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USER MANUAL

1. LOC Setpoint from the up and down arrow buttons on the control panel EXT Setpoint from an ECU or other external device HHT Setpoint from the setpoint control on the HHT handle if available DEFAULT Setpoint from the source where power on command was detected EEN E AA PA A e a a e EE PA o a Y a MINAC Systems Revision A LEAL 63860 doc USER MANUAL 31 January 2005 POWER ON LOCAL Se REMOTE selector POWER OFF Figure 12 Switches and Indicators panel POWER ON OFF buttons 2 Local Control from Operating Panel The LOCAL REMOTE selector must be set to LOCAL when the MINAC is operated from the operating panel only Turn the output power on and off with the POWER ON POWER OFF buttons Unless the sequence function is activated set the output level from the control panel with the up and down arrows Setpoint source LOC EXT HHT or DEFAULT When the timer function is active the output power will be on until either a preset time has elapsed or the POWER OFF button is pressed lf the sequence function is activated the function will start each time the POWER ON button is pressed Set the output power level in the sequence program refer to paragraph 5 2 6 To interrupt the function press the POWER OFF button Control from the HHT Control of the output power with the button on the HHT handle is independent of the LOCAL REMOTE switch position Turn the output power on by continually p
2. 1 6 seconds until the output power comes on The reason for this time delay is to make sure that the water is flowing before any heat develops NOTE When the cooling water temperature is low at the same time as the ambient temperature is high activate the Water auto shut off function in the Activate Menu to avoid condensation on pipes etc inside the unit A as oe a lI A ia EEN H D vest a ee Ve s et E mn AA MINAC Systems Revision A LEAN USER MANUAL 31 January 2005 63860 doc EFD Energy Supervision The energy supervision function enables the operator to detect changes in the heating process when running the sequence function Once a perfect sequence program has been established store the total energy value of the run and enter an allowed percentage energy deviation value The energy consumption of the following runs of the same program no will be compared with the stored value If the current value is within the allowed deviation OK or a is shown in the Display Sequence Timer Menu If it is not within the allowed deviation LOW HIGH or a 65 is shown For further information refer to paragraph 5 2 7 The energy supervision function is activated deactivated in the Activate Menu PIN Code The PIN code function provides a security option for system programming The function is described in paragraph 5 2 2 Extended Operating Range The extended operating range EOR function enables the unit to operate
3. O rings for the cooling water seals are free of any dirt or damage 3 When fitting the coil to the HHT terminals maintain a parallel gap between the coil and the HHT to avoid a short circuit 4 Use only brass termination nuts on the HHT Nuts of any other material are not allowed Torque the nuts to 9 Nm for 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 transformer causing local overheating of areas which are not in contact with the cooling water 6 Prevent short circuits in the coil during operation by avoiding contact between the coil and the workpiece If contact is difficult to avoid coat the coil with an aluminum oxide avoid oxide on the contact surface This will reduce the risk of short circuits Coils supplied by EFD Induction a s are already coated with an aluminum oxide CAUTION The HHT is a vulnerable part of the equipment and therefore must be handled with care CAUTION TEST RUN When changing the induction coil or heating new materials run tests to check the equipment settings Figure 3 Separate HHT and Coil Figure 4 Coil connected to HHT A as oe a lI A ia EEN H D yee ee e EE mn 5 1 MINAC Systems Revision A LEAN USER MANUAL 31 January 2005 63860 doc EFD MAN MACHINE INTERFACE Display and Keyboard The display and keyboard together form t
4. because On twin units this alarm Emergency stop is will stop both outputs activated No lights on Electronics power supply Refer to Power supply alarm control panel failure Indicates lack of electronics power supply A as oe a lI A ia EEN H D yee ee e EE mn mam
5. ia EEN H D vest a ee Ve s et E mn mam 6 3 3 6 3 4 MINAC Systems Revision A LEAN USER MANUAL 31 January 2005 63860 doc EFD Output Power There are the following maximum output powers available for continuous use and intermittent duty The maximum output powers are attainable only with low Q magnetic steel The output power can be regulated by using the following three different parameters modes of operation AC current Using the current to regulate the output power is recommended for heating processes with varying impedance as a constant current produces constant induction Typical application hardening DC power DC power regulation is recommended for heating processes where the load is constant constant impedance or in general where heat absorption varies as a function 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 temperature sensor is installed at the workpiece This also requires optional temperature input connector In local operation the setpoint can be either entered as a percent value in a sequence program or adjusted by using the up and down arrows NOTE As long as a POWER ON signal is given the output power will never be zero although the reference setpoint may be set to zero There will be a small current in the coil because the frequency c
6. is connected to ground Signal socket X9 Nameplate Signal socket X10 for Twin Signal socket 9 1 Signal socket X10 1 for Twin Water in Water out A as oe a lI A ia EEN H D yee ee e EE mn a MINAC Systems Revision A LEAN USER MANUAL 31 January 2005 E B 63860 doc According to IEC 60204 1 paragraph 5 3 2 the plug on the main supply cable is known as the supply disconnecting device To comply with this regulation the unit must be connected to the main power supply by means of this plug socket combination Before connecting the main power cable make sure that the supply voltage matches the specifications on the nameplate on the back of the cabinet See figure 8 Fit the cooling water supply to the inlet and outlet water tailpieces Make sure that the water supply is connected to the inlet and the water return to the outlet Check that the cooling water circuit is ready for use pumps turned on external valves open etc and that the inlet water temperature is below 35 C 95 F 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 converter For Twin versions the signal plug sockets for HHT 2 are X10 and or X10 1 When using an ECU make sure that the LOCAL REMOTE selector is in the correct position i e at REMOTE Otherwise it should be positioned at LOCAL Power increase button Power output a
