Nidec Control Techniques HVAC Drive H300 HMI Bypass, Installation And Commissioning Manual

Page: 43 / 56

HMI Bypass Controller Installation and Commissioning Guide 43
Press the HAND icon on the HMI bypass touchscreen. The HAND icon will
be highlighted indicating the HMI bypass is in local control. This will start
the motor across the line. Check motor rotation.
To stop the motor press STOP on the HMI touchscreen.
Note the direction of rotation as the motor shaft begins to rotate as
compared to the required rotation direction.
Motor Rotation Correction
VFD Correct Correct Incorrect Incorrect
Bypass Correct Incorrect Correct Incorrect
Action No Action Change any
two power
leads at input
disconnect
Change any two leads
at input disconnect, and
change any two leads at
the output of the motor
overload Change any
two leads
at output of
motor overload
4.4 Normal Operation
There are two (2) buttons used to select the modes of operation available:
1. VFD (VFD Mode) – Energizes the VFD output contactor
2. BYP (Bypass Mode) – Allows bypass operation
Stop (reset) Button
The STOP button section will stop motor operation in either the VFD or
Bypass modes. This button will also reset any faults indicated by the system.
4.4.1 Current System Status
The One-line diagram on the main screen will indicate if the motor is being
run by the VFD or across the line (bypass) by highlighting the active control
in green. The VFD or the BYP icon will highlighted green and the One-line
diagram will indicate the motor status.