4.3 Start-up, Test Operation, and Rotation Check
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YASKAWA
SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference
Building Automation System Interlock Circuit (Drive and Bypass Enable Input)
The HOA keypad will display an “Interlock Open” alarm to indicate a BAS Interlock fault if a N.C. safety circuit
is not closed between DI-3 (TB2-3) and IG24 (TB2-10) on PCB A2 at power-up with a Run command in HAND
or AUTO mode. An open circuit between DI-3 (TB2-3) and IG24 (TB2-10) will prevent bypass operation.
This condition is an alarm and will prevent drive and bypass operation.
Take one of the following steps to ensure proper operation prior to startup:
• Install a N.C. BAS Interlock Circuit/Damper Interlock between DI-3 (TB2-3) and IG24 (TB2-10) on PCB A2.
or
• Install a jumper between DI-3 (TB2-3) and IG24 (TB2-10) on PCB A2.
11.
Record all other connections to the bypass by terminal number to determine if special programming of any of
the following is required:
• Multi-function Digital Inputs – Bypass control board TB2 (A2)
• Multi-function Digital Outputs – Bypass control board TB1 (A2)
• Analog Speed Reference - Bypass control board TB4 (A2)
• Other Analog Inputs – Drive control board (A1)
• Analog Outputs – Drive control board (A1)
• Differential PI control – Drive control board (A1)
• Serial Communications – Bypass control board TB3 (A2)
12.
Run all control wiring in separate conduit from motor or line power. Route digital output wiring exceeding 24 V
in conduit separate from other control wiring.
13.
Make sure that the building automation system logic is ready for the start, stop, and speed command
functions.
◆
Bypass Start-Up Procedure
1.
Replace all bypass and drive covers.
2.
Before you apply power to the bypass, use a properly rated multimeter to check all three-phases of input
power for proper levels and balance. Record these levels for future reference.
3.
Turn the main input disconnect handle (if equipped) clockwise to energize the bypass.
4.
When you energize the bypass for the first time, the keypad will show the Setup Wizard prompt screen.
The Setup Wizard will quickly configure and adjust commonly used parameters related to:
• Clock
• Motor FLA
• Frequency Reference
• Run Command
• Accel/Decel Times
• Safety Interlocks
• Speed Search
5.
Select [Yes] to run the Setup Wizard. After you complete the Setup Wizard, the bypass will not show the
Setup Wizard prompt again.
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