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

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HMI Bypass Controller Installation and Commissioning Guide 31
3.2.10.1 Serial Data Format
Defines how the serial data packets are formatted. Stop bits, parity, and
standard/modified address schemes.
3.2.11 Alarm Response
The Alarm Response screen allows for the configuration of the Automatic
Bypass and Damper Fault Response features.
Automatic Bypass : When enabled, the system will automatically go
into Bypass Mode after a fault is detected and after “Auto-Bypass Time”
has elapsed.
Auto-Bypass Time : This is the delay between the VFD fault detection
and closing the bypass contactor.
Damper Fault Response : When enabled, a damper feedback signal will
be required to run the motor. If no signal is detected after the “Damper
Timeout” window has elapsed, a Damper Timeout fault will be triggered.
Damper Timeout : The window of time during which the bypass system will
wait for a damper feedback signal. If this time has elapsed and no damper
feedback is detected, a damper timeout fault is triggered.
Damper Motor On Delay: The time delay between when a motor run signal
is received (VFD or Bypass) and when the motor starts. This time is typically
adjusted to allow for damper operation.