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Siemens LME71 Series Basic Documentation
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Siemens LME71 Series Basic Documentation

Burner control
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LME71... / LME72... / LME73...
Burner control
Basic Documentation
Software version 02.03
CC1P7105en
24.07.2020
The LME7 and this Basic Documentation are intended for use by OEMs which
integrate the burner controls in their products.
Smart Infrastructure

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Summary of Contents for Siemens LME71 Series

  • Page 1 LME71… / LME72… / LME73… Burner control Basic Documentation The LME7 and this Basic Documentation are intended for use by OEMs which integrate the burner controls in their products. Software version 02.03 Smart Infrastructure CC1P7105en 24.07.2020...
  • Page 2 Supplementary documentation Designation Type of documentation Product type Documentation number PME71.111Ax Program module User Documentation A7105.1 PME71.112Ax Program module User Documentation A7105.2 PME71.401Ax Program module User Documentation A7105.3 PME71.402Ax Program module User Documentation A7105.4 PME71.901Ax Program module User Documentation A7105.5 LME71.901Ax Program module User Documentation...

  • Page 3: Table Of Contents

    Contents Safety notes ..................... 8     Warning notes ....................8     Mounting notes ....................9     Installation notes .................... 10     Electrical connection of flame detectors ............11     Commissioning notes ..................12     Standards and certificates ................
  • Page 4 4.10 Dummy plug for RJ11 ..................34     4.11 Environmental conditions ................35     4.12 Flame supervision ..................36     4.12.1 Ionization probe ..................... 36     4.12.2 QRA2 / QRA4 / QRA10 (LME71 / LME73 only) ..........38  ...
  • Page 5 11.1.2 Connection diagram for load controller (LME71/LME73 only) ....... 57     11.2 Actuators ....................... 57     11.3 Function ......................57     11.4 Load controller inputs ..................58     11.4.1 3-position step input terminal X5-03 .............. 58  ...
  • Page 6 13.6.2.2. Identification number ..................71     13.6.2.3. Identification of burner ................... 72     13.6.2.4. Number of startups resettable ............... 73     13.6.2.5. Total number of startups ................74     13.6.2.6. End of info level ..................... 74  ...
  • Page 7 15.4.4 Display of preset output ................103     15.5 Manual adjustment (depending on the PME7) ..........104     15.5.1 Position of actuator or speed of PWM fan in modulating operation with   analog signal ....................104   15.6 Initial startup with a new PME7 or in case of replacement of the PME7 ..

  • Page 8: Safety Notes

    The LME7 are safety devices! Do not open, interfere with or modify the unit. Siemens does not assume responsibility for damage resulting from unauthorized interference! Additional safety notes contained in other chapters of this document must be observed as well! ...

  • Page 9: Mounting Notes

    To ensure safety and reliability of the LME7 system, the following points must also be observed: Condensation and ingress of humidity must be avoided. Should such conditions occur, make sure that the unit will be completely dry before switching on again! If not observed, there will be a risk of electric shock Static charges must be avoided since they can damage the unit’s electronic components when touched.

  • Page 10: Installation Notes

    Since the BCI has no safe separation from mains voltage, the signal cable AGV50 between LME7 and AZL2, or LME7 and OCI410, must conform to certain specifications. Siemens has specified the signal cable AGV50 for use under the burner hood (see Technical data). When using signal cables of other manufacture, Siemens’...

  • Page 11: Electrical Connection Of Flame Detectors

    Electrical connection of flame detectors It is important to achieve practically disturbance- and loss-free signal transmission:  Never run the detector cable together with other cables – Line capacitance reduces the magnitude of the flame signal – Use a separate cable ...

  • Page 12: Commissioning Notes

    Commissioning notes Prior to commissioning the system, the following points must be checked:  The correct assignment of the fuel valves to the fuel valve outputs on the LME7  Correct setting of the time parameters, especially the safety and prepurge times ...

  • Page 13: Standards And Certificates

    The electrical connections of the LME7 and the PME7 comply with the requirements of EN 60335-2-102. EAC Conformity mark (Eurasian Conformity mark) ISO 9001:2015 ISO 14001:2015 OHSAS 18001:2007 China RoHS Hazardous substances table: http://www.siemens.com/download?A6V10883536 Only AC 120 V versions 13/116 Smart Infrastructure Basic Documentation LME7... CC1P7105enr 1 Safety notes 24.07.2020...

  • Page 14: Lifetime

    1.7 Lifetime The LME7 has a designed lifetime* of 250,000 burner startup cycles which, under normal operating conditions in heating mode, corresponds to approx. 10 years of service (starting from the date of manufacture on the unit type plate). This lifetime is based on the endurance tests in the standard EN 298.

