GENERAL
B2050, B2350, B2650, B3150, WSM
G-42
Checking Amount of Refrigerant (Gas) [CABIN]
To avoid personal injury:
• Liquid contact with eyes or skin may cause frostbite.
• In the event of a leakage, wear safety goggles. Escaping
refrigerant can cause severe injuries to eyes.
• In contact with a flame, R134a refrigerant gives a toxic gas.
• Do not disconnect any part of the refrigeration circuit of the
air conditioning system.
A shortage of refrigerant impairs the air-conditioner
performance. Check the following points. If it is indicated that the
amount of refrigerant is extremely low, inspect and charge.
Checking Procedure
1. Run the air-conditioner in the following conditions.
• Engine speed: About 1500 min
-1
(rpm)
• Temperature control lever:
Maximum cooling position (leftmost)
• Fan switch: Highest blow (HI)
• Air-conditioner switch: ON
2. Look into the sight glass to see if the refrigerant is flowing
through its circuit.
• Charge only with R134a not R12 refrigerant (gas).
9Y1210982GEG0071US0
(1) Sight Glass (A) Proper: Little or no air bubbles in
the refrigerant flow.
(B) Low: Lots of air bubbles in the
refrigerant flow (air bubbles or
foam passing continuously).
(C) Overfull or no refrigerant:
Colorless and transparent.
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