www.stryker.com 6390-009-002 REV D 29
Troubleshooting
Cot will not jog up when released from the transport position (Continued)
b. Replace the motor cable (6390-001-431).
c. Replace the angle position sensor (APS) (6390-001-397).
d. Replace the trolley position sensor (TPS) (6390-001-361).
e. Replace the control board assembly (6390-101-014).
Cot will not jog up high enough when released from the transport position
1. Check the angle position sensor (APS) (6390-001-397) calibration set point. Call Stryker Service.
2. Remove the patient right side cover and make sure that the hydraulic cylinder is not “over-stroking.”
Note: Over-stroke condition is evidenced by a ~1/8 in. back settle in the rod of the hydraulic cylinder at full
extension.
3. Check for damage of components in the chain of load bearing parts from the lifting arms to the patient right side
plate (6390-001-344).
Cot takes a long time to jog up
1. Check that the battery voltage is 12.2 VDC.
2. Check the battery cable connections for damage.
3. Check the cable connections to the control board.
4. Replace the hydraulics assembly (6390-001-039).
5. Replace the control board assembly (6390-101-014).
Lifting arms do not lower, but the cot legs extend when you press the extend (+)
button
Make sure that the trolley is powered on.
Make sure that the head end LED indicators are green to confirm that Power-LOAD recognizes the loading position.
If the head end LED indicators are not on
1. Check the trolley control panel LEDs to make sure that the product is on.
Note: The LEDs should appear as a solid green battery symbol with no illumination of error indication.
2. If the trolly control panel LED illuminates solid green only, then the trolley may not see what position it is in.
a. Make sure that the magnet activator (6390-001-106) is present.
b. Make sure that the magnet activator (6390-001-106) is fastened and secure at the foot end of the anchor.
If the head end LED indicators are on
Make sure that the trolley motor is running when you press the cot switch.
1. If the trolley motor is audible, then the problem is with the low pressure relief valve in the trolley hydraulics assembly.
a. Extend the cot legs.
b. Use the trolley manual release to drop the lifting arms until they are no longer supporting the cot.
c. Press the down button on the trolley side panel to finish lowering the arms.
d. If the arm moves, replace the hydraulics assembly (6390-001-039).
2. If the trolley motor is not audible:
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