Intermec PB51 Forklift Power Supply Installation Guide - Page 38

Chapter 3 - Troubleshooting Troubleshooting Power Failure With the Main Output LED LED Lit Not lit Flickers Flickers Flickers Flickers LED not lit No output voltage, input normal Meaning Possible Solution The power supply is working. Test or substitute output power cable. No output from the power supply. Try the possible solutions in this order: 1 Disconnect the power output cable. 2 Reset the power supply. 3 Check the fuse. There is an intermittent Check connection to the main main power connection. power source. The power supply The forklift noise spikes are detected an over-voltage exceeding voltage rating for the condition. power supply. Work with your forklift manufacturer to look for alternate power connection locations. Check to see whether they have any recommended inline filters or suppressors. The power supply Disconnect the output cable. If detected an over-current the flickering stops, check the condition. cables and add downstream elements. The power supply detected an over temperature condition. Try the possible solutions in this order: 1 Check the case temperature of the power supply. If too hot to touch, provide better heatsink and more air flow. 2 Replace damaged cables. 3 Protect from direct sunlight and mount in the shade. No output from the power supply. Test for input voltage. Power supply not working. Replace power supply. 28 Forklift Power Supply Installation Guide