Automationdirect.com Stellar SR44, User Manual

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C–3
Technical Hints (continued)
Category: Troubleshooting
Category: Wiring
No:
1
Subject:
When Replacing Star-Delta (Wye-Delta) Starters
If you are planning to re-use the existing overload and contactor, ensure that they are sized for the full motor line
current; not just for delta-phase current.
No: 9 Subject: "Too Hot"
Check ventilation into the cabinet. If the unit has worked for a long time, check fans and airflow through unit.
No:
8
Subject:
Commissioning 2
If the Soft-Start trips on overload during the start, check that the starter is large enough for the load.
No:
7
Subject:
Cancelled 1
If trying to change from Keypad to Remote Starting with a start signal present, the display flashes "cancelled".
No: 6 Subject: No Current Display
If the motor current drops below 12.5% I
e
while running in "Phase Loss only" or "Start & Bypass", then no value is
displayed.
No:
5
Subject:
Keypad Displays “2 Comms Failure”
Check that the unit has its original front cover and keypad.
No:
4
Subject:
Stopped Cooling
This message is displayed during the cooling time (pnu116), and is the period allowed for the unit to cool before a
restart.
No: 3 Subject: Intermittent "7 Sensing Signal" Trip
Normally caused by a noisy site. First try increasing the optimize rate; secondly increase trip sensitivity.
No:
2
Subject:
Load (1)
The Soft-Starter will trip (8) if a start is attempted with no motor connected on the output.
No: 1 Subject: Reset Trip
Trips can be reset by pressing the ‘#’ key on the keypad,
or by changing the Start/Stop I/p to ‘Start’ if control is set to remote.
No: 2 Subject: Running Inside the Delta 1
The unit must be set to Firing Mode 1. The current displayed is now the phase current (58% of the line current).
No:
3
Subject:
Running Inside the Delta 2
When running with Firing Mode 1, the maximum cable length between starter and motor is reduced to 50M.
No:
4
Subject:
Running Inside the Delta 3
An in-line contactor must be used when running in the Delta.
Appendix C: Technical Hints
SR44 Series Soft Starter User Manual
1st Ed, Rev B 07/31/2019