7. key S seconds m minutes and h hours Return to the Main Menu by pressing F9 The Sequence Menu also contains two sub menus Press F4 to call up the Energy menu and F5 to call up the Event output menu Segment Type The two segment types are STEP and RAMP While a step runs at a steady level determined by the target setpoint a ramp increases decreases to the level determined by the target setpoint from the setpoint level given in the previous segment If a ramp is the first segment in a sequence it always starts at zero 2 If Temperature mode of operation is selected this entry is in degrees Celsius or else in percent A WY a a ID A ia ee a E e a ee a E Wm if MINAC Systems Revision A LEAN USER MANUAL 31 January 2005 63860 doc E FP D Table for Registering Program Settings Mode of Operation AC current DC power Temperature Program No Segment type Segment duration Target setpoint A MA a a ar lI A ia EEN E e a a e EE Wm gt A MINAC Systems Revision A LEAN USER MANUAL 31 January 2005 63860 doc EFD Example of a Sequence Figure 7 illustrates a heating sequence while Table 1 shows the sequence parameters The example on the next page shows how to program this sequence Setpoint 9 A 100 Segment no 0 80 Segment no 1 60 40 Segment no 2 Segment no 3 20 gt Time mins 0 4 9 13 16 Figure 7 Sequence A Table 4 Sequence A Pro
8. until the alarm system is reset Local Remote indicator Show if the unit is to be controlled from the operating panel or via the external control plugs Power off switch Switches the output power off Power on switch Switches the output power on This button has an indicating light that is lit when the output power is on Reset switch Resets the alarm system when a fault condition is no longer present Loc rem switch Toggles the operation mode of the unit HHT1 indicator Indicates that the operating panel keys are valid for HHT1 output HHT2 indicator Indicates that the operating panel keys are valid for HHT2 Twin units only output Control Select switch Allows the operator to switch between HHT1 and HHT2 The Twin units only HHT selected is the one operated by the operating panel and the one displayed on the MMI display AN EE Mi ee EEN E y ii e ee e EE Wm A ATT ARS _ SRR Revision A 31 January 2005 D MINAC Systems USER MANUAL 63860 doc Footer Messages Each screen shown on the display contains a footer field where the following information is displayed with priority as indicated 1 Alarm messages 2 Indications limitations when the power is on 3 Messages during normal operation Remove the alarm messages by eliminating the cause of the alarm and pressing the RESET button on the operating panel Table 3 Alarm Messages and Causes Emergency Stop DC Voltage Too
9. 60 doc E D Alarm ProbableCause Been duo Water flow low Insufficient water flow Check that external manual valves indicaieeinsunicieni through the converter and solenoid valves are open water flow through the Module heat sink Make sure that cooling water supply cooling circuit Clogged water filter in to the frequency converter is water inlet terminal adequate e 4 bar 58 psi differ Insufficient water flow ential pressure minimum 3 4 inlet through the HHT hose minimum and minimum water flow See nameplate Clean the inlet water filter There is access to this filter on the outside Unscrew the hose tail for the water inlet retract the filter and clean with compressed air Make sure that the heating coil allows for enough water flow Redesign the coil if necessary If the EOR function is active see paragraph 5 3 2 Insufficient water flow through the induction coil External Fault Customer defined alarm e g external interlock alarm external water flow alarm etc Emergency Stop The emergency stop Before restarting the unit after an command command has been emergency stop command find the Indicates that the activated externally on an reason for the activation of the emergency stop has external control unit emergency stop function been activated To reset the emergency stop command function reestablish the emergency stop command signal on the ext plug Press the RE
10. EN H D yee ee e EE mn A A AO TREN AURA EFD Revision A 31 January 2005 MINAC Systems USER MANUAL 63860 doc Operational Failures Alam ProbableCause Corrective Action Switch mode power supply alarm Indicates a problem on the SMPS card On twin units this alarm will stop both outputs Power Supply Alarm Indicates a problem on the power supply unit On twin units this alarm will stop both outputs AC over current alarm A missing phase Main fuse break Broken fuse s in the internal switch mode power supply Faulty switch mode power supply Error in external connected equipment if any Error on the internal power supply or other internal electronic circuits AC over current can be caused by a short circuit 1F3 Make sure that the supply voltage consists of all three phases Check the main fuses 1F 1 1F2 Only qualified personnel shall repair a failure on the internal electronic circuits Remove externally connected equipment and reset the alarm Only qualified personnel shall repair a failure on the internal electronic circuits system performance Check that the coil is within the in high power modules CAP CON or HHT including cables Most common is a short circuit in the induction coil or its terminals It may also be an error on the internal power supply or other internal electronic circuits Inspect the above me
11. Low DC Voltage Too High Power Supply Alarm Power On By Start up Alarm External fault Over current driver alarm Capacitive alarm AC over current alarm DC over voltage detected Inductive alarm Ground fault detected Water flow low Over temp inlet water Over temp inverter DC over current alarm Low frequency alarm High frequency alarm Switch mode supply alarm Fuse fan alarm System reset by WatchDog Timeout Main contactor off Emergency Stop has been activated on externally connected equipment The voltage 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 voltage Fault in the power supply to the electronics A Power on device has been activated when the converter was turned on Check the button on the HHT handle User defined evenit failure has taken place Transistor current too high or driver circuit failure AC current is too capacitive or a short circuit has occurred in the output circuit Over current in the output circuit was detected DC over voltage peak was detected AC current is too inductive Circuitry shorted to ground Water flow in the cooling circuit too low Cooling water inlet temperature too high Inverter heat sink temperature too high DC over current was detected Output circuit resonance frequency below limit Output circuit reson
12. MINAC Systems Mobile Induction Heating Equipment USER MANUAL MINAC 25 40 50 80 MINAC 25 Twin Version MCCC 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 EFD Induction a s EFD Induction a s reserves the right to change technical specifications without notice MINAC Systems Revision A USER MANUAL 31 January 2005 63860 doc CONTENTS 1 INTRODUCTION nara 2 SAFETY INSTRUCTIONS PRECAUTIONS AND HAZARDS 2 1 E e NEE 2 2 IC CUIC le Lei E 2 3 Heated Objects cansar 2 4 Electromagnetic Fields ooocccocccconnnconcnconcncnacononcnonanonnns 3 RESTRICTIONS AE LE 4 CONNECTING AND USING THE CO 5 MAN MACHINE INTERFACE 5 1 Display and Keyboard scree crore ore oa pee 5 1 1 Footer Messages Die ll 5 2 1 Activate Menu Menu 2 Dee PIN Code Menu Menu 26 5 2 3 Change PIN code Menu menu 241 5 2 4 SCOOT AV STU e EE EEN 5 2 5 Timer Menu menu Z A 5 2 6 Sequence Menu MENU A 5 2 Energy Menu Menu 8 5 2 8 Event output menu Menu 201 5 2 9 Display Values Menu 24 5 2 10 Display All Values Menu 190 5 2 11 Display Timer Sequence Menu 232 5 2 12 Display Twin Values menu 36 Only Twin units 5 2 13 Status menu F7 Menu 201 So OPERATION cada 6 1 Bere ANC D 6 2 SEN 6 2 1 EI RT el EE 6 2 2 Programming the MM 6 2 3 OM A
