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19. Troubleshooting Guide
Problem
Potential Cause
Solution
POWER
No AC drive red LEDs lit
Should see “---“after power up
sequence.
Improper AC line input wiring or low
line input voltage.
Check L1, L2, L3 for proper voltage
(230/480 VAC) and wiring. Check
circuit breakers.
No Green LED blinking on controller
board.
DC power supply not powered.
Check Blue and Brown wire for voltage
at power supply
230 VAC systems = ~1.4 * AC line =
1.4 * 230 = 325 VDC
480 VAC systems = 230 VAC
Green LED not blinking on controller
(local) board.
DC power supply not providing output
power to local control board.
Check voltage with meter on output of
power supply
Black(-)-to-Red(+) = 5vdc
Black(-)-to-Green(+) = 12 vdc
HANDHELD DISPLAY
LED backlighting not lit on remote
handheld, but green LED blinking at 1
second interval on local board.)
Remote handheld not receiving power.
Open Handheld Front Cover and
measure voltage J5-1/2 to J5-3/4.
Voltage should be ~ 12.0 volts dc. See
Figure 21-1 Handheld Remote Wiring
LED’s not lit, keypad not responding
Remote keypad connector not seated
properly.
Open Handheld Front Cover and
measure voltage and check J4 for
proper connection. See Figure 21-1
Handheld Remote Wiring
LCD display not readable, no text on
display (too light/too dark)
Contrast not adjusted properly.
Use ENTER key with UP ARROW and
DOWN ARROW keys to adjust darker
and lighter, respectively.
No Text on LCD display
Improper software initialization
Remove power for 5 seconds then
reapply.
SYSTEM ERRORS
Handheld displays
“AC Drive Fault
Communications”
on LCD handheld screen.
Communications link between the AC
drive and local board has timed out
Ensure 3 wire connection from local
control board to AC drive. J28 on local
board to drive control terminal strip
pins 2-ground (green), TXA (red), and
TXB (black).
Handheld displays
“Communication
--ERROR—“
Communications link between the local
control board and the handheld remote
has timed out.
Ensure connections between local board
and remote handheld are made. See
Figure 21-1 Handheld Remote Wiring
for connection details. Be sure to check
black/white and white wires.
Handheld displays
“AC Drive Fault
OVERCURRENT”
Motor is drawing excessive current and
the AC drive is limiting its output.
Ensure proper motor sizing and drive
sizing for application.
Содержание Pulsafeeder MPC Vector
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