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Si30-408
VRV in General
Cases for Examination
111
1.3
Trial operation was Initiated but not Started with an
Malfunction "LC" Displayed.
Applicable
Models
RXYP
~
KJ and RXEP
~
KJ (VRV Plus series)
Condition
Test operation was initiated but not started with an malfunction "LC (transmission malfunction
between the inverter PC board and the control PC board) displayed.
Cause
Accessory wire was not provided between the outdoor unit and the heat exchanger unit.
Measure
Completes by attaching an accessory wire.
Point of
Diagnosis
The outdoor unit (master unit) and the heat exchanger (slave unit) must be connected not only
with pipes but with wires.
1.4
After Replacement of the Control PC Board, Operation
does not Start with an Malfunction "LC" Displayed.
Applicable
Models
RXYP
~
KJ and RXEP
~
KJ (VRV Plus series)
Condition
After replacement of the control PC board, operation does not start with an malfunction "LC"
displayed.
Cause
Operation was initiated without setting the horsepower.
Measure
Set the horsepower based on the service manual or information of repair of parts.
Point of
Diagnosis
Setting the horsepower corresponding to the capacity of the model is needed after replacing the
control PC board of VRV.
For setting methods, refer to the page 199 "4. Field settings for replacement of the spare control
PC board" of the section "G. Appendix".
Outdoor unit
Heat exchanger unit