  • Page 15: Typographical Conventions

    The device may only be used on the applications described in the technical documentation and only in connection with devices or components from other suppliers that have been approved or recommended by Siemens. The product can only function correctly and safely if shipped, stored, set up and installed correctly, and operated and maintained as specified.

  • Page 16: System Makeup / Function Description

    System makeup / function description The LME7 is a microprocessor-based burner control with matching system components for controlling and supervision of forced draft burners of medium to large capacity. LME7 are used for the startup and supervision of 1- or 2-stage forced draft burners in intermittent operation.

  • Page 17: Features

    The LME7 system components (AZL2) are connected directly to the LME7 via BCI. All safety-related digital inputs and outputs of the system are supervised by a contact feedback network. For intermittent operation, the ionization probe and the QRA2, QRA4 or QRA10 (optional) can be used in connection with the LME7. The LME7 is operated and parameterized via the AZL2 or ACS410.

  • Page 18: Type Summary

    Type summary 3.1 Burner controls Parameterized burner control for the supervision of multistage or modulating oil/gas forced draft burners and atmospheric burners of medium to higher capacity, in intermittent operation. With controlled air damper control. Article no. Type ● ● Mains voltage AC 120 V ●...

  • Page 19: Program Module

    3.2 Program module 3.2.1 PME7 with mains voltage AC 120 V PME7 for LME7, with program sequences for oil burners or gas burners. Example: Article no. Type ● ● ● ● ● Mains voltage AC 120 V ● ● ● ●...
  • Page 20 Article no. Type ● ● ● ● ● ● ● ● Mains voltage AC 120 V For use with LME71.000A1 For use with LME72.000A1 ● ● ● ● ● ● ● ● For use with LME73.000A1 ● Forced draft burner oil program ●...

  • Page 21: Pme7 With Mains Voltage Ac 230 V

    3.2.2 PME7 with mains voltage AC 230 V Example: Article no. Type ● ● ● ● ● ● ● Mains voltage AC 230 V ● ● ● ● ● For use with LME71.000A2 ● ● For use with LME72.000A2 For use with LME73.000A2 ●...
  • Page 22 Article no. Type ● ● ● ● ● ● ● ● Mains voltage AC 230 V For use with LME71.000A2 For use with LME72.000A2 ● ● ● ● ● ● ● ● For use with LME73.000A2 ● Forced draft burner oil program ●...

  • Page 23: External Display And Operating Units

    3.3 External display and operating units AZL21.00x9 Article no.: BPZ:AZL21.00x9 Display and operating unit, detached, choice of mounting methods, 8-digit LCD, 5 buttons, BCI for LME7, degree of protection IP40. See Data Sheet N7542 AZL23.00x9 Article no.: BPZ:AZL21.00x9 Display and operating unit, detached, choice of mounting methods, 8-digit LCD, 5 buttons, BCI for LME7, degree of protection IP54.

  • Page 24: Flame Detectors

    The QRC is primarily used in connection with burner Lateral illumination: controls for burners of small capacity. Refer to data sheet N7716. Ionization probe Flame detector for Siemens burner controls, for supervision of gas flames. To be provided on site 24/116 Smart Infrastructure Basic Documentation LME7...

  • Page 25: Actuators

    3.5 Actuators SQN3 Electromotoric actuators for air dampers and control valves of oil and gas burners of small to medium capacity. Holding torque / running time 0.8 Nm / 4.5 s until 3 Nm / 30 s See Data Sheet N7808 SQN7 Electromotoric actuators for air dampers and control valves of oil and gas burners of small to medium capacity.

  • Page 26: Connector Sets For Lme7

    3.8 Connector sets for LME7 AGG3.710 Article no.: BPZ:AGG3.710 Connector set complete for LME7 RAST5 and RAST3.5 Example: Single packs Terminal X5-03 See List or parts C7105 (74 319 0642 0) AGG3.720 Article no.: BPZ:AGG3.720 10 standard connector sets complete for LME7 RAST5 and RAST3.5 Single packs The several connectors are delivered into bags to 10 pieces...

  • Page 27: Service- Tools

    3.9 Service- tools OCI410 Article no.: BPZ:OCI410 Interface between burner control and PC Facilitates viewing, handling and recording setting parameters on site in connection with the ACS410 software See Data Sheet N7616 ACS410 Article no.: BPZ:ACS410 PC software for setting the parameters and for visualizing the burner controls See Software Documentation J7352 27/116...

  • Page 28: Technical Data

    Technical data 4.1 Basic unit LME7 Mains voltage AC 120 V AC 230 V Mains frequency 50/60 Hz 50/60 Hz External primary fuse Max. 6.3 A (slow) Max. 6.3 A (slow) Caution! Risk of damage to the switching contacts! If the external primary fuse (Si) is blown due to overload or short-circuit at the terminals, the LME7 must be replaced.

