Siemens Combustion Burn Controls LME7 Fault Codes

Siemens Burn Controls LME7 has an extensive list of fault codes to help clarify the nature of any fault. you can check the below list for reference.

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Complete Fault Code List

Fault Code Description of the Fault Corrective Action
2 No flame at start-up A flame failure occurred during lightoff.
1.     Check the wiring of the ignition transformer, pilot valve, and main valve(s).
2.     Ensure manual shutoff valves on the pilot gas line and main gas line are open.
3.     Check the fuel / air ratio at lightoff.
4.     Check the flame detector signal in the presence of a known flame source. Replace the flame detector if it does not produce the anticipated signal.
3 Air pressure switch open The air pressure switch connected to terminal X3-02.1 is open, causing a fault. Ensure the setpoint of the switch is set to an appropriate value. Check the wiring of the air pressure switch. If no air pressure switch is being used, place a jumper from terminal X2-01.3 to X3-02.1.
4 Extraneous light An extraneous light (flame signal present when there should be none) fault occurred.
1.     Ensure that the source of light is not a flame. If it is, take corrective action immediately.
2.     Ambient light can cause an extraneous light fault. Ensure the flame scanner is viewing a dark area.
3.     UV scanners typically fail on, giving a false flame signal. Remove UV scanner and cover the bulb to ensure it is not seeing any light. Look inside the bulb and see if any purple arcs of electricity are occurring between the electrodes in the bulb. If there are, replace the UV scanner.
5 Air pressure switch closed The air pressure switch connected to terminal X3-02.1 is closed before the blower output is energized in phase 22, causing a fault. Ensure the setpoint of the switch is set to an appropriate value. Check the wiring of the air pressure switch. If no air pressure switch is being used, place a jumper from terminal X2-01.3 to X3-02.1.
6 Actuator position fault The required position feedback from the connected SQM… actuator was not received.
1.     Ensure the potentiometer on the SQM… actuator is wired correctly.
-For counter-clockwise actuators (SQM40…, SQM50…), terminal "c" on the potentiometer should be wired to terminal X66.1 on the LME7, and terminal "a" on the potentiometer should be wired to terminal X66.3 on the LME7.
-For clockwise actuators (SQM41…, SQM50…R), terminal "a" on the potentiometer should be wired to terminal X66.1 on the LME7, and terminal "c" on the potentiometer should be wired to terminal X66.3 on the LME7.
2.     Ensure the SQM… actuator is wired properly to the LME7, especially the position feedback on terminal X2-09.4 of the LME7.
3.     Ensure no mechanical stops are preventing the actuator from reaching its expected position.
4.     While not common, heavy vibration on the actuator can wear a track in the position feedback potentiometer. If the fault always occurs at the same actuator position, the actuator may need to be replaced, and the vibration needs to be reduced to avoid having a similar issue with the new actuator.
Fault Code Description of the Fault Corrective Action
7 Loss of flame A flame failure occurred during normal operation.
1.     Check the fuel / air ratio.
2.     Check the flame detector signal in the presence of a known flame source. Replace the flame detector if it does not produce the anticipated signal.
10 Wiring or other error This fault is a catchall and can be caused by a variety of issues. See Section 7-3 for a list of all known causes of this fault. If none of the causes listed in Section 7-3 appears to be the cause, review all wiring on the LME7 and check to see if a wire is landed on an incorrect terminal.
12 Fuel valve V2 leaking (PME73.840A1) Fuel valve V1 leaking (all other PME7s) On PME73.840A1, the downstream gas valve V2 failed valve proving. On all other PME7 program modules, the upstream gas valve V1 failed valve proving.
1.     Bubble test the gas valve to ensure the valve is not leaking. If the valve is leaking, replace the valve.
2.     Ensure that the setpoint of the valve proving pressure switch is set to 50% of the inlet pressure to the upstream gas valve.
13 Fuel valve V1 leaking (PME73.840A1) Fuel valve V2 leaking (all other PME7s) On PME73.840A1, the upstream gas valve V1 failed valve proving. On all other PME7 program modules, the downstream gas valve V2 failed valve proving.
1.     Bubble test the gas valve to ensure the valve is not leaking. If the valve is leaking, replace the valve.
2.     Ensure that the setpoint of the valve proving pressure switch is set to 50% of the inlet pressure to the upstream gas valve.
14 Proof-of-closure (POC) switch failure 1.     Bubble test the gas valve to ensure the valve is not leaking. If the valve is leaking, replace the valve.
2.     Ensure that the setpoint of the valve proving pressure switch is set to 50% of the inlet pressure to the upstream gas valve.
