10.07.2015 Views

Operating Manual - Webshop, Gas Analysis Technology

Operating Manual - Webshop, Gas Analysis Technology

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LED display°C >ON green°C < redFunction errorand statusalarmEquipment doesnot cool;Cooler has beenover-cooled (temp.< - 2°C);Probable causeAmbienttemperature < -2°CCooling compressorstopped;Cooling compressorruns continuously;Checking / CorrectionAmbient temperature must be+5°C!Check temperature at EC automatic control board(18.2);If temperature < ­2°C (< ­0,2V):Check PT100 temperature sensor (19.1);If not OK:Replace sensor.Solid-state relay defective;Replace EC automatic control board;25°C >ONgreenpinkLow-temperaturefunction affected;Low temperaturestages defectiveCheck the fine fuses in the EC30 mains supply;if o.k.:Check the voltage at pins 20/21 and 21/22 of theEC30 automatic control board (Fig. 15);°C 12V:Check the voltage for the EC30 temperaturesensors on the EC30 control board at pins 27/28and 33/34 (19.2);if voltage > 2,83V (> +10 C):Replace the relevant sensors;Peltier elements;if voltage < 2,83V (< +10 C):Check the voltage of the Peltier elements at pins23/26, channel , and pins 29/32, channel (Fig.15)if voltage for channel thus controlled (LED D16/D17) = 13VDC:Peltier element is defective; send cooler in forrepair;Heatexchangerfrozen upNo gas flow,sample gas pumpruns;Peristaltic pumpdefective;<strong>Gas</strong> flow too lowCheck peristaltic pump SR25.1if o.k.:Raise gas flow to min. 100l/h;<strong>Gas</strong> sampling and gas conditioning technology3-4.20-ME

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