S&C Instruction Sheet 1023-550 19
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
This field displays “Active” when the actual change in voltage levels during
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
is below the m in imu m percentage of the ex pected cha nge. The
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 with neutral-current/neutral-voltage sensing, this field 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.
Error Conditions
