7.1Codes and Description HSU-18HEA03/R2
7.1.1Problem Symptoms and Measures
Symptom Check Item Details of Measure
Reference
page
Check the power supply.
Check to make sure that the rated voltage is
supplied.
----
None of the
units operates
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.
----
7.1.2 Error Codes and Description indoor display
Code indication
indoor
Description
Reference
Page
E1 Room temperature sensor failure ----
E2 Heat-exchange sensor failure ----
E4 Indoor EEPROM error ----
Indoor Malfunction
E14 Indoor fan motor malfunction ----
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.
E1: Room temperature sensor failure CN6
E2: Heat-exchange sensor failure CN6
HSU-18,22HEA03/R2 Service Diagnosis
63
Domestic Air Conditioner
7.Codes and Description
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