Troubleshooting Guide - Panasonic CS-PC9DKV Service Manual

12 Troubleshooting Guide

12.1. 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 compressor or 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.
Difference in the
intake and outlet
air temperature
operation is started) at the cooling mode
Less than 8
Value of electric
current
during operation
Lower than specified
Gas side pressure
More than 8
(15 minutes afte an
at the cooling mode.
Higher than
specified
Dusty heat exchanger
preventing heat radiation
Excessive amount
of refrigerant
Cooling
High
mode
Inefficient compressor
Low
Insufficient refrigerant
Low
clogged strainer or
capillary tube
45
CS-PC9DKV / CU-
Normal pressure and outlet air temperature(standard)
Gas side pressure
Cooling mode
0.4~0.6(4~6)
Condition: indoor fan speed: high
outdoor temperature:
35
Normal
PC9DKV / CS- PC12DKV
Outlet air
Mpa temperature
2
( )
(kg/cm G)
12~16
(Cooling mode)
Measuring the air
temperature difference
Measuring electric current
during operation
Measuring gas side
pressure
/ CU- PC12DKV