8) This describes the essential skills and knowledge and their level, required for this unit. Evidence shall show that knowledge has been acquired of safe working practices and diagnosing and rectification of faults in complex lift systems. All knowledge and skills detailed in this unit should be contextualised to current industry practices and technologies. KS01-EG168A Lift components and systems - electrical/electronic Evidence shall show an understanding of diagnosing and rectifying faults in complex lift systems to an extent indicated by the following aspects: T1 Traction lifts encompassing: Lift control circuits (relay logic only): floor selector circuitry, Machine room control (selector) and well control (transducer) circuitry - direction slowing and stopping, re-levelling, door operator, acceleration, button, indicator/lantern, lights and emergency lights, travelling cables, key switch circuits, fans, main supply and power circuits T2 Safety circuits encompassing: Type, operation and actuation landing door locks, car door locks, emergency stop, pit switch, car trap-door switch, fire service, car top switch, tappet switch, governor switch, and safety gear switch, reverse phase relay, phrase failure relay and limit switches. T3 Maintenance, replacement and adjustment encompassing: Electrical and electronic lift components - travelling cables, tachometers, selectors, encoders and transducers. Safety devices: overloads, circuit breakers, limit switches, terminal stopping, door protection, governors and safety gear/switches. T4 Electrical layout/drawings and special requirements encompassing: Lift code and AS/NZS 3000 requirements specific lift symbols conduits trailing cable troughing colour coding and labelling segregation LV/ELV telephone and communication cabling regulatory requirements and door lock wiring. T5 Safety drive adjustment encompassing: Emergency stop button speed governor reverse phase protection broken chain/step switch broken main drive switch drive access switch start pressure switch and landing guards/barriers. T6 Lift components – electronic encompassing: Encoders Transducers Electronic boards Selectors Rectifiers Capacitors Resistors Processor Board I/O board T7 Drives - types, construction and operation encompassing: Traction Gearless types Note: Examples are: Speed/load characteristics, Efficiency, Application, Brakes, Electric prime mover (motor types and control) Geared types Speed/load characteristics, Efficiency, Application, Brakes, Electric prime mover (motor types and control) Other types of lifts (Drum, Rack and pinion, Chain, Screw) T8 Fault finding encompassing: Visual inspection Performance checks and application of fault finding principles |