OHAUS Frontier FC5515R User manual

SERVICE MANUAL
FC5515R CENTRIFUGE
Ohaus Corporation 7 Campus Drive, Suite 310, Parsippany, NJ 07054, USA [phone]

TABLE OF CONTENTS
Ohaus Corporation www.ohaus.com i FC5515R Centrifuge Service Manual
Page No.
CHAPTER 1 GETTING STARTED
1.1 Introduction..............................................................................................................1-1
1.2 Definition of Signal Warning and Symbols................................................................1-1
1.3 Safety and Precautions............................................................................................1-2
1.3.1 User................................................................................................................1-2
1.3.2 Rotor and Accessories....................................................................................1-2
1.3.3 Measures for your protection...........................................................................1-2
1.3.4 Exclude the following environmental influences...............................................1-3
1.3.5 Measures for operational safety ......................................................................1-3
1.3.6 Danger and Precautions..................................................................................1-3
1.4 Service Facilities......................................................................................................1-4
1.5 Tools and Test Equipment Required........................................................................1-4
1.5.1 Standard Tools and Test Equipment...............................................................1-4
1.6 Transporting, Installing, Transferring and Disposing of the Centrifuge FC5515R .....1-5
1.6.1 Transport.........................................................................................................1-5
1.6.2 Packing...........................................................................................................1-5
1.6.3 Unpacking.......................................................................................................1-5
1.6.4 Transferring FC5515R from its original packing box........................................1-5
1.7 Technical Data.........................................................................................................1-7
1.7.1 Acceleration and Deceleration times FC5515R...............................................1-7
1.7.2 Imbalance Shut-off Data FC5515R (120/230V)...............................................1-7
1.7.3 Lowest Temperature FC5515R (120V/230V) in min/sec..................................1-7
1.7.4 Specifications..................................................................................................1-8
1.8 Service Instructions..................................................................................................1-9
1.8.1 General Technical Descriptions.......................................................................1-9
1.8.2 Electrical and Electronic Components...........................................................1-12
1.8.2.1 Power Board.......................................................................................1-12
1.8.2.2 Control Board.....................................................................................1-12
1.8.2.3 Frequency Converter..........................................................................1-13
1.8.2.4 Rotor Recognition...............................................................................1-13
1.8.2.5 Speed Signal......................................................................................1-13
1.8.2.6 Lid Mechanism...................................................................................1-14
1.8.2.7 Imbalance Detection...........................................................................1-15
1.9 LCD Display...........................................................................................................1-16
1.10 Function Label .......................................................................................................1-17
CHAPTER 2 SERVICE MENU
2.1 Service Menu...........................................................................................................2-1
2.1.1 Activation of the Service Menu (Part 1) ...........................................................2-1
2.1.2 Submenu Motor Start......................................................................................2-3
2.1.3 Submenu Duty Cycle.......................................................................................2-3
2.1.4 Submenu Running Time..................................................................................2-4
2.1.5 Submenu Software Status...............................................................................2-4
2.1.6 Submenu Software Status of The Frequency Converter..................................2-5
2.1.7 Submenu Error Memory..................................................................................2-5
2.1.8 Submenu Setup of the Loud Speaker (optional)..............................................2-6
2.1.9 Submenu Setup of the Keypad Tone (optional)...............................................2-7
2.1.10 Submenu Setup Volume of the Loud Speaker (optional)...............................2-8
2.1.11 Submenu Setup of Signal Melody .................................................................2-9

