SiEN34-705 Appendix
General Information 211
7.15.3 [Malfunction of Transmission Examples]
Faulty Condition to Multi-core Wire
Applicable
Models
VRV in general
Condition
Cause
According to the wiring company, two-core lines were to be used as transmission line. However,
multi-core lines are used actually. There was also a case where two cores out of four cores
were being used for power supply.
Measure Request to correct the wiring.
Point of
Diagnosis
7.15.4 [Malfunction of Transmission Examples]
Faulty Condition Caused by the Use of Single-core Line
Applicable
Models
VRV in general
Condition
Cause
A malfunction "U4" is issued due to a single-core line used as a transmission line.
Measure Changed to the VTCF two-core line.
Point of
Diagnosis
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