CS-UE9JKE, CS-UE12JKE, CU-UE9JKE, CU-UE12JKE - Panasonic Air Conditioner Service Manual (repair manual). Page 35

35 

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. 
 

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 

•  Measuring the air 

temperature different 

•  Measuring electric 

•  Measuring gas side 

pressure 

More than 8°C 

(15 minutes after an operation 

is started) at cooling mode. 

Above 14°C (15 minutes after 

an operation is started.) at 

heating mode 

Less than 8°C at the cooling mode 

Less than 14°C at the heating mode

Higher than specified

Lower than 
specified 

Gas side 

pressure 

Inefficient compressor

Insufficient refrigerant

Clogged strainer or 

capillary cube 

Cooling 

Mode 

High

Low

Low

Inefficient compressor

Insufficient refrigerant

Clogged strainer or 

capillary cube 

Heating 

Mode 

Low

Low

Low