Page 1313 - Foton Workshop Manual - Aumark (BJ1099)

HEATING AND AIR CONDITIONING - REFRIGERANT 41-33

2. Vacuum
(a). Connect the connectors of the A/C
refrigerate collecting/filling system to the
high and low ends of the A/C system
respectively.

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(b). Turn on the high pressure and low pressure
valves of the A/C refrigerate collecting/
filling system.
(c). Select the "Vacuum" operation of the A/C
refrigerate collecting/filling system and set
the timer to 15 minutes.
(d). Start the vacuuming process of the A/C
refrigerate collecting/filling system. When
the set timer is reached,the system will
stop working. 41
(e). Turn off the high pressure and low
pressure valves at the connectors of the A/
C refrigerate collecting/filling system and
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record the reading of the pressure gauge.

(f). Maintain the pressure for 15 minutes. If the reading remains unchanged, it means
there is no leakage in the A/C pipe. Top up the refrigerant, lubricant and coolant. If
the reading grows, check for leakage in the A/C system.
(g). Disconnect the connectors of the A/C refrigerate collecting/filling system to the high
and low ends of the A/C system respectively.

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