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MINAC Systems

Revision A

USER MANUAL

31 January 2005

63860.doc
                                                                                                                                                                 

                                                                                                                                                                       

© For reproduction rights, see cover page.

Page  39

 

Alarm

 

Probable Cause

 

Corrective Action

Main contactor off

On twin units this alarm
will stop both outputs

The main contactor is
not energized because

Emergency stop is
activated

Refer to the emergency stop alarm

— 

No lights on
control panel

Indicates lack of
electronics’ power
supply.

Electronics’ power supply
failure.

Refer to Power supply alarm

Summary of Contents for MINAC 25 Twin

Page 1: ...2 2 1 Manufacturer EFD Induction a s P O Box 363 N 3701 Skien Norway Tel 47 35506000 Fax 47 35506010 No part of this publication may be reproduced in any form without the express written permission of...

Page 2: ...oter Messages 10 5 2 Menus 12 5 2 1 Activate Menu menu 2 12 5 2 2 PIN Code Menu menu 26 13 5 2 3 Change PIN code Menu menu 27 14 5 2 4 Setpoint Menu menu 3 14 5 2 5 Timer Menu menu 7 15 5 2 6 Sequence...

Page 3: ...6 2 4 Alarms during start up 28 6 3 Normal Operation 28 6 3 1 Operational Information 29 6 3 2 Control Functions 29 6 3 3 Output Power 31 6 3 4 Distance to Workpiece 31 6 4 Normal Stop 32 6 5 Emergenc...

Page 4: ...s and some simple corrective measures The operation instructions must be read thoroughly before the equipment is used Using these instructions MINAC operators should be able to undertake correct and s...

Page 5: ...in this handbook is a violation of the safety standards of the design manufacture and intended use of the equipment All personnel operating maintaining or working in close proximity to the equipment M...

Page 6: ...se fire or burns The principle of induction heating is based on an alternating current flowing through a coil and thereby generating a magnetic field that varies in magnitude with the current If an el...

Page 7: ...s with the square of the distance from the coil To avoid hazards to personal health Anyone with an implant regardless of type should consult a physician about the effects of high frequency electromagn...

Page 8: ...of combustible materials involves a risk of fire The MINAC systems provide the following output power limitations for continuous use and intermittent duty Equipment Continuous use Intermittent duty M...

Page 9: ...125S and 14 Nm for HHT 240S and HHT 400 5 Once the flow of cooling water has been opened hold the HHT so that the coil points upwards This prevents air bubbles from being trapped inside the transforme...

Page 10: ...nt menus by using the function keys on the keyboard If the unit is a Twin model it has one extra passive menu accessible to give information for both outputs at the same time Additionally there are tw...

Page 11: ...erent functions F9 For returning to the previous menu For typing numbers For entering typed numbers To adjust the output reference and for use where a function comprises more than one line Clears type...

Page 12: ...Indicates that some fault condition is present This will block the power on function until the alarm system is reset Show if the unit is to be controlled from the operating panel or via the external c...

Page 13: ...age across the rectifier is too low the DC voltage is measured directly Check the supply voltage The voltage across the rectifier is too high the DC voltage is measured directly Check the supply volta...

Page 14: ...y level preventing further increases in output power Maximum AC Current Limit The output current has reached a preset maximum level preventing further increases in output power Maximum DC Power Limit...

Page 15: ...splay Timer Sequence menu 23 F6 Display Twin Values menu 36 visible only in Twin units F7 Status info menu 29 When the frequency converter is turned on the system automatically enters menu 24 Display...

Page 16: ...to change converter settings when the PIN code function is set at ACTIVE This prevents unauthorized personnel from reprogramming functions settings in the menus Once the PIN code is entered the operat...

Page 17: ...e setpoint source and signal type to from the external control F0 AC Current ACTIVE OFF F1 DC Power ACTIVE OFF F2 Temperature ACTIVE OFF F3 Setpoint source LOC EXT HHT DEFAULT F6 Ext signal select DC...

Page 18: ...ime 0 999 Target setpoint 0 100 or 0 250 C 2 100 corresponds to kW A C F4 Energy menu menu 08 To select a program number segment number segment type and time unit press the relevant function key until...

Page 19: ...uary 2005 63860 doc For reproduction rights see cover page Page 16 Table for Registering Program Settings Mode of Operation AC current DC power Temperature Program No Segment no Segment type Segment d...

