47
Troubleshooting (continued)
Symptom Possible Causes Diagnosis Resolution
LCD wall control
is o or not
functioning
(display shows
nothing or is unlit,
and wall control is
unresponsive)
(continued)
Multiple LCD wall
controls wired to a
single operator.
Only one LCD wall control is
supported per operator. Check that
only one is connected to the WALL
CTRL terminals on the powerhead
main board.
Disconnect any additional LCD wall
controls and wire just one LCD wall
control.
If additional control stations are
desired, use the SBC or OPEN,
CLOSE, and STOP terminals instead.
Wall control is
wired to incorrect
terminals on the
powerhead main
board.
Conrm that wall control wiring is
run to the WALL CTRL terminals on
the powerhead main board.
Move wall control wiring to the
WALL CTRL terminals
No power to
powerhead main
board
Verify MAIN PWR LED is lit on the
mainboard. If if it unlit, main board
may not have power.
Follow troubleshooting for symptom
'Powerhead main board is o'
Wall control circuit
shorted
Test for wall control short circuit:
Power cycle the operator.
Check WALL CTRL LED on
powerhead main board.
If LED is unlit, a short circuit is
detected on the WALL CTRL
terminals by the main board and the
wall control is disabled.
Turn o AC power and disconnect
batteries (if present). Remove wall
control wiring from main board
terminals. Restore batteries and AC
power.
If WALL CTRL LED remains unlit,
short circuit may be internal to main
board. Replace main board.
If WALL CTRL LED is blinking, short
is in wall control wiring or wall
control. Reconnect wiring to main
board. Disconnect wall control from
wiring. Repeat test.
If WALL CTRL LED is blinking,
short is in wall control. Replace wall
control.
If WALL CTRL LED is o, short is
in wiring. Check wiring and correct
the issue.
Bad connection
between wiring
and wall control
Visually inspect the wiring
connections to the wall control
screw terminals. Wires should be
sandwiched between the screw and
the exposed metallic pads on the
circuit board. Ensure insulated part
of wire is not caught between screw
and circuit board.
Correct any issues noted during
inspection
No voltage output
from powerhead
main board WALL
CTRL terminals
Verify main board WALL CTRL
terminals:
Disconnect wall control wires.
Measure DC voltage at WALL CTRL
terminals.
Voltage should be between 11 and
13V DC.
If voltage is absent or out of range,
turn o power to operator and
disconnect batteries if present. Wait
30 seconds and then reconnect
batteries and reapply AC power.
If fault persists, replace main board
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