630 Chair Foot Actuator / Limit Switches Test and Repair
This illustration shows the foot limit switches and the serviceable components of the foot actuator. Use the table below to isolate the malfunction.
Anytime the limit switch wires or the actuator wires are disconnected, the PC Board must be calibrated.
Limit Switch Stops are preset at factory. Do not adjust or damage to chair may occur.
Anytime an Overtravel Limit Switch is detected open, both Up and Down functions are deactivated.
| Problem | Required Action |
|---|---|
| Motor runs, but makes grinding noise | Clean / lube actuator threads. Lube threads w/lithium grease. Replace actuator if necessary. |
| Motor runs, but chair does not move | Inspect / replace motor coupler. |
| Motor does not run | Test Limit Switch(es). Refer to: Foot Actuator Test |
Foot Actuator Test
The wire connections and wire routing must be put back in original locations before installing covers.
Failure to move all three connections may result in damage to chair.
1.Disconnect power to the chair.
2.Disconnect Tilt actuator connections.
3. Move Foot wire connection J2 to Tilt PC Board connection J6.
4.Move Foot wire connection J3 to Tilt PC Board connection J7.
5.Move Foot wire connection J4 to Tilt PC Board connection J8.
6.Connect power to chair.
7.Using the hand / foot control press and hold Tilt up button briefly and then press and hold Tilt down button briefly. Did Foot move Up and Down in Step 2? If yes, Actuator is Ok. If no, Refer to: Foot Actuator Motor Resistance Test.
8.Reconnect Foot actuator connections.
9. Reconnect Tilt actuator connections.
10.Calibrate Chair. Refer to: Calibration Procedure
Foot Actuator Motor Resistance Test
Anytime actuator wires are disconnected, the chair must be calibrated.
1.Disconnect power to the chair.
2.Disconnect foot actuator from J2 on PC Board.
3.Set multimeter to Ohms and check resistance.
If any of the readings are less than two Mega Ohms after three seconds, the motor is defective.
a.Place the Red meter probe on the Black wire, and the Black meter probe on the Blue wire.
b.Place the Red meter probe on the Black wire, and the Black meter probe on the Green wire.
c.Place the Red meter probe on the Black wire, and the Black meter probe on the White wire.