TABLE OF CONTENTS
FC5515R Centrifuge Service Manual ii Ohaus Corporation www.ohaus.com
CHAPTER 2 SERVICE MENU
2.1.12 Submenu Check of the Imbalance Sensor ..................................................2-10
2.1.13 Submenu Keyboard Test.............................................................................2-11
2.1.14 Submenu Indication of the Revision of the Control Panel............................2-12
2.1.15 Submenu Setup for Temperature................................................................2-12
2.2 Activation of the Service Menu (Part 2)……………………………………………. …2-13
2.2.1 Centrifuge Model...........................................................................................2-13
2.2.2 Centrifuge Type.............................................................................................2-14
2.2.3 Submenu Adjustment/Correction of the Imbalance Cut Off Value..................2-15
CHAPTER 3 MAINTENANCE PROCEDURES
3.1 Preventive Maintenance...........................................................................................3-1
3.1.1 General...........................................................................................................3-1
3.1.2 Cleaning and Disinfection of the Unit...............................................................3-2
3.1.3 Cleaning and Disinfection of the Rotor ............................................................3-2
3.1.4 Disinfection of Aluminum Rotor .......................................................................3-3
3.1.5 Disinfection of PP-Rotor..................................................................................3-3
3.1.6 Glass Breakage...............................................................................................3-4
3.2 Service Life of Rotors, Round and Rectangular Buckets, Accessories.....................3-4
3.3 Front Housing ..........................................................................................................3-5
3.3.1 Replacing the Front Housing...........................................................................3-5
3.3.2 Replacing the Incremental Shaft encoder (Potentiometer)...............................3-6
3.3.3 Replacing the Display......................................................................................3-7
3.3.4 Replacing the Foil Key Board..........................................................................3-7
3.3.5 Removing the Housing....................................................................................3-8
3.3.6 Replacing the Lid Gasket ................................................................................3-9
3.3.7 Removing the Lid............................................................................................3-9
3.3.8 Replacing the Hinges....................................................................................3-10
3.3.9 Replacing the Motor......................................................................................3-10
3.3.10 Replacing the Motor Rubber Bearing...........................................................3-11
3.3.11 Replacing the Power Board.........................................................................3-12
3.3.12 Replacing the Frequency Converter............................................................3-12
3.3.13 Checkup the Imbalance Sensor...................................................................3-13
3.3.14 Replacing the Imbalance (movement sensor) and Speed Sensor ...............3-13
3.3.15 Replacing the Temperature Sensor.............................................................3-13
3.3.16 Replacing the Control Board .......................................................................3-14
3.3.17 Replacing the Break Resistor......................................................................3-14
3.3.18 Replacing the Speaker................................................................................3-15
3.3.19 Replacing the Lid Lock................................................................................3-15

TABLE OF CONTENTS
Ohaus Corporation www.ohaus.com iii FC5515R Centrifuge Service Manual
CHAPTER 3 MAINTENANCE PROCEDURES
3.4 Major Internal Cable Connection............................................................................3-17
3.5 Refrigerated System ..............................................................................................3-19
3.5.1 Functional Description of the Cooling System ...............................................3-19
3.5.2 Refrigeration Scheme....................................................................................3-19
3.5.3 Emptying and Filling Refrigeration System....................................................3-20
3.6 Trouble Shooting....................................................................................................3-22
3.6.1 Error Message: Case/Solution.......................................................................3-22
3.6.2 Possible Error Message and Their Solutions.................................................3-22
3.6.2.1 Lid Release during Power Failure.......................................................3-22
3.6.2.2 Descriptions of the Error Message.......................................................3-23
3.7 Error Codes............................................................................................................3-24

CHAPTER 1 GETTING STARTED
Ohaus Corporation www.ohaus.com 1-3 FC5515R Centrifuge Service Manual
1.1 INTRODUCTION
This service manual contains the information needed to perform routine maintenance and service
on the Ohaus centrifuge model FC5515R.
Before servicing the equipment, you should be familiar with the Instruction Manual which is packed
with every equipment.
1.2 DEFINITION of SIGNAL WARNING AND SYMBOLS.
Safety notes are marked with signal words and warning symbols. These show safety issues and warnings.
Ignoring the safety notes may lead to personal injury, damage to the instrument, malfunctions and false
results. The degree of danger is a part of a safety note and distinguishes the possible results of non-
observance from each other.
Signal Words
WARNING
For a hazardous situation with medium risk,
possibly resulting in injuries or death if not
avoided.
CAUTION
For a hazardous situation with low risk, resulting
in damage to the device or the property or in the
loss of data, or injuries if not avoided.
Attention
For important information about the product.
May lead to equipment damage if not avoided.
Note
For useful information about the product.
Warning Symbols
1-1
General Hazard
Alternating Current
Electrical Shock Hazard
Biohazard
Corrosive Hazard
Explosion Hazard

