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GE SPEEDTRONIC Mark V Troubleshooting Chart

Annunciator for gas turbine

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SPEEDTRONIC Mark V Annunciator Troubleshooting Chart
This alarm list doesn't purport to cover all details, nor to provide for every possible
contingency to be met during operation
Customer – Specific Alarms in <C> and <RST>
DROP
SIGNAL NAME
0
L30DIAG_C
001
L30FORCED
002
LWLX4MIN
003
LWLXHR
004
L30TXA_C
005
L86TXT_C
064
L30DIAG_Q
065
L43DIAG_ALM
These instructions do not purport to cover all details or variations in equipment nor to provide for every possible
contingency to be met in connection with installation, operation or maintenance. Should further information be desired or
should particular problems arise which are not covered sufficiently for the purchaser's purposes the matter should be
referred to the GE Company.
Description
Diagnostic Alarm <C>
The microprocessor self—
checking program has un-
covered a control panel
problem.
Forced Logic Signal De-
tected
Injection to Fuel Ratio
Steam (water) injection
Low—Four Minute Aver-
flow four minute average
age
low.
Injection to Fuel Ratio
Steam (water) injection
Low—Hourly Average
flow one hour average
low.
Exhaust Temperature High
High median exhaust tem-
<C>
perature calculated in
<C>.
Exhaust Over temperature
Turbine has tripped due to
Trip <C>
high median exhaust tem-
perature.
Diagnostic Alarm <Q>
The microprocessor self—
checking program has un-
covered a control panel
problem.
Off—Line Diagnostics
Off—line diagnostic op-
Running
eration has been selected.
GE Power Systems
Gas Turbine
Cause
Call up diagnostic display.
Check steam (water) injection system.
Check steam (water) injection system.
Lower load to reduce exhaust temperature.
Investigate.
Investigate.
Call up diagnostic display.
Do not start unit until diagnostics are com-
plete.
1998 GENERAL ELECTRIC COMPANY
Alarm 1
April 1998
ACTION

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Summary of Contents for GE SPEEDTRONIC Mark V

