Engine JAC HFC4DA1-2C. Manual - part 95

AT

AT

AT

AT Air

Air

Air

Air Conditioner

Conditioner

Conditioner

Conditioner

- 169 -

Diagnosis

Diagnosis

Diagnosis

Diagnosis and

and

and

and Testing

Testing

Testing

Testing

A/C

A/C

A/C

A/C system

system

system

system performance

performance

performance

performance testing

testing

testing

testing

1.

Test the vehicle under direct sunlight.

2.

Don’t test the vehicle under airflow obstruction of
condenser, such as the vehicle is parked closely
against wall.

3.

Set the blower motor to the highest speed mode.

4.

External air circulation mode.

AT

AT

AT

AT Air

Air

Air

Air Conditioner

Conditioner

Conditioner

Conditioner

- 170 -

Diagnosis

Diagnosis

Diagnosis

Diagnosis and

and

and

and Testing

Testing

Testing

Testing

A/C

A/C

A/C

A/C system

system

system

system performance

performance

performance

performance testing

testing

testing

testing

5.

Set the cooling temperature to the coldest status.

6.

Open the instrument panel air vent facing right
ahead. Insert the temperature gauge into the panel
air vent center in thickness of 50mm.

7.

Test under idling status.

8.

Both front windows are closed.

AT

AT

AT

AT Air

Air

Air

Air Conditioner

Conditioner

Conditioner

Conditioner

- 171 -

Diagnosis

Diagnosis

Diagnosis

Diagnosis and

and

and

and Testing

Testing

Testing

Testing

A/C

A/C

A/C

A/C system

system

system

system performance

performance

performance

performance testing

testing

testing

testing

9.

The engine hood is closed.

10. Connect the precision pressure gauge to A/C

system.

11. As for the precise testing of humidity (relative

humidity %), the pressure and temperature of air
supply outlet shall vary with humidity (relative
humidity

%).

Please

refer

to

“A/C

System

Performance Table” in this section for details.

12. Shut down the engine. Compare the readings with

data listed in “A/C System Performance Table” and
no big difference can be found under normal
operation of A/C system.

The best status

Normal

In need of maintenance

AT

AT

AT

AT Air

Air

Air

Air Conditioner

Conditioner

Conditioner

Conditioner

- 172 -

Diagnosis

Diagnosis

Diagnosis

Diagnosis and

and

and

and Testing

Testing

Testing

Testing

R

R

R

Refrigerant

efrigerant

efrigerant

efrigerant recovery

recovery

recovery

recovery

1.

Park the vehicle in well-ventilated areas.

2.

Connect to the refrigerant recovery machine.

3.

Turn on the refrigerant recovery machine and select
the refrigerant reclaimer on the control panel.

4.

Open the manual valves at both high-pressure and
low-pressure sides.