OHAUS Frontier FC5706 User manual

SERVICE MANUAL
FC5706 CENTRIFUGE
Ohaus Corporation 7 Campus Drive, Suite 310, Parsippany, NJ 07054, USA [phone]

TABLE OF CONTENTS
Ohaus Corporation www.ohaus.com i FC5706 Centrifuge Service Manual
Page No.
CHAPTER 1 GETTING STARTED
1.1 Introduction..............................................................................................................1-1
1.2 Definition of Signal Warning and Symbol .................................................................1-1
1.3 Safety Precaution.....................................................................................................1-2
1.3.1 User................................................................................................................1-2
1.3.2 Rotor and Accessories....................................................................................1-2
1.3.3 Measures of your protection............................................................................1-2
1.3.4 Exclude the Following environment Influence..................................................1-3
1.3.5 Measures for Operation Safety........................................................................1-3
1.3.6 Danger & Precaution...................................................................................... 1-3
1.4 Service Facilities......................................................................................................1-4
1.5 Tools and Test Equipment's Required......................................................................1-4
1.5.1 Tools and Test Equipment's Required.............................................................1-4
1.6 Transport and packing of FC5706............................................................................1-5
1.6.1 Transport.........................................................................................................1-5
1.6.2 Packing...........................................................................................................1-5
1.7 Technical Data.........................................................................................................1-5
1.7.1 Acceleration and Deceleration Times FC5706.................................................1-5
1.7.2 Imbalance Shut Off Data FC5706....................................................................1-5
1.7.3 Specifications..................................................................................................1-6
1.8 Service Instructions..................................................................................................1-7
1.8.1 General Technical Descriptions.......................................................................1-7
1.8.2 Electrical and Electronic Components.............................................................1-9
1.8.2.1 Control Board.......................................................................................1-9
1.8.2.2 Rotor Recognition...............................................................................1-10
1.8.2.3 Speed Signal......................................................................................1-10
1.8.2.4 Lid Mechanism...................................................................................1-10
1.8.2.5 Imbalance Detection...........................................................................1-11
1.9 LCD Display...........................................................................................................1-12
1.10 Function Label .......................................................................................................1-13
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......................................................................................2-2
2.1.3 Submenu Duty Cycle.......................................................................................2-2
2.1.4 Submenu Running Time..................................................................................2-3
2.1.5 Submenu Software Status...............................................................................2-3
2.1.6 Submenu Error Memory..................................................................................2-4
2.1.7 Submenu Keyboard Test.................................................................................2-5
2.1.8 Submenu Activation/Deactivation of the Imbalance Sensor.............................2-5
2.2 Activation of the Service Menu (Part 2)....................................................................2-6
2.2.1 Centrifuge Model.............................................................................................2-7
2.2.2 Submenu Adjustment/Correction of the Imbalance Cut Off Value....................2-7

TABLE OF CONTENTS
FC5706 Centrifuge Service Manual ii Ohaus Corporation www.ohaus.com
CHAPTER 3 MAINTENANCE PROCEDURES Page No
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 Mounting Support.....................................................................................................3-5
3.3.1 Replacing the Front Housing...........................................................................3-5
3.3.2 Replacing the Incremental Shaft encoder (Potentiometer)...............................3-5
3.3.3 Replacing the Display......................................................................................3-6
3.3.4 Replacing the Foil Key Board..........................................................................3-7
3.3.5 Removing the Housing....................................................................................3-7
3.3.6 Replacing the Rotor Chamber or Lid Gasket...................................................3-8
3.3.7 Removing the Lid............................................................................................3-9
3.3.8 Replacing the Hinges......................................................................................3-9
3.3.9 Replacing the Motor......................................................................................3-10
3.3.10 Replacing the Power Board/Control Board..................................................3-11
3.3.11 Checkup the Imbalance Sensor...................................................................3-11
3.3.12 Replacing the Imbalance (movement sensor) and Speed Sensor ...............3-12
3.3.13 Replacing the Lid Lock................................................................................3-12
3.3.14 Adjustment of the Lid...................................................................................3-13
3.4 Major internal cable connection..............................................................................3-14
3.5 Trouble Shooting....................................................................................................3-16
3.5.1 Error Message: Cause/Solution.....................................................................3-16
3.5.2 Possible Error Message and Their Solutions.................................................3-16
3.5.2.1 Lid Release during Power Failure.......................................................3-16
3.5.2.2 Descriptions of the Error Message.......................................................3-17
3.6 Error Codes............................................................................................................3-18