13. OFF gt F2 Segment output lt ACTIVE OFF gt 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 activated the following lines appear Temp reached 1 level C lt 0 250 gt Temp reached 2 level C lt 0 250 gt 100 corresponds to C lt 250 gt The two Temp reached levels can be set by the operator to a temperature between O and the temperature sensors maximum value in this case 250 C When the temperature at the sensor is above the set Temp reached level the corresponding Event output 1 or 2 is high otherwise it is low The Event outputs are available only when using a fieldbus as external interface When Segment output is activated the following lines appear F3 Segment no lt 0 9 gt F4 Event output 1 lt LOW HIGH gt F5 Event output 2 lt LOW HIGH gt The Segment output function makes it possible to specify the Event outputs levels Low or High for each segment in a sequence program The Event outputs are available only when using a fieldbus as external interface Typical use of the event outputs is to synchronize an outside operation with a heating event A as oe a lI A ia EEN H D yee ee e EE mn e A 5 2 9 5 2 10 5 2 11 5 2 12 5 2 13 MINAC Systems Revision A LEAN USER MANUAL 31 January 2005 63860 doc EFD Display Values menu 24 This men
14. Only qualified personnel shall repair frequency control system a failure on the internal electronic Indicates too inductive a circuits an AC current Capacitive An error in the internal Make sure that there are no short frequency control system circuits in the induction coil or its terminals Please note that both the coil and the terminals must be kept clean to avoid the risk of short circuits Only qualified personnel shall repair a failure on the internal electronic circuits Indicates too capacitive an AC current or a Short circuit in the short in the output induction coil or terminals circuit Over temperature The inlet temperature of Make sure that the inlet cooling Inlet water the cooling water is too water temperature is below high 35 C 95 F If the temperature has Indicates that the H may be an error on the been too high it might take some pei hee Halo internal power supply or time before the Over temp Water high other internal electronic alarm can be reset Let the water circuits flow through the converter the Auto Water Shut off control On twin units this alarm function must not be activated will stop both outputs If the EOR function is active see paragraph 5 3 2 Any failure on the internal electronic circuits has to be repaired by qualified personnel A MA a a ar lI A ia EEN E e a a e EE Wm ar MINAC Systems Revision A LENS USER MANUAL 31 January 2005 638
15. SET button to make the unit ready for use DC Voltage too low The main voltage is too Check that the main voltage is within The DC voltage on the OW o the limit rectifier is too low One phase is missing Make sure that the supply voltage There was a temporary consists of all three phases drop in the main voltage DC Voltage too high The main voltage is too Check that the main voltage is within On twin units these high the limit alarms will stop both There was a temporary outputs high main voltage Paes ARA A PA ES eo A eent a a as e LE Wm Da my ATT ARS _ SRR MINAC Systems Revision A USER MANUAL 31 January 2005 63860 doc E FP D Alarm Probable Cause Corrective Action Power on by startup There was a Power on Release any stuck power on buttons command detected by the and press the RESET button to make control system during the unit ready for use startup DC Over voltage There was a high voltage detected peak on the DC capacitor On twin units this alarm will stop both outputs Ground fault detected The induction coil was Check the main voltage supply for On twin units this alarm grounded noise peaks from other equipment will stop both outputs The HHT had an internal connected to the same line flash over Make sure that the induction coil is not connected to ground during heating Have the HHT replaced by qualified personnel Any failure on the i
16. ance frequency above limit Problem on the SMPS card Internal cooling fan broken The unit has been restarted automatically by the micro controller due to an internal failure in software or hardware The main contactor is not energized For further descriptions of the various causes and actions refer to Paragraph 6 7 Disturbance of Operation and Corrective Measures Wm dA MINAC Systems Revision A LEAN USER MANUAL 31 January 2005 63860 doc EFD Indications Limitations during Power On The purpose of these limitations is to achieve an optimal combination of maximum output power and sufficient overload protection of the equipment e Low frequency current limit The voltage across the transformer has reached a preset maximum level for the current load and frequency level preventing further increases in output power e High frequency current limit The output current going through the transistors has reached a preset maximum level for the current load and frequency level preventing further increases in output power e Maximum AC Current Limit The output current has reached a preset maximum level preventing further increases in output power e Maximum DC Power Limit The DC power has reached a preset maximum level preventing further increases in output power e Output reduced by EOR The extended operating range EOR function has reduced the output to a secure level for the current cooling water flo
17. button Power output button Power decrease Power output button retention button Figure 9 HHT 2405 power output Figure 10 HHT 400S power output and retention buttons increase and decrease buttons See figure 9 10 Be sure that the power output button on the HHT handle is not stuck in the POWER ON position This also applies to ECU switches and buttons If possible the operator should have a workstation from which he she can observe the workpiece the induction coil and the front of the converter and or the ECU EE SE IL DE yee ee e EE mn A A 6 2 6 2 1 6 2 2 MINAC Systems Revision A LEAL USER MANUAL 31 January 2005 63860 doc E FP D Start Main switch ca fas ma 0 EY Main switch Figure 11 MINAC 25 40 and 50 80 cabinet front main switch 1 See figure 11 At the front bottom of the cabinet turn on the converter s main switch 2 See figure 6 The following lamps and LEDs should light AUX VOLTAGE lamp on the operating 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 graphic presentation of the operational values during the heating process Programming the MMI lf the MMI is already programmed and no editing is needed go to paragraph 6 2 3 Otherwise return to the MMI main menu by pressing F9 and perform the necessary programmin
