14580
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LIFTS AND ESCALATORS
Diagnose and repair faults and service
lift controls
level:
3
credit:
10
planned review date:
April 2001
sub-field:
Mechanical Engineering
purpose:
People credited with this unit standard are able to: plan and
prepare for work on lift controls; verify and identify the fault;
diagnose and repair faults in lift control systems; and carry
out completion work on lift controls.
entry information:
Open.
accreditation option:
Evaluation of documentation and visit by NZQA.
moderation option:
A national moderation system of local networks has been
established by the NZ Engineering, Food and Manufacturing
Industry Training Organisation.
special notes:
1
Definitions
Worksite procedure refers to the documented
procedures for the machine and/or worksite.
Statutory requirements may include but is not limited to
the relevant sections of the New Zealand Building Code
and the relevant standards such as the New Zealand
Standards (NZS) 3000:1997, Electrical Installations Buildings, Structures and Premises, and NZS
4332:1997, Non-Domestic Passenger and Goods Lifts.
 New Zealand Qualifications Authority 2016
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LIFTS AND ESCALATORS
Diagnose and repair faults and service
lift controls
2
All work practices must meet recognised codes of
practice and documented worksite safety procedures
(where these exceed code) for personal, product and
worksite safety, and must meet the obligations required
under current legislation. Legislation includes but is not
limited to the Health and Safety in Employment Act
(1992), and its subsequent amendments.
3
Range:
field wiring systems may include but are
not limited to - safety circuits, key switch
circuits, fans, lights, door lock circuitry,
buttons, lanterns, trailing flex;
discrete devices may include but are not
limited to - rotational and static devices,
slow down devices, directional circuits,
levelling circuits, stopping circuits, slow
down circuits, door control circuits, brake
circuits, thermal protection, overloads,
timers, phase reversal, emergency lighting
units, load weighing, passenger protection
devices;
solid state circuits may include but are not
limited to - emergency light units, DC
power supplies, variable voltage supplies,
variable speed hoist motor control,
variable speed door motor control;
 New Zealand Qualifications Authority 2016
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28-Jun-16
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LIFTS AND ESCALATORS
Diagnose and repair faults and service
lift controls
micro processor and digital control
systems may include but are not limited to
- multi-layered printed circuit boards,
computer
mother
boards,
central
processing units, digital to analogue (D/A)
converters, analogue to digital (A/D)
converters;
complex group systems may include but
are not limited to - relay logic circuits,
multi-function circuitry, group controllers,
despatching controllers.
4
To gain credit in this unit standard evidence must be
provided of competence in the diagnosis and repair of
faults in the following lift control systems: field wiring
systems, relay logic circuits, multi-function circuits,
discrete devices, solid state circuits, micro-processor
and digital control systems, complex group systems.
 New Zealand Qualifications Authority 2016
14580
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LIFTS AND ESCALATORS
Diagnose and repair faults and service
lift controls
Elements and Performance Criteria
element 1
Plan and prepare for work on lift controls.
performance criteria
1.1
An inspection of the worksite and the equipment to be diagnosed and repaired
is arranged according to worksite procedure.
1.2
Sequence of work is prioritised and coordination issues resolved with others
involved or affected by the work according to worksite procedure.
1.3
Resources required for the job including equipment, materials, plans, drawings,
tools, and personnel are identified, prepared, and transported to the worksite
according to worksite procedure.
1.4
Lift equipment is isolated from public hazard with minimal impact on fault
conditions in accordance with manufacturers’ specifications and worksite
procedure.
element 2
Verify and identify the fault.
performance criteria
2.1
The reported fault is confirmed with the customer and their requirements are
ascertained according to worksite procedure.
 New Zealand Qualifications Authority 2016
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LIFTS AND ESCALATORS
Diagnose and repair faults and service
lift controls
2.2
The performance requirements and function of the system are ascertained by
reference to relevant documentation.
2.3
Technical information, fault finding and diagnostic techniques are used to verify
reported faults, and the nature and cause of the faults are determined, from
available evidence according to worksite procedure.
2.4
Faults identified are recorded in accordance with manufacturers’ and worksite
procedure.
element 3
Diagnose and repair faults in lift control systems.
performance criteria
3.1
Wires, cables, and terminations are visually inspected for damage or loose
connections according to worksite procedure.
3.2
Components and support equipment are disconnected to enable accurate test
measurements of the faulty system according to worksite procedure.
3.3
Fault finding and diagnostic techniques are selected, interpreted and applied
according to manufacturer’s specifications and worksite procedure.
 New Zealand Qualifications Authority 2016
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LIFTS AND ESCALATORS
Diagnose and repair faults and service
lift controls
3.4
Information is used to identify the cause of the fault according to manufacturers’
specifications and worksite procedure.
Range:
information may include but is not limited to - fault indicators, error
codes, maintenance records, technical handbooks, systems
responses, company diagnostic tools.
3.5
Faults found are recorded in accordance with worksite procedure.
3.6
Conclusions about the cause of the fault are determined from the available
evidence and remedial action identified in accordance with manufacturers’
requirements and worksite procedure.
3.7
The faulty system is isolated and faulty, worn, damaged, or insecure
components are replaced, repaired or secured in accordance with
manufacturers’ specifications and worksite procedure.
3.8
Replacement components are selected and handled ensuring that they are
protected from static electricity according to worksite procedure.
element 4
Carry out completion work on lift controls.
performance criteria
4.1
Remedial action is identified and recorded in accordance with manufacturers’
requirements and worksite procedure.
 New Zealand Qualifications Authority 2016
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LIFTS AND ESCALATORS
Diagnose and repair faults and service
lift controls
4.2
Equipment is tested and monitored for compliance with manufacturers’
specifications and re-connected and entered into service in accordance with
worksite procedure.
4.3
The relevant parties are notified of work completion according to worksite
procedure.
4.4
Work site is cleared and equipment, plans, drawings, and tools returned
according to worksite procedure.
4.5
Records are completed according to worksite procedure.
Comments to:
NZ Engineering, Food and Manufacturing Industry Training Organisation
Unit Standard Revision
PO Box 160
WELLINGTON
by April 2001.
Please Note:
Providers must be accredited by the Qualifications Authority
before they can offer programmes of education and training
assessed against unit standards.
Accredited providers assessing against unit standards must
engage with the moderation system that applies to those unit
standards. [Please refer to relevant Plan ref: 0013]
 New Zealand Qualifications Authority 2016