230 Universal Procedures Chair Tilt Actuator Test and Repair
Tilt Actuator Motor Test
The Tilt Actuator has no serviceable components. If the actuator malfunctions, it must be replaced.
1.Tag, then disconnect tilt actuator wires J7 and J8.
2.Place meter probes on actuator wires. Check meter reading.
|
Meter Reading |
Status |
Required Action |
|---|---|---|
|
1 to 10 Ω |
|
Actuator motor OK, Perform Motor Ground Test |
|
OL or less than 1 Ω |
|
Replace motor |
Tilt Actuator Motor Ground Test
1.Place one meter probe on actuator wire J7. Place other meter probe on PC board ground wire. Check meter reading. Repeat for J8.
|
Meter Reading |
Status |
Required Action |
|---|---|---|
|
OL or more than 1 M Ω |
|
Motor harness OK, Perform PC Board Test |
|
less than 1 Ω |
|
Replace motor |
Tilt Actuator PC Board Test
1.This test cannot be performed with the tilt function in the max. or min. position. If necessary, reposition the tilt function. Refer to: Foot Actuator PC Board Test
2.Move the Foot section halfway between the max. and min. positions.
3.Disconnect tilt actuator wires from J7 and J8.
4.Move brown wire from J6 to J7. Move blue wire from J5 to J8.
The foot limit switches will not stop movement during this test. Do not run past max. / min. positions.
5.Press and hold Tilt Up button for 5 seconds. Does the foot section move up, then stop and beep? If Yes, go to Step 6. If No, replace PC Board.
6.Press and hold Tilt Down button for 5 seconds. Does the foot section move down, then stop and beep? If Yes, PC Board is OK. If No, replace PC Board.
Tilt Actuator Replacement
Do not remove tape from new actuator, until instructed to do so. Doing so will allow the actuator shaft to rotate resulting in misalignment of the internal limit switches
Remove cable ties and wire clamps as necessary.
Removal
1.Disconnect tilt actuator wires from PC board. Pull actuator wire up thru chair.
2.Disconnect tilt limit switch harness 5 from junction board.
3.Remove clevis pin.
4.Remove support strap on Ritter Models only.
5.Remove jam nuts, pivot screws, and actuator.
Installation
1.Install support strap on Ritter models only.
2.Position actuator then install pivot screws, and jam nuts.
Carefully remove tape from actuator shaft. Do not rotate actuator shaft!
3.Install clevis pin and cotter pin.
4.Connect tilt limit switch wire harness to junction board.
5.Route actuator wire thru chair. Connect actuator wires to PC board, brown to J7 and blue to J8.
