Domestic air conditioner
10.4Codes and Description
10.4.1.Problem Symptoms and Measures
Symptom Check Item Details of Measure
None of the units
operates
Check the power supply.
Check to make sure that the rated voltage is
supplied.
Check the indoor PCB Check to make sure that the indoor PCB is broken
Equipment
operates but does
not cool, or does
not heat (only for
heat pump)
Diagnosis by service
port pressure and
operating current.
Check for insufficient gas.
Large operating
noise and
vibrations
Check the installation
condition.
Check to make sure that the required spaces for
installation (specified in the Technical Guide, etc.) are
provided.
10.4.2 Error Codes and Description indoor display
Code indication
Description
Reference
Page
indoor
Indoor Malfunction
E1 Room temperature sensor failure 28
82eruliafrosnesegnahcxe-taeH2E
92rorreMORPEEroodnI4E
30noitcnuflamrotomnafroodnI41E
The code indication that is listed above is the main fault
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or else parts damage
may be occurred.
10.4.2.1 Thermistor or Related Abnormality
Indoor Display E1: Room temperature sensor failure
E2: Heat-exchange sensor failure
Method of The temperatures detected by the thermistors are used to determine thermistor errors
Malfunction
Detection
Malfunction when the thermistor input is more than 4.92V or less than 0.08V during compressor
.noitareponoisiceD
Conditions
Note: The values vary slightly in some models
Supposed
Faulty connector connection
Causes
Faulty thermistor
Faulty PCB
Troubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector,
Service diagnosis
28
Method of
Malfunction
Detection
Malfunction
noisiceD
Conditions
Supposed
Causes
Method of
Malfunction
Detection
Malfunction
Detection
Conditions
Supposed
Causes
Troubleshooting
or parts damage may be occurred.
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