Emerson Unidrive M400 - Page 3

Electronic Bypass Controller Installation and Commissioning Guide 3
Section 4 – Overview of the electronic bypass ................................................. 22
4.1 Control Board .............................................................................................22
4.2 Electronic Bypass Keypad Function Summary .............................................22
Electronic Bypass Control Functions ............................................................23
4.3 Using the Electronic Bypass Conguration Switches ...................................24
4.4 Using the Additional Customer Inputs ........................................................25
4.5 Motor Overload ..........................................................................................26
4.6 Failure and Power Off Conditions ................................................................26
4.7 Control Modes of the Electronic Bypass ......................................................26
4.7.1 TEST mode .........................................................................................26
4.7.2 VFD mode ..........................................................................................27
4.7.3 Bypass Mode ......................................................................................27
4.7.4 Hand Mode ........................................................................................27
4.7.5 Auto Mode .........................................................................................28
4.8 Bypass Modes of the Electronic Bypass .......................................................28
4.8.1 MANUAL Bypass ..................................................................................28
4.8.2 Automatic Bypass on VFD Fault ..........................................................29
4.8.3 Emergency Bypass .............................................................................29
Section 5 - Programming ................................................................................ 30
5.1 Required Programming ..............................................................................30
5.2 Recommended Programming ....................................................................31
Section 6 - Alarm & Faults ................................................................................ 32
6.1 Electronic Bypass Keypad Alarms and Faults ...............................................32
Section 7 - Additional Information ................................................................... 34
7.1 Specications – Electronic Bypass ...............................................................34
7.2 Maintenance & Inspection ..........................................................................35
7.3 Start-up Checklist – Electronic Bypass .........................................................36
7.4 Startup Checklist – VFD ..............................................................................37
7.5 Startup for Cooling Tower - Fan and/or Pump Applications ..........................38