CHAPTER 1 GETTING STARTED
Ohaus Corporation www.ohaus.com 1-1 FC5706 Centrifuge Service Manual
1.1 INTRODUCTION
This service manual contains the information needed to perform routine maintenance and service
on the Ohaus centrifuge model FC5706.
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
General Hazard
Alternating Current
Electrical Shock Hazard
Biohazard
Corrosive Hazard
Explosion Hazard

CONTENT
Ohaus Corporation www.ohaus.com FC5706 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.

CHAPTER 1 GETTING STARTED
Ohaus Corporation www.ohaus.com 1-1 FC5706 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.
FC5706 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.
1-3

CONTENT
Ohaus Corporation www.ohaus.com FC5706 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 screws drivers, tweezers, adjustable open wrenches and socket set (with
drive socket sets from 4mm-14mm, Ratchet and drive extension bar.)
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CHAPTER 1 GETTING STARTED
Ohaus Corporation www.ohaus.com 1-1 FC5706 Centrifuge Service Manual
1.6 Transporting and Packing of the Centrifuge FC5706.
1.6.1 Transport.
• Please transport the device in the original packaging.
• Use a transport aid for transporting over longer distances.
1.6.2 Packing.
Pack the centrifuge in reverse order using the equipment original packing.

1.7. TECHNICAL DATA
1.7.1 Acceleration and Deceleration times FC5706.
Acceleration values
Deceleration values
Rotor-number
level 0
level 9
level 0
level9
30130880 6x5ml
35
8
25
7
30130877 12x5ml
95
33
257
51
30130878 6x50ml
91
41
274
52
in seconds
Acceleration time
Deceleration time
from 0 min-1 -> Umax
from Umax -> 0 min-1
1.7.2 Imbalance shut-off data FC5706 (120V / 230 V )
Rotor-
number
Shut off speed (approx.
values) in rpm
Permitted imbalance in
gram
Imbalance shut-off in gram
30130877
2750
11
12
30130878
2850
10
11
30130880
2850
4
5
1-5

CHAPTER 1 GETTING STARTED
Ohaus Corporation www.ohaus.com 1-2 FC5706 Centrifuge Service Manual
1.7.3 Specifications.
1-6

CHAPTER 1 GETTING STARTED
FC5706 Centrifuge Service Manual 1-3 Ohaus Corporation www.ohaus.com
1.8 SERVICE INSTRUCTIONS
1.8.1 General technical description
The unit is equipped with several safety features:
•Imbalance detection
•Lid lock does not open until the standstill of the centrifuge
•Rotor over speed protection
After switching on the centrifuge an automatic calibration of the movement
sensor will be done.
Please follow below mentioned safety instructions for any kind of service
actions:
An equipment Redemption Form or Decontamination Certificate 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.
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)
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.
1-7

CHAPTER 1 GETTING STARTED
Ohaus Corporation www.ohaus.com 1-4 FC5706 Centrifuge Service Manual
Equipment Redemption Form or Decontamination Certificate
1-8

CHAPTER 1 GETTING STARTED
FC5706 Centrifuge Service Manual 1-5 Ohaus Corporation www.ohaus.com
1.8.2 Electrical and electronic components
1.8.2.1 Control board
The control board consists of one plate. 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 1: Control board
1-9

CHAPTER 1 GETTING STARTED
Ohaus Corporation www.ohaus.com 1-6 FC5706 Centrifuge Service Manual
1.8.2.2 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.
Do not use a rotor, which isn't set to the control panel.
1.8.2.3 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 2
1.8.2.4 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 magnet, receiving its signal from the control board.
The actual state is indicated in the display (see M1, M2).
Figure 3
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CHAPTER 1 GETTING STARTED
FC5706 Centrifuge Service Manual 1-7 Ohaus Corporation www.ohaus.com
1.8.2.5 Imbalance detection
The imbalance detection is effected by a movement sensor, which is placed on the lower side of
the motor and is controlling the oscillating motion of the motor. The unit stopps when the
oscillating motions are too strong. Therefore you have to follow the adjustment instructions
stated by the manufacturer.
1-11

