Error Conditions - S&C IntelliCap Plus Troubleshooting Manual

Error Conditions

Using IntelliLink Software to Locate Problems
Incorrect Voltage Range
This field displays "Active" when the voltage is not within ±15% of the nominal voltage. Make
sure the Nominal Operating Voltage setpoint (on Page 3 of the Setup>General screen)
is set correctly.
Low Switching Volt Delta
Th is f ield d isplays "Active" when the actua l cha nge in voltage levels du r ing
switching is below the minimum percentage of the expected change. The Minimum
Percentage of Average Delta Voltage setpoint is on Page 2 of the Setup>General screen.
See Instruction Sheet 1023-530, "S&C IntelliCap® Plus Automatic Capacitor Control: Setup,"
for more information.
Low Switching Var Delta (var controls only)
This field displays "Active" when the actual change in kvar levels during switching
i s below t he m i n i mu m percent a ge of t he ex pec t ed ch a nge. T he M i n i mu m
Percentage of Average Delta kvars setpoint is on Page 2 of the Setup>General screen.
See Instruction Sheet 1023-530, "S&C IntelliCap® Plus Automatic Capacitor Control: Setup,"
for more information.
Zero Neutral Sensor (neutral current/neutral voltage controls only)
For controls with neutral current sensing, this field displays "Active" when the
control detects zero neutral current for the duration of the Zero Neutral-Current
Detection setpoint.
For controls with neutral voltage sensing, this field displays "Active" when the
control detects zero neutral voltage for the duration of the Zero Neutral-Voltage
Detection setpoint.
Neutral Sensor (neutral current/neutral voltage controls only)
For controls w ith neutra l- cur rent /neutra l-voltage sensing, this f ield displays
"Active" when the neutral current/neutral voltage is above the alarm level for the
duration of the applicable Neutral Change-Time Threshold setpoint.
The Neutral Sensor alarm clears automatically if the problem is corrected before a
retry is performed, after a successful retry, or by placing the control into Manual mode.
The Neutral Sensor trouble condition is active during a Retry-Time Delay period.
The control records the date and time switch and sensor malfunctions last occurred and
were cleared. An error condition requires prompt attention.
Voltage Sensor
This field displays "Active" when there is a problem with the voltage sensor or when the
sensor readings are outside the valid operating range (± 20% of the nominal voltage).
Temperature Sensor
This field displays "Active" when there is a problem with the temperature sensor or when
the sensor readings are outside the valid operating range (-40°F to approximately 150°F,
or -40°C to 66°C).
Note: A bad temperature sensor does not prevent the control from operating.
When the control is in Temperature or Time-Biased Temperature strategy, it reverts to
Temperature Sensor Error, Voltage Only strategy, and will switch the bank if a voltage-
override condition becomes active.
Load Fuse
This field displays "Active" when the fuse mounted on the faceplate is blown.
This indicates a problem with the wiring to the capacitor switches or with the
capacitor switches themselves.
Neutral Sensor Lockout
This field displays "Active" when there is a neutral current or neutral voltage alarm that the
control could not clear. The bank remains locked out until the alarm is reset.
S&C Instruction Sheet 1023-550 19