36 IOMM Starter
Faulted Condition
When a fault condition exists, the display shows the fault code Fxx. The exceptions to this
are as follows:
• When the fault is thermal overload trip, “F OL” will be displayed.
• When the fault is Instantaneous over current, ioc will be displayed.
Quick Meters
Although any meter may be viewed by changing the meter parameter, there are 3 “Quick
Meters” that are always available with a single key press. When the starter is in the normal
display mode, the display may be toggled between the information currently displayed and
the following quick meters.
Status Meter Toggle between the programmed meter display and the starter operational
status display (rdY, run, utS, dcL, etc) by pressing the ENTER key
.
Overload Meter Toggle between the programmed meter display and the overload content
by pressing the DOWN key. The overload will be displayed as “oXXX”
where XXX is the overload content. For example if the overload content
is 76 percent, it will be displayed as “o 76”.
Phase Order Meter Toggle between the programmed meter display and the phase order by
pressing the UP key. The phase order will be displayed as “AbC” or
“CbA”. The phase order must be AbC to operate.
Restoring Factory Parameter Settings
To restore ALL parameters to the factory default settings, press and hold the PARAM and
ENTER pushbutton switch on power up. The display will blink “dFLt”. Parameters unique
to the motor starter applications will need to be set again to appropriate values before motor
operation
Resetting a Fault
To reset from a fault condition, press RESET.
Emergency Thermal Reset
To perform an emergency thermal reset, press RESET and DOWN. This will set the motor
thermal overload content to 0.
Wye Delta
When the D3 control is provided for Wye-Delta – there is Wye-Delta specific software and
the D3 control is configured to operate an electromechanical closed transition Wye-Delta
(Star-Delta) starter. When equipped with Wye-Delta software, all D3 motor and starter
protective functions, except bad SCR detection and power stack overload, are available to
provide full motor and starter protection. There is an additional specific parameter for
Transition Time. This sets the time when the Wye to Delta transition occurs during starting.
A closed transition starter uses resistors that are inserted during the transition so that the
motor is never completely disconnected from the input line.
The presence of these resistors in a closed transition starter smoothes the transition from Wye
to Delta operation mode. A typical closed transition Wye-Delta starter schematic is shown in
Figure 10, Wye Delta Motor Connection to the D3 Control.
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