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13 Troubleshooting Guide
13.1. Refrigeration cycle system
In order to diagnose malfunctions, make sure that there are no
electrical problems before inspecting the refrigeration cycle.
Such problems include insufficient insulation, problem with the
power source, malfunction of compressor or fan.
The normal outlet air temperature and pressure of the
refrigeration cycle depends on various conditions, the standard
values for them are shown in the table to the right.
Difference in the
intake and outlet
air temperature
operation is started) at the cooling mode
Less than 8
Value of electric
current
during operation
Lower than specified
Gas side pressure
More than 8
℃
(15 minutes aften an
at the cooling mode.
℃
Higher than
specified
Dusty heat exchanger
preventing heat radiation
Exces sive am ount
C ooling
High
mode
Inefficient compressor
Low
Insufficient refrigerant
Low
clogged strainer or
capillary tube
Normal pressure and outlet air temperature(standard)
Cooling mode
★ Condition: indoor fan speed: high
outdoor temperature: 35
(cooling mode)
Normal
of refrigerant
3 9
CS-C45FFH / CU-C45FFH
Outlet air
Gas side pressure
tempera ture
Mpa
2
(kg/cm G)
0.4~0.6(4~6)
℃
Measuring the air
temperature difference
Air outlet vent
Thermometer
Air inlet vent
Measuring electric current
during operation
Measuring gas side
pressure
( )
℃
12~16
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