18. e o e o IIA MINAC Systems Revision A EENEG ee 31 January 2005 E F D 6 2 4 AMS QUANO Sta e EE 28 6 3 NOM ODO raras 28 6 3 1 Operational Information cccccceecccseeeeeseeeeeeeeeeeeeeeeeeeeeeseeeeesaeeeeseeeeeeas 29 6 3 2 Control FUNCTIONS occccoccccoccncccnnnocnnnconnnonnnononononnnnnnnnnnnnononnnnnnnnnnannnnnnnnnns 29 6 3 3 OIDO e E EN 6 3 4 Distance to VWorkpoiece 31 6 4 NoE ES 0 AP etre eRe ee etre eniee A En weR Ree teen eRR ern ee reeee rns 32 6 5 Emergency Stop cccccccccceecccceseeeceeseeeeeeesseeeesseeeesseecessaeeeeseueesseeeseneeesaeees 32 6 6 Restart after Emergency Stop Commande 33 6 7 Disturbance of Operation and Corrective Measures coooncccconcnccnccncononnnonoco 34 MINAC Systems Revision A USER MANUAL 31 January 2005 63860 doc E be D INTRODUCTION This manual provides step by step operation instructions for the MINAC standard 25 40 and 50 80 systems and MINAC 25 Twin systems It also contains safety information and instructions 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 safe operation However only qualified personnel should carry out general trouble shooting and maintenance tasks Display and Output k d power cable SES Switches and HHT indicators Figure 2 MINAC Standard 50 80 Induction Heater with HHT 400S AN dE M
19. e shows operational and alarm messages from the left lf the unit is a Twin model a square in the lower right corner shows which one of the two outputs is displayed on the screen A as oe a lI A ia EEN H D yee ee e EE mn ke MINAC Systems Revision A LEAL USER MANUAL 31 January 2005 63860 doc E F D E El El VTT e EN YA GEET Figure 5 Display and Keyboard Table 1 Keyboard Keys and Functions Ten function keys FO F9 For selecting different functions F9 For returning to the previous menu Number keys 0 9 For typing numbers Enter key For entering typed numbers Arrow keys fT U To adjust the output reference and for use where a function comprises more than one line Clear key Clears typed numbers if the enter key has not yet been pressed B Operating Switches and Indicators Below the display keyboard section of the MMI there is a section of operating switches and indicators These switches and indicators function as the operating devices during normal operation sa at mn A MINAC Systems Revision A LEAL USER MANUAL 31 January 2005 63860 doc E FE D Figure 6 Switches and Indicators Table 2 Switches and Indicators and Functions AUX Voltage indicator Indicates that the voltage for the auxiliary circuits is on Ready indicator Indicates that the MINAC system is ready for use Failure indicator Indicates that some fault condition is present This will block the power on function
20. enu 26 This menu provides a security option for the system through the entry of a Personal Identification Number PIN The PIN Code Menu will automatically be called up when the operator tries to enable disable the PIN code function in menu 2 Activate Menu This ensures that only authorized personnel can enable disable this function The PIN Code Menu is also called up automatically if the operator tries 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 operator can change any settings without re entering the PIN code each time After 5 minutes of inactivity on the keyboard the PIN code protection is reactivated A picture of a lock in the upper right corner of the display indicates that the PIN code protection is active When the PIN code is entered and accepted the program returns to the previous menu Give PIN code lt 0 9999 gt FO Change PIN code new menu 27 The PIN Code Menu also contains a Change PIN code sub menu Press FO to call up this menu Return to the previous menu by pressing F9 Default PIN Code The default PIN code on a new converter is the number 0 and can be changed in the Change PIN Code Menu On twin versions the PIN code is identical for the two outputs The F8 selection is only visible if the unit is equipped with double external interfaces optio
21. f STEP is not already set as the segment type 15 SELECT TIME UNIT Press F3 until 1 m is displayed 16 ENTER NUMBER OF TIME UNITS Enter the number 4 lt 4 gt and lt gt 17 SET TARGET SETPOINT Move the cursor down a line by pressing the down arrow key and enter the number 30 lt l gt lt 30 gt and lt J gt 18 SELECT SEGMENT NO 3 Press F1 and the number 3 is displayed 19 SELECT SEGMENT TYPE Press F2 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 lt 3 gt and lt gt 22 SET TARGET SETPOINT Move the cursor down a line by pressing the down arrow key and enter the number 0 lt l gt lt 0 gt and lt gt 23 PROGRAMMING SEGMENT NO 4 9 This heating sequence Sequence A consists of just four segments This means that the remaining six segments in the program must be set to zero duration Proceed as follows a Select segment no 4 9 b Move the cursor to the Time line by using the down arrow key J c Enter the number 0 lt 0 gt and lt gt The sequence Is now programmed and ready to run provided that the SEQUENCE function in the Activate Menu menu 2 is activated A as oe a lI A ia EEN H D yee ee e EE mn dA 5 2 7 MINAC Systems Revision A LEAN USER MANUAL 31 January 2005 63860 doc EFD Energy Menu menu 8 This menu enables the operator to see how much ene
22. g editing 1 Choose Control Functions Activate Menu there are seven types of control functions Pes es oe a Ms KEE a H D ent ii e ee e EE mn A m MINAC Systems Revision A LEAN USER MANUAL 31 January 2005 E r 63860 doc e Sequence e Timer e Water Auto Shut off e Energy Supervision e PIN Code e Language e Extended Operating Range The sequence and timer functions are mutually exclusive For further information about the control functions refer to paragraphs 5 2 1 and 6 3 2 a Go to the Activate Menu FO in the Main Menu b Activate the desired control functions by pressing the keys in front of the various options Sequence and timer are mutually exclusive functions c Return to the Main Menu press F9 Choose Mode of Operation Setpoint Menu There are three modes of operation AC 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 and the reference setpoint refer to paragraphs 5 2 4 and 6 3 3 Temperature operation requires additional temperature measuring equipment a Go to the Setpoint Menu F1 in the Main Menu b Choose the mode of operation c Return to the Main Menu press F9 6 2 3 Power on T Setpoint Source The setpoint source is determined in the Setpoint Menu menu 3 Function F3 Setpoint source gives the following options
23. gram No 2 Segment type Segment duration Target setpoint rn Im im IL mm EC E E A EE DEE KE EEN H D ent ii e ee e EE mn dy MINAC Systems Revision A LENS USER MANUAL 31 January 2005 63860 doc EFD Programming example 1 SELECT SEQUENCE MENU Press F3 when in the Main Menu 2 SELECT PROGRAM NUMBER Press FO until the number 2 is displayed 3 SELECT SEGMENT NO 0 Press F1 and the number 0 is displayed 4 SELECT SEGMENT TYPE Press F2 if STEP is not already set as the segment type 5 SELECT TIME UNIT Press F3 until 1 m is displayed 6 ENTER NUMBER OF TIME UNITS Enter the number 4 lt 4 gt and lt J gt 7 SET TARGET SETPOINT Move the cursor down a line by pressing the down arrow key and enter the number 80 lt gt lt 80 gt and lt gt 8 SELECT SEGMENT NO 1 Press F1 and the number 1 will be displayed 9 SELECT SEGMENT TYPE Press F2 if RAMP is not already set as the segment type 10 SELECT TIME UNIT Press F3 until 1 m is displayed 11 ENTER NUMBER OF TIME UNITS Enter the number 5 lt 5 gt and lt gt 12 SET TARGET SETPOINT Move the cursor down a line by pressing the down arrow key and enter the number 30 lt l gt lt 30 gt and lt gt 13 SELECT SEGMENT NO 2 Press F1 and the number 2 is displayed A MA a a ar lI A ia EEN E e a a e EE Wm dA MINAC Systems Revision A LENS USER MANUAL 31 January 2005 63860 doc EFD 14 SELECT SEGMENT TYPE Press F2 i
