Rice Lake CLS-M2 User manual

July 22, 2013 156791
CLS-M2 Forklift Scale
Troubleshooting guide
PN 151718
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.

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.
Scale reading incorrect weight
value
Ta re is e na b le d At stable zero weight, press the TARE key to
return to normal weighing mode.
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

CLS-M2 Troubleshooting Guide 3
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.
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, blinking Responding to commands from VIRTUi2.
VIRTUi2 interface configuration.
Off Not responding to commands from VIRTUi2
software.
Restart VIRTUi2 configurator.
Symptom Possible Cause Action

4CLS-M2 Troubleshooting Guide
Loctite is a registered trademark of Henkel Corporation, U.S.A.
VIRTUi2 displays INVALID. Calibration switch in open position
J-box error check wiring connections
Check load cell wires
Check excitation on j-box at 4.1.
Move calibrationswitch to closed position.
Press reset in VIRTUi2.
Correct wiring.
Change j-box.
VIRTUi2 weight display is blank. No power. Turn on C OMPOW
Check
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 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.
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