Published: 10/27/2005
| Question: | What is the purpose of the TEST switch on the front panel of an E7B bypass unit? |
| Answer: | The TEST switch is only available when in the Bypass Mode. It is used to energize the input contactor to the Drive while the unit is operating in Bypass.
When in TEST mode the drive can be programmed, or other "tests" performed while the motor runs on the power line at full speed in Bypass Mode. TEST MODE engages the input contactor and three phase AC power is applied to the drive.
The output contactor, however, will not be energized, this isolates the motor from the drive's output voltage.
When placed in the Drive Mode, switching from NORMAL to TEST position will remove the Drive run command and the motor will stop.
Please refer to the "Selector Switch Functions" section found on page 4-9 in the E7B Drive / Bypass Technical Manual (TM.E7B.01)
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Product Information:
| Product Group: | Inverters/Drives |
| Product: | E7B Drive Bypass |
| Applications: | HVAC |
| Category: | Bypass Function; Operation |
| Part/Model#: | E7B bypass |
Other Information:
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Please read and understand the product instruction manual before installing, servicing or operating Yaskawa products. FAQ content and illustrations are provided as technical advice to augment the information in manual, not superceed it. It is not possible to give detailed instructions for all types of installation or support activities. The information described in the FAQs are subject to change without notice to improve the product or FAQ. Yaskawa assumes no responsibility for errors or omissions or damages resulting from the use of the information contained in any FAQ.
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