Patterson SAMMONS PRESTON R-FLEX User manual

Sammons Preston
W68 N158 Evergreen Blvd.
Cedarburg, WI 53012
A Patterson Company
Phone toll-free: 800-228-3693
Fax: [phone]
[e-mail]
KNEE
SERVICE MANUAL

TABLE OF CONTENTS Sammons Preston CPM Unit
Precautionary Measure........................................................................................................................................1
Maintenance Instruction...................................................................................................................................2-4
Automatic Calibration............................................................................................................................................2
2000 Hour Maintenance Requirement................................................................................................................3-4
Troubleshooting.................................................................................................................................................5-6
Common Problems.................................................................................................................................................5
E01 Error Code.......................................................................................................................................................6
E02 Error Code.......................................................................................................................................................6
E03 Error Code.......................................................................................................................................................6
E04 Error Code.......................................................................................................................................................6
E05 Error Code.......................................................................................................................................................6
Corrective Maintenance...................................................................................................................................7-9
Circuit Board Replacement....................................................................................................................................7
Motor and Gearbox Assembly Replacement.........................................................................................................8
Power Supply Unit Replacement...........................................................................................................................9
R-Flex CPM Exploded View..............................................................................................................................10
R-Flex CPM Parts List.......................................................................................................................................11

PRECAUTIONARY MEASURE Sammons Preston CPM Unit
WARNING: TO REDUCE THE RISK OF ELECTRIC SHOCK:
Always unplug the R-Flex CPM before performing any maintenance procedures involving detaching
CPM components.
A product should never be left unattended when plugged in.
Close supervision is necessary when this product is used by, on, or near children or invalids.
CAUTION: TO REDUCE THE INFLUENCE FROM THE MAGNETIC FIELD:
Always use non-magnetic screwdrivers to remove any fastening screws used on R-Flex CPM unit.
EXPLOSION HAZARD
R-Flex CPM is not designed for use in the presence of flammable anesthetics.
1

MAINTENANCE INSTRUCTION Sammons Preston CPM Unit
2
Calibration Requirements:
1. R-Flex CPM unit must be calibrated when the angle value displayed on the hand controller differs from
the actual value.
2. R-Flex CPM unit must be calibrated whenever maintenance is conducted on major components such as:
potentiometer, power supply unit, circuit board, hand-controller, etc.
3. Consider unit calibration after extended periods of storage or lack of use.
Automatic Calibration Procedure:
1. Turn the power switch to ‘OFF’ position.
2. Adjust the Thigh Support to 18” on the Femur Scale.
(See page 14 of user’s manual)
3. Hold down EXT key and FLX key simultaneously and turn on the power. The code SEL and CAL will
blink in the ‘Extension’ and ‘Flexion’ display windows on the hand controller.
4. Stop pressing the EXT and FLX keys. The unit is now automatically calibrated.
5. The R-Flex CPM unit should be observed traveling to full extension. The reading on the hand controller
in the ‘Range of Motion’ display window should read ZERO when the calibration procedure is completed.
6. After the unit is calibrated, the hand controller can be set and operated as normal.

MAINTENANCE INSTRUCTION Sammons Preston CPM Unit
2000 Hour Maintenance Requirements
Once the R-Flex CPM unit has accumulated 2000 hours of operation, the yellow indicator light on the
hand controller will blink to notify that preventive maintenance is due on the CPM unit.
Maintenance on R-Flex CPM unit must be completed as follows:
1. Using a 4mm allen wrench, disassemble the 8 joints of the CPM bars and inspect the brass bushing
inside each joint.
2. Replace any bushings that appear to be excessively worn.
3. Lubricate all joints lightly with lubricating oil. (Note: Do not use too much oil)
CPM joints incur light loads and slow running speeds, so any class of oil can be used.
4. Using a 4mm allen wrench, remove the top cover of each ball bearing set located at the ends of the
threaded screw. Apply grease to the ball bearings.
3
Note:
Perform a visual inspection on the
ball bearings. If the surface of the
bearing collar or balls are covered
with marks caused by wearing, re-
place the ball bearing immediately.