14. Troubleshooting Guide

14.1 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.

Normal Pressure and Outlet Air Temperature (Standard)

 

Gas Pressure

Outlet air

 

PSI

Temperature

 

(kg/cm2G)

(°F)

Cooling Mode

130.5 ~ 174.0

53.6 ~ 60.8

(9 ~ 12)

 

 

 

 

 

Condition: Indoor fan speed = High

Outdoor temperature = 95°F at cooling mode. Compressor operate at rated frequency

Different in the intake

 

 

 

Measuring the air

and outlet

 

 

Normal

 

 

 

temperature different

air temperatures

More than 46.4°F

 

 

 

 

 

 

 

 

 

 

(15 minutes after an

 

 

 

 

operation is started) at

 

 

 

 

cooling mode.

 

 

 

Less than 46.4°F at the cooling mode

 

 

 

Value of electric current

Higher than specified

Dusty condenser

Measuring electric current

 

 

during operation

 

 

preventing heat radiation

 

during operation

 

 

 

Excessive amount

 

 

 

 

 

of refrigerant

 

 

Lower than specified

 

 

 

 

 

Cooling

High

 

 

 

Gas side

Mode

Inefficient compressor

Measuring gas side

 

 

pressure

 

 

 

 

pressure

 

 

Low

Insufficient refrigerant

 

 

 

 

 

 

 

 

 

Low

Clogged strainer or

 

 

 

 

 

capillary cube

 

 

 

 

 

57

 

 

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Panasonic CS-S12NKUW-1, CS-S18NKU-1, CS-S22NKU-1, CS-S9NKUW-1, CU-S9NKU-1 Troubleshooting Guide, Refrigeration Cycle System

CS-S9NKUW-1, CS-S22NKU-1, CU-S18NKU-1, CS-S18NKU-1, CS-S12NKUW-1 specifications

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