24. h strong magnetic fields if they have not consulted their physician beforehand e n general all personnel should take great care not to come too close to the induction coil when the equipment is in operation Ma 8 ent ii e ee e EE mn A MINAC Systems Revision A LEAN USER MANUAL 31 January 2005 63860 doc EFD RESTRICTIONS IN USE Only use the MINAC solely for its intended purposes under safe conditions and in proper surroundings Take great care when using the equipment Heat only electrical conductive materials The presence of combustible materials involves a risk of fire The MINAC systems provide the following output power limitations for continuous use and intermittent duty MINAC 25 25 Twin 25 kW 40 kW MINAC 50 80 50 kW 80 kW The maximum output powers are attainable only with low Q magnetic steel The maximum duty factor is 0 5 and the maximum cycle time is 10 minutes This means that during a selected cycle the unit can run at maximum output power only half of the time to a maximum of five minutes A MA a a ar lI A ia EEN E e a a e EE AA mm MINAC Systems Revision A LATENT USER MANUAL 31 January 2005 63860 doc E FP D CONNECTING AND USING THE COIL 1 Make a good electrical contact between the coil and the HHT terminals be sure that the contact surfaces on both the coil and the HHT terminals are free of dirt and oxides If necessary clean the surfaces with fine emery paper 2 Be sure that the
25. he frequency converter s Man Machine Interface MMI and are located on the operating panel A number of different menus are available to the operator The starting point for access to these menus is the Main Menu menu 1 which gives an overview of the menus available Six of the menus are active This means that the operator can enter different variables options such as control mode time sequence setpoint water shut off extended operating range etc These settings can be entered only in the power off mode Four passive menus provide operational information The operator can switch between the different 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 two menus for the PIN code Display Sections The top row of the screen is divided into three areas The left area displays the menu identifier number the center area displays the menu name and the right area indicates the returning key When the PIN code is active a padlock symbol is displayed in the upper right corner The center part of the screen shows the contents of the selected menu This display can show a bar graph of relevant internal analog signals timer or sequence data or operator selectable values The menu displays also contain explanatory text for the different displays The bottom line or footer messag
26. nal Paes es ov a ID A ia EEN H D vest a ee Ve s et E mn dA 5 2 3 9 2 4 MINAC Systems Revision A ASS USER MANUAL 31 January 2005 63860 doc EFD Change PIN code Menu menu 27 This menu allows the operator to change the PIN code First enter the old PIN code and then enter the new PIN code twice Give old PIN code lt 0 9999 gt Give new PIN code lt 0 9999 gt Retype new PIN code lt 0 9999 gt Return to the previous menu by pressing F9 Setpoint Menu menu 3 This menu is used to select the mode of operation type of regulation Only one of the first three modes in the list can be activated at a time mutually exclusive functions In addition this menu contains a function for selecting the setpoint source and signal type to from the external control FO AC Current lt ACTIVE OFF gt F1 DC Power lt ACTIVE OFF gt F2 Temperature lt ACTIVE OFF gt F3 Setpoint source lt LOC EXT HHT DEFAULT gt F6 Ext signal select lt DC power AC current DC voltage Frequency Temperature gt F7 Ext setpoint signal type lt 0 10V 0 20mA 4 20mA gt F8 Ext feedback signal type lt 0 10V 0 20mA 4 20mA gt Return to the Main Menu by pressing F9 Setpoint source The four options given in function F3 Setpoint source have the following definitions LOC Setpoint from the control panel up and down arrows EXT Setpoint from an external device HHT Setpoint from the HHT setpoint control DEFAULT Setpoint f
27. nduced in the material Due to the resistance of the material heat is developed in the region of the material through which the eddy currents flow Induction heating equipment can heat electrically conductive materials to a very high temperature in a short time To prevent the danger of fire or burns DO NOT e come in direct contact with heated objects before they have cooled e wear or have metal objects about your body while operating maintaining or being in the presence of the inductance equipment when it is in use e use or keep any combustible materials near the work area or heated objects A as oe a lI A ia EEN H D yee ee e EE mn Las 2 4 MINAC Systems Revision A LEAN USER MANUAL 31 January 2005 63860 doc EFD Electromagnetic Fields WARNING Electromagnetic fields can be a health risk All induction heating equipment produces electromagnetic fields that are concentrated inside the coils The field s strength depends on the current s strength and the number of turns in the coil The field s strength decreases with the square of the distance from the coil To avoid hazards to personal health e Anyone with an implant regardless of type should consult a physician about the effects of high frequency electromagnetic fields on the implants This also applies to pregnant women e Persons with pacemakers heart valves or metal pins plates or other bone joining devices should avoid exposure to induction coils or areas wit
28. nerated while an ECU Is used the alarm message Stop appears on the footer display See 5 1 1 The power output of the MINAC is switched off and all power on functions of the MINAC are blocked To perform local emergency switching off simply turn off the main disconnector on the MINAC s operating panel mn mam 6 6 MINAC Systems Revision A LEAL USER MANUAL 31 January 2005 63860 doc D Restart after Emergency Stop Command RESET Figure 13 Switches and Indicators panel RESET button To restart after an Emergency Stop caused by an ECU release the 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 normal start procedure Refer to paragraph 6 2 WARNING DANGER WHEN RESTARTING To avoid repeating a dangerous situation do not restart the equipment before finding the reason for activation of the External Stop Command emergency off switch and correcting the cause E E a mn ada 6 7 MINAC Systems Revision A LEAN USER MANUAL 31 January 2005 63860 doc EFD Disturbance of Operation and Corrective Measures Every operational failure results in an interruption of the output power The FAILURE lamp on the operating panel and an alarm message in the MMI display indicate the fault Before restarting the converter find the reason for the alarm and eliminate the
29. nits wv ev e A When the frequency converter is turned on the system automatically enters menu 24 Display Values If the Timer or Sequence functions are enabled menu 23 Display Timer Sequence is entered instead In Twin units menu 36 Display Twin Values can be selected to view information of both outputs One of these menus is selected as the opening menu to facilitate operation once all settings have been entered The operator does not need to use the keyboard to obtain information on the operational values during the heating process Pressing F9 shows the Main Menu Activate Menu menu 2 This menu enables the operator to choose control functions To make a choice the operator presses the keys in front of the given options Sequence and Timer are mutually exclusive functions Pressing F4 calls up the PIN Code Menu Press F5 to shift the menu through the possible languages until the desired language is present FO Sequence lt ACTIVE OFF gt A as oe a lI A ia EEN H D yee ee e EE mn dd Me 9 2 2 MINAC Systems Revision A AS oro MANUAL 31 January 2005 E D F1 Timer lt ACTIVE OFF gt F2 Water auto shut off lt ACTIVE OFF gt F3 Energy supervision lt ACTIVE OFF gt F4 PIN code lt ACTIVE OFF gt F5 Language Change to next available language F6 Extended Operating Range lt ACTIVE OFF gt F8 Select Ext interface lt Hardwired Fieldbus1 gt Return to the Main Menu by pressing F9 PIN Code Menu m
