Install guide

19
Status
Query Action
DC1000
Does Not
Change
Elevation
Lights
on upper
display?
Refer to No Lights
on Display
flowchart
No
Elev. Arrows
change values on
display?
Yes
Replace
membrane.
No
Refer to Test Mode instructions in
Section V. Advance to Elevation
Test parameter. Resume Flowchart
Troubleshooting.
D9 illuminates
when Elev. Up
button pressed?
D8 illuminates
when Elev. Down
button pressed?
Telcos &
connections
good?
Telcos &
connections
good?
Replace Telcos.
Replace Display PCB.
No No
YesYes
Yes
No No
Motor
descends?
Motor
elevates?
Yes
Yes
Fuses good? * Fuses good? *Replace fuse.
105-125
VAC at JP9
across Up &
Com?
105-125
VAC at JP9
across Down
& Com?
Continuity
across green &
red limit switch wires.
Test at terminal block
screws.
Continuity
across black & white
limit switch wires. Test
at terminal block
screws.
Motor
cont. to fuse
block elev. wires &
connections
good?
Motor
cont. to fuse
block elev. wires
& connections
good?
Fix or replace wire or
connection.
Starter
capacitor and
connections
good?**
Starter
capacitor and
connections
good?**
No
Replace motor
controller (lower
board).
Fix connection or replace
starter capacitor.
Replace elevation motor.
If numbers don’t change in the
Elevation Display window,
replace Elev. Potentiometer.
Yes
No
No
Yes
No
No
Yes
Yes
No
Yes
No
No
Yes
No
Yes
No
Yes
* If the unit continually blows fuses, replace the motor controller (lower board).
** If you have a four wire elevation motor, your starter capacitor should measure
24.5-25.5 uf across the two lead wires. If you have a three wire elevation motor,
your capacitor should measure 34.5-35.5 uf across wire leads.
Note
Fix or replace limit
switch cable or
connection. If cable
and connections are
good, replace the limit
switch.
Yes
No
Yes Yes
No
Yes