Drucker Diagnostics Horizon 24 AV-AH User manual

DRUCKER DIAGNOSTICS
HORIZON-24 AH/AV SERVICE MANUAL
SM017
REV A
200 Shadylane Drive
Philipsburg, PA 16866
www.druckerdiagnostics.com
Service Manual
Horizon 24 AV-AH Centrifuge

DRUCKER DIAGNOSTICS
HORIZON-24 AH/AV SERVICE MANUAL
SM017
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Contents
1. PREFACE 2
2. INTENDED USE 2
3. GENERAL DESCRIPTION OF MAJOR COMPONENTS 2
4. WARRANTY INFORMATION 2
5. SPECIFICATIONS 3
6. TROUBLESHOOTING 3
7. SERVICE INSTRUCTIONS 4
8. WIRING DIAGRAM 10
9. SPARE PARTS LIST 11

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1. PREFACE
1.1. The purpose of this manual is to provide the service technician with information for
troubleshooting, testing, and repair of laboratory centrifuge model Horizon 24. Only
qualified technically trained personnel should attempt any of the servicing described in
this document. Failure to follow the procedures in this document may result in personal
injury or instrument damage. Drucker Diagnostics will not be held liable for any injury or
damage because of improper servicing.
1.2. Information contained within this manual is subject to change without notice.
2. INTENDED USE
2.1. This centrifuge is a laboratory product designed to separate components by generation
of relative centrifugal force. It separates human and animal samples –such as blood,
urine and other body fluids -- collected in appropriate specimen receptacles, either alone
or with reagents or other additives. As a general purpose laboratory centrifuge, it is
designed to also run other containers filled with chemicals (non-flammable, non-
explosive, non-volatile, and non-highly reactive only), environmental samples, and other
non-human body samples. This centrifuge should be operated by trained personnel only.
This centrifuge is an IVD accessory, and therefore subject to the former EU IVD Directive
98/79/EC and the current EU IVD Regulation 2017/746. Any use other than those
intended by the Manufacturer is explicitly prohibited. Maximum sample density is 1.15
grams/mL.
3. GENERAL DESCRIPTION OF MAJOR COMPONENTS
3.1. Motor: Brushless DC Motor
3.2. Printed Circuit Board: The PCB is the microcontroller-based control center of the
centrifuge. All control signals are generated in the PCB.
3.3. Lid Locking Tray Assembly: The lid tray assembly contains a solenoid and limit switch that
are used to determine the state of the lid (Open or Closed) and to keep the lid locked
during centrifugation cycles.
3.4. Rotor: The centrifuge rotor is the main component that spins in the centrifuge. The rotor
is loaded with tube holders, and the samples are placed into the tube holders for
processing.
4. WARRANTY INFORMATION
4.1. Drucker Diagnostics warrants its centrifuges to be free from defects in workmanship and
parts for two years.

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5. SPECIFICATIONS
Maximum Speed
2500 RPM
Maximum RCF
1050
Dimensions (in)
9.0 (H) x 15 (W) x 17 (L)
Environmental Operating Range
16-32 deg C
Typical Noise Level (At Maximum Speed)
< 59 dB A
Electrical Rating
95-253 VAC
6. TROUBLESHOOTING
PROBLEM
POSSIBLE CAUSE
SOLUTION
The lid does not open.
No Power
Check removable line cord or wall outlet.
Lid knob is ajar
Rotate the lid knob fully clockwise before pressing the
‘UNLOCK’ button
Lid lock is active (Unlock timed out)
Press the ‘UNLOCK’ button to de-activate the lid
Lid tray is unplugged from PCB or
defective
Requires service
PCB is damaged
Requires service
To gain access to the rotor - Remove the label directly in
front of the lid knob and slide the lid latch lever toward
the front of the centrifuge. This will unlock the lid.
PROBLEM
POSSIBLE CAUSE
SOLUTION
Excessive vibration
Rotor improperly loaded
Load equally filled tubes symmetrically in the rotor. All
carriers and/or tube holders must be present in the
rotor, whether loaded, or empty.
Debris lodged within the rotor or
tube carriers
Carefully inspect all rotor pockets, tube holders and
crevasses for debris.
Centrifuge housing is loose
Requires service
Missing/damaged feet
Requires service
Motor failure
Requires service
Rotor damaged
Replacement required
PROBLEM
POSSIBLE CAUSE
SOLUTION
Rotor does not spin
No Power
Check removable line cord
No Power
Check circuit breaker on underside of centrifuge.
No Power
Check wall outlet
Lid not properly latched
Press down firmly on lid and rotate lid knob fully
clockwise.
Internal connection failure
Requires service
PCB failure
Requires service
Motor Failure
Requires service
PROBLEM
POSSIBLE CAUSE
SOLUTION
Clicking noise during braking
Rotor is loose
Tighten rotor screw per section 7-2
PROBLEM
POSSIBLE CAUSE
SOLUTION
Whistling noise while running
Debris in air intake / exhaust ports
Remove power before clearing debris.
Gasket failure
Requires service
PROBLEM
POSSIBLE CAUSE
SOLUTION
Cycle ends prematurely. The centrifuge reports
the error in a repeating BUZZ / BEEP sequence
BALANCE ERROR
Rotor improperly loaded
Load equally filled tubes symmetrically in the rotor.