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Ohaus Corporation www.ohaus.com 1-4 FC5515R Centrifuge Service Manual
Warning and information signs on the surface of centrifuge.
1.3 SAFETY PRECAUTIONS.
1.3.1 User
OHAUS centrifuges are intended exclusively for indoor use and for use by qualified personnel. This device
may only be operated by trained specialist staff. They must have carefully read the operating manual and be
familiar with the function of the device.
1.3.2 Rotor and Accessories
Only OHAUS original rotors and accessories shall be used. Any other use or intended use is considered
improper. OHAUS is not liable for damage resulting from improper use.
1.3.3 Measures for your protection
1-2
CAUTION:
Read all safety warnings before installing, making connections, or servicing this equipment.
Failure to comply with these warnings could result in personal injury and/or property
damage. Retain instructions for future reference.
WARNING: Never work in an environment subject to explosion hazards! The
housing of the instrument is not gas tight. (Explosion hazard due to spark
formation, corrosion caused by the ingress of gases)
WARNING: When using chemicals and solvents, comply with the
instructions of the producer and the general lab safety rules.

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Ohaus Corporation www.ohaus.com 1-3 FC5515R Centrifuge Service Manual
1.3.4 Exclude the following environmental influences
Powerful vibrations
Direct sunlight
Atmospheric humidity greater than 80%
Corrosive gases present
Temperatures below 2 °C and above 35 °C
Powerful electric or magnetic fields:
1.3.5 Measures for operational safety
Do not unscrew the two halves of the housing
Dry off any liquid spills immediately! The instrument is not watertight
Only use a power cord with a rating that exceeds the specifications on the equipment label.
Only connect the power cord to a properly grounded power receptable.
Do not position the equipment such that it is difficult to disconnect the power cord from the power
receptacle.
Make sure that the power cord does not pose a potential obstacle or tripping hazard.
The equipment is for indoor use only. Use the equipment only in dry locations.
Use only approved accessories.
Operate the equipment only under ambient conditions specified in these instructions.
Disconnect the equipment from the power supply when cleaning.
Do not operate the equipment in hazardous or unstable environments.
Service should only be performed by authorized personnel
1.3.6 Danger and precautions
To protect people and the environment the following precautions should be observed:
During centrifugation, the presences of people are prohibited within 30 cm around the centrifuge
according to the regulations of EN 61010-2-020.
FC5515R is not explosion-proof and must therefore not be operated in explosion-endangered areas
or locations. Centrifugation of flammable, explosive, radioactive, or such substances, which
Chemically react with high energy, is strictly prohibited. The final decision on the risks associated with
the use of such substances is the responsibility of the user of the centrifuge.
Never spin toxic or pathogenic material without adequate safety precautions, i.e. centrifugation of
buckets / tubes with missing or defective hermetic sealing is strictly prohibited. The user is obliged to
perform appropriate disinfection procedures in case dangerous substances have contaminated the
WARNING: The centrifuge is not sealed. Use suitable protection measures when
using the centrifuge for infectious and pathogenic samples. Follow appropriate
safety precautions when handling these samples.
WARNING:
Electrical shock hazards exist within the housing. The housing should only be opened
by authorized and qualified personnel. Remove all power connections to the unit before
opening.

CONTENT
Ohaus Corporation www.ohaus.com 1-4 FC5515R Centrifuge Service Manual
centrifuge and or its accessories. When centrifuging infectious substances, always pay attention to
the general laboratory precautions. If necessary, contact your safety officer!
It is prohibited to run the centrifuge with rotors other than listed for this unit.
Under no circumstances open the lid of the centrifuge while the rotor is still running or rotating with a
speed of > 2m/s
1.4 SERVICE FACILITIES
To service a centrifuge, the service area should meet the following requirements:
Area must be clean and air must not contain excessive dust particles.
Work surface must be stable and level.
Use an approved Electro-Static Device.
1.5 TOOLS AND TEST EQUIPMENT REQUIRED
1.5.1 Standard Tools and Test Equipment
1. Flat and Philip screw drivers, tweezers, adjustable open wrenches and socket set (with drive
socket sets from 4mm-14mm, Ratchet and drive extension bar.)

