Table of Contents
Advertisement
C: CAUTION
S701001A03
1. HFC-134a A/C SYSTEM
¼ Unlike the old conventional HFC-12 system
components, the cooling system components for
the HFC-134a system such as the refrigerant and
compressor oil are incompatible.
¼ Vehicles with the HFC-134a system can be
identified by the label "A" attached to the vehicle.
Before maintenance, check which A/C system is
installed in the vehicle.
2. COMPRESSOR OIL
¼ HFC-134a compressor oil has no compatibility
with that for R12 system.
¼ Use only the manufacturer-authorized compres-
sor oil for the HFC-134a system; only use
ZXL200PG.
¼ Do not mix multiple compressor oils.
If HFC-12 compressor oil is used in a HFC-134a
A/C system, the compressor may become stuck
due to poor lubrication, or the refrigerant may leak
due to swelling of rubber parts.
On the other hand, if HFC-134a compressor oil is
used in a HFC-12 A/C system, the durability of the
A/C system will be lowered.
¼ HFC-134a compressor oil is very hygroscopic.
When replacing or installing/removing A/C parts,
immediately isolate the oil from the atmosphere
using a plug or tape. In order to avoid moisture,
store the oil in a container with its cap tightly
closed.
3. REFRIGERANT
S701001A0303
¼ The HFC-12 refrigerant cannot be used in the
HFC-134a A/C system. The HFC-134a refrigerant,
also, cannot be used in the HFC-12 A/C system.
¼ If an incorrect or no refrigerant is used, poor
lubrication will result and the compressor itself may
be damaged.
GENERAL DESCRIPTION
S701001A0301
S4M0547A
S701001A0302
AC-13
HVAC System (Heater, Ventilator and A/C)
4. HANDLING OF REFRIGERANT
¼ The refrigerant boils at approx. −30°C (−22°F).
When handling it, be sure to wear safety goggles
and protective gloves. Direct contact of the refrig-
erant with skin may cause frostbite.
If the refrigerant gets into your eye, avoid rubbing
your eyes with your hands. Wash your eye with
plenty of water, and receive medical treatment
from an eye doctor.
¼ Do not heat a service can. If a service can is
directly heated, or put into boiling water, the inside
pressure will become extremely high. This may
cause the can to explode. If a service can must be
warmed up, use hot water in 40°C (104°F) max.
¼ Do not drop or impact a service can. (Observe
the
precautions
and
described on the refrigerant can.)
¼ When the engine is running, do not open the
high-pressure valve of the manifold gauge. The
high-pressure gas will back-flow resulting in an
explosion of the can.
¼ The refrigerant is non-toxic and harmless under
normal operating circumstance, but it may change
to phosgene (a noxious fume) under open flames
or high temperatures (caused by a cigarette or
heater).
¼ Provide good ventilation and do not work in a
closed area.
¼ Never perform a gas leak test using a halide
torch-type leak tester.
¼ In order to avoid destroying the ozone layer, pre-
vent HFC-134a from being released into the atmo-
sphere. Using a refrigerant recovery system, dis-
charge and reuse it.
S701001A0304
operation
procedure
G4M0979
Advertisement
Table of Contents
