Panasonic CU-C24KKS, CU-C18KKS, CS-C18KKS Troubleshooting Guide, Refrigeration cycle system

15. Troubleshooting Guide

15.1 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
	Mpa	Temperature
	(kg/cm2G)	(°C)
Cooling Mode	0.4 ~ 0.6 (4 ~ 6)	12 ~ 16
Condition: Indoor fan speed = High
Outdoor temperature = 35°C

Different in the intake				•	Measuring the air
and outlet			Normal
					temperature different
air temperatures	More than 8°C
	(15 minutes after an
	operation is started)
Less than 8°C 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
			53