OHAUS Frontier FC5816 User manual

GETTING STARTED
Page 1 of 53
SERVICEMANUAL
© OHAUS Corporation
Service Manual
for
FC5816/FC5816R

Table of Contents
1 GETTING STARTED.....................................................................................................................4
1.1 INTRODUCTION.....................................................................................................................4
1.2 DEFINITION OF SIGNAL WARNING AND SYMBOLS........................................................... 4
1.3 SAFETY PRECAUTIONS ....................................................................................................... 5
1.3.1 User..................................................................................................................................5
1.3.2 Rotor and Accessories......................................................................................................5
1.3.3 Measures for your protection............................................................................................5
1.3.4 Exclude the following environmental influences............................................................... 6
1.3.5 Measures for operational safety ....................................................................................... 6
1.3.6 Danger and precautions ................................................................................................... 6
1.4 SERVICE FACILITIES........................................................................................................7
1.5 TOOLS AND TEST EQUIPMENT REQUIRED .................................................................. 7
1.5.1 Standard Tools and Test Equipment........................................................................... 7
1.6 Transporting and Packing Centrifuge FC5718/R .................................................................... 7
1.6.1 Transport ..........................................................................................................................7
1.6.2 Packing.............................................................................................................................7
1.7 TECHNICAL DATA.............................................................................................................7
1.7.1 Acceleration times........................................................................................................... 7
1.7.2 Deceleration times..........................................................................................................8
1.7.3 Imbalance shut off data...................................................................................................9
1.7.4 Specifications..................................................................................................................11
1.8 SERVICE INSTRUCTIONS.............................................................................................. 13
1.8.1 General technical description........................................................................................ 13
1.8.2 Electrical and electronical components......................................................................... 13
1.8.2.1 Power board .......................................................................................................... 13
1.8.2.2 Control board (PCB) ..............................................................................................13
1.8.2.3 Control panel ......................................................................................................... 13
1.8.2.4 Frequency converter..............................................................................................14
1.8.2.5 Rotor recognition and over speed protection......................................................... 14
1.8.2.6 Speed signal..........................................................................................................14
1.8.2.7 Lid contact .............................................................................................................15
1.8.2.8 Imbalance detection............................................................................................... 15
2 SERVICE MENU .....................................................................................................................16
2.1 Activation of the operation menu......................................................................................16
2.1.1 Submenu Motor starts:.................................................................................................. 16
2.1.2 Submenu Duty cycle..................................................................................................... 17
2.1.3 Submenu Running time of the motor............................................................................ 17
2.1.4 Submenu Software status.............................................................................................17
2.1.5 Submenu Software status of the frequency converter.................................................. 18
2.1.6 Submenu Error memory................................................................................................ 18
2.1.7 Submenu Setup of the temperature (for refrigerated units only)................................... 19
2.1.8 Submenu Setup of the signal generator ....................................................................... 20
2.1.9 Submenu Setup of the keypad tone.............................................................................. 21
2.1.10 Submenu Setup volume of the signal generator....................................................... 22
2.1.11 Submenu Setup of the signal melody........................................................................ 22
2.1.12 Submenu Check and calibration of the imbalance sensor ........................................ 23
2.1.13 Submenu Indication of the imbalance value of the rotor........................................... 24
2.1.14 Submenu Keyboard test............................................................................................24
2.1.15 Submenu Indication of the revision number of the control panel .............................. 25
2.2 Activation of the Service menu (Part 2)............................................................................ 25
2.2.1 Submenu Adjustment of the centrifuge type................................................................. 25
2.2.2 Submenu Adjustment of the operation mode................................................................ 26
2.2.3 Submenu Adjustment/Correction of the imbalance cut off value.................................. 27
3 MOUNTING SUPPORT...........................................................................................................29
3.1 Replacing the front housing, the incremental shaft encoder, the display and the foil
keyboard......................................................................................................................................29
3.2 Removing the housing and the lid gasket GLUED........................................................... 31
3.3 Removing the lid and the hinges......................................................................................32

