Viconics VT7682S Installation Manual - Manual (Page 17)

17 | VT7682S Series-Installation Guide
T
ROUBLESHOOTING GUIDE
All models
Symptom Possible Cause Corrective Action
No display on the
Terminal
Equipment
Controller
Absent or incorrect
supply voltage
1. Check power supply voltage between C
& RC to be from 19-30 VAC
2. Check for tripped fuse or circuit breaker
Overloaded power
transformer
Verify that the transformer used is
powerful enough (enough VA’s) to supply
all controlled devices including the
Terminal Equipment Controller
Keyboard menu
does not access
all functions
Keyboard locked
Change configuration parameter
LOCKOUT
to value “0” to access all levels
of the menu
Digital display
shows missing
digits or erratic
segments
Defective display Replace Terminal Equipment Controller