CHAPTER 1 GETTING STARTED
Ohaus Corporation www.ohaus.com 1-3 FC5515R Centrifuge Service Manual
1.6 Transporting, Installing, Tramsferring and Disposing of the Centrifuge FC5515R.
1.6.1 Transport.
• Please transport the device in the original packaging.
• The centrifuge should always be transported by two people.
• Use a transport aid for transporting over longer distances.
1.6.2 Packing.
Pack the centrifuge in reverse order using the equipment original packing.
1.6.3 Unpacking
Carefully remove your centrifuge and each of its components from the package. Save the packing to
ensure safe storage and transports.
The rotor should be packed separately.
It is recommended that three or more people should lift the FC5515R. Please refer to section 1.6.4
for details about how to lift it out of the packing.
1.6.4 Transferring FC5515R from its original packing box.
The weight of the centrifuge is about 35 kg. The centrifuge must always be transported by two people.
Opening the carton and lifting out the device.
1. Cut the adhesive tape.
2. Open all 4 flaps of the carton.
3. Remove the accessories.
4. Reach with your hands under the device and lift the centrifuge from the carton with another person.
WARNING: Lifting Hazard. The FC5515R weights approximately 35kg (77lb). Single
person lift could cause injury. Use assistance when lifting or removing the equipment.
1-5

CONTENT
Ohaus Corporation www.ohaus.com 1-4 FC5515R Centrifuge Service Manual
Place the device on a stable, horizontal and non-resonant lab bench before performing servicing.
1. Remove the front and back transport protection material.
2. Remove the plastic sleeve.
Connect the device
1. After taken out the FC5515R from the packing, wait for four hours before switching the centrifuge on in
order to avoid damage to the compressor.
2. Check that the mains voltage and frequency match the requirements on the device name plate(see rear
side of the device) and then connect the device to the power supply.
Remove the transport protection material from the rotor chamber
1. Switch on the device at the mains power switch.
2. Open the centrifuge lid using the open button.
4. Remove the transport protection material.
5. Place the rotor vertically onto the motor shaft.
6. Turn the rotor nut using the rotor key clockwise until the rotor nut is tightened.
1-6

TECHNICAL DATA
Ohaus Corporation www.ohaus.com 1-5 FC5515R Service Manual
1
1.7 TECHNICAL DATA
1.7.1 Acceleration and Deceleration times FC5515R.
1.7.2 Imbalance shut-off Data FC5515R (120V / 230 V)
Rotor-
number
Shut off speed (approx.
values) in rpm
Permitted imbalance in
gram
Imbalance shut-off in gram
30130870
14500
3
4
30130871
8600
3
4
30130872
12700
2
3
30130879
8700
4
5
30130873
8200
5
6
1.7.3 Lowest temperature FC5515R (120V/230V) in min/sec
Rotor-
Number
n-max.
30130870
5°C
30130871
5°C
30130872
6°C
30130879
6°C
30130873
4°C
30130874
5°C
1-7
Note: Please refer to the user manual for the latest specification

CHAPTER 1 GETTING STARTED
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1.7.4 Specifications.
1-8

