Rice Lake Combination System - Precision Loads PL9710 Indicator - Manual (Page 19)

PL9710 Installation Manual - Troubleshooting 15
8.0 Troubleshooting
Troubleshooting is a systematic process of testing, identifying, and eliminating areas of the weighing system that
are causing problems or malfunctions. The
PL9710
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
PL9710
system has two wires going from each transmitter to their respective load cells. One wire has a red
band next to the load cell connector and is called the red side and the plain black wire, to the other load cell, is
called the black side. The
PL9710
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.