Panasonic CS-S9NKUA Service Manual download pdf (Page 36)

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

PSI

(kg/cm

Outlet air

Temperature

(°F)

Cooling Mode

130.5 ~ 174.0

(9 ~ 12)

53.6 ~ 60.8

Condition: Indoor fan speed = High

Outdoor temperature = 95°F at cooling mode.

Compressor operate 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

Gas side

pressure

Inefficient compressor

Insufficient refrigerant

Clogged strainer or

capillary cube

•

Measuring the air

temperature different

•

Measuring electric current

during operation

•

Measuring gas side

pressure

More than 46.4°F

(15 minutes after an

operation is started) at

cooling mode.

Less than 46.4°F at the cooling mode

Higher than specified

Cooling

Mode

High

Low

Lower than specified

1 2 ... 31 32 33 34 35 36 37 38 39 40 41 ... 73 74

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Panasonic CS-S9NKUA Service Manual Page 36

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