Filling the air conditioning
Prerequisite
Service function must be active.
The engine is switched off.
Heating and air conditioning system is switched off.
The refrigerant circuit is evacuated and tight.
Vehicle must be positioned on the ground.
Danger of injury!
Filling a raised vehicle will result in insufficient filling levels.
In some cases, Sanden SP-A2 refrigerant oil must be injected into the refrigerant circuit. See ADDITIONAL INFORMATION .
Check
- Check whether the loss of refrigerant acc. to Table 1 is exceeded.
Table 1 indicates the permitted loss of refrigerant after a specific period of time.
There is no leak.
| Table 1 | |||||
|---|---|---|---|---|---|
| Number of years since the last filling | 0-1 | 1-2 | 2-3 | 3-4 | 4-5 |
| Approved loss [g] | <30 | <60 | <90 | < 120 | < 150 |
Result
The loss of refrigerant is acc. to Table 1 not exceeded.
Measure
- Top up lost refrigerant.
Do not top up any refrigerant oil.
Result
The loss of refrigerant is acc. to Table 1 exceeded.
Measure
- Top up lost refrigerant.
Top up refrigerant oil acc. to Table 2.
Table 2 indicates the amount of refrigerant oil which must be topped up after a specific period of time in the event of an impermissible loss of refrigerant due to a leak.
| Number of years since last filling | Loss of refrigerant [g] | Top up quantity refrigerant oil |
|---|---|---|
| 0-1 | < 120 | 0 |
| 0-1 | 120-150 | 10 |
| 0-1 | >150 | 20 |
| 1-2 | < 180 | 0 |
| 1-2 | 180-210 | 10 |
| 1-2 | >210 | 20 |
| 2-3 | <240 | 0 |
| 2-3 | 240-270 | 10 |
| 2-3 | >270 | 20 |
| 3-4 | <300 | 0 |
| 3-4 | 300-330 | 10 |
| 3-4 | >330 | 20 |
| 4-5 | <360 | 10 |
| 4-5 | >360 | 20 |
Check
- Check whether and why parts of the refrigerant circuit have been replaced.
Result
Version A: Parts of the refrigerant circuit have been exchanged as the preliminary work to further work or due to a slow leak (minor leak, e.g. hairline crack).
Version B: Parts of the refrigerant circuit have been exchanged due to a sudden leak (major leak, e.g. pipe break caused by an accident).
Measure
- Top refrigerant oil acc. to table:
Version A Version B Air conditioning compressor(1). (1). (1). Evaporator 10ml 35 ml Air conditioning condenser without integrated desiccant insert 20 ml 35 ml Air conditioning condenser with integrated desiccant insert 40 ml 55 ml Desiccant insert/dryer flask 20 ml 55 ml Per replaced refrigerant line 10 ml 35 ml Safety pressure switch, gaskets 0 ml 0 ml (1) Air conditioning compressor: see 6452, lubricating the air conditioning compressor - Top up determined amount of refrigerant oil into the refrigerant circuit.
- Fill the amount of refrigerant as per the type plate into the refrigerant circuit.
- Disconnect the high pressure line and low pressure line on the vehicle.
- Drain the high pressure line and low pressure line.
- Once again close the refrigerant filler neck on the vehicle with the sealing caps.
Prerequisite
Service function must be active.
The engine is switched off.
Heating and air conditioning system is switched off.
The refrigerant circuit is evacuated and tight.
Vehicle must be positioned on the ground.
Danger of injury!
Filling a raised vehicle will result in insufficient filling levels.
In some cases, Sanden SP-A2 refrigerant oil must be injected into the refrigerant circuit. See ADDITIONAL INFORMATION .
Check
- Check whether the loss of refrigerant acc. to Table 1 is exceeded.
Table 1 indicates the permitted loss of refrigerant after a specific period of time.
There is no leak.
| Table 1 | |||||
|---|---|---|---|---|---|
| Number of years since the last filling | 0-1 | 1-2 | 2-3 | 3-4 | 4-5 |
| Approved loss [g] | <30 | <60 | <90 | < 120 | < 150 |
Result
The loss of refrigerant is acc. to Table 1 not exceeded.
Measure
- Top up lost refrigerant.
Do not top up any refrigerant oil.
Result
The loss of refrigerant is acc. to Table 1 exceeded.
Measure
- Top up lost refrigerant.
Top up refrigerant oil acc. to Table 2.
Table 2 indicates the amount of refrigerant oil which must be topped up after a specific period of time in the event of an impermissible loss of refrigerant due to a leak.
Number of years since last filling Loss of refrigerant [g] Top up quantity refrigerant oil 0-1 < 120 0 0-1 120-150 10 0-1 >150 20 1-2 < 180 0 1-2 180-210 10 1-2 >210 20 2-3 <240 0 2-3 240-270 10 2-3 >270 20 3-4 <300 0 3-4 300-330 10 3-4 >330 20 4-5 <360 10 4-5 >360 20 Check
- Check whether and why parts of the refrigerant circuit have been replaced.
Result
Version A: Parts of the refrigerant circuit have been exchanged as the preliminary work to further work or due to a slow leak (minor leak, e.g. hairline crack).
Version B: Parts of the refrigerant circuit have been exchanged due to a sudden leak (major leak, e.g. pipe break caused by an accident).
Measure
- Top refrigerant oil acc. to table:
Version A Version B Air conditioning compressor(1). (1). (1). Evaporator 10ml 35 ml Air conditioning condenser without integrated desiccant insert 20 ml 35 ml Air conditioning condenser with integrated desiccant insert 40 ml 55 ml Desiccant insert/dryer flask 20 ml 55 ml Per replaced refrigerant line 10 ml 35 ml Safety pressure switch, gaskets 0 ml 0 ml (1) Air conditioning compressor: see 6452, lubricating the air conditioning compressor - Top up lost refrigerant.
- Top up determined amount of refrigerant oil into the refrigerant circuit.
- Fill the amount of refrigerant as per the type plate into the refrigerant circuit.
- Disconnect the high pressure line and low pressure line on the vehicle.
- Drain the high pressure line and low pressure line.
- Once again close the refrigerant filler neck on the vehicle with the sealing caps.