30. nternal electronic circuits must be repaired by qualified personnel Internal circuits are shorted to ground Fuse Fan Broken fan motor Any failure on the internal electronic Indicates current limiter circuits has to be repaired by qualified for the internal cooling personnel fans is active On twin units this alarm will stop both outputs System reset by For safety reasons the Press the RESET button to make Watch Dog micro controller is reset the unit ready for use Timeout automatically if a software Any failure on the internal electronic On twin units this or hardware condition circuits must be repaired by alarm is activated in stops it from operation The qualified personnel only both outputs unit will be restored as after a startup After such a reset this alarm will be active Overtemp Inverter Clogged water channels in Press the RESET button to make Indicates too high inverter the unit ready for use if possible temperature at the Damaged transistors in Inspect water flow in inverter inverter heat sink Inverter Any failure on the internal electronic On twin units this alarm Electronics fault circuits has to be repaired by will stop both outputs qualified personnel Wm mm MINAC Systems Revision A LEAN USER MANUAL 31 January 2005 63860 doc EFD Aam ProbableCause Corrective Action Main contactor off The main contactor is Refer to the emergency stop alarm not energized
31. ntioned systems for short circuits Only qualified personnel shall repair a failure on the internal electronic circuits Check that the coil is within the system performance Inspect the above mentioned systems for short circuits Only qualified personnel shall repair a failure on the internal electronic circuits Low frequency alarm Too low or too high frequency is most commonly caused by an incorrectly designed induction coil The coil may have too large or too small an area or it may be short circuited Operation at full load with a very low frequency 7 8 kHz may also be the cause lt may also be an error on the internal power supply or other internal electronic circuits High frequency alarm mn A m MINAC Systems Revision A LEAN USER MANUAL 31 January 2005 63860 doc E D Alarm ProbableCause Bees Gegen Over current Possibly caused by a short 1 Check for short circuits in the driver alarm in the output circuit or a induction coil and its terminals Make malfunctioning transistor If sure that the workpiece does not the alarm can not be reset short circuit the coil during operation there is a malfunctioning Only qualified personnel shall repair transistor It may also be a failure on the internal electronic an error on the internal circuits power supply or other internal electronic circuits Indicates an over current in the inverter Inductive An error in the internal
32. o equipment and surroundings Please note the following e To avoid personal injury do not remove the equipment s covers or panels Do not under any circumstances operate the equipment without the covers and panels properly installed e Switch off the equipment s power supply when it is not in use and always retract the mains plug prior to repair or maintenance e Always comply with all safety measures when handling electrical equipment including any national or international regulation 2 2 2 3 MINAC Systems Revision A LENS USER MANUAL 31 January 2005 63860 doc EFD Electric Shocks WARNING Electrical shocks can result in personal injury or loss of life To avoid the risk of an electric shock DO NOT e open the equipment covers during operation e cut or damage the HF cable to the HHT e touch the induction coil or coil adapter terminals after the power is turned on e open the equipment covers during service without retracting the mains plug in order to isolate the equipment from the main power supply WARNING Always retract the main power plug before opening the main fuse box Heated Objects WARNING Heated objects can cause 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 electrically conductive material is placed inside the coil eddy currents will be i
33. onverter s regulation system needs some current feedback to function Distance to Workpiece The efficiency of the coil decreases as the distance to the workpiece increases The best results are obtained where the distance between coil and workpiece is 1 3 mm Practical reasons such as the shape of the workpiece may require a larger air gap between the coil and the workpiece although this may reduce efficiency A MA a a ar lI A ia EEN E e a a e EE Wm e A 6 4 6 5 AO TREN AURA MINAC Systems Revision A USER MANUAL 31 January 2005 63860 doc EFD Normal Stop 1 Turn the output power off by pressing the POWER OFF button on the operating panel or an equivalent actuator on the ECU or by releasing the button on the HHT handle 2 Turn off the main disconnector 3 When the MINAC is turned off a built in magnetic valve closes the water flow to the converter Any external inlet outlet water valves should be closed when the equipment is left unsupervised for a time Some 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 and deactivate the auto water shut off system before supplying compressed air to the water inlet tailpiece refer to 6 3 2 Keep the outlet tailpiece open Do not use a Snap action valve Emergency Stop lf an Emergency Stop input is ge
34. outside the normal ratings for cooling water flow and temperature When this function 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 temperature is increased If this function is activated a footer message flashes alternating with the normal message If output power is reduced limited by this function Output reduced by EOR is shown in the footer message For further information refer to paragraph 5 1 1 The EOR function is activated deactivated in the Activate Menu NOTE The EOR function must be used with great care Because the output power can vary with variations in the cooling water supply repeatability can not be guaranteed Select Ext interface optional This function is only available on units specially equipped with both hardwired external plug and a fieldbus connection By setting this function to Hardwired all external control input to the unit must come from the hardwired external plug By setting it to Fieldbus 1 all external control input to the unit must come from the fieldbus connection Both external connections will however provide information out regardless of the selected function Refer to specifications for details on water flow alarm level and over temperature alarm level when EOR is activated as this is equipment dependent Paes es ov a ID A