  • Page 1 April 1998 GE Power Systems Gas Turbine SPEEDTRONIC Mark V Annunciator Troubleshooting Chart This alarm list doesn’t purport to cover all details, nor to provide for every possible contingency to be met during operation Customer – Specific Alarms in <C> and <RST>...
  • Page 2 Alarm 1 SPEEDTRONIC Mark V Annunciator Troubleshooting Chart L43MAINT Maintenance — Forcing Auto calibrate, memory When done with the operation, deselect the Mode Enable changing or logic forcing operation. mode of operation has been selected. L5E_ALM Manual Trip The emergency stop push–...
  • Page 3 System Description Gas Turbine L12LF_P Protective Speed Signal LP speed pickup voting Check and recalibrate LP speed pickups. Trouble — LP mismatch in <P>. L83LOST Overspeed Test Mode Se- LP overspeed trip being See ”Overspeed Trip Checks” section of lected — LP checked.
  • Page 4 Alarm 1 SPEEDTRONIC Mark V Annunciator Troubleshooting Chart L2SFT Startup Fuel Flow Exces- Excessive fuel for startup Check the servo and feedback signals for sive Trip has been detected. For gas proper operation. fuel the gas control valve is open too far.
  • Page 5 System Description Gas Turbine L26QN_ALM Lube Oil Tank Temperature Lube tank temperature be- Check for proper operation of the lube oil low recommended limits tank heaters. Starting is inhibited if the tank (see piping schematic). temperature is low. L26QA_ALM Lube Oil Header Temp Lube header temperature Check for proper operation of the lube oil High...
  • Page 6 Alarm 1 SPEEDTRONIC Mark V Annunciator Troubleshooting Chart L3SMT Starting Device Trip The turbine has been Note where in the start sequence the turbine tripped because the start- tripped to aid in determining cause of trip. ing device has failed to Check the suspect system.
  • Page 7 System Description Gas Turbine L52FC_ALM Cooling Fan Motor Breaker Cooling fan motor did not Check cooling fan motor module in PECC. Open start. L4IGVT Inlet Guide Vane Control IGV control system prob- Check IGV control system. Trouble Trip lem. L86GVA Inlet Guide Vane Control IGV control system prob- Check IGV control system.
  • Page 8 Alarm 1 SPEEDTRONIC Mark V Annunciator Troubleshooting Chart L86TXT Exhaust Overtemperature The temperature control Isolate problem and correct. Trip system has not limited ex- haust temperature within the trip limits. L86TFB Exhaust Thermocouples Excessive number of ther- Check and reconnect thermocouples.
  • Page 9 System Description Gas Turbine L3LFLT Liquid Fuel Control Fault Liquid fuel checking sys- Determine abnormal condition by reading tem has detected an abnor- signals (L3LFLT1 to L3LFLT5). mal servo or LVDT posi- tion or signal. L33FL_ALM Liquid Fuel Stop Valve Valve or control failure.
  • Page 10 Alarm 1 SPEEDTRONIC Mark V Annunciator Troubleshooting Chart L86S Auto Synchronizing Auto synchronizing self— Investigate synchronization system to deter- Lockout checking system has de- mine exact cause of problem. tected a synchronizing equipment abnormality. L27BN_ALM Bus Undervoltage – Bus synchronizing poten- Check bus PT fuses and wiring.
  • Page 11 System Description Gas Turbine L63CA3L_ALM Gen Air Filter Cleaner Generator air inlet filter Check air inlet filter cleaning components. Pressure Low cleaning system problems. L63GFH_ALM Generator Air Filter High High pressure differential Inspect and clean/change filter elements, as Pressure Drop across generator air inlet required.
  • Page 12 Alarm 1 SPEEDTRONIC Mark V Annunciator Troubleshooting Chart L94H_ALM Generator Hydrogen Purge Shutdown initiated due to Check hydrogen cabinet for undervoltage. Shutdown one or more hydrogen sys- Check hydrogen control switch in mainte- tem problems, e.g., hydro- nance/auto. Check and restore hydrogen pu- gen purity has fallen to rity.
  • Page 13 System Description Gas Turbine L30RHFLTX Relative Humidity Sensor Humidity sensor failure. Check sensor and wiring. Fault L26JS2H_ALM Water Skid Enclosure Tem- Failure of exhaust fan. Check exhaust fan/motor components for perature High proper operation. L26WR2L_ALM Water Skid Enclosure Tem- Failure of heaters. Check heater and blower for proper opera- perature Low tion.
  • Page 14 Alarm 1 SPEEDTRONIC Mark V Annunciator Troubleshooting Chart L60ATHA Steam Augmentation — High steam temperature. Reduce steam temperature. High Temperature L60ATLT_ALM Steam Augmentation — Steam augmentation sys- Correct problem before restarting steam Low Temp. Trip tem tripped due to low augmentation.
  • Page 15 System Description Gas Turbine R5E_ALM Remote Emergency Trip Unit was tripped with the Investigate and correct cause of trip. Manu- remote emergency trip ally reset pushbutton. pushbutton. L90TKL Exhaust Frame Cooling Exhaust frame cooling Investigate exhaust frame cooling system. System Trouble — Unload fans 88TK—1,2 problem or system problem.
  • Page 16 Alarm 1 SPEEDTRONIC Mark V Annunciator Troubleshooting Chart L12L_ACC_AL Protection Module Accel- eration Trip LP L12LF Control Speed Signal LP speed pickup voting Check and recalibrate LP speed pickups. Trouble — LP mismatch. L12LBLT_ALM Overspeed Bolt Trip LP L86LOT Lube Oil HighTemp. Trip...
  • Page 17 System Description Gas Turbine L3GTVFLT Gas Transfer Valve Posi- tion Trouble L3GCVSFLT Secondary Gas Control VLV Servo Trouble L3GPVFLT Gas Premix/Trim Valve Servo Trouble L86GPVA Gas Premix/ Trim Not Tracking–Alarm L86GPVT Gas Premix/Trim Not Tracking –Trip L3GCVQFLT Quatenary Gas Control VLV Servp Trouble L39VTF Accelerometer Fault...
  • Page 18 Alarm 1 SPEEDTRONIC Mark V Annunciator Troubleshooting Chart L40EX_A_ALM EX2K Loss Of Excitation Loss Of Current To Field Trouble Shoot Master 1 Core Automatically Transfer To The Hot Backup Core L40EX_Y_ALM EX2k Loss Of Excitation Excitation Exceeded The Go To Gen/EX2K Control Screen, Check Trip Low Level Setpoint.
  • Page 19 System Description Gas Turbine L74A_ALM Excessive Volts Per Hertz Ratio Between V/HZ In- Lower The ExcitationGo To Gen/EX2K correct Control Screen, Check Fault Code , Click On Fault Code HelpAlso Check GEH6121 Pg.8–10 L74B_ALM Negative Sequencing Cur- Unbalance Stator Cur- Check The MMI Operation rent rent.Unbalance...
  • Page 20 Alarm 1 SPEEDTRONIC Mark V Annunciator Troubleshooting Chart L4_FB_ALM TCEA 4 Relay Circuit External (customer) trip. Check switch, wiring and activating param- FDBK (Extrnl Trip) A switch input wired to eters of switch. the control panel trips the turbine, when activated.
  • Page 21 System Description Gas Turbine L33GCL_ALM Load Compartment CO2 Fire protection system ac- Reset vent doors and latches. Door Closed tivation closes all compartment ventilation discharge vents. CO2 dis- charge pressure releases a door latch. L33GCG_ALM Generator CO2 Door Fire protection system ac- Reset vent doors and latches.
  • Page 22 Alarm 1 SPEEDTRONIC Mark V Annunciator Troubleshooting Chart L37GJA Generator Breaker Cooling Problem With One Of The Investigate Fan Control Circuits Fan On Backup Fans L37GJF Generator Breaker Cooling Problem with Both Cool- Reduce Gen enerator Out Put To The Max...
  • Page 23 Starting Motor Protection Timed Overcurrent Or In- Check The Starting Motor Protection Alarm rush Current To High Module Faults Codes Etc. L30BN_F_ALM Bently Nevada Monitor Increased Vibrations Check Shaft Vibrations Fault Check Bently Nevada Monitor System Check GE Vibration Probes...
  • Page 24 Alarm 1 SPEEDTRONIC Mark V Annunciator Troubleshooting Chart L39VS_A_ALM Bently Nevada Monitor Increased Vibrations Check Shaft Vibrations Alarm Check Bently Nevada Monitor System Check GE Vibration Probes L39VS_D_ALM Bently Nevada Monitor Increased Vibrations Check Shaft Vibrations Danger Check Bently Nevada Monitor System...