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1 ERROR BUZZ + 2 REPEATING BEEPS
Debris lodged within the rotor or
tube carriers
Carefully inspect all rotor pockets, tube holders and
crevasses for debris.
Rotor damaged
Replacement required
LOW SPEED ERROR
2 ERROR BUZZES + 2 REPEATING BEEPS
Rotor Speed is under set speed for
too long.
Check the lid and guard bowl gaskets. Voids in the rotor
chamber gaskets change the airflow, resulting in
increased stress on the motor drive
OVERCURRENT ERROR
3 ERROR BUZZES + 3 REPEATING BEEPS
Motor or PCB failure
Service Required
NO RPM ERROR
6 ERROR BUZZES + 4 REPEATING BEEPS
Sensor not connected to PCB
Check connections
Sensor failure
Replace motor
Locked rotor
Service Required
EEPROM ERROR
2 ERROR BUZZES + 6 REPEATING BEEPS
PCB failure
Replace PCB
ACCELEROMETER ERROR
2 ERROR BUZZES + 7 REPEATING BEEPS
PCB failure
Replace PCB
MOTOR DRIVE ERROR
2 ERROR BUZZES + 9 REPEATING BEEPS
PCB failure
Replace PCB
7. SERVICE INSTRUCTIONS
7.1. Cleaning
•The cabinet, rotor and accessories can be cleaned using soap and water, isopropyl
alcohol, or a 10% (5500 PPM) bleach solution
•Apply cleaning solutions with a towel or cloth. Do not submerge the centrifuge in
water or other cleaning solutions as this will cause damage and void the warranty.
•Under no circumstances should any of the following be used: TBQ Germicidal
Products, Fully/Partially Halogenated Hydrocarbons, Ketones or Esters.
•The use of any chemicals not prescribed by the manufacturer may cause damage
to the rotor and tube carriers and shall not be used.
7.2. Removing the Rotor
•Use a 1/8” hex key to loosen the center rotor screw (turn counter-clockwise).
•Lift the rotor straight up and out of the rotor chamber.
•To install the rotor, reverse steps A and B above. Take care to align the shaft cross-
pin with the rotor hub. Tighten the rotor screw to 3.5 Nm.
7.3. Maintaining the Rotor
•Keep the rotor clean, any corrosive materials must not be allowed contact with the
rotor and should be cleaned immediately.
•The rotor should be checked periodically for signs of wear.
•Remove the rotor from service if any of the following are found: cracks, deep
scratches, corrosion or discoloring.
7.4. Rotor Screw
•If the rotor screw needs to be tightened, use a 1/8” hex key and tighten to 3.5 Nm.
7.5. Speed Calibration
•Check the centrifuge speed periodically, every two years is recommended.
•Important: When verifying rotor speed, make certain that all carriers are installed
in the rotor.