  • Page 29: Terminal Rating Inputs

    4.2 Terminal rating Inputs Mains supply: The input current for the mains supply is dependent on the operating status of the LME7 Under voltage 120 V 230 V Mains Mains  Safety shutdown from the operating ≤AC 75 V ≤AC 165 V position takes place should mains voltage drop ...

  • Page 30: Terminal Rating Outputs

    4.3 Terminal rating Outputs Total contact loading:  Rated voltage 120 V AC, 50/60 Hz 230 V AC, 50/60 Hz  Terminal X3-04: LME7 input current Max. 5 A Max. 5 A  Note The input current for the LME7 at terminal X3-04 pin 5 also flows through safety loop terminal X3-04 pin 1 / pin 2.
  • Page 31 Terminal X6-03 pin 3: Safety valve  Rated voltage 120 V AC, 50/60 Hz 230 V AC, 50/60 Hz  Rated current 1.5 A 1.5 A  Cos 0.6 Cos 0.6 Power factor Terminal X7-01 pin 3: Fuel valve or pilot valve (depending on the fuel train, refer to User Documentation A7105.x) ...

  • Page 32: Cable Lengths

    4.4 Cable lengths Terminal X2-01: Fan motor Max. 30 m (100 pF/m), unshielded Terminal X2-02: Multifunctional input Max. 30 m (100 pF/m), unshielded (POC, valve proving pressure switch), refer to User Documentation A7105.x Terminal X2-03 pin 1/2: Remote lockout Max. 30 m (100 pF/m), unshielded reset (laid separately) Terminal X2-03 pin 2/3: Alarm Max.

  • Page 33: Actuators

    4.5 Actuators CLOSE / ignition position / OPEN 1 mio. switching 1 mio. switching terminal X2-09 pin 1, X2-09 pin 2, X2- cycles cycles 09 pin 3  Rated voltage AC 120 V 50/60 Hz AC 230 V 50/60 Hz ...

  • Page 34: Rast5 Connector

    4.7 RAST5 connector 4 N Mechanical data Insertion force / contact Withdrawal force / contact 1 N Tightening torque / screw 0.5 Nm in accordance with DIN EN 60335-1 Contacting with flat pin connector 6.3 x 0.8 mm in accordance with DIN EN 46244 Male multipoint connector to RAST5 standard...

  • Page 35: Environmental Conditions

    4.11 Environmental conditions Storage EN 60721-3-1:1997 Climatic conditions Class 1K3 Mechanical conditions Class 1M2 Temperature range -40...+70 °C Humidity <95% r.h. Transport EN 60721-3-2:1997 Climatic conditions Class 2K3 Mechanical conditions Class 2M2 Temperature range -40...+70 °C Humidity <95% r.h. Operation EN 60721-3-3:1994 Climatic conditions Class 3K3...

  • Page 36: Flame Supervision

    4.12 Flame supervision 4.12.1 Ionization probe No-load voltage at terminal ionization AC 300 V probe (terminal X10–05 pin 2) Warning!  The ionization probe must be protected against electric shock hazard!  When monitoring ionization currents in earth-free mains, connect terminal X10-05 pin 1 to burner ground Short-circuit current Max.
  • Page 37 LME... Connection diagram LME7 connection assignment: Terminal X10-05 pin 2 flame signal ionization input 7105z23/1218 Ionization probe Measuring circuit for detector current measurement LME7... X10-05/2 X10-05/1 Figure 4: Measuring circuit for ionization probe Legend Electrolytic condenser 100...470 µF; DC 10...25 V Ionization probe Microammeter Ri max.

  • Page 38: Qra2 / Qra4 / Qra10 (Lme71 / Lme73 Only)

    4.12.2 QRA2 / QRA4 / QRA10 (LME71 / LME73 only) Caution! If QRA2-UV tubes, QRA4-UV tubes, or QRA10-UV tubes are used for flame supervision on the LME7, it must be ensured that the burner control is permanently connected to power (EN 298), thus enabling the system to detect detector failures during startup and shutdown.

  • Page 39: Qrb1/Qrb3/ Qrb4

    4.12.3 QRB1/QRB3/ QRB4 No-load voltage at the QRB4 terminal Approx. 5 V DC (X10–05, terminal 3) Required detector current in operation Min. 20 µA (display intensity approx. 35%) Possible detector current in operation Max. 60 µA (display intensity 100%) Perm. length of detector cable Max.
  • Page 40 Green LED for Detector current in operation: Detector current in operation:   indication of operating Flame signal instable Flame signal stable   mode Green LED flashing Green LED steady on < 50% > 50% Connection diagram Black Blue Measuring circuit for detector current measurement...

