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

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