GETTING STARTED
Page 3 of 53
SERVICEMANUAL
© OHAUS Corporation
3.4 Removing the hinges.............................................................................................................33
3.5 Replacing the motor and the aerial .......................................................................................33
3.6 Replacing the power board............................................................................................... 35
3.7 Replacing the frequency converter...................................................................................36
3.8 Checkup the imbalance sensor........................................................................................ 37
3.9 Replacing the control board ..................................................................................................38
3.10 Replacing the break resistor................................................................................................39
3.11 Replacing the lid lock .......................................................................................................... 39
3.12 Replacing the rotor sensor..................................................................................................40
3.13 Replacing the temperature sensor (FC5816R only)............................................................ 41
3.14 Refrigeration system (FC5816R only)................................................................................. 42
4 TROUBLE SHOOTING............................................................................................................45
4.1 Error messages: Cause / Solution......................................................................................... 45
4.2 Survey of possible error messages and their solutions.................................................... 45
4.2.1 Lid release during power failure (Emergency Lid Release).......................................... 45
4.2.2 Description of the error message system ..................................................................... 46
4.2.3 Errors that may be indicated in the LCD display............................................................. 46
5 MAINTENANCE.......................................................................................................................49
5.1 Service and maintenance.................................................................................................49
5.1.1 Maintenance and cleaning............................................................................................49
5.1.2 Cleaning and disinfection of the unit...............................................................................50
5.1.3 Cleaning and disinfection of the rotor.............................................................................50
5.1.4 Disinfection of aluminium-rotors .....................................................................................50
5.1.5 Disinfection of PP-rotors.................................................................................................50
5.1.5 Glass breakage...............................................................................................................51
5.1.6 Lifetime of rotors, round and rectangular buckets, accessories ..................................... 51

GETTING STARTED
1 GETTING STARTED
1.1 INTRODUCTION
This service manual contains the information needed to perform routine maintenance and service
on the Ohaus centrifuge model FC5816/FC5816R.
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 products.
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

GETTING STARTED
Page 5 of 53
SERVICEMANUAL
© OHAUS Corporation
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.
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.

GETTING STARTED
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.
•FC5816/FC5816R 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 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
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.

GETTING STARTED
Page 7 of 53
SERVICEMANUAL
© OHAUS Corporation
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.)
1.6 Transporting and Packing Centrifuge FC5816/FC5816R
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 times
FC5816(120 V / 230 V) in seconds
Rotor-
Number
Level
0
Level
1
Level
2
Level
3
Level
4
Level
5
Level
6
Level
7
Level
8
Level
9
30314821
567
69
30314826
463
52
30314827
403
42
30314831
437
45
30314836
509
51
30314839
291
30
30314832
111
13
30314820
182
20
30314824
181
19
30314833
386
40

GETTING STARTED
FC5816R(120 V / 230 V) in seconds
Rotor-number
Level 0
Level 1
Level 2
Level 3
Level 4
Level 5
Level 6
Level 7
Level 8
Level 9
30314821
11:04
5:36
3:46
2:55
2:35
2:14
2:12
2:10
2:10
2:10
30314826
13:25
6:51
4:36
3:40
2:59
2:33
2:23
2:13
2:10
1:58
30314827
8:26
4:05
2:45
2:01
1:38
1:22
1:12
1:05
1:01
1:00
30314831
7:26
3:40
2:24
1:50
1:28
1:14
1:03
0:56
0:51
0:48
30314838
3:51
1:55
1:16
0:57
0:46
0:38
0:33
0:29
0:26
0:26
30304361
3:55
1:55
1:16
0:57
0:46
0:38
0:33
0:30
0:28
0:27
30314832
2:39
1:16
0:51
0:39
0:32
0:28
0:25
0:25
0:25
0:25
30314820
5:09
2:40
1:47
1:23
1:06
0:55
0:47
0:41
0:37
0:34
30314824
7:12
3:27
2:18
1:44
1:21
1:10
0:60
0:52
0:46
0:43
30314833
8:32
4:05
2:43
2:03
1:38
1:22
1:11
1:03
0:57
0:54
30314829
12:33
6:55
4:01
3:06
2:35
2:17
2:07
2:01
1:54
1:55
30314835
4:34
2:14
1:30
1:08
0:54
0:46
0:40
0:36
0:33
0:31
30314828
5:07
2:46
1:53
1:29
1:05
0:54
0:47
0:43
0:37
0:34
1.7.2 Deceleration times
FC5816(120 V / 230 V) in seconds
Rotor-
Number
Level
0
Level
1
Level
2
Level
3
Level
4
Level
5
Level
6
Level
7
Level
8
Level
9
30314821
1457
84
30314826
1083
61
30314827
794
52
30314831
516
46
30314836
337
55
30314839
223
45
30314832
452
20
30314820
309
25
30314824
388
24
30314833
626
42

