Service manual

SiE18-201 Troubleshooting - Outdoor Unit Related
Service Diagnosis 209
3. Troubleshooting - Outdoor Unit Related
3.1 The Unit Runs but Doesn’t Cool (Heat) the Room
Supposed
Causes
 Incorrect temperature setting
 Unconnectable models
 Clogged air filter
 Improper load for the capacity
 Excessively long refrigerant pipe
 Faulty installation of indoor unit / outdoor unit
 Clogged refrigerant circuit, etc.
 Gas shortage
 Stop valve closed
 EVn malfunction
 EVH malfunction
 EVP malfunction
Troubleshooting
Check No.1
Refer to P.249
Check No.9
Refer to P.255
YES
Set the temperature at the
desired again.
Connect the correct types
of units.
Clean.
Replace by suitable model
or install additional unit.
Make it within the specified
length.
Refer to the contents of
Checking installation
status.
Refer to the contents of
Refrigerant system check
Perform the same remedy
as that when lack of gas is
detected.
Is the
temperature set
correctly?
Are the
types of indoor and
outdoor units correctly
selected to
connect?
YES
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
NO
While thermostat is OFF.
Check through the
compatibility table
NO
Is the air filter clogged?
YES
YES
Is the load suitable
for the capacity?
NO
NO
Is the
refrigerant piping too
long?
YES
Are the
indoor and outdoor
units installed
normally?
NO
Check No.1
installation condition check.
NO
Check No.9
Refrigerant system
check
There is some faulty point.
YES
Normal
Does gas leak?
NO
To next page
1
Check gas for leaking.
YES
(MF018)