Rice Lake CLS-M User manual

July 22, 2013 156793
CLS-M Forklift Scale
Troubleshooting guide
PN 126179
Symptom Possible Cause Action
Scale displaying negative
weight
Forks are resting (even slightly) on the
floor.
Lift forks up off floor.
Scale reading high against test
weight.
Material, like wood debris, between the
scale and the forklift carriage.
Remove debris.
Material, like wood debris, between the
front and back scale plates.
Remove debris.
Centering pin touching the forklift
carriage, causing it to teeter back and
forth.
Adjust scale carriage, centering pin
should not touch on sides and
bottom.
Bottom cleats not adjusted properly or
loose.
Adjust to proper gap using jam nuts,
0.02”
If all these steps do not resolve your issue, check the following,
J-box error Open j-box and look for obvious
damage
Load cell errors Test mV/v levels, at 1.5 mV per 1,000
lb, test at 350 ohms
Calibration is required Calibrate the scale using RevolutionTM
Scale reading low against test
weight.
Zero key has been pressed with a
negative weight reading, while forks are
on the floor.
Lift forks off ground, press the Zero
key
Material, like wood debris, between the
scale and the forklift carriage.
Remove debris
Material, like wood debris, between the
front and back scale plates.
Remove debris
Centering pin touching the forklift
carriage, causing it to teeter back and
forth.
Adjust scale carriage, centering pin
should not touch on sides and
bottom.
Bottom cleats not adjusted properly or
loose.
Adjust to proper gap using jam nuts,
0.02"
If all these steps do not resolve your issue, check the following
J-box error Open j-box and look for obvious
damage.
Load cell errors Test mV/v levels, at 1.5 mV per 1,000
lb, test at 350 ohms
Calibration is required Calibrate the scale using Revolution.

2CLS-M Troubleshooting Guide
Scale not returning to zero (0) Forks are touching the ground. Lift forks off ground, press the Zero
key.
Material, like wood debris, between the
scale and the forklift carriage.
Remove debris
Material, like wood debris, between the
front and back scale plates.
Remove debris
Centering pin touching the forklift
carriage, causing it to teeter back and
forth.
Adjust scale carriage, centering pin
should not touch on sides and
bottom.
Bottom cleats not adjusted properly or
loose.
Adjust to proper gap using jam nuts,
0.02"
Scale is in motion, it won’t zero if the
forklift is moving:
• Forks moving up and down
• Forklift is being driven
Bring forklift to a complete stop and
ensure forks are still.
If all these steps do not resolve your issue, check the following,
J-box error Open j-box and look for obvious
damage.
Load cell errors Test mV/v levels, at 1.5 mV per 1,000
lb, test at 350 ohms.
Will not display small weight
values
Digital filter sensitivity is too high. Using Revolution:
scales menu/scales #1/filtering
change the digital filitering sensitivity to
light and change digital filter threshold
to 10.
Unstable weight Power connections faulty, low battery Check battery power cable.
Check for low battery voltage.
Symptom Possible Cause Action

CLS-M Troubleshooting Guide 3
No weight being displayed on
the handheld device.
Power switch off Turn on power switch
Coiled cable has loose connections or
wear.
Fasten coiled cable connections.
Replace coiled cable, if damaged.
Connected to Bluetooth on AWT
indicator.
Disconnect on MC75, scan new MAC
ID barcode label.
MAC ID barcode label does not scan. Order new MAC ID barcode labels
from Rice Lake Weighing Systems.
Check LED status See “COMMPOW box LEDs” below
If all these steps do not resolve your issue, check the following,
J-box sealing switch is in calibration
mode.
Move switch to weighing mode.
J-box load cell connections loose. Securely fasten connections.
J-box error Open j-box and look for obvious
damage.
Load cell errors Test mV/v levels, at 1.5 mV per 1,000
lb, test ohms.
Calibration is required. Calibrate the scale using Revolution.
Intermittent weight readings,
weight reading high and low.
Material, like wood debris, between the
scale and the forklift carriage.
Remove debris
Material, like wood debris, between the
front and back scale plates.
Remove debris
Centering pin touching the forklift
carriage, causing it to teeter back and
forth.
Adjust scale carriage, centering pin
should not touch on sides and
bottom.
Bottom cleats not adjusted properly. Adjust to proper gap using jam nuts,
0.02"
Check alignment of load cells. Adjust load cells.
Low forklift battery Charge forklift battery, disconnect
power prior to charging.
Check coiled cable for loose
connections & wear.
Fasten coiled cable connections.
Replace coiled cable, if damaged.
If all these steps do not resolve your issue, check the following,
Load cell connections on j-box Securely fasten connections.
J-box error Open j-box and look for obvious
damage.
Load cell errors Test mV/v levels, at 1.5 mV per 1,000
lb, test ohms using Revolution/Live
Weight Data/Cell 1 & 2 MV
Calibration is required. Calibrate the scale using Revolution.
Symptom Possible Cause Action

