Troubleshooting Guide; Refrigeration Cycle System - Panasonic CS-MPS9SKH Service Manual

13. Troubleshooting Guide

13.1 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.
Different in the intake
and outlet
air temperatures
Less than 8°C at the cooling 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.
Higher than specified
Cooling
Mode High
Low
Low
Normal Pressure and Outlet Air Temperature (Standard)
Cooling Mode
Condition: Indoor fan speed = High
Normal
Dusty condenser
preventing heat radiation
Excessive amount
of refrigerant
Inefficient compressor
Insufficient refrigerant
Clogged strainer or
capillary cube
43
Gas Pressure
MPa
2
(kg/cm G)
0.9 ~ 1.2 (9 ~ 12)
Outdoor temperature = 35°C at cooling mode.
Compressor operate at rated frequency

Measuring the air
temperature different

Measuring electric current
during operation

Measuring gas side
pressure
Outlet air
Temperature
(°C)
12 ~ 16