Hettich EBA 21 Repair Instructions

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Contents
1 Introduction ..............................................................................................................5
2 Symbol meanings.....................................................................................................5
3 Description of the centrifuge.....................................................................................6
3.1 Control panel (A4).............................................................................................6
3.2 Supply board (A1) .............................................................................................6
3.3 Frequency converter (A2) .................................................................................7
3.4 Special features ................................................................................................8
3.5 Brake resistor (R1)............................................................................................8
3.6 Motor / tacho system.........................................................................................8
3.7 Lid lock..............................................................................................................8
3.8 Imbalance switch...............................................................................................9
3.9 Safety devices...................................................................................................9
4 Troubleshooting procedures.....................................................................................9
5 Error messages......................................................................................................10
5.1 MAINS RESET................................................................................................10
5.2 Brief description ..............................................................................................10
5.3 Description and elimination of errors...............................................................12
6 Settings and interrogations.....................................................................................21
6.1 Initialization .....................................................................................................21
6.1.1 Prerequisites for the initialization .............................................................21
6.1.2 Initializing the centrifuge ..........................................................................22
6.2 Imbalance Mode..............................................................................................23
6.3 Parameter interrogation .................................................................................. 23
6.4 Acoustic Signal................................................................................................23
6.5 Working hours.................................................................................................24
6.6 Checking the motor slippage...........................................................................24
6.7 Setting the display contrast .............................................................................25
6.8 Imbalance switch-off .......................................................................................25
7 Change mains input fuse........................................................................................26
8 Functional check after a repair ...............................................................................26
9 General arrangement of the components...............................................................27

Hettich EBA 21 Specifications

General

Brand	Hettich
Model	EBA 21
Category	Laboratory Equipment
Language	English