Zetor UTILIX CL Operator's Manual page 116

2. Checking the air conditioning system charge
(1) Check the refrigerant charge.
Run the engine at 1 500 rpm.

Set the air conditioning system in the coldest for 5 minutes.

Check the sight glass dear or cloud.

Caution:
If the air-con. is operated with not charged.

The lubrication in the compressor can cause the damage.

(2) Check the refrigerant with receive drier sight glass.
-
CABIN SYSTEM
Bubbles or foam visible
Bubbles flow and

refrigerant gas
disappeared like a fog
flows.
Same bubble appeared

occasionally. (1~2 sec.
gap)
No bubble shown high-

pressure pipe is hot
abnormally.
H-L pressure of the
pressure gauge needle
indicates high pressure
abnormally.
Refrigerant in the sight

is shown clearly.
When engine RPM

operates with high low
some bubbles
disappear slowly.
Trouble shoot
Deficient of refrigerant

replenish.
Nothing different temperature

between H.L pipe.
High pressure of the pressure

gauge needle indicates low
pressure.
Replenish the refrigerant.

High pressure pipe is hot and

low pressure pipe is a little
cool.
H.L pressure of the pressure

gauge needle indicates low
pressure.
Too much of refrigerant

deflate.
High pressure pipe is not

abnormal.
H.L pressure of the pressure

gauge needle indicates high
abnormally.
Normal refrigerant gas

situation.
High pressure pipe is hot Low

pressure pipe is cool.
High low pressure is normal

with below.
Low : 1.5~2.0 kg/m

High : 14.5~15 kg/m

Abnormal
Abnormal
Abnormal
Normal
2
2
115