(a) If the power cord is not plugged in or the circuit breaker is off, the
action to take to correct the problem, according to the "Corrective Action" column, is to
plug in the cord or turn on the circuit breaker.
(b) If the visual inspection shows the power cord is not unplugged and
the circuit breaker box on, you continue to the next probable cause.
The building power supply is faulty.
(a) Use a voltmeter to check for a reading of 115v or 220v, as
applicable, at the power supply receptacle.
(b) If there is no reading, the problem is with the building power supply.
The corrective action is to notify the proper personnel.
(c) If there is a reading, and the chair still won't operate, you go on to
the next probable cause.
(3) The chair power cord is not plugged into the gray cord at the rear of the
lift. Visually inspect the chair power cord.
(a) If the chair power cord is disconnected, connect it.
(b) If the chair power cord is not disconnected and the chair still doesn't
operate, continue down the "Probable Cause" column.
(4) The four conductor plug on the chair is not securely plugged into the
black coil cord at the rear of the lift (on newer models the chair-base connector is
mounted on the front of the chair. Refer to figure 2-3). Test by visually inspecting the
four conductor plug.
(a) If not securely plugged into the black coil cord, make a secure
(b) If securely plugged, continue to the next probable cause.
(5) The motors are not plugged into the chair electrical junction box. Test
by visually inspecting the chair electrical junction box to see if the three motors are
(a) If the motors are not plugged in, plug in each one.
(b) If they are plugged in, continue to the next probable cause.
(6) The power cord from the electrical junction box and cord for the
programming dials is not securely plugged into the automatic control board. Test by
visual inspection. Refer to figure 2-4.