4CLS-M Troubleshooting Guide
Weight on forks, no displayed
weight.
Material, like wood debris, between the
scale and the forklift carriage.
Remove debris
Material, like wood debris, between the
front and back scale plates.
Remove debris
Centering pin touching the forklift
carriage, causing it to teeter back and
forth.
Adjust scale carriage, centering pin
should not touch on sides and
bottom.
Bottom cleats not adjusted properly. Adjust to proper gap using jam nuts,
0.02"
Low forklift battery. Charge forklift battery.
Coiled cable error Check coiled cable connections wand
wear and tear.
If all these steps do not resolve your issue, check the following,
J-box sealing switch is in calibration
mode.
Move switch to weighing mode.
Load cell connections on j-box loose. Securely fasten connections.
J-box error Open j-box and look for obvious
damage.
Load cell errors Test mV/v levels, at 1.5 mV per 1,000
lb, test ohms.
Calibration is required. Calibrate the scale using Revolution.
Symptom Possible Cause Action

CLS-M Troubleshooting Guide 5
COMPOW Box LEDs Power Supply PCB
Green LED “PWR LED1”
On COMPOW box turned on, power from
battery cable is good.
On, blinking Check power cable for short.
Check for low battery voltage.
Off Turn COMPOW box power switch ON.
Check fuses on battery connection
and power supply PCB.
Low forklift battery
Replace power supply PCB
USB/Bluetooth PCB
Green LED “HB LED4”
On J-box is transmitting valid data.
Coiled cable and j-box are working.
On, solid Change j-box
Off Check coiled cable and tighten
connections.
Check power switch.
Check PWR LED1
Check load cell connections.
Check j-box.
Red/Green LED “RS-232 LED5”
On Responding to commands from
Revolution software.
Off Not responding to commands from
Revolution software.
Blue LED “Bluetooth LED2”
On Successful connection
Off Disconnect AWT Bluetooth, scan
RLWS barcode.
Check “HB LED"
Check PCB cables.
Replace Bluetooth PCB.
Symptom Possible Cause Action

6CLS-M Troubleshooting Guide
Loctite is a registered trademark of Henkel Corporation, U.S.A.
Scale identifies itself as a “0”
serial number or incorrect
serial #.
Service technician is required to store the correct serial # using the “Download
Configuration” feature of the Revolution software.
Error message on MC75
handheld “No connection
could be made because the
target machine actively
refuses it”
The handheld device may be currently connected to a Weigh-Tronix forklift scale.
Cycle power on the Weigh-Tronix indicator to disconnect from handheld.
MC75 handheld on Bluetooth
will not connect to scale.
The handheld device may be currently connected to a Weigh-Tronix forklift scale.
Cycle power on the Weigh-Tronix indicator to disconnect from handheld, or
manually disconnect from the MC75 device.
Scale carriage is not fitting
securely on forklift during
installation.
May have to use electric grinder to grind
down the centering pin on the forklift
scale or center slot on forklift.
Discuss with local terminal manager to
determine if Con-Way maintenance
group or scale dealer is to perform this
chargeable service.
May have to grind or torch down the
area where the top cleats of the forklift
scale are mounted.
May have to grind or torch side of forklift
carriage due to previously installed side
shift protection method.
Handheld displays weight, but
will not transmit data.
Serial number is not six digits. Using Revolution, download the
correct serial number.
Loose screws on j-box Apply Loctite® 242 or 243 for greasy
enviroments, to screws and tighten.
Symptom Possible Cause Action
Rice Lake Weighing Systems