Air Conditioning System Troubleshooting - Kubota KX080-3 Workshop Manual

WSM KX080-3 Service
C.Troubleshooting
a. Procedure
The chart shows the basic troubleshooting procedure.
Car air conditioner troubles are roughly classified in the refrigeration cycle and electrical system. In this
chapter the basic troubleshooting procedure is discussed.
s ing the user
(Ask the regular machine operator.)
(Ask the complaining person.)
onfirming the phenomenon
Ask about the details of what is wrong yet cannot
be confirmed. Ask the user to witness.
(See if the user is too sensitive to heat or cold.)
Checking the air-conditioning circuit
Checking the activating pressure
Checking for gas leak
epairing an
b. Asking the user and confirming the phenomenon
Before troubleshooting, it is essential to fully understand what is wrong and how it happened. If a trouble
occurs from time to time or if it cannot be reproduced, in particular, the first step must be to ask the
machine operator about the situation of the trouble.
What to ask
What
When
Where
Why
How
asic inspection
Cleaning the control mechanism, V belt and filter
Checking the sight glass and pipe connections
Check the electrical system
(for fuse burn-out, poor grounding or poor contact).
ouble-chec ing
Type of machine, model of engine, model of air conditioner
Date, time, how often
Worksite (road) condition
Running condition, weather
Feeling of phenomenon
VI-S-9
What? Where?
In what condition now?
In what condition before?
How compared to other machines
(of the same type)?
Since when?
Repaired before?
Call the user at a later date about the machine condition.
VI Air Conditioner