  • Page 41: Qrc

    4.12.4 QRC Warning! The QRC is only suitable for operation at 230 V AC. Failure to observe this information poses a risk of damaging the safety functions. Operating voltage 230 V AC ±15% 50 to 60 Hz 6% Mains frequency Required detector current in operation Min.

  • Page 42: Dimensions

    Dimensions Dimensions in mm LME7 7105m02en/0316 Figure 6: Dimensions of LME7 42/116 Smart Infrastructure Basic Documentation LME7... CC1P7105enr 5 Dimensions 24.07.2020...

  • Page 43: Function

    Function 6.1 Preconditions for burner startup   LME7 is reset  All contacts in the line are closed, there is a request for heat  No undervoltage  Air pressure switch or POC must be in its no-load position, or Dbr1 is connected to terminal X2-02 (depending on program sequence) ...

  • Page 44: Control Sequence In The Event Of Fault

    6.4 Control sequence in the event of fault If a non-alterable lockout occurs, the outputs for the fuel valves, the burner motor and the ignition equipment are always immediately deactivated (<1 second). Cause Response Mains voltage failure Restart Voltage below undervoltage threshold Safety shutdown Voltage above undervoltage threshold Restart...

  • Page 45: Restart Limitation

    6.6 Restart limitation Depending on the PME7, refer to User Documentation A7105.x. 6.6.1 Restart in the event of loss of flame If the flame is lost during operation, a certain number of restarts per controlled startup can be performed via the control thermostat or pressurestat depending on the parameter settings in the PME7, otherwise a non-volatile lockout will be initiated.

  • Page 46: Operation, Indication, Diagnostics

    Operation, indication, diagnostics 7.1 Operation The lockout reset button (info button) is the key operating element for resetting the burner control and for activating / deactivating the diagnostics functions. Yellow The multicolor signal lamp is the key indicating element for visual diagnostics.

  • Page 47: Diagnostics Of Cause Of Fault

    7.3 Diagnostics of cause of fault After a non-alterable lockout, the red fault signal lamp (LED) lights up. In that condition, visual diagnostics of cause of fault according to the error code table can be activated by pressing the lockout reset button (info button) for more than 3 seconds.
  • Page 48 Error code table Red blink code of fault signal lamp Possible cause 2 x blinks No establishment of flame at the end of the safety time - Faulty or soiled fuel valves - Defective, soiled or incorrectly connected flame detector - Poor adjustment of burner, no fuel - Faulty ignition equipment 3 x blinks...

  • Page 49: Inputs / Outputs

    Inputs / outputs Figure 8: Inputs / outputs 49/116 Smart Infrastructure Basic Documentation LME7... CC1P7105enr 8 Inputs / outputs 24.07.2020...

  • Page 50: Connection Diagram Agg9 Connector

    Connection diagram AGG9 connector 9.1 LME71 Figure 9: Connection diagram LME71  AGG9 50/116 Smart Infrastructure Basic Documentation LME71… / LME72... / LME73 CC1P7105en 9 Connection diagram AGG9 connector 24.07.2020...

  • Page 51: Lme72

    9.2 LME72 Figure 10: Connection diagram LME72  AGG9 51/116 Smart Infrastructure Basic Documentation LME71… / LME72... / LME73 CC1P7105en 9 Connection diagram AGG9 connector 24.07.2020...

  • Page 52: Lme73

    9.3 LME73 Figure 11: Connection diagram LME73  AGG9 52/116 Smart Infrastructure Basic Documentation LME71… / LME72... / LME73 CC1P7105en 9 Connection diagram AGG9 connector 24.07.2020...

  • Page 53: Lme7 Burner Control

    10 LME7 burner control 10.1 Description of inputs and outputs Note  This chapter covers the basic features of the inputs and outputs of the LME7. For an exact evaluation of the inputs and activation of the outputs, refer to the sequence diagrams.

  • Page 54: Digital Input

    10.2 Digital input 10.2.1 Safety Loop terminal X3–04 pin 1 and 2 Input for connection of the safety loop. When any of the series-connected contacts included in the loop opens, power supply to the fuel valves, the fan and the ignition equipment is instantly cut.

  • Page 55: Air Pressure Switch Terminal X3-02

    10.2.3 Air pressure switch terminal X3–02 Input for connection of an air pressure switch. Air pressure is anticipated when the fan is switched on. If there is no air pressure signal, the system initiates lockout. The air pressure switch must have an NO contact. If no air pressure switch is required (e.g.

  • Page 56: Multistage Or Modulating Mode With Actuator

    Multistage or modulating mode with actuator 11.1 Relevant parameters Parameter Meaning Minimum output control step Opening time of actuator (timeout) Closing time of actuator (timeout) Analog input (feedback potentiometer ASZxx.3x required) 0 = 3-position step input 1 = DC 0...10 V 2 = 0...135 ...

