Electronic Bypass Option Overview
Pushbutton/Indicator Description
STOP
RESET
VFD0102R1
Opens the output and bypass contactors, disconnecting the motor.
VFD Fault
Safety Fault
Overload Fault
VFD0103R1
When a VFD Fault is indicated, the VFD Fault indicator lights and the
VFD Fault Relay output on the Controller Board is triggered.
VFD Fault
Safety Fault
Overload Fault
VFD0104R1
The Safety Fault indicator lights when either of the Remote Safety inputs
on the Controller board opens. The motor is prohibited from operating in
either the VFD or bypass modes while either of these contacts is open.
EXCEPTION: Essential Services ignores a Safety Fault.
NOTE: If not using the Remote Safety feature, hard wire the two
Remote Safety inputs.
VFD Fault
Safety Fault
Overload Fault
VFD0105R1
If the Electronic Bypass Option current overload relay trips, the Overload
Fault indicator lights and the motor will not run in bypass mode.
Auto Bypass Enabled
Essential Services
VFD0106R1
When the Auto Bypass DIP switch is enabled, the Auto Bypass Enabled
indicator is on steady. Bypass operation is automatically initiated by the
SED2.
When Auto Bypass is active, the Auto Bypass Enabled indicator flashes.
Auto Bypass Enabled
Essential Services
VFD0107R1
When the Essential Services DIP switch is enabled, the Essential
Services indicator is on steady.
When the Essential Services input is open, normal operation is indicated
as the output contactor remains closed to keep the motor running and the
Essential Services indicator is on steady.
When the Essential Services input is closed, the bypass contactor closes
and the Essential Services indicator flashes.
NOTE: Nothing can interrupt the Essential Services mode
except for the Essential Services input opening.
INTERLOCK START LOGIC
Enable Commanded Proofed
VFD0108R1
When the Interlock DIP switch is enabled, the Interlock Start Logic Enable
indicator is on steady. Any call to start the motor in either VFD or bypass
modes will not start the motor but instead closes the Programmable
Output relay on the Controller board.
The Programmable Output can be used to actuate another device. When
this occurs, the Interlock Start Logic Commanded indicator also lights,
and the Interlock Start Logic Proofed indicator flashes.
A contact closure from this other device is wired to the Interlock Start on
the Controller Board which then starts the motor and turns the Interlock
Start Logic Proofed indicator on steady. This feature is also called
damper end switch relay logic.
Siemens Building Technologies, Inc. 7
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