Issue/Rev. 0.0 (10/18)
MN01047
•
Page 5
Section II – HRE Diagnostics (continued)
LED Indication
Cause
Recommendation
Channel A
Pulse
Channel B
Pulse
D14
Yes
Yes
On (Continuous)
No errors
None
No
No
Off
No power to the HRE.
Ensure that there is power to the board.
Check wiring for damaged insulation
or incorrect wiring.
No
No
Fast Blinks: 4
Slow Blinks: 2
There are no pulses coming from
the HRE. Invalid hardware state
detected internal to HRE.
Cycle power to the HRE. If continues or
reoccurs, replace the HRE board.
Yes
No
Fast Blinks: 4
Slow Blinks: 3
Magnetic sensor error – the
distance between the magnet
and integrated circuit surface is
too great.
Ensure that the HRE is completely seated in
the conduit box to allow a minimal distance to
the magnet. The board should not touch the
magnet, and ensure there is not debris between
the magnet and integrated circuit on the bottom
of the HRE.
No
No
Fast Blinks: 4
Slow Blinks: 4
Internal HRE Error
Replace the HRE board.
No
No
Fast Blinks: 4
Slow Blinks: 5
There was an error with the HRE
communications during power-up.
Internal HRE Data Error.
Cycle the power to the HRE board. If continues
or reoccurs, replace the HRE board.
Yes
Yes
Fast Blinks: 4
Slow Blinks: 9
A failure in hardware was detected. Replace the HRE board.
Note:
For other codes consult field service.
Table 3 – HRE Diagnostics
