IM483H/IM805H Rev. R032206
58
59
IM483H/IM805H Rev. R032206
L E D I n d i c a t o r s
G r e e n
The green LED is powered by the on-board +5V supply and indicates a “power
on” condition when illuminated.
R e d
The red LED is controlled by the fault output of the IM483H or IM805H driver.
If the red LED is illuminated turn off the power and check for a system fault.
A fault condition can only be reset by cyclying power or toggling the RESET
input at P1:6. In the case of an over-temperature fault allow the drive to cool
before re-applying power.
F a u l t P r o t e c t i o n
The INT-483H/805H adds phase to ground fault protection to the IM483H
or IM805H. If a phase to ground fault is detected the driver will set the fault
output, which will illuminate the red LED.
The INT-483H/805H buffers the drivers fault output signal through an open
drain N-channel FET. The signal at the terminal strip is inverted, thus it is ac-
tive LOW.
In the case of an over-temperature fault, neither the red LED or the fault output
will activate. The driver must be allowed to cool prior to re-applying power. If
this type of fault condition occurs verify that the HFC-22 is properly seated and
the fan is working.
The power must be cycled or the reset input toggled to clear the fault condition.
Refer to
Section 8: Troubleshooting
, of this document should the fault condition
not clear on power cycle or reset.
F u l l S t e p O u t p u t
The INT-483H/805H buffers the driver’s full step output signal through an
open drain N-channel FET. The signal at the terminal strip is inverted, thus it
is active LOW.
