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12 Troubleshooting Guide
12.1. 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
Less than 14
Value of electric
current
during operation
Lower than specified
Gas side pressure
More than 14
(15 minutes afte an
operation is started)
at the heating mode
More than 8
(15 minutes afte an
at the cooling mode.
at the heating mode.
Higher than
specified
preventing heat radiation
Excessive amount
Cooling
High
mode
Inefficient compressor
Low
Insufficient refrigerant
Low
Low
Inefficient compressor
Heating
Low
mode
Insufficient refrigerant
Low
Normal pressure and outlet air temperature(standard)
Cooling mode
Heating mode
Condition: indoor fan speed: high
Normal
Dusty heat exchanger
of refrigerant
clogged strainer or
capillary tube
clogged strainer or
capillary tube
59
CS-PA7DKD / CU-PA7DKD / CS-PC7DKD / CU-PC7DKD
Gas side pressure
Mpa
temperature
2
(kg/cm G)
0.4~0.6(4~6)
1.5~2.1(15~21)
outdoor temperature:
35
(Cooling mode)
7
(Heating mode)
Measuring the air
temperature difference
Measuring electric current
during operation
Measuring gas side
pressure
Outlet air
( )
12~16
36~45
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