  • Page 57: Connection Diagram For Load Controller (Lme71/Lme73 Only)

    11.1.2 Connection diagram for load controller (LME71/LME73 only)  Note! The connection diagram shown is merely an example which must be verified in the individual case depending on the application! PME7 0-135 Figure 17: Connection diagram for load controller 11.2 Actuators The LME7 has terminals for the connection of electromotoric actuators for the control of air dampers and regulating dampers of oil and gas burners.

  • Page 58: Load Controller Inputs

    11.4 Load controller inputs 11.4.1 3-position step input terminal X5-03 The load controller input is valued by making a 2-out-of-3 section. This means that to trigger a control action via the actuator outputs, an ON or OFF signal must be identified within at least 2 successive cycles.

  • Page 59: Multistage / Modulating Mode Via 3-Position Step Input Terminal X5-03

    11.5 Multistage / modulating mode via 3- position step input terminal X5-03 The signal time of a control pulse is a minimum of 147 ms. 11.5.1 Maximum possible resolution The maximum possible resolution via 3-position step input terminal X5-03 is calculated according to the following formula: Working range in angular degrees x 0.147 s ---------------------------------------------------- = maximum possible resolution in angular degree...

  • Page 60: Setting The Minimum Power Control Step (Dead Band) (Parameter 123)

    11.7 Setting the minimum power control step (dead band) (parameter 123) in modulating mode via analog input signal terminal X65 (LME71/LME73 only) The minimum output control step must be greater than or equal to the percentage proportion of the maximum resolution of the entire modulation range and, depending on the actuator’s running time (protection against hunting).

  • Page 61: User Limitations / Application Examples

    User limitations / application examples Application Typical resolution Typical modulation range Actuator control Controller with via LME73 - pulse lengths min. 150 ms 1 : 30 / 1 : 50 3 position control - approx. 0.5° LME73 - with 30 s running time For boiler and 0...90°...

  • Page 62: Safety Notes Relating To Operation Of Azl2

    12 Safety notes relating to operation of AZL2 Caution! The following information must be observed to prevent the risk of fire or explosion, damage to the heating plant or damage resulting from improper usage: The LME7 described in this basic documentation may only be used as specified and only in connection with the appropriate burner and heating plant.

  • Page 63: Operation Via Azl2

    Operation via AZL2 13.1 Description of the unit / display and buttons Function and operation of versions AZL21 and AZL23 are identical. /reset h min s Figure 18: Description of the unit / display and buttons Button Function Buttons A and F: Parameterized function - For switching to parameter setting mode P (press simultaneously)

  • Page 64: Meaning Of Symbols On The Display

    13.2 Meaning of symbols on the display Fault status message Flame present Valve controlled Ignition controlled Fan motor controlled Oil preheater on Heat request from controllers Parameter setting mode Info mode Service mode h min s Actuator closing Actuator opening Unit of current display Figure 19: Meaning of display 13.3...

  • Page 65: Operation

    13.4 Operation Warning! All changes to parameters and settings are only set and saved in the internal unit memory of the LME7. A backup must be triggered manually to save the modified settings to the PME7. Failure to observe this information poses a risk of the safety functions being impaired. ...

  • Page 66: List Of Phase Display (Display Depending On Program)

    List of phase display (display depending on program)  Note Display depending on the PME7, refer to User Documentation A7105.x. Phase number Function AZL2 display Standby Standby, waiting for heat request Ph08 Power ON / test phase (e.g. detector test) Startup Ph21 Safety valve ON, air pressure switch test / POC test (timeout / locking after 5 seconds),...

  • Page 67: Display Of Operating Position

    13.4.1.3. Display of operating position Display oP: P1 means stage 1. Display after oP is unit-specific. h min s Display oP: P2 means stage 2. Display after oP is unit-specific. Display oP: means modulating operation. Display after oP: is unit-specific. Display shows the relative value of the actual position of actuator (51).

  • Page 68: Fault Status Messages, Display Of Errors And Info

    13.4.1.4. Fault status messages, display of errors and info Display of errors (faults) with lockout The display shows Loc:. The bar under the fault status message appears. The LME7 is in lockout position. The current error code is displayed (refer to Blink code h min s table).

  • Page 69: Menu-Driven Operation

    13.5 Menu-driven operation 13.5.1 Assignment of levels The various levels can be accessed via different button combinations. The parameter level can only be accessed by entering a password. Normal display >1 s /reset Operate >8 s Info level /reset >3 s <8 s /reset automatic...

  • Page 70: Info Level

    13.6 Info level 13.6.1 Display of info level Press until InFo appears. /reset /reset 1…3 s When releasing , you are on the info level. /reset The info level displays information about the LME7 and operation in general.  Note! On the info level, you can press to display the next or the previous parameter.

