Functional Check

Functional Check

This simple 'first line check' will allow you to ascertain whether the system is operating within its design parameters, without recourse to (JDE). Please carry out the following, in order.
- Start engine and attain normal running temperature.
- Press AUTO to display selected temperature and illuminate AUTO & A/C state lamps.
- Rotate FAN to increase or decrease lower speed, verify bar graph representation.
- Operate NC to toggle on or off. Because the compressor can be inhibited by the engine management system, ensure that the engine temperature is normal and that the ambient is above 5° C
- Operate RECIRC, state lamp should be lit and the flap behind the blower grille open.
- Operate distribution buttons in turn, verify correct air distribution and relevant state lamp.
- Operate DEFROST, check max fans and air to front screen.
- Cycle TEMPERATURE to 'Hi' and 'Lo' to verify demanded variations and display operation. Note that extremes will provide max heat or cold independent of in-car temperature.
- Operate EXT to toggle between ambient and control temperatures.
- Operate HFS and HRW to note timer and mirror operation.
- Initiate System Self Test to check for, and extract, stored faults should any of the above not perform as stated.