Earth Klear Sky 400, Owner'S Manual, Page: 34 / 57

15
The VFDs are preprogrammed at the factory. When a VFD
is replaced please see the following programming
instructions for the combustion fan only.
1. Power-up the VFD without the serial cable attached.
2. Press the ‘M’ button one time. The number displayed
on the right side of the VFD display will start flashing.
3. Press the UP or DOWN key until the number 10 is
flashing on the left of the VFD display.
4. If ‘L2’ is not displayed on the right side of the VFD
display then continue and do steps 5 through 7
otherwise, if ‘L2’ is displayed, skip steps 5 through 7.
5. Press the ‘M’ key one time and the right side of the
VFD display will start flashing.
6. Press the UP or DOWN key until ‘L2’ is displayed
(flashing) on the right side of the VFD display.
7. Press the ‘M’ key one time. The left side of the VFD
display will start flashing.
8. Press the UP key until the number 44 is displayed
(flashing) on the left side of the VFD display.
9. If the number 2 (for the combustion fan) or number 1
(for the catalyst fan) is not displayed on the right side
of the VFD display then continue and do steps 10
through 12 otherwise, if the correct number is already
displayed then skip steps 10 through 12.
10. Press the ‘M’ key one time. The right side of the VFD
display will start flashing.
11. Press the UP or DOWN key until the number 2 (for
the combustion fan) or number 1 (for the catalyst fan)
is displayed (flashing) on the right side of the VFD
display.
12. Press the ‘M’ key two times. Either ‘RD’ or ‘Ih’ will be
displayed on the left side of the VFD display. You are
now done after adjusting the VFD address. Skip step