CS-PA7KKD, CS-PA9KKD, CS-PA12KKD, CS-PA16KKD, CU-PA7KKD, CU-PA9KKD, CU-PA12KKD, CU-PA16KKD - Panasonic Air Conditioner Service Manual (repair manual). Page 32

32 

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

0.4 ~ 0.6 (4 ~ 6) 

12 ~ 16 

Heating Mode

1.5 ~ 2.1 (15 ~ 21) 

36 ~ 45 

Condition:   Indoor fan speed = High 

Outdoor temperature = 35°C at cooling mode.

And 7°C at the heating mode 

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