LG LF300CP(LP-C303R20) - Manual (Page 30)

–30–
Note: Use an appropriate measuring instrument for readjustment.
*1: Check the High-pressure switch indication.
*2: Check the Low- pressure switch indication.
WHAT TROUBLED COMPLAINTS HOW TO CHECK REMEDY
Other parts than the unit
Outdoor coil
In-condensable gas
blended.
High pressure switch
Refrigerant
Outdoor Fan
Improper opening of the
service valves in the
refrigerant line
Coil is dirty *1
Air intruded into the
refrigerant pipe line *1
Improper adjustment
A shortage of refrigerant
amount. * 2
Reverse rotation of fan
Obstacle
Air short circuit *1
Checking
Checking
In the event that
difference between the
saturating temperature
corresponding to high
pressure and the
temperature of air
discharged from the
outdoor coil is more than
15°C, incondensable gas
may be blended.
Check it with a pressure
gauge.
Confirm the wind blowing
out.
Check it with eyes.
Open it properly
Wash it by means of
something like chemical
washing.
Extract air by vacuum
pump, then recharge the
refrigerant.
Readjust it to normal
operating pressure.
(Note)
Don't alternate the
specified adjusting
pressure. If the adjusted
pressure exceeds the
specified range, it will
cause a great accident.
Recharge the
refrigerant. Repair the
spot where it leaks.
If reversed, connect
interchanged wires to
each terminal.
Power wirings.
The Units discontinue after the operation started