Page 20: ...e Table 1 shows the sequence parameters The example on the next page shows how to program this sequence Figure 7 Sequence A Table 4 Sequence A Program No 2 Segment no Segment type Segment duration Tar...

Page 21: ...until 1 m is displayed 6 ENTER NUMBER OF TIME UNITS Enter the number 4 4 and 7 SET TARGET SETPOINT Move the cursor down a line by pressing the down arrow key and enter the number 80 80 and 8 SELECT S...

Page 22: ...if RAMP is not already set as the segment type 20 SELECT TIME UNIT Press F3 until 1 m is displayed 21 ENTER NUMBER OF TIME UNITS Enter the number 3 3 and 22 SET TARGET SETPOINT Move the cursor down a...

Page 23: ...ergy Supervision The purpose of the energy supervision function is to detect changes in the heating process when running the sequence function3 A change in the heating process is often caused by chang...

Page 24: ...put ACTIVE OFF Temperature reached can only be used in equipment fitted with temperature sensing equipment and when running a sequence in temperature mode of operation When Temperature reached is acti...

Page 25: ...n time is given as a relative value Only one of these functions is shown since they are mutually exclusive This menu also shows the bar graph representing the value selected as the mode of operation A...

Page 26: ...induction heating unit in its working position 2 Fit a suitable induction coil to the hand held transformer refer to paragraph 4 CAUTION CORRECT VOLTAGE Make sure that the supply voltage matches the s...

Page 27: ...n etc and that the inlet water temperature is below 35 C 95 F 6 See figure 8 If the external control unit ECU is in use connect it to the signal plug socket s X9 and or X9 1 at the rear of the convert...

Page 28: ...ating panel READY or FAILURE lamp LOCAL lamp HHT 1 lamp The display on the Man Machine Interface MMI briefly shows a presentation screen followed by the Display Values Menu This menu provides a graphi...

Page 29: ...current DC power and Temperature mutually exclusive functions The selected mode of operation regulates the output power determined by a given setpoint For further information about modes of operation...

Page 30: ...ssed Set the output power level in the sequence program refer to paragraph 5 2 6 To interrupt the function press the POWER OFF button 3 Control from the HHT Control of the output power with the button...

Page 31: ...ually if using a foot controller 0 100 control range Setpoint source EXT or DEFAULT for foot controller LOC for foot switch 6 2 4 Alarms during start up If any alarm is activated during the start up s...

Page 32: ...n is activated the sequence program no selected in the Sequence Menu will start each time a POWER ON signal is given Note that in remote control the sequence program to be started is selected via the...

Page 33: ...n is activated the output is reduced limited according to the water s cooling capacity if necessary to protect the unit The alarm level for low water flow is reduced and the alarm level for over tempe...

Page 34: ...ction of the heating temperature This mode of operation is generally chosen when the equipment is used in a production line Temperature Temperature mode can be used in special applications where a tem...

Page 35: ...hours NOTE If the equipment is to be kept or transported in areas where there is a risk of low temperatures and damage from freezing drain the cooling system Set the MAIN switch to the ON position an...

Page 36: ...e emergency stop from the ECU and press the RESET button on the operating panel The unit will be ready to receive a new power on command To restart after a local Emergency switching off follow the nor...

Page 37: ...t the on site maintenance personnel EFD Service Department or the nearest EFD representative Whenever possible the operator should manually record the relevant operational data as this information may...

Page 38: ...air a failure on the internal electronic circuits AC over current alarm AC over current can be caused by a short circuit in high power modules CAP CON or HHT including cables Most common is a short ci...

Page 39: ...ent or a short in the output circuit An error in the internal frequency control system Short circuit in the induction coil or terminals 1 Make sure that there are no short circuits in the induction co...

Page 40: ...flow Redesign the coil if necessary 5 If the EOR function is active see paragraph 5 3 2 External Fault Customer defined alarm e g external interlock alarm external water flow alarm etc Emergency Stop...

Page 41: ...repaired by qualified personnel Fuse Fan Indicates current limiter for the internal cooling fans is active On twin units this alarm will stop both outputs Broken fan motor Any failure on the internal...

Page 42: ...ause Corrective Action Main contactor off On twin units this alarm will stop both outputs The main contactor is not energized because Emergency stop is activated Refer to the emergency stop alarm No l...

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