12.
Troubleshooting Guide
12.1 Refrigeration Cycle System
In order to diagnose malfunctions, ensure the air conditioner is free
from electrical problems before inspecting the refrigeration cycle.
Such problems include insufficient insulation, problem with the
power source, malfunction of a compressor and a 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.
Different in the intake
and outlet
air temperatures
Less than 8°C at the cooling mode
Value of electric current
during operation
Lower than specified
Gas side pressure
More than 8°C
(15 minutes after an
operation is started) at
cooling mode.
Higher than specified
Cooling
Mode
High
Low
Low
Normal Pressure and Outlet Air Temperature (Standard)
Cooling Mode
Normal
Dusty condenser
preventing heat radiation
Excessive amount
of refrigerant
Inefficient compressor
Insufficient refrigerant
Clogged strainer or
capillary cube
26
Gas Pressure
2
Mpa(kg/cm
G)
0.4 ~ 0.6 (4 ~ 6)
Condition: Indoor fan speed = High
Outdoor temperature = 35° C at cooling mode.
•
Measuring the air
temperature different
•
Measuring electric current
during operation
•
Measuring gas side
pressure
Outlet air
Temperature
(° C)
12 ~ 16