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14. Troubleshooting Guide
14.1 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 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 on the right.
14.1.1
Normal Pressure and Outlet Air Temperature (Standard)
Gas Pressure
Mpa
(kg/cm
2
G)
Outlet air
Temperature
(°C)
Cooling Mode 0.9~1.2 ( 9~12) 12~16
Heating Mode 2.3 ~2.9 (23~29) 36~45
Condition: Indoor fan speed = High
Outdoor temperature = 35°C at cooling mode and 7°C at
heating mode.
Compressor operates at rated frequency
Different in the intake
and outlet
air temperatures
Normal
Value of electric current
during operation
Dusty condenser
preventing heat radiation
Excessive amount
of refrigerant
x Measuring the air
temperature different
x Measuring electric
current during operation
x Measuring gas side
pressure
More than 8C
(15 minutes after an operation
is started) at cooling mode.
Above 14C (15 minutes after
an operation is started.) at
heating mode
Less than 8C at the cooling mode
Less than 14C at the heatin
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