35. possible cause s WARNING Do not open the equipment s covers or panels during operation Refer trouble shooting to qualified personnel EFD personnel or qualified on site maintenance personnel normally should take corrective actions However the operator may handle the alarm situations set out below If these actions do not restore normal operation the operator must record the error message and contact 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 be of help in further fault finding This data will include current voltage power and frequency readings at the time of the fault or just before the fault occurred All fault finding and corrective actions by on site maintenance personnel should normally be performed with the main disconnector turned off Always comply with all safety measures when handling electrical equipment including any national or international regulations WARNING HIGH VOLTAGE The unit must never be left unsupervised when the power supply is turned on and protective covers are removed Such conditions involve a risk to life and equipment The following operational failures are indicated by alarm messages on the MMI display and the FAILURE lamp on the operating panel The failures probable Causes and corrective actions are listed below A as oe a lI A ia E
36. r 0 100 control range Setpoint source EXT or DEFAULT for foot controller LOC for foot switch Alarms during start up If any alarm is activated during the start up sequence an alarm message will pop up in the footer area of the display If an alarm is activated find the cause of the alarm and remove it refer to paragraphs 5 1 1 and 6 7 Press the RESET button to reset the FAILURE lamp WARNING Do not remove the equipment s covers or panels Refer trouble shooting to qualified personnel Normal Operation WARNING PACEMAKERS Anyone wearing a pacemaker may be at risk when in the vicinity of the induction heater s coil section There is a risk that the electromagnetic fields produced by the induction heating unit may interfere with the performance of the pacemaker WARNING RISK OF BURNS Avoid wearing materials that conduct electricity close to the body Energize the coil only when it is in the vicinity of the workpiece 6 3 1 6 3 2 MINAC Systems Revision A LEAN USER MANUAL 31 January 2005 63860 doc EFD Operational Information During normal operation select one of the MMI information screens e Display Values menu 24 e Display All Values menu 19 e Display Timer Sequence menu 23 e Display Twin Values menu 36 Twin units only Refer to paragraphs 5 2 9 5 2 10 5 2 11 and 5 2 12 These menus provide continuous information about current operating conditions e g output power voltages and cur
37. rent values The output frequency is displayed in the F7 Status information and in the Display Values and Display Twin Values Regardless of which menu is selected each screen contains a footer displaying alarms indications limitations and operational messages The various messages are described in paragraph 5 1 1 Control Functions Sequence The sequence function enables the operator to run specific heating sequences Eight different sequences can be programmed in the Sequence Menu menu 4 refer to paragraph 5 2 6 If the sequence function 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 external interface Timer The timer function enables the operator to run the unit at a specific time interval The duration of the interval is selected in the Timer Menu menu 7 refer to paragraph 5 2 5 If the timer function is activated the time interval starts each time a POWER ON signal is given This means that the output power is on from the moment a POWER ON signal is given until the time interval has elapsed Water Auto Shut off Activating the Water auto shut off function automatically closes the water flow 20 seconds after the output power is turned off This cuts down on water consumption To turn the power on again press the POWER ON button and hold it for a minimum of
38. ressing the button lf the HHT in use has a gun grip control handle the handle is equipped with a trigger type push button with an LED The LED indicates output power on When the push button is activated the output power will be switched on By pressing the trigger switch further the output level of the variable selected as the mode of operation is adjusted by the travel of the trigger switch When the timer sequence is activated in the Activate menu it runs with power on as long as the green button on the HHT is depressed and until the selected time has expired The HHT green button must be released before a new AA PR SSA A GE e a a a E Wm mmy 6 2 4 6 3 MINAC Systems Revision A LEAN USER MANUAL 31 January 2005 63860 doc EFD timer sequence can be started Setpoint source LOC EXT HHT or DEFAULT 4 External Control Different types of ECUs can be used to operate the frequency converter The Start up Sequence will vary depending on the type of ECU used Make sure that the LOCAL REMOTE selector is in the REMOTE position Setpoint source LOC EXT HHT or DEFAULT 4a Foot Controller foot switch The unit can be equipped with a foot controller or a foot switch The LOCAL REMOTE selector must be in the REMOTE position when operating the MINAC from a foot controller switch Turn on the output power by operating the pedal Increase the level of output power by pressing the pedal gradually if using a foot controlle
39. rgy used by the equipment during the last program run This value can be used as a reference by the energy supervision function for later runs When used as a reference the allowed percentage deviation value must be entered into the program memory Before using this energy supervision function install the converter properly and establish a perfect sequence program To calculate the exact amount of energy transferred to the workpiece subtract the losses in the inverter output circuit and coil Paes es ov a ID A ia EEN H D ye ee ee a EE mn Aan 5 2 8 MINAC Systems Revision A LEAN USER MANUAL 31 January 2005 63860 doc EFD In some cases when using temperature mode of operation it is preferred to disable energy count below a certain temperature to minimize the influence on the total energy caused by variance in the work piece start temperature This function has to be configured by EFD personnel Event output menu menu 30 In this menu a specific event can be configured to trigger an output during a sequence program run Each of the eight sequence programs can be configured separately Two types of events can trigger the output Temperature reached or Segment output They are mutually exclusive for each program number The menu is dynamic so that if no event is selected for the current program number only the three first lines in the menu are visible FO Program no lt D 7 gt F1 Temperature reached lt ACTIVE