GETTING STARTED
Page 9 of 53
SERVICEMANUAL
© OHAUS Corporation
FC5816R(120 V / 230 V) in seconds
Rotor-number
Level 0
Level 1
Level 2
Level 3
Level 4
Level 5
Level 6
Level 7
Level 8
Level 9
30314821
48:26
6:53
4:36
3:27
2:46
2:19
2:01
1:46
1:32
1:23
30314826
27:29
6:10
4:07
3:05
2:25
2:01
1:45
1:32
1:22
1:16
30314827
29:05
3:40
2:24
1:49
1:27
1:12
1:02
0:55
0:49
0:44
30314831
22:03
3:31
2:18
1:46
1:25
1:10
1:01
0:54
0:49
0:44
30314838
6:32
1:56
1:17
0:58
0:46
0:39
0:34
0:30
0:26
0:23
30304361
8:10
1:56
1:17
0:58
0:47
0:39
0:34
0:30
0:27
0:24
30314832
16:25
1:19
0:52
0:40
0:32
0:27
0:24
0:22
0:20
0:19
30314820
7:38
2:47
1:53
1:25
1:08
0:56
0:49
0:43
0:39
0:36
30314824
10:16
3:00
2:04
1:31
1:13
1:02
0:53
0:47
0:42
0:38
30314833
23:59
3:27
2:15
1:42
1:23
1:08
0:59
0:52
0:47
0:42
30314829
39:45
5:18
3:29
2:40
2:07
1:45
1:31
1:20
1:12
1:05
30314835
8:05
2:06
1:25
1:04
0:52
0:45
0:38
0:34
0:31
0:29
30314828
8:07
2:47
1:53
1:25
1:08
0:56
0:49
0:44
0:39
0:35
1.7.3 Imbalance shut off data
FC5816(120 V / 230 V)
Rotor-
Number
Shut off speed
in rpm
permitted
imbalance
in gram
Imbalance shut off
in gram
30314821
1500
6
7
30314826
1500
7
8
30314827
1400
4
6
30314831
1500
4
6
30130872
1500
3
5
30314839
1000
3
5
30314832
1500
8
10
30314820
1300
9
11
30314824
1400
8
10
30314833
1400
4
6
The acceleration and deceleration times may have slight fluctuations that depend on the
unit and are therefore guidelines only.

GETTING STARTED
FC5816R (120 V / 230 V)
Imbalance adjusted with the mechanical micro switch. This rotors has to be adjusted with the mechanical micro
switch.
Rotor-number Shut off speed (approx.
values) in rpm
Permitted imbalance in
gram
Imbalance shut-off in
gram
30314820
1630
9
11
30314824
1940
10
11
30314828
1730
14
15
Rotors where the Imbalance follow movement sensor.
Rotor-number Shut off speed
(approx. values) in
rpm
Permitted imbalance in
gram Imbalance shut-off in gram
30314821
4690
9
10
30314826
12800
10
11
30314827
11100
10
11
30314831
7070
10
11
30314838
1960
4
5
30304361
11500
3
4
30314832
4270
12
13
30314833
7540
9
10
30314829
2950
10
11
30130879
2000
3
4
Lowest temperatures FC5816R (120V / 230 V )
Rotor-number
Temperature at max. speed in °C
30314820
- 2°C
30314824
- 3°C
30314821
3°C
30314826
15°C
30314827
5°C
30314831
0°C
30314838
3°C
30304361
3°C
30314832
-12°C
30314833
0°C
30314829
4°C
30314835
8°C
30314828
2°C