If no POC switch exists, either set parameter 237 to 0 or install a jumper between terminals X2-02.3 and X2-02.4.
20 Gas pressure fault One of the gas pressure switches wired to terminal X5-01.2 opened, causing a fault. It is common for both the high and low gas pressure switches to be wired to terminal X5-01.2, so the fault could be either a high gas or low gas event. Check the gas supply and open any manual shutoff valves. Check the wiring of all gas pressure switches. Check the setpoint of any gas pressure switches to ensure the setpoint is set to an appropriate value.
21 High gas pressure fault The high gas pressure switch wired to terminal X2-02.4 (PME75.811A1) or X9-04.2 (PME75.812A1) opened, causing a fault. Check the wiring of the high gas pressure switch. Check the setpoint of the high gas pressure switch and ensure it is set to an appropriate value. Check pressure regulators for ruptured diaphragms or incorrect setpoints.
Fault Code Description of the Fault Corrective Action
22 Safety loop open Check all of the switches wired into the safety loop on terminal X3-04.1. One of the switches opened, causing the fault. Fix the condition that caused the switch to open and reset the fault.
60 Analog input out of range The 4-20 mA input connected to terminal X65 is out of range. This input determines the position of the actuator or speed of the PWM blower. Check the wiring of the analog input. If a fault is not desired when the input drops below 4 mA, set parameter 654 to a 5.
83 PWM blower speed fault The speed of the PWM blower does not match the expected speed. More specifically, the blower speed fell outside of tolerance band 1 (parameter 650.00) for a time longer than the maximum speed deviation allowed (parameter 660), or the blower speed fell outside of tolerance band 2 (parameter 650.01). There are many possible corrective actions:
1.     Increase ramp time up (parameter 522) and/or ramp time down (parameter 523) to allow the blower more time to achieve the expected speed.
2.     Increase the setting of tolerance band 1 (parameter 650.00) and/or tolerance band 2 (parameter 650.01).
3.     Ensure that the maximum fan speed (parameter 519) and the number of pulses per revolution (parameter 644) are set correctly for the blower being used.
4.     Inspect wiring from PWM blower to LME7 to ensure the tachometer speed feedback signal is wired correctly.
138 Restore process successful There is no fault. This fault occurs when a parameter set was successfully restored from the PME7 program module to the LME7 base unit. Reset the fault.
139 No program module detected This fault occurs when no PME7 program module is plugged into the LME7 base unit. Insert a PME7 program module into the LME7 base unit and reset the fault.
167 Manual lockout A manual lockout is caused by pressing the info button and any other button, either on the LME7 base unit or on the AZL23 remote display. Reset the fault.
206 Inadmissible combination of units (LME7 / AZL23) Reset the LME7. If the fault occurs continuously, replace the LME7 and / or AZL23.
225 PWM blower speed fault The speed of the PWM blower dropped below the minimum prepurge speed (parameter 675.00) during prepurge, or the speed of the PWM blower exceeded the maximum ignition speed (parameter 675.01) during ignition. Adjust parameter 675.00 or 675.01, or adjust purge speed (503.01) or ignition speed (403.00).
226 PWM blower parameterization error The following parameter settings are not allowed. Correct the parameter setting that is incorrect and reset the fault.
1.     Speed low-fire (P1) > speed high-fire (P2)
2.     Speed low-fire (P0) = 0
3.     Maximum blower speed (parameter 519) = 0
Fault Code Description of the Fault Corrective Action
227 PWM blower parameterization error One or more PWM blower settings are not compatible. Make sure the following three conditions on the minimum and maximum speed settings are met.
1. 516.00 ≤ P0 ≤ 516.01
2. 517.00 ≤ P1 ≤ 517.01
3. 518.00 ≤ P2 ≤ 518.01
rSt Er1 Incompatible PME7 and LME7 The PME7 program module and LME7 base unit being used are incompatible. PME71 program modules are only compatible with LME71 base units, PME73 program modules are only compatible with LME73 base units, and PME75 program modules are only compatible with LME75 base units.
rSt Er2
rSt Er3 Fault during restore process The PME7 program module was removed during the restore process. Re-install the PME7 program module and reset the fault to complete the restore process.
bAC Er3 Fault during backup process The PME7 program module was removed during the backup process. Re-install the PME7 program module and reset the fault. Perform the backup process again.
Err PrC No program module detected This fault occurs when no PME7 program module is plugged into the LME7 base unit. Insert a PME7 program module into the LME7 base unit and reset the fault.

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