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EBA 21
Hettich EBA 21 Repair Instructions
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12.2.2
Mains supply with supply board (A1) 230 V
Q1
Gerätestecker-Kombi
element
appliance plug
combination el
ement
zur Übertempera
tur-
sicherung F3
to overtemperature
fuse F3
zum Frequenzum-
richter A2 / S102 / N
to frequency converter
A
2 / S102 / N
Deckelver-
riegelung
lid lock
Y1
+Ub
X2
zum S
teuerteil
A4 / X1
to control panel A4 / X1
BU
6
5
4
3
2
1
X5
1
234
1
234
zum Freque
nzumrichte
r
to frequenc
y converter
A2 / S501
12
3
4
PK
PK
Unwuchtschalter
imbalance switch
S1
B3
Drehzahlsen
sor
speed sensor
12
3
4
+Ub
10...15V
V
ersorgungsplatine
supply board
A1
+5V
X4
+Ub
X3
+Ub
Optokoppler
optocoupl
er
V
erschlußrel
ais
lid-locking rela
is
BK
BU
10...15V
U
X9
Z1
4
3
2
1
GND
6 Impulse pro Umdrehun
g (siehe
T
achocode)
6 pulses per revo
lution (see t
acho code)
T
achosigna
l / tacho signal
Pin 4 GND (Pin
2)
+8V ... +15V
+5V
GND
OK
Unwucht
imbalanc
e
Unwucht / Imbal
ance
X3 Pin 4 GND (Pin 1)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
12
3
4
56
7
89
1
0
N
PE
L
Netz / mains
230 V
GN/YE
F1
F2
Funkentstörfilter
radio interfer
ence
suppression filter
BK
BK
BK
BK
BK
BK
BU
BU
BK
BK
WH
BK
BU
6
5
GN/YE
GN/YE
GN/YE
L2
Ferritring L2
ferrite ring
L2
32
34
Table of Contents
Default Chapter
3
Table of Contents
3
1 Introduction
5
2 Symbol Meanings
5
3 Description of the Centrifuge
6
Control Panel (A4)
6
Supply Board (A1)
6
Frequency Converter (A2)
7
Special Features
8
Brake Resistor (R1)
8
Motor / Tacho System
8
Lid Lock
8
Imbalance Switch
9
Safety Devices
9
4 Troubleshooting Procedures
9
5 Error Messages
10
Mains Reset
10
Brief Description
10
Description and Elimination of Errors
12
6 Settings and Interrogations
21
Initialization
21
Prerequisites for the Initialization
21
Initializing the Centrifuge
22
Imbalance Mode
23
Parameter Interrogation
23
Acoustic Signal
23
Working Hours
24
Checking the Motor Slippage
24
Setting the Display Contrast
25
Imbalance Switch-Off
25
7 Change Mains Input Fuse
26
8 Functional Check after a Repair
26
9 General Arrangement of the Components
27
10 Mounting and Removing Components
29
Removing the Centrifuge Chamber
29
11 Short the Mains Choke Coil (L1)
30
12 Technical Documents
31
Tachometer Code Configuration of the Rotors
31
Circuit Diagrams
32
Abbreviations of the Cable Colours
32
Mains Supply with Supply Board (A1) 230 V
33
Mains Supply with Supply Board (A1) 115 V
34
Circuit Diagram Supply Board (A1)
35
Connecting- and Component Diagram Supply Board (A1)
36
Signals in the Flat Ribbon Cable between Control Panel (A4) and Supply Board (A1)
37
Block Diagram Control Panel (A4)
38
Connecting Diagram Control Panel (A4)
39
Block Diagram Frequency Converter (A2) and Signals in Flat Ribbon Cable between Frequency Converter (A2) and Supply Board (A1)
40
Connecting Diagram Frequency Converter (A2)
41
Technical Specifications
42
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Operating Instructions
58 pages
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Hettich EBA 21 Specifications
General
Brand
Hettich
Model
EBA 21
Category
Laboratory Equipment
Language
English
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