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•No calibration adjustment of speed can be made, only a verification of rotor speed.
7.6. Removing the Cabinet (Upper Housing)
•There are eight screws that fasten the centrifuge cabinet to the base.
•Begin by unplugging the centrifuge.
•Use a #2 Phillips screwdriver to remove the cabinet screws (three on left and right
sides, two in the rear)
•The cabinet control panel is attached to the base internally with cable harnesses.
Be careful not to stress the cables when removing the cabinet.
•Stand directly in front of the centrifuge and lift the cabinet straight up and off the
base, setting it down on its right side.
•Gently remove the power supply and motor harnesses from the PCB.
7.7. Replacing the Lid Lock Assembly
•The lid tray assembly is accessible once the cabinet has been removed.
•Gently remove the lid tray wire harness from the PCB.
•The lid tray assembly is held in place with two #6 Nylok nuts. Use a 5/16” nut driver
to remove the nuts. The tray will slide off the threaded studs.
•To install the lid tray, slide it onto the studs, and secure it with two #6 Nylok nuts,
hand tight.
•Complete the installation by gently plugging the wire harness into the PCB header
‘J2’. The header and connector are keyed for proper orientation.
7.8. Replacing the PCB
•The PCB is accessible once the cabinet has been removed. Make certain that all
wire harnesses have been disconnected. Use standard precautions for handling
static sensitive components.
•The PCB is held in place with six #6 Nylok nuts and plastic insulator washers. Use a
5/16” nut driver to remove the nuts. The PCB and washers are now free to slide off
the threaded studs.
•Beneath the PCB are six plastic standoffs. If they are crushed, replace them before
reassembly.
•To install the PCB, make certain that six plastic standoffs are present on the control
panel studs.
•Slide the board onto the studs
•Install six plastic washers onto the studs securing the circuit card.
•The six nuts should be tightened only until the buttons on the control panel click
when pressed –do not over tighten. Each nut sets the height of a separate control
panel button. Too low, and they cannot be actuated, too high and they jam against
the front panel label and are always in the ‘ON’ state. Tighten each nut a ¼ turn in
succession, trying each corresponding button as you go.
•Once each control panel button clicks when pressed, installation is complete.

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7.9. Removing the motor
•Remove the cabinet assembly by following 7.8
•Cut and remove all wire harness zip ties.
•Flip the base assembly up-side down and remove the three exhaust air channel
screws with a #2 Phillips driver.
•Set the exhaust cover aside
•The guard bowl is held in place with six #8 screws. Remove them with a #2 Phillips
driver.
•Lift the base assembly off the guard bowl and set it aside.
•The motor assembly is held in place with 3 #8 Nylok nuts and fender washers.
Remove the nuts with an 11/32” nut driver.
•Remove the three fender washers.
•Lift the motor assembly up and off the studs.
•The motor is secured to the mounting plate with 4 #8 screws. Use a # 2 Philips
driver to remove the screws.
7.10. Replacing the motor
Fig 1 Fig 2
•Place the motor onto the motor mount plate and thread the motor wires into the
cutout as shown (fig 1).
•Attach the motor to the motor mount plate with four #8 SCREWS and torque to 18
in-lbs (Fig 2).
•Secure the motor wire harness with a zip tie as shown. Snip the tag end of the zip
tie flush when complete.

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Fig 3 Fig 4 Fig 5
•Insert the Elastomer bushings into the motor mount plate as shown (fig 4).
•Push the grommets onto the bushings as shown (fig 5).

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Fig 6 Fig 7 Fig 8
•Place one Aluminum spacer 30-000112 onto each stud as shown (fig 6).
•Install the motor mount assembly onto the guard bowl studs so that the motor
wire tiedown is positioned opposite of the guard bowl splice (fig 7).
•Install one fender washer onto each stud (fig 8).
•Finish the assembly with one Nylok nut on each stud, and tighten to 13 in-lbs
Fig 9 Fig 10
•Place the base assembly onto the guard bowl assembly 02-003-0-0052 with the
guard bowl splice positioned as shown (fig 9).
•Feed the motor wire harness into the base passthrough so that the wire harness is
not pinched between the base and the guard bowl (fig 10).
Tiedown
SPLICE
SPLICE
THIS SIDE

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Fig 11 Fig 12
•Secure the base with six #8 screws torqued to 10 in-lbs. (fig 11).
•Install the exhaust cover and secure with three #8 screws torqued to 10 in-lbs. (fig
12).
7.11. Power Connections and Final Assembly
•Plug the power harness into J17
•Plug the motor harness into J10 (Hall Sensors) and J14 (Motor power)
•Plug the lid lock harness into J2
•Plug the cycle counter harness into J3
•Carefully place the cabinet onto the base taking care not to pinch any wires
between the two.
•Complete the assembly by replacing the eight #8 screws, washers and lock washers
with a #2 Phillips driver

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8. WIRING DIAGRAM

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9. SPARE PARTS LIST

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