CHAPTER 1 GETTING STARTED
Ohaus Corporation www.ohaus.com 1-8 FC5706 Centrifuge Service Manual
1.9 LCD Display
The following picture shows the individual elements of the LCD-display.
Figure 4
1-12

CHAPTER 1 GETTING STARTED
FC5706 Centrifuge Service Manual 1-9 Ohaus Corporation www.ohaus.com
1.10 Function label.
The function label consists of one LCD-display, one potentiometer (8), the upper front housing
and the foil keyboard. These parts can be exchanged separate. The potentiometer (1) regulates
all parameters which are adjustable by pressing a key and which are indicated in the LCD-
display. Inside the time display of the control panel the error message is indicated if there occur
any troubles
Figure 5
1-13

CHAPTER 2 SERVICE MENU
FC5706 Centrifuge Service Manual 2-1 Ohaus Corporation www.ohaus.com
2.1 SERVICE MENU
The operation menu helps the service personnel to locate defects. It is divided in two parts,
which are graded in several areas again from chapter 2.1.1 to 2.2.2.
Part 1 is accessible for the USER and different points can be read respectively settled. This is
also described in the instruction manual.
Part 2 is for internal use respectively for OHAUS trained service personnel only.
2.1.1 Activation of the Service Menu (part 1)
The menu can be started as follows:
Open lid of the centrifuge and switch off main switch.
Press the key „time“ (6) and „door open“ (7) hold them and at the same time switch on
the unit.
If the centrifuge is still turned off, press simultaneously the keys „time“ (6) and „lid“ (7) and turn
on the main switch of the centrifuge. Now release both keys again. As a result a display test is
executed for approx. 5 seconds
Figure 1
Now it follows a display test for about 5 seconds as shown here under in figure 8.
Now you have entered the Service mode. By pressing the key „accel/decel“ (5) you will get to
the submenus.
Now in the display “acc/dec“ (A-2) the word “service“ (M12) will flash when you press
Accel/Decel (5) and "service" will stop flashing after 5 sec. Only as long as this word is flashing,
you can scroll through the further submenus with the potentiometer (8).
You have to repeat this step continuously to enter the different submenus.

CHAPTER 2 SEVICE MENU
Ohaus Corporation www.ohaus.com 2-2 FC5706 Centrifuge Service Manual
2.1.2 Submenu Motor Starts
Here you can read off the number of motor starts.
Activate the operation menu as described in chapter 2.1.1.
Turn the potentiometer (8) until the special digit “service A “appears in the display
„acc/dec” (A-2), see figure 9
Figure 2
In the display “rpm/rcf“ (A-1) the number of motor starts is indicated now.
2.1.3 Submenu Duty Cycle
Here you can read off the duty cycle of the unit.
Activate the operation menu as described in chapter 2.1.1.
Turn the potentiometer (8) until the special digit “service H“ appears in the display
“acc/dec” (A-2).
Figure 3
Inside the display “rpm/rcf“ (A-1) now the duty cycle is indicated.

CHAPTER 2 SERVICE MENU
FC5706 Centrifuge Service Manual 2-3 Ohaus Corporation www.ohaus.com
2.1.4 Submenu Running Time
Here you can read off the operating hours of the motor.
Activate the operation menu as described in chapter 2.1.1.
Turn the potentiometer until the special digit “service h“ appears in the display “acc/dec”
(A-2).
Figure 4
In the display “rpm/rcf“ (A-1) the running time of the motor is indicated now.
2.1.5 Submenu software status
Here you can read off the software status.
Activate the operation menu as described in chapter 2.1.1.
Turn the potentiometer (1) until the special digit ”service S“ appears in the display
„acc/dec” (A-2).
Figure 5
In the display “rpm/rcf“ (A-1) the actual software status is indicated now.