Operation of charging vehicle air conditioning system
- Make
- Fiat
- Model
- Punto (176) Factory Service Manual
- Year
- 1993–1999
- Section
- Heating/ventilation › Operation of charging vehicle air conditioning system
50 Auxiliary unitsOperation of charging vehicle air conditioning system
| FAULTS | CAUSES | OPERATIONS TO BE CARRIED OUT |
|---|---|---|
| Vacuum pump works but does not achieve required level of vacuum | VAC cock closed REF cock open Pump oil contaminated |
Open VAC cock Close REF cock Change pump oil |
OPERATION OF CHARGING VEHICLE AIR CONDITIONING SYSTEM
| FAULTS | CAUSES | OPERATIONS TO BE CARRIED OUT |
|---|---|---|
| Coolant does not flow from equipment to vehicle system | LEVEL warning light comes on because coolant within dispensing cylinder is at minimum level | Transfer coolant R134a from a canister to the equipment dispensing cylinder |
| Coolant does not flow, or only very slowly | Pressures between equipment and system have equalized | Transfer coolant from dispensing cylinder to vehicle air conditioning system to activate air conditioner |
OPERATION OF FILTER REPLACEMENT
| FAULTS | CAUSES | OPERATIONS TO BE CARRIED OUT |
|---|---|---|
| Required vacuum level not achieved during filter replacement | Leak from solenoid EV3 Leak in inlet circuit |
Clean and/or replace solenoid EV3 Contact manufacturer's Service department |
NOTE Before carrying out any operation that involves opening the coolant circuit (except filter replacement) evacuate all traces of coolant by connecting a second recovery and recycling device to the Cleaner 134.
In the above tables, remedial operations that involve opening the coolant circuit are marked with (*).
When the device is off, i.e. de-activated, all solenoids are in closed position, i.e. do not permit coolant to flow through.
Parts & tools for this job For 1993 Fiat Punto
- TOOLA/C manifold gauge setSearch: AC manifold gauge set
- TOOLUV leak detection kitSearch: AC UV leak detection kit
- PARTCabin filterSearch: Fiat Punto 1993 cabin filter
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