  • Page 71: Display Of Info Values

    13.6.2 Display of info values 13.6.2.1. Identification date The identification date described below corresponds to the creation date for the program sequence and cannot be changed by the user. On the left, parameter 102: is displayed blinking. On the right, ._._ is displayed. h min s Example: 102: ._._ …...

  • Page 72: Identification Of Burner

    13.6.2.3. Identification of burner On the left, parameter 113: is displayed blinking. On the right, ._._ appears. Example: 113: ._._ h min s Press for 1…3 seconds to display the /reset burner’s identification. /reset Factory setting: - - - - - - - - 1…3 s h min s Example: 3...

  • Page 73: Number Of Startups Resettable

    13.6.2.4. Number of startups resettable  Note! Can be deleted for service (see chapter Parameter list)! On the left, parameter 164: is displayed blinking. On the right, characters ._._ appear. Example: Parameter 164: ._._ h min s … Pressing the button (1 3 seconds) and /reset...

  • Page 74: Total Number Of Startups

    13.6.2.5. Total number of startups On the left, parameter 166: is displayed blinking. On the right, characters ._._ appear. Example: Parameter 166: ._._ h min s … Pressing the button (1 3 seconds) and /reset releasing it when ._._ flashes displays the total number of startups.

  • Page 75: Service Level

    13.7 Service level The service level is used to display information about errors including the error history.  Note! When on the service level, you can press to display the next or the previous parameter. Instead of pressing , you can also press for <1 second.

  • Page 76: Display Of Service Values

    13.7.2 Display of service values 13.7.2.1. Error history See Parameter with index, with or without direct display / example of parameter 701 Error history.  Note Can be deleted for service (see chapter Parameter list)! Refer to chapter Error code list! 13.7.2.2.

  • Page 77: Parameter Level

    The OEM is obliged to mark the LME7 accordingly and include at least the list of unit parameters and settings in the burner documentation. Siemens also recommends attaching an additional mark on the LME7 in the form of an adhesive label. According to EN 298, the label should be easy to read and wipeproof.

  • Page 78: Entering The Password

    13.8.1 Entering the password Note!  The OEM password must consist of 5 characters, that for the heating engineer of 4 characters. Press button combination to display CodE. >1 s h min s When releasing the buttons, 6 bars appear the first of which blinks.
  • Page 79 As a confirmation of correct entry, PArA appears for a maximum of 2 seconds. h min s  Note: For the entry of passwords or burner IDs, the following numerals and letters can be used: 79/116 Smart Infrastructure Basic Documentation LME7... CC1P7105en 13 Operation via AZL2 24.07.2020...

  • Page 80: Changing The Heating Engineer's Password

    13.8.2 Changing the heating engineer's password Note:  For the OEM to change the heating engineer’s password, c: demands entry of the OEM password! Press button combination to display 000: Int. >1 s Pressing the button takes you to parameter /reset 041 heating engineer's password.
  • Page 81 Pressing the button takes you to /reset parameter 041 heating engineer's password. Continue in the parameter End of the parameter level level to the next parameter –End- group 100: 81/116 Smart Infrastructure Basic Documentation LME7... CC1P7105en 13 Operation via AZL2 24.07.2020...

  • Page 82: Changing The Oem's Password

    13.8.3 Changing the OEM's password Parameter 042: blinks. Press to go to level c: for password changes. /reset Letter c: for confirmation appears blinking. Proceed as described in section Entering the password and enter the former password. After entry of the last character, the password must be /reset confirmed by pressing /reset...

  • Page 83: Backup

    13.8.4 Backup Parameter 000: blinks. Display: Parameter 000: blinks, display Int does not /reset Press for parameter group 041. /reset Display: Parameter 041: blinks, display ._._ does not Press for parameter 060. Display: Parameter 060. blinks, index 00: and value 0 do /reset Press for parameter rEStorE.
  • Page 84 Press for value 1. Display: Value 1 blinks /reset Press to activate the backup process. /reset Display shows run After approx. 3 seconds (depending on the duration of the program sequence), the displays shows bAC End and <3 s signals the end of the backup process. Display: bAC End It will now be displayed for 2 minutes, or can be finished by pressing the button...

  • Page 85: Restore

    13.8.5 Restore Parameter 000: blinks. Display: Parameter 000: blinks, display Int dos not /reset Press for parameter group 041. /reset Display: Parameter 041: blinks, display ._._ does not. Press for parameter 060. Display: Parameter 060. blinks, index 00: and value 0 do not.
  • Page 86 /reset Press to activate the restore process. /reset Display shows run After approx. 3 seconds (depending on the duration of the program sequence), the displays shows rSt End and <3 s signaled the end of the restore process. Display: rSt End It will now be displayed for 2 minutes, or can be finished by pressing the button /reset...

