LiuGong CLG835H, Service Manual

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5-10
Testing and Adjustment
January 24, 2017
Air conditioning system test CLG835H
●
Observe sight glass beside reservoir, and
touch lower end of reservoir by hand. If the
lower end of reservoir is cold while bubbles
appear through sight glass, it means strainer
inside reservoir is blocked. In normal circum-
stances, the temperatures at all parts of res-
ervoir are basically the same to that of
condenser outlet.
●
Touch air intake hose joint (thick joint) of
compressor by hand. If it is not cold, it means
refrigerant is insufficient or refrigerating sys-
tem is blocked or compressor valve block is
damaged. Further inspection is needed.
●
If air cooler is switched on for about 20~50
minutes, air at the outlet is getting hot, air
outlet volume becomes smaller. The cooling
capacity and air outlet volume return to nor-
mal when the cooler is switched off (but air
ON) and then switched on 10~15 minutes
later, it means defrosting sensor in evapora-
tor is out of order.
●
If the refrigeration is operated normally for
several minutes, and stops for several min-
utes, and then restores to normal for several
minutes, so repeatedly, please observe the
operation condition of compressor: If com-
pressor operates in both cases of refrigera-
tion and no ,refrigeration, it means there is
too much water in the system; If compressor
only operates in the condition of refrigeration
and does not operate in the condition of no
refrigeration, the reason may be that the air
temperature at that time is lower than or
close to set temperature, or control panel is
out of order.
●
If the refrigeration operates for several sec-
onds to tens of seconds, and stops for sev-
eral seconds to tens of seconds, so
repeatedly, it means there is too much refrig-
erant or air is mixed in refrigerating system,
or the condenser is too dirty, the system
enters automatic protection due to overhigh
pressure, so that further check and treatment
are needed.