Page 1305 - Foton Workshop Manual - Aumark (BJ1099)

HEATING AND AIR CONDITIONING - REFRIGERANT 41-25
REFRIGERANT

CHECKING

Leakage test can only be performed when the pressure inside the A/C system is no less
than 0.196MPa. However, don't inject compressed air into the system, or the moisture,
dust or other impurities in the air may deteriorate the drying agent or contaminate the
system. Check refrigerant leakage in any of the following methods:

1. Measure the system pressure with manifold pressure gauge
(a). It detects the defect with a manifold pressure gauge. Read the manifold pressure
gauge under the following conditions.
Test conditions:
Inlet temperature: 30~35℃
Engine RPM: 1500rpm
Blower RPM: Max
Temperature switch: Cool
A/C switch: ON
All doors open
NOTICE:
Inspect the A/C system via the diagrams and notes below, in order to judge the
malfunctions and malfunction causes in the air conditioning system.

• Pressure gauge reading in normal 41
operation:
Low pressure:0.2~0.4MPa
High pressure:1.2~2.0MPa

Page 1305