  • Page 87: Operating Variants Of The Parameters

    13.9 Operating variants of the parameters The parameters stored in the LME7 can be displayed and changed at parameter level. Press button combination to display 000: Int. With , select the parameter group 100: >1 s PArA. With , select the parameter group 200: PArA.
  • Page 88 Alternative 1: Discard the change! h min s Alternative 2: Adopt the value! /reset Press to return to editing mode. /reset The value set will be adopted. Note: To detect display errors, the value appears one h min s place shifted to the right. Display: Value 3.822 h min s Back to the previous...

  • Page 89: Parameters Without Index, With No Direct Display

    13.9.2 Parameters without index, with no direct display 13.9.2.1. Example of parameter 224 (specified time air pressure switch) on the parameter level Press for specified time for air pressure signal. Display: Parameter 224: blinks, characters h min s ._._ do not. /reset Press for editing mode.
  • Page 90 Alternative 1: Discard the change! h min s Alternative 2: Adopt the change! /reset Press to return to editing mode. /reset The value set will be adopted. Note: To detect display errors, the value is shown again, h min s but shifted one place to the right.

  • Page 91: Parameters With Index, With Or Without Direct Display

    13.9.3 Parameters with index, with or without direct display 13.9.3.1. Example of parameter 701: Actual error on the service level See chapter Error code list! Press to select parameter 701. Display: Parameter 701. blinks, index 00: and error 4 do not.
  • Page 92 Press to select the index. .02 = MMI phase to the time of fault Example: h min s Parameter 701., index 02:, Phase 02 = safety shutdown To the next index Press to select the index. .03 = power value to the time of fault Example: h min s Parameter 701., index 03:, power value 60%...
  • Page 93 Press to return to the parameter level. Display: Parameter 701. blinks, index 01: and diagnostic h min s code 4 do not. To the next older error ▪ ▪ ▪ Parameters cover the period back to the last error since deletion of the history (max.

  • Page 94: Error Code List With Operation Via External Azl2 Display

    14 Error code list with operation via external AZL2 display  Note Display depending on the PME7, refer to User Documentation A7105.x. Error code Clear text Possible cause - Faulty or soiled fuel valves No establishment of flame at the end of safety - Defective, soiled or incorrectly connected flame time detector...
  • Page 95 Error code Clear text Possible cause - After the prepurge speed was reached, the minimum PWM prepurge speed was undercut (parameter 675.00) or ... Loc: 225 PWM fan faulty - After reaching the ignition load speed, the maximum ignition load PWM (parameter 675.01) was exceeded Parameterization error: - Speed low-fire >...

  • Page 96: Operation Via Internal Led

    Operation via internal LED 15.1 Description of display and buttons Figure 23: Description of display and buttons Button Function Button A - Display preset output - In lockout position: Power value to the time of fault Info and Enter button - Reset in the event of fault, changeover visual diagnostic of the cause of fault (see chapter Diagnostics of cause of fault ) - button...

  • Page 97: Normal Display

    15.2 Normal display Normal display is the standard display in normal operation. 15.2.1 Display in standby mode The LME7 is in standby. 15.2.2 Display during startup / shutdown 15.2.2.1. Display of program phases The LME7 is in phase 21 (P21). The individual program phases are displayed in accordance with the program sequence.

  • Page 98: List Of Phase Display

    15.2.2.2. List of phase display  Note Display depending on the PME7, refer to User Documentation A7105.x. Phase number Function AZL2 display Standby Standby, waiting for heat request Power ON / test phase (e.g. detector test) Startup Yellow Safety valve ON, air pressure switch test / POC test (timeout / locking after 5 seconds), actuator opens in low-fire position / CLOSE position Yellow Fan motor ON and air pressure switch test / settling time...
  • Page 99 Phase number Function AZL2 display Waiting phases (start prevention / safety shutdown phases) Red / yellow flashing Undervoltage Yellow Safety loop open  Safety shutdown, followed by a non-alterable lockout with interlocking Red / green flashing Extraneous light on burner startup (timeout / locking after 30 seconds) Yellow Pressure switch-min open ...

  • Page 100: Display Of Operating Position

    15.2.3 Display of operating position Display oP1 means stage 1. Display after oP is unit-specific. The signal lamp blinks green. 15.3 Special functions 15.3.1 Manual lockout Press simultaneously with any other button. LME7 changes from any operating position directly Alternately to lockout.

  • Page 101: Fault Status Messages, Display Of Errors

    15.4 Fault status messages, display of errors 15.4.1 Display of errors (faults) with lockout Loc and 4 are displayed alternately. The LME7 is in lockout position. Alternately The current error code is displayed and the signal lamp flashes red. Example: Error code 4 Press for display of the phase, where the fault appeared.

