Page 2020 - Foton Workshop Manual - Tunland (AT)

61-24 HEATER AND AIR CONDITIONING - REFRIGERANT

REFRIGERANT

CHECK

Leakage test can only be performed when the pressure inside the A/C system is no less than
61
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: 1500
Blower RPM: Max.

Temperature switch: Cool
A/C switch: On

All doors open
NOTICE

The tables below show the data when the cooling system is switched on, without
vacuuming before refrigerant replacement.

• Pressure gauge reading in normal
operation:
Low pressure: 0.2–0.4MPa

High pressure: 1.2–2.0MPa

• Steam in the system (condition: no cooling intermittently)

Page 2020