Chapter 6 - Alarm & Faults; Electronic Bypass Keypad Alarms And Faults - Emerson FPCSK Instruction Manual

Chapter 6 - Alarm & Faults
There are two different locations a fault or alarm will be displayed:
1 The Electronic bypass keypad
2 The VFD keypad

6.1 Electronic Bypass Keypad Alarms and Faults

There are four (4) Alarm LEDs on the Electronic bypass keypad indicating the
faults that may occur. They are as follows;
1. Motor Overload: Indicates that the manual motor overload relay has
tripped.
Check that overload relay is properly set for motors full load
ampere rating. Check for excessive motor current and load.
2. Safety: Indicates that an external safety interlock is in the open position.
If a safety input is not used, check the bypass terminal block for a jumper
between terminals TB2-3 and TB2-8. If a safety input is used, verify that the
Safety contact is closed.
3. Fire Alarm: Indicates that a Fire condition exists.
If fire alarm is set for purge mode, the VFD package will operate the motor
at full speed. Note: In purge mode all external safeties and motor overloads
are disabled. The unit will "run to destruction" in this mode.
If fire alarm is set for stop mode, the VFD package will disable the motor and
prevent it from being operated in either VFD or bypass mode.
4. VFD Fault: Indicates that the VFD has had a fault
The VFD fault code will be displayed on the VFD keypad.
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