GETTING STARTED
Page 11 of 53
SERVICEMANUAL
© OHAUS Corporation
Room temperature: 23°C
The absolute end temperatures can be subject to fluctuations of ±2°C due to power tolerances
of the refrigeration unit.
The lowest sample temperatures are depending on the ambient temperature. If the ambient
temperature is increasing, the lowest sample temperature to be reached is increasing as well.
The acceleration times and deceleration times can be subject of small fluctuations, it depends
from unit to unit, and are therefore approximate values only.
1.7.4 Specifications
Model
FC5816
Speed Range
200 rpm -15000 rpm;10 rpm/set
Maximum RCF
21379 x g;10 x g/set
Maximum Capacity(Rotor)
6 x 250ml
Temperature range(N/A)
Air cool
Running Time
10 sec to 99 hr 59 min 59 sec or continuous
Noise level (depending on the rotor)
≤
61 ± 2 dB(A)
Allowable density at maximum speed
1.2 g/ml
Allowable kinetic energy
34363 Nm
Mains power connection AC
230 V ~ 50/60 Hz
120 V ~ 50/60 Hz
Voltage fluctuation
± 10 %
± 10 %
Current consumption
2.4 A
4.2 A
Power consumption
530 W
520 W
Dimensions (W × D × H)
446 x 538 x 354 mm
17.6 x 21.2 x 13.9 in
Net Weight (without rotor)
52 kg
115 lb
Shipping Dimensions (W × D × H)
840 x 640 x 590 mm
33.1 x 25.2 x 23.2 in
Shipping Weight (without rotor)
77 kg
170 lb
Ambient conditions (EN/IEC 61010-1)
Environment
for indoor use only
Altitude
Use up to an altitude of 2000 m
Ambient temperature
2°C up to 35 °C
Max. relative humidity Max. relative humidity 80 % for temperatures up to 31°C,
decreasing linearly to 50 % relative humidity up to 35°C.
Overvoltage category (IEC 60364-4-443)
II
Degree of contamination
2
Class of protection
I
Not suitable for use in hazardous environments.
EMC
EN/IEC 61326-1 Class B emissions, Basic immunity
FCC Class B emissions

GETTING STARTED
Model
FC5816R
Speed Range
200 rpm -16000 rpm;10 rpm/set
Maximum RCF
24325 x g;10 x g/set
Maximum Capacity(Rotor)
6 x 250ml
Temperature range(Digital)
-20~40℃
Running Time
10 sec to 99 hr 59 min 59 sec or continuous
Noise level (depending on the
rotor)
≤63 ± 2 dB(A)
Allowable density at maximum
speed
1.2 g/ml
Allowable kinetic energy
34363 Nm
Mains power connection AC
230 V ~ 50/60 Hz
120 V ~ 50/60 Hz
Voltage fluctuation
± 10 %
± 10 %
Current consumption
3.7 A
7.8 A
Power consumption
785 W
850 W
Dimensions (W × D × H)
723 x 538 x 354 mm
28.5 x 21.2 x 13.9 in
Net Weight (without rotor)
77 kg
170 lb
Shipping Dimensions (W × D ×
H)
840 x 640 x 590 mm
33.1 x 25.2 x 23.2 in
Shipping Weight (without rotor)
87 kg
192 lb
Ambient conditions (EN/IEC 61010-1)
Environment
for indoor use only
Altitude
Use up to an altitude of 2000 m
Ambient temperature
2°C up to 35 °C
Max. relative humidity Max. relative humidity 80 % for temperatures up to 31°C,
decreasing linearly to 50 % relative humidity up to 35°C.
Overvoltage category (IEC
60364-4-443)
II
Degree of contamination
2
Class of protection
I
Not suitable for use in hazardous environments.
EMC
EN/IEC 61326-1 Class B emissions, Basic immunity
FCC Class B emissions

