Troubleshooting Guide; Refrigeration Cycle System - Panasonic CS-RE9NKE Service Manual

14. Troubleshooting Guide

14.1 Refrigeration cycle system

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.
14.1.1
Different in the intake
and outlet
air temperatures
Less than 8°C at the cooling mode
Less than 14°C at the heating mode
Value of electric current
during operation
Lower than
specified
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
Higher than specified
preventing heat radiation
Cooling High
Mode
Low
Low
Heating Low
Mode
Low
Low
Normal Pressure and Outlet Air Temperature (Standard)
Cooling Mode 0.9~1.2 ( 9~12)
Heating Mode 2.3 ~2.9 (23~29)
Condition: Indoor fan speed = High
Outdoor temperature = 35°C at cooling mode and 7° C at
heating mode.
Compressor operates at rated frequency
Normal
Dusty condenser
Excessive amount
of refrigerant
Inefficient compressor
Insufficient refrigerant
Clogged strainer or
capillary cube
Inefficient compressor
Insufficient refrigerant
Clogged strainer or
capillary cube
42
Gas Pressure Outlet air
Mpa Temperature
2
(kg/cm G) (°C)
12~16
36~45
•
Measuring the air
temperature different
•
Measuring electric
current during operation
•
Measuring gas side
pressure