This information is supplementary to the R134 All Models brochure and to 106 - 405 - 605: R134a Service Informations
Общие рекомендации
ВниманиеWhatever the type of circuit (R12 or R134a), it is essential that the compressor is operated for at least 1 to 2 minutes per month throughout the year
Customers must be reminded of this recommendation
ПримечаниеIn winter, operation of the air conditioning accelerates de-misting
Refrigerant quantities
| модели | количество R12 в г | количество R134a в г |
|---|---|---|
| 106 | карбюратор: 875 ± 25 система впрыска: 975 ± 25 | 875 ± 25 |
| 205 | 900 | - |
| 306 | - | 900 ± 25 |
| 405 | 675 | |
| 605 | 885 |
Compressor data
Compressor data
- Фиксированный объем цилиндров
- Переменный объем цилиндров
| компрессор | рабочий объем, см3 | объем масла | тип масла | число поршней |
|---|---|---|---|---|
| SD7H13 | 129,2 | |||
| SD7H15 | 154,9 | |||
| SD7V12 | 10,4 - 122,8 | |||
| SD7V16 | 10,4 - 161,3 |
ВниманиеЗапрещается использовать другой тип масла
Сертифицированный материал
4-1: filling equipment
| equipment model | R12 | R134a |
|---|---|---|
| создать вакуум в системе зарядка | 9901.13 9901.12 | 9901.20 9901.21 |
| recovery only | 9901.14 | - |
| recovery, filtering, vacuum extraction, charging | - | 9901.22 |
ПримечаниеThis equipment must be used according to the instructions attached
ВниманиеThe method of operation is described in brochure 496: R134a air conditioning all models
4-2: Прибор для определения утечек
| R12 | R134a |
|---|---|
| 9901.15 | 9776.73 |
ПримечаниеThis equipment must be used according to the instructions attached
4-3: прочее
Some click-on connectors must be removed using a special tool
| цветная метка (/) | реферанс P.R | используемый для трубки модуля |
|---|---|---|
| белый | 9901.27 | M12 |
| красный | 9901.28 | M06 |
| синий | 9901.29 | M08 |
| черный | 9901.30 | M10 |
ПримечаниеThe method of operation is described in brochure 496: R134a air conditioning all models
Miscellaneous recommendations
5-1: компрессор
When a compressor is suspected of being faulty following diagnostics, confirm the fault by carrying out the following operations
ПримечаниеDepending on its position in the vehicle, some of the operations below may be carried out without removing the compressor
Supply the compressor directly with 12 volts: check the clutch engagement
ПримечаниеThe compressor supply lead is fitted with a diode check the clutch engagement (transposing the two wires)
Turn the compressor clockwise, using a spanner, to locate any seizing or sticking points
With the compressor in position
- Carry out a leak detection test on the compressor itself, on the cover seal and on the rotary seal on the clutch side
- Check the tightening torques of the connectors or the clamp
- Check that the O-rings are present on the connectors or the clamp by checking for leaks from the connectors
Ensure that there is no oil on the compressor clutch
- If oil is present check that it is not engine oil, or power steering fluid..
- Check the compressor air gap
Значение 0,4 mm минимум
If, having carried out these operations, no fault has been detected in the compressor, it is probably not faulty
ПримечаниеWith the compressor removed, turn the compressor clockwise using a spanner to check that there is no sticking point or seizing without rotation being affected by the presence of coolant
5-2: бачок осушителя
The dehydrator reservoir must always be replaced in the following cases
- Humidity warning light pink
- Circuit open and without a cap for more than 5 min
- Reservoir open to the atmosphere (without a cap) for more than 5 min
5-3: масла
The oils used with R134a deteriorate very quickly when in contact with atmospheric humdity
Never leave a container open and use new containers if possible
5-4: слив из контура
Unless indicated otherwise in the instructions of the equipment being used
Слить жидкий хладагент из контура через клапан низкого давления (газовая зона), и делать это очень медленно, чтобы в контур не попало масло из компрессора
5-5: lubrication of the seals
When working on the connectors, always fit new seals and lubricate them with compressor oil
Напоминание
6-1: role of the pressure switch
The pressure switch is a safety unit, fitted to the high pressure (HP) section of the circuit, which has three functions
6-2: контур низкого давления
The pressure switch suppresses compressor operation when the pressure falls below 2,5 bars
This protects the compressor from seizing caused by inadequate oil circulation due to insufficient refrigerant (probably caused by leak)
6-3: контур высокого давления
The pressure switch suppresses operation of the compressor when the pressure exceeds 26 bars (this protects the components from excess pressure)
6-4: fan unit control
It engages the fan(s) at high speed when the pressure reaches 19 bars in the case of R12 or 17 bars in the case of R134a
This improves the refrigerant condensation function under certain conditions and increases air conditioning performance
Role of the coolant thermostat (BITRON)
7-1: описание
The coolant thermostat is an electronic instrument which, in conjunction with an engine coolant temperature sensor, fulfills the following functions
- Control of the fans via relays
- Illumination of the warning light
- Cut-off of the air conditioning via a relay
- Gives engine hot information to the vehicle air conditioning unit
- При необходимости обеспечить последующее охлаждение двигателя
7-2: effects on air conditioning
Depending on version, the coolant thermostat suppresses the engagement of the compressor
- When the engine temperature is not high enough
- When the engine temperature is too hot (usually, above 112 °C)