  • Page 102: Display Of Flame Current Ion Or Qra

    15.4.2 Display of flame current ION or QRA  Note: This display is only possible in operating mode or standby! Press for display of the flame signal amplifier. Signal lamp blinks green. Display shows FL.1. When pressing (1…3 seconds), the flame signal current is displayed.

  • Page 103: Display Of Preset Output

    15.4.4 Display of preset output Note:  Display is possible only when …  in operating mode or standby,  program sequence for modulating operation via analog preset output. Press for display of the relative current position of the actuator. Signal lamp blinks green.

  • Page 104: Manual Adjustment (Depending On The Pme7)

    15.5 Manual adjustment (depending on the PME7) 15.5.1 Position of actuator or speed of PWM fan in modulating operation with analog signal Note: Display is possible only when …   in operating mode or standby,  program sequence for modulating operation via analog preset output and with connected actuator with potentiometer for position feedback to the LME7 Press for the relative current position of the actuator or...
  • Page 105 Press for >3 seconds to display alternately LoA and The relative value 41 of the current position or current speed is displayed. Actuator position 0° Current speed 0  potentiometer value = 0 rpm = 0 display 0% display Current speed corresponds Alternately Actuator position high-fire to the rated load speed =...
  • Page 106 Note:  When the program phase (e.g. P10 - shutdown) changes during manual adjustment, the display blinks   The mode (manual adjustment mode) remains active until ‘Escape’ is used to switch the LME7 back to normal operation or until the LME7 is reset via mains ON/OFF. This means that –...

  • Page 107: Initial Startup With A New Pme7 Or In Case Of Replacement Of The Pme7

    15.6 Initial startup with a new PME7 or in case of replacement of the PME7 rSt and PrC are displayed alternately. The replacement of the PME7 is displayed. Alternately The signal lamp lights up alternately, once red and twice yellow. Press (for >3 seconds) to start data download from the PME7.
  • Page 108 Press (for > 1 second) to reset the LME7. Display OFF >1 s Warning! For initial commissioning or replacement of the PME7, the function sequence and parameter settings must be checked on completion of the restore process.  See chapter Operation via AZL2 / first startup, restore ...

  • Page 109: Manual Backup

    15.7 Manual backup Press simultaneously for >1 second (Escape) to start a manual backup process. Parameter PrC appears. Display: PrC >1 s Press for parameter bAC. Display: bAC 1…3 s run appears during download (backup process) of the program sequence. Display shows alternately End and bAC.

  • Page 110: Error During Backup Process

    15.7.1 Error during backup process Display shows alternately bAC and Er3. Alternately For meaning of a possible cause, see chapter Error code list with operation via internal LED.  Note The backup process saves all settings and parameters from the LME7 memory to the PME7. 110/116 Smart Infrastructure Basic Documentation LME7...

  • Page 111: Manual Restore

    15.8 Manual restore Press simultaneously for >1 second (Escape) for starting the manual restore process. Parameter PrC appears. Display: PrC >1 s Press for parameter rSt. Display: rSt 1…3 s run appears during download (restore process) of program sequence. Display shows alternately End and rSt. Alternately Display shows the end of data exchange.

  • Page 112: Errors During The Restore Process

    15.8.1 Errors during the restore process Alternately with Display shows alternately rSt and Er1, Er2 or Er3. or with For meaning of a possible cause, see chapter Error code list with operation via internal LED. or with  Note During the restore process, all settings and parameters are written from the PME7 to the internal memory of the LME7.
  • Page 113 Index A  Mains voltage ......76 AGG9 Special functions ....... 64 Connection diagram....50 Manual lockout ......64 AZL2 B  Description of the unit / display Basic unit and buttons ........ 63 Input gas pressure switch-min . 55 Error code list ......94 D ...
  • Page 114 Normal display......97 Multistage or modulating mode Display during startup / Relevant parameters....56 shutdown ......97 Setting the minimum power Display in standby mode ..97 control step in modulating mode Display of operating position100 via analog input signal X65 ..60 Multistage or modulating mode with Display of program phases ..
  • Page 115 Flame detectors ......24 Program module ......19 Pressure switch ......25 Service tools ......27 115/116 Smart Infrastructure Basic Documentation LME7... CC1P7105en 15 Operation via internal LED 24.07.2020...

  • Page 116: List Of Figures

    Figure 22: Service level ....................75   Figure 23: Description of display and buttons ............... 96   Siemens AG Smart Infrastructure © 2020 Siemens AG Smart Infrastructure Berliner Ring 23 Subject to change! D-76437 Rastatt Tel. +49 (7222) 784-2396 www.siemens.com...

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