Assessments - 3, GPA: 4.3 ( )

Fabricante : Bosch Arquivo Tamanho: 130.35 kb Arquivo Nome : Língua de Ensino:

Rectify any fault including replacing fuses as necessary. NO YES SOCKET (face view) PLUG (with cover removed) Earth Wire Green/Yellow Neutral Wire Blue ( ) FUSE ( )E N L Brown Blue Green Yellow Green Yellow Brown Blue NO YES Fault Finding Preliminary Electrical Systems Check START Isolate appliance and carry out: A: Earth Continuity check. Has inlet fuse blown? Carry out: C: Polarity check. Electricity supply should now be satisfactory. Carry out: D: Resistance to Earth check. Inlet wiring faulty. Rectify any fault. Isolate appliance and carry out: B: Insulation check. Rectify any fault including replacing fuses as necessary. NO YES SOCKET (face view) PLUG (with cover removed) Earth Wire Green/Yellow Neutral Wire Blue ( ) FUSE ( )E N L Brown Blue Green Yellow Green Yellow Brown Blue NO YES A. EARTH CONTINUITY CHECK Appliance must be electrically disconnected - meter set on W (Ohms) x 1 scale and adjust zero if necessary. — Test leads from any appliance earth point to earth pin on plug. Resistance should be less than 0.1 W (Ohm), check all earth wires for continuity and all contacts clean and tight. B. INSULATION CHECK Appliance electrically disconnected, all switches ON. a) meter set on W (Ohms) x 1 scale. Test leads from L to N in appliance terminal block. If meter reads «0» then there is a short circuit. b) meter set on W (Ohm) x 100 scale. Repeat test with leads from L to E. If meter reads less than . (infinity) there is a fault. NOTE - Should it be found that the fuse has failed but no fault is indicated a detailed continuity check (i.e. by disconnecting and checking each component) is required to trace the faulty component. It is possible that a fault could occur as a result of local burning/arcing but no fault could be found under test. However a detailed visual inspection should reveal evidence of burning around the fault. Fault finding Ignition System / Gas Ignition Ignitor does not spark YES Check gas supply at burner NO Check plug top fuse and replace if necessary Light burner manually Check by pass simmer Check polarity and earth adjusted continuity of supply point Check position of the Check fitting Check earth continuity electrode of burners of appliance Check continuity from 'N' on the Check continuity from the tip of mains connector block and "O" on each electrode to the terminals 1 the ignitor unit to 4 on the ignitor unit Check continuity from 'L' on the Check for breaks in the insulation mains connector block and the of the HT leads taps ignition switches Change the taps ignition Check continuity from ignition switches connector to ignitor unit switches Change the ignitor unit Commissioning When the hob has been fully installed it will be necessary to check the minimum flame setting. To do this, follow the procedure below. . + 1) Turn the gas tap to the MAX position and ignite. 2) Set the gas tap to the MIN flame position then turn the control knob from MIN to MAX several times. If the flame is unstable or is extinguished follow...

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