GETTING STARTED
Page 13 of 53
SERVICEMANUAL
© OHAUS Corporation
1.8 SERVICE INSTRUCTIONS
1.8.1 General technical description
Model FC5816 is a microprocessor controlled laboratory centrifuge.
Model FC5816R is a cooled microprocessor controlled laboratory centrifuge.
The actuation is a three phase asynchronous motor which is controlled by a
frequency converter.
Both models have an independent error detection program, displaying possible errors
and therefore supporting the trouble shooting process.
This 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
Please follow below mentioned safety instructions for any kind of service
actions:
• 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.
• The VDE regulations are valid for all electrical work that has to be done.
1.8.2 Electrical and electronical 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.
1.8.2.2 Control board (PCB)
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, not only the printed
circuit board.
All signal lines lead to the control board.
The PCB controls the entire centrifuge.
1.8.2.3 Control panel

GETTING STARTED
The control panel consists of one LCD-display, one incremental shaft encoder, the upper
front housing and the foil keyboard. These parts can be exchanged separate. The
incremental shaft encoder regulates all parameters which are adjustable by pressing a key
and which are indicated in the LCD-display. In the speed display of the control panel the
error message is indicated if there should occur any trouble
1.8.2.4 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 flashes when the frequency converter is
working correctly.
A defect of the converter will be indicated in the speed display as an error no.
1.8.2.5 Rotor recognition and over speed protection
The centrifuge will recognize the inputted rotor through the rotor identification
transponder and the aerial belonging to it right after the insert automatically. As soon
as the lid gets closed the rotor number will be indicated in the speed display.
If the pre-selected rpm is higher as the permitted rpm of the rotor, the speed
indication in the display will be regulated to the max.speed permitted for this rotor.
The regulation will accelerate the rotor only to the permitted rpm of the rotor.
1.8.2.6 Speed signal
Upper Front Housing
LCD-Display
Potentiometer
Aerial
Transponder
Keyboard Foil

GETTING STARTED
Page 15 of 53
SERVICEMANUAL
© OHAUS Corporation
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 “preset-
signal” is given by the control board to the converter.
1.8.2.7 Lid contact
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.
1.8.2.8 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 stopps when the
oscillating motions are too strong. Therefore you have to follow the adjustment
instructions stated by the manufacturer.

SERVICE MENU
2 SERVICE MENU
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 Activation of the operation menu
The menu can be started as follows:
• Open lid of the centrifuge and switch off main switch.
• Press the keys Time and Door Open hold them and at the same time switch on the
unit.
• After the indication displays flash on, let go of the Time and Door Open
In the display „rpm/rcf“ the stored type of the centrifuge (i.e. 5816R) and below a
letter (i.e. c) is indicated for about 2 seconds. The letter stands for the different
versions of the units which are currently stored in the control board:
for c= cool
for h= heat
for no = nothing
Now it follows a display test for about 5 seconds as shown here under.
Now you have entered the Service mode. By pressing the key accel/decel you go to the
submenus.
Now in the display „accel/decel“ the word „service“ will flash. Only as long as this
word is flashing, you can scroll through the further submenus with the potentiometer.
You have to repeat this step constantly to enter the different submenus.
2.1.1 Submenu Motor starts:

SERVICE MENU
Page 17 of 53
SERVICEMANUAL
© OHAUS Corporation
Here you can read off the number of motor starts.
• Activate the operation menu as described under „Activation of the operation
menu (Part 1)“.
• Turn the potentiometer until the special digit „A“ appears in the service
display.
Now the number of motor starts is indicated.
2.1.2 Submenu Duty cycle
Here you can read off the duty cycle of the unit.
• Activate the operation menu as described under „Activation of the operation
menu (Part 1)“.
• Turn the potentiometer, until the special digit „H“ appears in the service
display.
Now the duty cycle of the unit is indicated.
2.1.3 Submenu Running time of the motor
Here you can read off the operating hours of the motor.
• Activate the operation menu as described under „Activation of the operation
menu (Part 1)“.
•Turn the potentiometer, until the special digit „h“ appears in the service
display.
Now the running time of the motor is indicated.
2.1.4 Submenu Software status

