Rice Lake Combination System - Precision Loads PL9700 Indicator - Manual (Page 13)

Troubleshooting 9
5.0 Troubleshooting
Troubleshooting is a systematic process of testing, identifying, and eliminating areas of the weighing system that
are causing problems or malfunctions. The
PL9700 is designed to aid in troubleshooting by providing error codes
which identify problems. Many of the error codes will show either channel 1, the truck channel, or channel 2, the
trailer channel, whichever is applicable.
The PL9700 system has two wires going from each transmitter to their respective load cells. One wire has a red
band next to the loadcell connector and is called the red side and the plain black wire, to the other load cell, is
called the black side. The
PL9700 will sometimes refer to the red side or the black side in the error messages.
An effective and easy troubleshooting method is called substitution. For example, if the error message says the
red side is defective, swap the red and black wires at the load cells. If the error message remains the same, then
the trouble is with the wire. If the message changes to say the black side is defective, then the load cell is the
problem. The same idea can be used with the channel 1 and channel 2 wires at the back of the indicator.
The weight display will show Er CH1 if there is a problem with channel 1 or, if channel 2 is not working, Er
CH2 will be displayed.
Additional details to aid in troubleshooting will be shown in the information display window.
The following sections will show how the error codes are displayed, list the possible causes, and some
troubleshooting hints.
Ch.1 Red side defective
The red-banded wire may be damaged between the
load cell and the channel 1 transmitter.
• The load cell connected to the red-banded
wire of channel 1 may be defective.
• Swap the two load-cell cables. If the message
is the same, the red-banded wire is damaged,
possibly pinched or cut. If the message
changes to read the black side is defective,
then the load cell is the problem.
Ch.1 Blk side defective
The black wire may be damaged between the load cell
and the channel 1 transmitter.
• The load cell connected to the black wire of
channel 1 may be defective.
• Swap the two load-cell cables. If the message
is the same, the black wire is damaged,
possibly pinched or cut. If the message
changes to say the red side is defective, then
the load cell is the problem.
Ch.2 Red side defective
The red-banded wire may be damaged between the
load cell and the channel 2 transmitter.
• The load cell connected to the red-banded
wire of channel 2 may be defective.
• Swap the two load-cell cables. If the message
is the same, the red-banded wire is damaged,
possibly pinched or cut. If the message
changes to read the black side is defective,
then the load cell is the problem.
Ch.2 Blk side defective
The black wire may be damaged between the load cell
and the channel 2 transmitter.
• The load cell connected to the black wire of
channel 2 may be defective.
• Swap the two load-cell cables. If the message
is the same, the black wire is damaged,
possibly pinched or cut. If the message
changes to say the red side is defective, then
the load cell is the problem.
Ch.1 not connected
Channel 1 is not connected to its transmitter.
• The channel 1 wire may have been
disconnected at the back of the indicator.
• The channel 1 wire may be damaged between
the channel 1 transmitter and the indicator.
Disconnect the channel 1 wires from the
indicator. Assuming channel 2 is working,
connect the channel 2 wires to the channel 1
terminals. If the message stays the same, the
indicator is defective. If the message goes
away and channel 1 works again, then the
wire is the problem. Check for a cut wire or a
connector unplugged.