XLT XD-9005A - Manual (Page 83)

83
Technical Support US: 888-443-2751 Technical Support INTL: 316-943-2751
AVI VARIABLE FREQUENCY DRIVE (VFD) MANUAL MODE
The manual mode feature was designed to offer temporary operation of the exhaust fan at
full power if the VFD controller fails. Manual mode should not be used for normal day-to-day op-
eration and should only be utilized during emergency situations. The operator should return the
VFD controller back to normal run mode as soon as the VFD is repaired or replaced.
A key is supplied with the unit that unlocks both switches. The key must remain in keyed
switch #1, Standard Mode, during normal operation.
If the VFD fails, then follow these steps:
1. Rotate keyed switch #1 clockwise to the OFF position.
2. Wait until the VFD LED display and the POWER indicator lamp goes completely blank.
NOTE: This may take up to 1 minute!
After the VFD Controller display has gone off:
3. Remove the key from keyed switch #1 and insert it into keyed switch #2.
4. Rotate keyed switch #2 clockwise to the ON position.
The exhaust fan should now operate at full speed, and can be turned ON & OFF from this
switch.
CAUTION
Do not turn this switch off or on without allowing the VFD controller to com-
pletely shut down.
Failure to follow these instructions will result in damage to the VFD controller.
As soon as possible, ensure the VFD is either repaired or replaced. After the VFD is re-
turned to operating condition, then follow these steps:
1. Rotate keyed switch #2 counter-clockwise to the OFF position.
2. Wait for the exhaust fan to come to a complete stop.
3. Wait 5 minutes.
After the exhaust fan has come to a complete stop:
4. Remove the key from keyed switch #2 & insert into keyed switch #1.
5. Rotate keyed switch #1 counter-clockwise to the ON position.
6. Press the green <RUN> button on the VFD Controller to reactivate standard mode.
The VFD controller should illuminate & show <0.0>. Follow the steps outlined in the
VFD Adjustments section of this manual.
CAUTION
Ensure the exhaust fan has come to a complete stop before proceeding.
Failure to follow these instructions will result in damage to the VFD controller.
NOTE
Exhaust fan will run at highest speed (60 Hz) when in manual mode.
Standard Hoods ONLY