CS-MA70KE, CS-MA90KE, CS-MA120KE, CU-MA180KE, CU-MA190KE, CU-MA240KE - Panasonic Air Conditioner Service Manual (repair manual). Page 42

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MAC9509078C2

In order to diagnose malfunctions, make sure that
there are no electrical problems before inspect-
ing  the refrigeration cycle. Such problems include
insufficient insulation, problem with the power source,
malfunction of a compressor or a fan.
The normal outlet air temperature and pressure
of the refrigeration cycle depends on various condi-
tions; the standard values for them are shown in the
table on the right.

Normal Pressure and Outlet Air Temperature (Standard)

Cooling mode

Heating Mode

Outlet air

temperature

(

°

C)

12 ~ 16

36 ~ 45

●

●

●

Less than 8

°

C at cooling mode

Less than 14

°

C at heating mode

★

 Condition: Indoor fan speed; High

Outdoor temperature 35

°

C at cooling mode and

7

°

C at heating mode

Gas pressure

MPa

(kg/cm

2

G)

0.4 ~ 0.6 (4 ~ 6)

1.5 ~ 2.1 (15 ~ 21)

Difference in the intake

and outlet

air temperatures

Above 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

Normal

Value of electric

current during operation

Higher than specified

Dusty condenser

preventing heat radiation

Excessive amount

of refrigerant

Lower than specified

Gas side
pressure

Cooling Mode

Low

Inefficient compressor

Insufficient refrigerant

Clogged strainer or

capillary tube

Inefficient compressor

Insufficient refrigerant

Clogged strainer or

capillary tube

Low

Low

Low

Low

High

Heating Mode

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