Si30-408
Malfunction of Transmission Examples
Cases for Examination
125
3.5
[Malfunction of Transmission Examples]
"Under Centralized Control" is Displayed on the
Individual Remote Controller.
Applicable
Models
VRV in general
Condition
"Under central control" is displayed on the individual remote controller and operation by the
remote controller is disabled.
Cause
T1 and T2 terminals on the indoor side had been short-circuited by mistake.
Measure
The short circuit line was removed. Before taking measures, check the condition because the
forced stop input may have been wired intentionally based on the facility conditions on site.
Point of
Diagnosis
3.6
[Malfunction of Transmission Examples]
An Malfunction "U4" is Issued.
Applicable
Models
VRV in general
Condition
Cause
DIII-NET adapter was installed on the indoor-to-outdoor line.
An malfunction "U4" is displayed on the individual remote controller though operation through
the centralized controller is possible.
Measure
Corrected so that the DIII-NET expander adapters installed on the outdoor-to-outdoor line.
Point of
Diagnosis