | Extract refrigerant using air conditioning service unit. | ||
7 | Note down quantity of extracted refrigerant as well as compressor oil. | ||
8 | Replace drier cartridge. |
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MODEL 447 with engine 622 | |||
Model 447 with engine 654 | |||
* Applies to Europe only | |||
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9 | Replace vehicle interior shutoff valve. | * only for Europe and if code OB0 (NO SHUTOFF VALVE) was present in VeDoc. | |
Model 447 with engine 780.701 | |||
Vehicle interior shutoff valve in "NO" version must be replaced by a vehicle interior shutoff valve in "NC" version. | |||
Evacuate | |||
10 | Open vehicle interior shutoff valve using diagnostic system. | Model 447 with engine 780.701 | |
| Connect STAR DIAGNOSIS and read out fault memory | ||
Do not yet remove vehicle diagnosis system. | |||
If vehicle interior shutoff valve cannot be opened using diagnostic system, | |||
| |||
actuate vehicle interior shutoff valve separately with 12 V. | |||
To do so, disconnect electrical connector and use suitable adapter cables for MQS contacts. | |||
Electrical connection kit | |||
11 | Clean refrigerant with air conditioning service unit and evacuate refrigerant circuit. | ||
12 | Conduct vacuum test using air conditioning service unit. | A fault message in the air conditioning service unit is an indication of a leak in the refrigerant circuit. | |
If the air conditioning service unit shows a fault message, | |||
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check air conditioning system for leakage. | |||
Filling | |||
13 | Add new compressor oil to the refrigerant circuit according to the oil filling capacity noted during extraction. | ||
| Compressor oils (specification 362.1) | ||
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The replacement refrigerant compressor is supplied filled with compressor oil. | |||
Model 447 with engine 780.701Additional oil filling capacity after replacing system | |||
Model 447 with engine 274, 622, 651, 654, model 448Additional oil filling capacity after replacing system | |||
Model 447 with engine 780.701Additional quantity of oil to be added when system suddenly looses fluid (e.g. line ruptured) | |||
Model 447 with engine 274, 622, 651, 654, model 448Additional oil filling quantity after sudden emptying of system (e.g. line ruptured) | |||
Model 447 with engine 780.701Additional oil filling quantity after replacement of evaporator (front end) | |||
Model 447 with engine 274, 622, 651, 654, model 448Additional oil filling quantity after replacement of condenser | |||
Model 447 with engine 274, 622, 651, 654, model 448Additional oil filling quantity after replacement of evaporator (front end) | |||
Model 447 with engine 274, 622, 651, 654, model 448Additional oil filling quantity after replacement of evaporator (rear end) | |||
Model 447 with engine 780.701Additional oil filling quantity after replacement of refrigerant line (front end) | |||
Model 447 with engine 274, 622, 651, 654, model 448Additional oil filling quantity after replacement of refrigerant line (front end) | |||
Model 447 with engine 274, 622, 651, 654, model 448Additional oil filling quantity after replacement of refrigerant line (rear end) | |||
Model 447 with engine 780.701Additional oil filling quantity after replacement of desiccant cartridge | |||
Model 447 with engine 274, 622, 651, 654, model 448Additional oil filling quantity after replacement of desiccant cartridge | |||
Model 447 with engine 780.701Additional oil filling quantity with detectable leakage | |||
Model 447 with engine 274, 622, 651, 654, model 448Additional oil filling quantity with detectable leakage | |||
14 | Fill refrigerant circuit using air conditioning service unit. | ||
| Refrigerant (specification 361.0) | ||
Model 447 with engine 780.701Total filling capacity of refrigerant circuit | |||
Model 447 with engine 274, 622, 651, 654 except code HZ7 (Semi-automatically controlled air conditioning, TEMPMATIC in rear), model 448 except code HZ7 (Semi-automatically controlled air conditioning, TEMPMATIC in rear)Total filling capacity of refrigerant in front air conditioning system | |||
Model 447 with engine 274, 622, 651, 654 with code HZ7 (Semi-automatically controlled air conditioning, TEMPMATIC in rear), model 448 with code HZ7 (Semi-automatically controlled air conditioning, TEMPMATIC in rear)Total filling capacity of refrigerant in front and rear air conditioning systems | |||
| Check | ||
15 | Conduct pressure test using air conditioning service unit. | If there is a pressure drop during pressure test, | |
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check air conditioning system for leakage. | |||
Disconnect | |||
16.1 | Close vehicle interior shutoff valve using diagnostic system. | Model 447 with engine 780.701 | |
Do not yet remove vehicle diagnosis system. | |||
16.2 | Remove adapter cables from vehicle interior shutoff valve and connect electrical connector. | Model 447 with engine 780.701 | |
Electrical connection kit | |||
17 | Disconnect low-pressure connection (1) and high-pressure connection (2) of air conditioning service unit from refrigerant lines. | ||
18 | Attach plugs to refrigerant lines. | ||
| Check | ||
Warning | Risk of burn injuries, suffocation and poisoning when working on the exhaust system and the components connected to it. Risk of suffocation and risk of poisoning caused by inhalation of gaseous and solid components of the exhaust. Risk of poisoning caused by skin contact with solid components of the exhaust. | Wear protective clothing and safety glasses. Use the extraction system. Move people out of the hazard area. | |
Warning | 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. | |
19.1 | Run engine for approx. 4 min at idle speed and check all systems relevant for the proper operation of the air conditioning system. | Model 447 with engine 274, 622, 651, 654, model 448 | |
19.2 | Check function of air conditioning system or cooling system for high-voltage on-board electrical system using diagnostic device. | Model 447 with engine 780.701 | |
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20 | Disconnect charger. |
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220 589 05 99 00
Electrical connection kit