ultracomfort Leisure UC211 Service Manual page 4

REVA_040412
Component: Extension Wire
Location: Between the lift frame and the chair frame.
Function: Provides connection from the hand control to the motor or control box.
Connections: From the quick disconnect in the pocket to the motor or control box.
Failure Signs: Chair will not lift/recline.
Tests: Test continuity.
Expected Readings: Open Circuit
Serviceable: Must be replaced.
Component: Transformer
Location: Next to chair.
Function: Converts AC to DC. Also provides power during a power failure.
Note: Power during a power failure only applies to the lift/recline or recline only functions.
Connections: Wall outlet and either control box or motor.
Failure Signs: Chair will not operate.
Tests: Test for voltage at connection to chair.
Expected Readings: Approximately 27VDC.
Serviceable: Must be replaced.
Component: Control Box (500-lb. chair only)
Location: On the lift frame.
Function: Provides connectivity for motors, hand control, and
transformer.
Connections: Connected to the motor(s), hand control, and
transformer.
Failure Signs: Chair will not lift and/or recline.
Clicking noise. Motors out of sync.
Tests: AC Voltage
Expected Readings: 27 - 32 VAC. See figure 1.
Serviceable: Must be replaced.
Figure 1. Control Box
Component: Heat Pad
Location: On the chair seat.
Function: Provides heat.
Connections: Connected to the control box.
Failure Signs: No heat.
Tests: Resistance.
Expected Readings: (Far Infrared Heat only, 1 - 6 ohms across the two connector pins).
Serviceable: Must be replaced.
Component: Massage Unit
Location: On the seatback or the seat.
Function: Vibrates to provide massage.
Connections: Connected to the junction box.
Failure Signs: Massage will not work when selected.
Tests: Check for DC voltage
Expected Readings: Approximately 13.8 DC Volts
Serviceable: Must be replaced.
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