SERVICE MENU
Here you can read of the software status.
• Activate the operation menu as described under „Activation of the operation
menu (Part 1)“.
• Turn the potentiometer, until the special digit „S“ appears in the service
display.
Now the software status is indicated.
2.1.5 Submenu Software status of the frequency converter
Here you can read of the software status of the frequency converter.
• Activate the operation menu as described under „Activation of the operation
menu (Part 1)“.
• Turn the potentiometer, until the special digit „r“ appears in the service
display.
Now the software status of the frequency converter is indicated.
2.1.6 Submenu Error memory
Here the 99 last occurred error messages can be indicated.
• Activate the operation menu as described under „Activation of the operation
menu (Part 1)“.
• Turn the potentiometer, until the special digit „E“ appears in the service
display.
• By pressing the key rpm/rcf the display „rpm/rcf“ is activated and now you
can scroll through the error list either with the potentiometer.

SERVICE MENU
Page 19 of 53
SERVICEMANUAL
© OHAUS Corporation
• Now the 99 last occurred error messages are indicated either by turning the
potentiometer, whereas the first two numbers do describe the place number
and the last two numbers do describe the occurred error.
• According to the software status, individual error messages may not be
indicated resp. may have slight deviations.
• ATTENTION: In case that the signal generator is switch off, the keypad tone
and the audible error message will also be suppressed.
The audible error message is automatically activated if the signal generator
has been switch on
The following table gives information on the individual error messages:
Error
No.
Error Description
Imbalance and rotor error
01
Imbalance occurred
02
permanent imbalance; Imbalance sensor is defective
04
Imbalance switch has been activated for longer than 5 seconds
from software status 1.28
08
Transponder in the rotor is defective or wrong resp. missing data
in the rotor database
from software status 1.28
General error
11
Temperature sensor is defective
12
Chamber overtemperature
14
up to software status 1.32:
Leap of speed is too big between two measurements.
from software status 1.33:
Speed problems; opening of the lid is blocked for a specific time.
Lid error
33
Lid is open while the motor is spinning
34
Lid contact is defective
38
Lid motor is blocked:
all software statuses
from software status 1.26:
the lid lock is blocked for 30 seconds, to avoid overheating of it
Converter error
40
Communication with converter disturbed during start
41
Communication with converter disturbed during stopp
42
Short circuit in the converter
43
Undervoltage converter
44
Overvoltage converter
45
Over temperature converter
46
Over temperature motor
47
Over current converter
48
Timeout between control unit and converter
49
other error of the converter
Speed error
55
Overspeed
Setup error
99
Rotor is not allowed in this centrifuge
2.1.7 Submenu Setup of the temperature (for refrigerated units only)

SERVICE MENU
Here you can change the temperature unit from degree Celsius (°C) to degree
Fahrenheit (°F).
• Activate the operation menu as described under „Activation of the operation
menu (Part 1)“.
• Turn the potentiometer, until the special digit „c“ appears in the service
display.
• By pressing the key rpm/rcf the display „rpm/rcf“ is now activated and you
can setup the respective temperature unit with the potentiometer.
• Now the temperature is indicated in °C resp. in °F during the normal
operation.
Attention: After all points have been reviewed and/or set up, you have to
press shortly the key start to store all parameters. Otherwise the setups were
all for nothing.
If the storage has been successful in the display „rpm/rcf“ the value of the
imbalance sensor and the word „StorE“ are indicated.
2.1.8 Submenu Setup of the signal generator
Here you can switch on resp. switch off the signal generator (audible sound).
• Activate the operation menu as described under „Activation of the operation
menu (Part 1)”.
• Turn the potentiometer, until the special digit „L“ appears in the service
display.
• By pressing the key rpm/rcf the display „rpm/rcf“ is now activated and you
can setup the respective option with the potentiometer.
• Now the audible sound is activated resp. not activated by the end of the run
or when an error message will occur.