Led Indicators; Cpu Board Led Indicators - Vega FiberFlex LFXG-H Operating Instructions Manual

Diagnostics and repair

LED indicators

Power supply LED indicators
Table 5.7
LED Description
+6 V +6 V DC
voltage
level to
electronics
+24 Analog
V output loop
voltage
Rela Relay
y condition
indicator

CPU board LED indicators

Use the LED indicators on the CPU board to check the basic functioning of
the gauge. They are visible when you remove the explosion-proof housing
pipe cap.
Normal LED pattern
Note: If the LED band displays the Memory Corrupt pattern, call /
86
Normal
Condition
ON
ON
ON = relay is
energized.
OFF = relay is
de-energized.
CPU LED memory corrupt pattern
VEGA Field Service to report this condition. The gauge does
not operate if the FLASH chip is corrupt.
Error condition
OFF – electronics are
not receiving +6 V DC
voltage required for
functioning.
OFF – 24 V not
present on 4 ... 20 mA
output.
4 ... 20 mA output and
HART
communications are
bad.
None
Memory corrupt pattern
LFXG-H Installation and Operation Guide
Recommendation
Verify +6 V on test
points. Check fuse
on power supply
board. Check power
input terminals 1, 2.
Check loop wiring
and jumpers JP1,
JP2 on power
supply board.
Replace power
supply board.
Check against relay
output terminals 3,
4, and 5. If no relay
output, replace
power supply
board.
On
Blinking
Off