Precautions When Charging Refrigerant - Toyota HILUX 1993 Repair Manual

AIR CONDITIONING SYSTEM

Precautions When Charging Refrigerant

1. DO NOT OPERATE COMPRESSOR WITHOUT ENOUGH
REFRIGERANT IN REFRIGERANT CYCLE
If there is not enough refrigerant in the refrigerant cycle,
oil lubrication will be insufficient and compressor burnout
may occur, so take care to avoid this.
2. DO NOT OPEN HIGH PRESSURE VALVE OF MANIFOLD
GAUGE WITH COMPRESSOR OPERATING
If the high pressure valve is opened, refrigerant flows in
the reverse direction and could cause the charging cylin–
der to rupture, so open and close the low pressure valve
only.
3. BE CAREFUL NOT TO OVERCHARGE WITH REFRIGER–
ANT IN SYSTEM
If refrigerant is overcharged, it causes trouble such as in–
sufficient cooling, poor fuel economy, engine overheating
etc.
ELECTRICAL PARTS
Before removing and inspecting the electrical parts, set
the ignition switch to the LOCK position and disconnect
the negative (–) terminal cable from the battery..
– General Information
Tighten the O–ring fittings or the bolted type fittings to
the specified torque.
AC–5