Sign Gear - Systems Ltd - Tel 01527 547521

LED is not working

Immediately

Converter failure

(overload, over temperature)

Measure the output voltage of the converter or at the LED module

Failure due to overvoltage

(wrong converter, incorrect voltage)

Measure the output voltage of the converter or at the LED module

Failure due to wrong polarity

Check the polarity at the module

After a short

period of time

Converter failure

(overload, over temperature)

Change the converter

Failure due to overvoltage

(wrong converter, incorrect voltage)

Measure the output voltage of the converter or at the LED module

Overheating of the converter Ta

(to high Ambient Temperature)

e.g. several converters mounted

directly next to each other

Measure the Ambient Temperature (Ta) & the Case Temperature (Tc) of the converter. Ensure there is sufficient space between modules for air flow

Overheating of the LED modules

(insufficient heat sink surface, bad connection between module and the heat sink, insufficient air convection)

Measure the Ta and Tc of the LED modules under real site conditions

Mechanical stress

(pressure on the Die/Globe top, bending of the LED module)

See Installation guidelines

Water

The housing / application must protect the LED module from water

Over current on the LED module

(too many LED modules in series)

See LED Power Consumption

Part failure of the LED module

Immediately / short period of time

Due to mechanical stress

(pressure on the Die/Globe top, bending of the LED module)

See Installation guidelines

Damage to the LED module

(pressure on the Die / Globe top, use of sharp tools)

See Installation guidelines

Damage to LED module electronic components

See Installation guidelines

LED's are flashing

Immediately / short period of time

Incorrect voltage

(incorrect converter, incorrect voltage)

Measure the output voltage of the converter or at the LED module, see data sheets

Too many LED modules

(overloading the converter)

Extra converters are required

See LED Power Consumption

Too many LED modules in series

Current to high per output channel

e.g. LED C004 PWM Booster

Extra converters are required

See LED Power Consumption

Extra Boosters required

Overheating of the converter Ta

(to high Ambient Temperature)

e.g. several converters mounted

directly next to each other

Measure the Ambient Temperature (Ta) & the Case Temperature (Tc) of the converter. Ensure there is sufficient space between modules for air flow

Colour deviation

Immediately / short period of time

Insufficient cooling of the LED module

Measure the Ta and Tc of the LED modules under real site conditions

Incorrect type (colour) of LED module

Check article number of LED module with data sheet

Damage to the LED module

(pressure on the Die / Globe top, use of sharp tools)

See Installation guidelines

Any chemical substances in close proximity to the LED modules

e.g. glueing, potting, sealing

Inform us of which substance is used

See Installation guidelines

White LED modules emit blue light

Immediately / short period of time

A chemical used on or near the LED module which reacts with the encapsulation material

Inform us of which substance is used

See Installation guidelines

Brightness

Immediately / short period of time

Incorrect voltage / current at the LED module

Measure the voltage on the LED module

Voltage drop of the wiring

e.g. distance to wire cross section

Measure the voltage on the LED module

Decrease the distance or increase the cross section of the cable

See Installation guidelines

Too many LED modules in series

Decrease the number of LED modules in series. Extra feeds from the converters required

In comparison with older LED modules

Only LED modules of the same age can be compared (Lumen Maintenance)

Please be aware of 15% +/- tolerance

Pre-fixed adhesive tape not adhering

Immediately

Insufficient smooth, even, cleaned and non-painted surface

Use a good metal surface for mounting

See Installation guidelines

Will not bond to  LED module

After a short period of time

Insufficient cooling over a long

 period of time

Measure the Ta and Tc of the modules

See Installation guidelines

Will not bond to  heat sink/surface

After a short period of time

Insufficient smooth, even, cleaned and non-painted surface

Use a good metal surface for mounting

See Installation guidelines

Insufficient cooling over a long

 period of time

Measure the Ta and Tc of the modules

See Installation guidelines

Whistling of the converter whilst dimming

Immediately / short period of time

This is due to the PWM dimming signal

Use a special Filter Capacitor

See Installation guidelines

Visible dimming steps with DMX

Only at low dimming levels

DMX resolution

Use only 16bit  DMX signals

LED C350 PWM RGB, incorrect dimming

Immediately

(strange effects in dimming, flickering, no response etc) 

Wiring

To many LED modules per channel

Incorrect input voltage

See data sheet

Use less LED modules per channel

Measure input voltage at module

EMC problems

(dimming)

Immediately

Distance from the controllers to the LED modules to great

Use "twisted pairs" of cables

Use "earthed cables"

See Installation guidelines