User's Manual

R900 Wall and Pit MIU Installation and Maintenance Guide 29
6 Maintenance and Troubleshooting
This section takes you through maintenance and troubleshooting procedures for
the R900 MIU. The first topic will guide you through the steps necessary to replace
the battery that is in the main housing.
In addition, this section will guide you through some troubleshooting procedures
for both a six-wheel and a four-wheel encoder.
Six-Wheel Encoder Normal Operation
If the odometer reads 123456, the display should show 1 2 3 4 5 5.
Four-Wheel Encoder Normal Operation
If the odometer reads 123456, the display should show 1 2 3 4 0 0.
Abnormal Operation
Below are examples of abnormal operation for four-wheel encoders. Abnormal
operation for six-wheel encoders is similar except that digits occupy all six posi
-
tions.
• If an (H) or a ( - ) occurs on any of the four positions, the display on the HH
will display it.
Examples: 1 2 - 4 0 0 or 1 2 H 4 0 0
• If the wire between the R900 wall MIU and the encoder is cut or reads as open,
the display on the HH shows dashes.
Example: - - - - -
• If using ECRIII, verify data format is correct.
• If using a non-AutoDetect ProRead (ARB VI) register, verify that it has been
programmed correctly. All non-AutoDetect ProRead (ARB VI) registers must
be programmed for 3W mode.
• Use the magnet on the R900 MIU to force the R900 to read the encoder.
• On the handheld, check the System Setup menu and verify the adapter type is
set to R900.
Hourly Reads
ProRead (ARB VI) registers are read every hour and E-Coder (ARB VII) is read
every 15 minutes.
Note that the last digit displayed is a five if the last digit on the odometer is five through nine. The
last digit displayed is a zero if the last digit on the odometer is zero through four.
continued on next page