Ohmeda Giraffe Spot PT Lite Maintenance Service Manual

Contents

Ohmeda Giraffe Spot PT Lite Maintenance Service Manual Manual pdf 16 page image

Service5-2 6600-0361-000 08/10/02 5-2TroubleshootingSymptom Possible Problem SolutionBulb does not light after Bulb is too hot for unit to switch on Allow bulb to cool for about 10 seconds andswitching unit off and reapply power. If left on fan will continue toback on. Over temp operate and assist in cooling the bulb.light doesn’t light.Power light is lit.Bulb doesn’t light Bad connection Check line voltage circuitry to power supply.Over temp light Bad power switch Trace line voltage from line filter through circuitdoesn’t light. Power Bad circuit breaker breakers and power switch to power supply.light doesn’t light. Bad line filter If line voltage is present going into any of thesedevices but not present on the output of thedevice, then replace that device.Bad power supply If line voltage is present at power supply, verifypower supply output. 12 volts should be presentat J2 pins 1 referenced to pin 4. If there is nooutput, replace power supply.Bulb doesn’t light. Bad bulb Replace bulb.Over temp light doesn’t Bad ballast Replace ballast*.light. Power light is lit,orArcing sound heard butbulb does not lightBulb doesn’t light or goes Dirty filter Unit is in overheat mode. Check fan inlet filter. outevery few minutes. Clean or replace filter if dirty.Over temp light is lit Bad main or ballast fan Verify that both fans are runningor goes out when bulb lights Bad thermostat Thermostat can be tested with an ohm meter. InPower light is lit. normal operation the thermostat should beclosed.Bulb lights but Power light Bad indicator board Replace indicator board.doesn’t light. Over templight doesn’t light.Low light output Lens blocked. Clean lens.Bad bulb. Replace bulb.Bad ballast Replace ballast*.Hour meter doesn’t display Bad hour meter Verify that 12 volts is present on J3 pins 2hours. Power light is lit. referenced to pin 4. If voltage is present replacehour meter.Hour meter doesn’t count Bad indicator board Verify that >11 volts is present on J3 pins 1hours when bulb is on. Bad hour meter referenced to 4. If voltage is present replace Powerlight is lit. Bad ballast hour meter. If voltage is less than 11 volts verifythat voltage at J1 pin 4 referenced to pin 5 is>1.421 volts. If voltage is present replaceindicator board. If voltage is not present,replace ballast*.*Due to the dangerous high voltage pulses and internal testing circuitry in the ballast, testing of the output is not recommended. Replac-ing the bulb with a known good bulb is recommended to determine if the problem is with the bulb or the ballast.