Daikin RZQG71L9V1, Service Manual

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Test Operation ESIE15-13C
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.