EN-10
Cleaning
The Controller cabinet can be cleaned with a soft cloth dampened with water. If necessary, a mild disinfectant and/or detergent can be used; excess
fluid should be avoided. The Controller should be wiped with a clean, dry cloth afterward. Do not immerse in any liquid. Do not use products
containing ammonium chloride, acetone or other aromatic solvents, as those chemicals will degrade the integrity of the case and cause it to become
embrittled and possibly crack.
The SCD EXPRESS Compression System cannot be effectively sterilized by liquid immersion, autoclaving, or ETO sterilization, as irreparable damage to
the System will occur.
Electrical/Electronics Description
Line voltage is fed into the controller through the power cord to the power supply mounted on the Power Supply PC Board in the rear case of the
controller. It is important to disconnect the power cord at the outlet before opening the controller case. Exposure to high voltage on the Power Supply
PC Board is likely to occur if it is electrically live.
The power supply converts AC line voltage, 100 to 240 VAC, to DC voltage to power the controller components, including the main Controller PC Board
that is mounted onto the front case. Alternately, the main Controller PC Board may be directly powered by the optional battery pack. The Controller PC
Board controls all functionality of the system and includes the transducer and buzzer. It does not contain any high voltage. The buttons and indicator
LED’s on the front display of the controller are integrated into the membrane panel which connects to the Controller PC Board.
Kendall does not recommend any attempt to repair printed circuit boards. In manufacturing, extensive testing is performed that cannot be duplicated in
the field without specialized equipment. Improper repair could result in patient or user hazards.
Pneumatic Operation Description
When the controller is turned on, the compressor operates and the valves are cycled to determine which type of garment is connected. After garment
detection has completed, an inflation cycle is initiated, releasing air through the set of valves, mounted to a manifold. A transducer monitors the
pressure in the garments. The reading from the transducer assists the controller in adjusting the pump’s motor speed to deliver the proper pressure to
the garments in the appropriate amount of time.
Section V - Test Methods and Calibration
The SCD EXPRESS Compression System has various test modes that can be accessed by the service technician. They are intended for use by qualified
personnel. To activate the test modes follow these steps for entering “Test Access Mode”.
1. Plug the controller into an outlet supplying the appropriate line voltage. Do not activate the test modes while operating on battery power.
2. Press the Port A and Port B configuration buttons at the same time while turning the controller on.
3. The buzzer will beep and the Test Mode 01 indicator will illuminate signifying “Test Mode 01”.
NOTE:
The Error Code Indicators 1-8 double as Test Mode Indicators 1-8.
4. The user can cycle through the test modes by pressing the Port A button. Each test mode is indicated by the illumination of the corresponding test
mode indicator number. Pressing the Port A button with the last test mode number illuminated (Test Mode 08) will cycle the test mode back to Test
Mode 01.
5. After selecting the desired test mode, the Port B button can be pressed to initiate the test.
6. If test access is entered but no test mode is selected within 2 minutes, it is assumed that the test access mode was entered inadvertently and a Low
Pressure alarm will be triggered.
7. If a test mode is entered and left idle for 5 minutes the unit will revert back to test access mode selection.
8. To exit Test Access Mode, turn the controller off.
Test Mode 01 - Burn-In
NOTE:
Burn-In mode is used in manufacturing to ensure proper assembly, to identify premature failures and to calibrate the battery pack.
This mode is not generally used outside of the manufacturing environment.
1. Verify nothing is plugged into the ports on the back of the controller and enter test access mode. Select Test Access Mode 01.
2. Press the Port B button to begin Burn-In. The compressor will operate and the valves will actuate, releasing air out of the ports. The process repeats
continuously until the Burn-In period is complete (approximately 16 hours).
3. The battery, if equipped, will be discharged then charged for calibration during Burn-in.
4. When 16 hours of Burn-In is completed the controller will go into alarm mode, flashing Test Access Mode 01 red, and the Port A Leg , Port A Foot,
Port B Leg, Port B Foot indicators green. The buzzer will not pip during this alarm.
