Operation and maintenance manual

DX140R/DX140LCRInspection, Maintenance and Adjustment
4-54
Check Air Conditioner Refrigerant
1. Run engine at about 1,800 rpm. Operate for a minimum of
ten minutes to stabilize the system.
2. Press the "HI" fan speed switch to set maximum air flow.
3. Put the temperature control switch in maximum cooling position.
4
. Press the "Internal Air Circulation" switc
h.
5. Compare the flow of bubbles in the sight glass of receiver
drye
r with the drawings in the following table.
FG014513
Figure 94
WARNING
AVOID DEATH OR SERIOUS INJURY
Mixing of tobacco smoke and freon is deadly.
Do not smoke while servicing or recharging
air-cond
itioning system.
Contact with refrigerant can result personal injury, frost bi
te.
Wear Protective glasses when refrigerant lines are opened.
System may still under pressure, release it slowly in a well
ventilate
d area.
Inhaling air conditioner refrigerant gas through a lit
cigare
tte or other smoking method or inhaling fumes
released from a flame contacting air conditioner refrigerant
gas, can cause bodily harm or death.
Use a certified recovery and recycling cart to properly
remov
e
the refrigerant from the air conditioning system.
IMPORTANT
Overfilling refrigerant can cause dangerous
high-pressure and poor cooling action; and low
refrigerant level can cause compressor damage.
Always maintain refrigerant at normal level.
Amount of
Refrigerant
Appearance of the Sight Glass Solutions
Normal
Almost clear.
Any bubbles disappear.
High
No bubbles are seen.
Charge or withdraw the system with
the co
rrect amount of HFC-134a
refrigerant.
Low
A flow of bubbles is visible.