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JKSSS+ Series
Proble m
CPU LCD Displa y
Phase Loss
PHASE LOSS
Overload
OVERLOAD TRIP
Stall prevention
ACCEL TIME TRIP
Under Voltage
UNDER VOLTAGE TRIP
Trip
Under Current
UNDER CURRENT TRIP
Trip
Self-test Failure
SELF-TEST FAILURE
Line Frequency
OVER OR UNDER
Trip
FREQUENCY TRIP
GROUND FAULT
Any Ground
HI-SET OR LO-SET
Fault Trip
Motor stopped
Check for fault indication
during run
Control circuit
fuses b low after
control power is
applied.
LED
Trip
Trip
Trip
Trip
Trip
Trip
Trip
Trip
Trip
None
None
Aux
Possible Ca use
Re la y
Los s of 1 or m ore
phas es of power from
AUX1
utility or generated power
Blown power fus es
Im proper program m ing
AUX1
Pos s ible load dam age or
jam m ed load
Im proper s etting for
m otor load condition
AUX1
Dam aged load
Im proper program m ing Check s etpoint s ettings
Wrong pos ition of
dis connected breaker
AUX1
Main contactor failed to
clos e
Trans form er too s m all
Im proper program m ing Check s etpoint s ettings
AUX1
Unloaded m otor
Failed CPU or Main Firing
Board
AUX1
Vibration
Generator Power
AUX1
Problem or grid change
Im proper program m ing Check program s etpoints
Any wire going to ground
(I.e. s tator ground, m otor
AUX1
ground, s oft s tart ground)
High vibration or loos e
connections
W arning: This is a s erious fault condition. Ens ure that the fault
condition is cleared on the load before attem pting to res tart the
m otor.
AUX1
Load s horted/ grounded/
faulted
Faulty m ain circuit board Replace the m ain circuit board
Short in control circuit
None
Wrong control voltage
2.3 - 4.2KV
Solutions
Check power s ource
Check for s hort circuits
Check m otor nam eplate vers us
program m ed param eters
Check m otor currents
Verify current lim it s etting
Check for load failure
Check dis connect or open breaker
Check internal connections
Reduce current lim it s etting, s aturation
or s agging power s upply trans form er
Check load
Contact factory
Check internal wiring connections
Troubles hoot and repair generator
Contact utilities com pany
Main board failure
Three phas e power rem oved from
Main Board
Check with m egger or Hi-pot m otor
leads and m otor
Check internal connections
Rem ove power and repair.
Rem ove power, locate and rem ove
this s hort
Apply the correct voltage to the control
circuit
JKSSS+ Series - 81
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