Test Operation ESIE15-13B
60 Field Setting
1.5 Failure Diagnosis at the Moment of First Installation
• In case nothing is displayed on the remote controller (the current set temperature does not
display), check for any of the following abnormalities before you can diagnose possible
malfunction codes.
• Disconnection or wiring error (between power supply and outdoor unit, between outdoor
unit and indoor units, between indoor unit and remote controller).
• The fuse on the outdoor unit PCB may have run out.
• If the malfunction code “
E3”, “E4”, “L8” or “U0” is displayed on the remote controller, there is a
possibility that the stop valves are closed.
• If the malfunction code “
E3”, “E4”, “L4” or “L8” is displayed on the remote controller, there is a
possibility that air inlet or air outlet are blocked.
• If the malfunction code “
U2” is displayed on the remote controller, check for voltage
imbalance.
• If the malfunction code “
U4” or “UF” is displayed on the remote controller, check the inter-unit
branch wiring connection.
• If the malfunction code “
UA” is displayed on the remote controller, there is a possibility that
connection is with incompatible indoor unit.
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