CHAPTER 1 GETTING STARTED
FC5515R Centrifuge Service Manual 1-15 Ohaus Corporation www.ohaus.com
1.8 SERVICE INSTRUCTIONS
1.8.1 General Technical Description
Model FC5515R is a microprocessor controlled laboratory centrifuge with
refrigerated capability.
The actuation is a three phase asynchronous motor which is controlled by
frequency converter. Model FC5515R has an independent error detection program,
displaying possible errors and therefore supporting the trouble shooting process.
The unit is equipped with several safety features:
•Imbalance detection
•Motor over temperature protection
•Lid lock does not open until the standstill of the centrifuge
•Rotor over speed protection
•Sample over temperature after the end of a run
An equipment Redemption Form or Decontamination Certificates should be available
before servicing the equipment.
Remove all power connections to the unit before opening.
Electrical shock hazards exist within the housing. The housing should only be opened by
authorized and qualified personnel.
The capacitor of the frequency converter can be under voltage even when the unit is
switched off.
Do not leave units unsupervised, when parts of the housing have been removed and the
unit is still connected to the main power supply.
Do not bypass the lid’s safety contacts and never work with the unit’s lid open.
Never work in an environment subject to explosion hazards! The housing of the
instrument is not gas tight. (Explosion hazard due to spark formation, corrosion caused
by the ingress of gases)
1-9
CAUTION: Read all safety warning before installing, making connections, or servicing this
equipment. Failure to comply with this warning could result in personal injury and or/
property damage. Retain all information's for future reference.

CHAPTER 1 GETTING STARTED
Ohaus Corporation www.ohaus.com 1-14 FC5515R Centrifuge Service Manual
When using chemicals and solvents, comply with the instructions of the producer and
the general lab safety rules.
The centrifuge is not sealed. Use suitable protection measures when using the
centrifuge for infectious and pathogenic samples. Follow appropriate safety precautions
when handling these samples.
1-10

CHAPTER 1 GETTING STARTED
FC5515R Centrifuge Service Manual 1-15 Ohaus Corporation www.ohaus.com
Equipment Redemption Form or Decontamination Certificates
1-11

CHAPTER 1 GETTING STARTED
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1.8.2 Electrical and Electronic Components
1.8.2.1 Power Board
The power board is serving the low voltage supply of the centrifuge control system.
The power board is electrically isolated and has a dielectric strength of DC 2.2 kV.
Figure 1: Power board
1.8.2.2 Control Board.
The control board consists of one PCBA. The board can only be exchanged completely. If there
is a defect you have to exchange the complete board.
All signal lines lead to the control board.
The PCB controls the entire centrifuge.
Figure 2: Control board
1-12

CHAPTER 1 GETTING STARTED
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1.8.2.3 Frequency Converter.
The frequency converter generates the drive signals for the asynchronous motor.
The converter leads the current generated by the motor during deceleration to a heating resistor
to reduce the current.
The frequency converter is connected with the power board by a serial interface.
There is a green LED on the converter which light up when the frequency converter is working
correctly.
A defect of the converter will be indicated in the TIME display as an error no. (See chapter 3.5).
1.8.2.4 Rotor Recognition.
The centrifuge will recognize the inputted rotor through the set up in the control panel. As soon
as the lid get closed the rotor number will be indicated in the speed display.
If the pre-selected rpm is higher than the permitted rpm of the rotor, the rpm pre-selection
indication will flash when starting the centrifuge.
But the regulation will accelerate the rotor only to its permitted rpm
1.8.2.5 Speed Signal.
The actual speed is extracted by a hall-effect-sensor placed on the lower side of the motor.
There is a “preset/actual "comparison in the control board. Thereupon a new “actual-signal” is
given by the control board to the converter.
Figure 3: Hall-Effect-Sensor
1-13

CHAPTER 1 GETTING STARTED
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1.8.2.6 Lid Mechanism.
The micro switch in the mechanism of the lid lock controls the correct closing of the centrifuge
lid.
The switch may never be bypassed.
The lid lock is unlatched by an electro motor, receiving its signal from the control board.
The actual state is indicated in the display (see M1, M2).
Figure 4: Lid Mechannism Display and Overlay Layout.
1-14

CHAPTER 1 GETTING STARTED
FC5515R Centrifuge Service Manual 1-15 Ohaus Corporation www.ohaus.com
1.8.2.7 Imbalance Detection.
The imbalance detection is effected by a movement sensor, which is mounted in
the motor and is controlling the oscillating motion of the motor. The unit stops when
the oscillating motions are too strong. Therefore you have to follow the adjustment
instructions stated by the manufacturer.
Figure 5: Imbalance PCBA.
1-15