
Alarm 1 SPEEDTRONICMark V Annunciator Troubleshooting Chart
10
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187
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L86S
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
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Auto Synchronizing
Lockout
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Auto synchronizing self—
checking system has de-
tected a synchronizing
equipment abnormality.
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ÁÁÁÁÁÁÁÁÁÁ
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Investigate synchronization system to deter-
mine exact cause of problem.
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188
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L27BN_ALM
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Bus Undervoltage –
No Auto Synch
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Bus synchronizing poten-
tial not available.
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Check bus PT fuses and wiring. Do not use
auto synchronizing or manual synchroniz-
ing until problem is resolved.
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189
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L3Z
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Failure to Synchronize
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Unit did not synchronize
and close generator break-
er within the normal ex-
pected time (15 seconds).
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Check all signals going making up the L4
logic signal to determine which caused the
problem or determine the cause of lack of
flame establishment.
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190
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L94EK
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Exciter Rect Cooling
Trouble — Trip 52G
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Breaker has tripped and
machine is at FSNL be-
cause of problem with ex-
citer rectifier cooling.
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Investigate exciter rectifier cooling system.
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191
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L30EK
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Prim Exciter Rect Cooling
Fan Trouble
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Problem with primary ex-
citer rectifier cooling fan.
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Determine and correct problem with prima-
ry exciter rectifier cooling fan.
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192
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L30EKR
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Stby Exciter Rect Cooling
Fan Running
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Problem with primary ex-
citer rectifier cooling fan.
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Determine and correct problem with prima-
ry exciter rectifier cooling fan.
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193
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L26SFH_ALM
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Exciter Rectifier Bridge
Temp High
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Possible cooling system
problem.
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Check exciter rectifier cooling system.
194
L59E_ALM
Exciter Overvoltage
Excessive field volts have
been detected.
Check exciter.
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195
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L49GH_ALM
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Generator Stator Temp
High
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Generator stator tempera-
ture is excessive caused by
lack of cooling or over-
load.
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ÁÁÁÁÁÁÁÁÁÁ
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The generator should not be operated when
the stator temperature is excessive. Check
cooling system, reduce overload on genera-
tor.
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196
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L86TGT_ALM
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Generator Differential Trip
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A generator panel protec-
tive device has tripped the
86G lockout relay.
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Determine which protective device tripped
the 86G and correct the abnormality that
precipitated the trip.
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197
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L52G_ALM
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Generator Breaker Tripped
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Generator breaker has
been tripped by an auto-
matic protective device or
manually.
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ÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁ
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Determine device that tripped the breaker.
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198
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L64F_ALM
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Generator Field Ground
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A ground on the generator
field has been detected.
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ÁÁÁÁÁÁÁÁÁÁ
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Operation of the generator with the field
grounded is not recommended as a second
ground could result in excessive damage to
the generator field.
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199
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L71WG_ALM
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Liquid Detected in Genera-
tor
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Excessive liquid in bottom
of generator.
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Remove liquid and take corrective action to
prevent recurrence of problem.
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200
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L63BQL_ALM
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Generator Bearing Vacuum
Low
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Generator bearings are
sealed by vacuum. This
alarm indicates a potential
problem with the sealing
system.
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Investigate generator bearing sealing sys-
tem.