Service Information
5
TROUBLESHOOTING GUIDE
The following chart is intended to assist qualified service personnel with identifying and correcting problems
associated with the electrical/pneumatic systems. The schematic diagrams on the following pages should
be used for reference. A volt–ohm meter will be required.
WARNING
Because these problem solving methods may involve interchanging motor plugs or pneumatic air lines to iso-
late the fault or probable cause, the patient should always be removed from the bed before corrective action
is taken.
PROBLEM/SYMPTOM
POSSIBLE CAUSE
RECOMMENDED ACTION
No motors functioning.
No power supply.
Defective power cord or plug.
Defective electrical controller.
Test voltage at wall receptacle
Examine and test for continuity.
Test input and output voltages (see
schematic page 7). Listen for relay
actuation.
One motor not functioning – head,
bed, or foot.
Loose wire at motor plug or recep-
tacle.
Defective motor.
Defective pendant controller.
Defective membrane switch.
Defective electrical controller (circuit
board).
Inspect connectors; check continuity.
Interchange motor plugs to isolate.
Interchange motor plugs to isolate.
Check continuity.
Test input and output voltages (see
schematic page 7). Listen for relay
actuation.
Incorrect travel limits – head, bed or
foot.
Physical blockage of movement.
Defective motor or drive screw.
Motor drive tube out of adjustment.
Visually inspect moving parts.
Replace motor (see pages 9–11).
Reset (see motor replacement–
pages 9–11)
One pneumatic solenoid not func-
tioning – lumbar, seat left or seat
right.
Loose wire at solenoid plug.
Defective solenoid.
Defective pendant controller.
Defective membrane switch.
Defective electrical controller (circuit
board).
Inspect connectors; check continuity.
Interchange solenoid plugs to iso-
late. Replace coil.
Interchange solenoid plugs to iso-
late.
Check continuity.
Test input and output voltages (see
schematic page 7).
No inflation of lumbar, seat left, or
seat right.
Leaking bladder.
Replace head panel–mattress or
seat panel–mattress (see page 15 or
16).
No inflation or deflation of lumbar,
seat left, or seat right.
Kinked lines.
Defective solenoid.
Inspect lines for kinking: re–route, if
necessary.
Interchange solenoid plugs to iso-
late.
No air to operate lumbar, seat left, or
seat right.
Defective compressor.
Loose wire at motor connectors.
Replace compressor (see page 14).
Inspect connectors: check continuity;
test voltage.
Slow filling or emptying of air from
lumbar, seat left, or seat right.
Kinked lines.
Contamination in valves.
Inspect lines for kinking: re–route, if
necessary.
Isolate by switching lines. Replace
manifold (see page 17).
Squeal or noise in lift mechanism Or,
bed motor labors when bed is fully
loaded with 300 pounds.
Dry joints.
Defective counterbalance spring.
See prev. maintenance (page 4).
Check for obstruction, bent rod, or
bent housing. Remove obstruction.
Replace spring (see page 20).
Summary of Contents for 2100
Page 8: ...Schematic Diagram 7 ...
Page 9: ...Nurse Communication Schematic Diagram 8 LEFT SIDERAIL CABLE ...
Page 10: ...Nurse Communication Schematic Diagram 8a THIS WIRE COLORED STRIPE TO BED CIRCUIT BOARD ...
Page 11: ...Notes ...
Page 63: ...DH 2 94 0309 89 00 REV 1 ECN 4619 6300 Sprinkle Road Kalamazoo MI 49001 9799 800 327 0770 ...