40. rgy was used in the last sequence both overall and for each segment It is possible to store the total energy value one value per program and state an allowed energy deviation value as a percentage for comparison against later sequences The energy check result is shown on the last line FO Program no lt D 7 gt F1 Segment no lt 0 9 gt F2 Store total energy Allowed energy deviation lt 0 100 gt Segment energy kJ Total energy kJ Stored total energy kJ Energy check result lt LOW OK HIGH gt e To select the program and segment numbers press FO and F1 respectively until the desired number is displayed e To store the total energy value press F2 e To set the allowed energy deviation value enter the desired value and press the enter key Return to the Main Menu by pressing F9 Energy Supervision The purpose of the energy supervision function is to detect changes in the heating process when running the sequence function A change in the heating process is often caused by changes in the coil position relative to the workpiece or changes in the workpiece itself preheating changes in mass shape Fault situations such as short circuits in the coil can also cause changes in the heating process To make use of the energy supervision function do not run the converter in the DC power mode In the DC power mode the converter itself compensates for any changes in the heating process Total energy is the amount of ene
41. rom the source where the power on command is detected If HHT handle is not equipped with a power control device make sure not to select HHT as Setpoint source as this will result in zero setooint value A as oe a lI A ia EEN H D yee ee e EE mn a A 5 2 5 5 2 6 MINAC Systems Revision A LEAN USER MANUAL 31 January 2005 63860 doc EFD Timer Menu menu 7 This menu enables the operator to program the timer FO Time Unit lt 0 1 s 1 s 0 1 m 1 m 0 1 h gt Time lt 0 999 gt Select the time unit by pressing the FO key Use the down arrow key to go to the Time line Enter the number of seconds s minutes m hours h using the number keys followed by the enter key J Return to the Main Menu by pressing F9 Sequence Menu menu 4 This menu enables operators to set up eight different programs each composed of ten different segments Type time unit time and target setpoint must be defined for each segment FO Program no lt D 7 gt F1 Segment no lt 0 9 gt F2 Type lt Step Ramp gt F3 Time unit lt 0 1 s 1 s 0 1 m 1 m 0 1 h gt Time lt 0 999 gt Target setpoint lt 0 100 gt or lt 0 250 C gt 100 corresponds to lt kW A C gt F4 Energy menu menu 08 To select a program number segment number segment type and time unit press the relevant function key until the requested number option is displayed To set time and target setpoint use the arrow keys type in the requested number and press the enter
42. s KEE a E ent ii e ee e EE mn a 2 1 MINAC Systems Revision A LEAN USER MANUAL 31 January 2005 63860 doc EFD SAFETY INSTRUCTIONS PRECAUTIONS AND HAZARDS General Safety instructions including important information concerning the risks associated with specific operations and recommendations on suitable precautions are found throughout the handbook where appropriate The safety instructions are divided into the two categories Warnings and Cautions WARNING Warning statements identify conditions or practices that could result in injury or loss of life CAUTION Caution statements identify conditions or practices that could result in damage to equipment and surroundings Safety precautions must be observed during all phases of operation and maintenance Failure to comply with these precautions or with specific WARNINGS and CAUTIONS given elsewhere 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 MUST thoroughly read understand and obey the safety instructions that apply to this equipment given by EFD Induction a s Only properly trained personnel who are familiar with the technical handbook should be permitted to open the covers for servicing this equipment WARNING Comply with all safety instructions Failure to do so can result in serious personal injury or damage t
43. u provides information on normal operational values It displays a continuous graphical presentation of AC current and DC power The programmed setpoint is marked on the bar graph representing the selected mode of operation The AC current frequency is indicated on the right upper side of the AC current bar graph Return to the Main Menu by pressing F9 The Display Values Menu also contains a Display All Values sub menu Press FO to call up this menu Display All Values menu 19 This menu shows all normal operational values in the form of bar graphs These values are AC current DC power DC voltage and DC current The bar graph representing the value selected as the mode of operation is marked with the setpoint value Return to the previous menu by pressing F9 Display Timer Sequence menu 23 This menu provides a continuous graphical presentation of the current sequence or timer function 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 AC current or DC power The setpoint is marked on the bar graph If energy supervision is activated a smiley will show whether the energy check result is OK or not OK LOW HIGH Return to the Main Menu by pressing F9 Display Twin Values menu 36 Only Twin units This menu provides information on operational values of both outputs in Twin
44. units The menu is split horizontally into two parts with the upper part showing information related to output 1 and the lower part correspondingly to output 2 Each part displays a graphical presentation of AC current and DC power and indicates the setpoint and AC current frequency A footer message of the type found in the other menus is at the bottoms of both the upper and lower parts The output number is displayed to the right of each footer message Return to the Main Menu by pressing F9 Status menu F7 menu 29 This menu displays the following parameters e Water flow dl min e Water temperature C e Output current frequency kHz e Up to 6 active alarms if any Return to the Main Menu by pressing F9 As es ID A a EEN H Ee vest a ee Ve s et E mn Deal MINAC Systems Revision A EAS USER MANUAL 31 January 2005 63860 doc E FP D 6 OPERATION WARNING To avoid personal injury do not open the equipment s covers or panels Under any circum stances do not operate the equipment without the covers and panels properly installed 6 1 Before Starting 1 Place the 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 specifications WARNING PROTECTIVE GROUNDING To avoid electric shocks make sure the protective grounding conductor for the main power cable
45. w and temperature preventing further increases in output power Messages During Normal Operation e Ready The unit is ready for operation Operate a POWER ON device e Power On The output power is turned on e DC Power DC power is the current mode of operation e AC Current AC current is the current mode of operation e Timer Active The timer function is active e Sequence Active The sequence function is active A as oe a lI A ia EEN H D yee ee e EE mn a A 9 2 9 2 1 MINAC Systems Revision A AS USER MANUAL 31 January 2005 63860 doc EFD e Extended Operating Range Activated The Extended operating range function has been activated enabling the unit to operate outside the normal ratings for cooling water flow and temperature This message flashes alternating with the rest of the Messages during normal operation e Water tank level low warning A connected sensor in an optional cooling water tank has detected low level Please refill water tank and check for leaks in water cooling system This message flashes alternating with the rest of the Messages during normal operation Menus The Main Menu consists of the following sub menus FO Activate menu menu 2 F1 Setpoint menu menu 3 F2 Timer menu menu 7 F3 Sequence Energy menu menu 4 F4 Display Values menu 24 F5 Display Timer Sequence menu 23 F6 Display Twin Values menu 36 F7 Status info menu 29 visible only in Twin u

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