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3006-409-006 REV C
29
Problem / Failure
Recommended Action
No bed down motion.
A. Enter diagnostics (see Scale System Diagnostics and
Calibration section) and press bed down.
a. If motion is not present, verify the two wire
connection is present on connector Z.
1.
Test bed down motion; if motion is present
then go to step D.
b. If motion is present, re-burn lift potentiometer limits
(see Lift Potentiometer “Burn-In” Procedure).
B. Check for 5VDC on TP 9 (HL) and TP 7 (FL); reference
ground test point while pushing the bed down button.
a. If 5VDC is present, go to step C.
b. If 5VDC is not present, replace CPU board.
C. Check for 230VAC power on connector N (HL) and G
(FL), pin 1 white and pin 3 black, of the CPU board,
while pressing bed motion up.
a. If voltage is not present, replace CPU board.
b. If voltage is present:
1.
Verify the motors are running, if so, replace
lift couplers.
2.
If motors are not running, check voltage at
motor connection.
3.
If voltage is present at motor, check capacitors
or motors.
D. Verify bed function and return to service.
No bed up motion.
A. Enter diagnostics (see Scale System Diagnostics and
Calibration section) and press bed up.
a. If motion is not present, got to step B.
b. If motion is present, re-burn lift potentiometer limits
(see Lift Potentiometer “Burn-In” Procedure).
B. Check for 5VDC on TP 10 (HL) anf TP 8 (FL) on the
CPU board; reference ground test point while pushing
the bed up button.
d. If 5VDC is present, go to step C.
e. If 5VDC is not present, replace CPU board.
C. Check for 230VAC power on connector N (HL) and G
(FL), pin 1 white and pin 6 red, of the CPU board while
pressing bed motion up.
a. If voltage is not present, replace CPU board.
b. If voltage is present:
1.
Verify the motors are running, if so, replace
lift couplers.
2.
If motors are not running, check voltage at
motor connection.
3.
If voltage is present at motor, check capacitors
or motors.
D. Verify bed function and return to service.
Troubleshooting Guide
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