Service manual

HEAD AND FOOT DECK FUNCTION
PROPERLY, BUT ONE OR BOTH HI/LO
MOTORS DOES NOT:
This may occur if for some reason the system
has lost the known position of one or both
of the HI/LO motors. If so, it will need to
be resynchronized to correct it. When this
happens, one or both HI/LO motors may run in
very small amounts if at all. To correct for lost
position:
1. Unplug bed power cord for 15 seconds and
then plug it back in.
2. Press Hand Control Pendant buttons
only in this specic sequence:
a. Press and hold the HI/LO DOWN button
for 15 seconds. This will put the
electronics into resynchronize mode.
b. Push the HI/LO DOWN button and hold it
for 5 seconds; it will likely lower only a
small amount.
c. Release the HI/LO DOWN button for
5 seconds.
d. Press the HI/LO DOWN button again for
5 seconds and repeat at 5 second
intervals until bed has lowered both
HI/LO motors completely to the lowest
bed position.
Note that pressing and releasing
the buttons too quickly will cause
malfunction, and if any other buttons
are pressed, the system will leave the
resynchronize mode and you will
need to start the sequence over.
3. Once you believe the bed is all the way
down:
a. Wait 15 seconds.
b. Press and hold the HI/LO DOWN button
for 15 seconds, then release it for 2
seconds.
c. Press and hold the HI/LO DOWN button
for 5 seconds, then release it.
This is to ensure the bed is truly all the
way down. If either motor moves, repeat
step 3 until no further movement occurs.
If no movement occurs, the system
should now be back in a known position
and the HI/LO Up function should work
properly.
4. If HI/LO problem still continues:
a. Unplug bed power cord.
b. Unplug the two HI/LO Motor Cables at
the control box and replug them into the
control box opposite their original
locations (see control box diagram
below for correct plug locations).
c. Plug in bed power cord and retest.
5. If the same HI/LO motor moves and the
other still does not, replace the HI/LO motor
that does not move.
If only the opposite HI/LO motor moves,
replace the control box. In either case,
the HI/LO function will need to be
resynchronized when the replacement
component has been installed.
If the problem continues, contact
Technical Support at 770-368-4700.
HI/LO (Head)
HI/LO (Foot)
Foot
Head
Control
Cable
GF Health Products, Inc. - www.grahameld.com Zenith 7000 Service Manual 999-0843-190E
ZENITH SERIES
29