Sime SUPERIOR Ci EI, Инструкция по установке и эксплуатации

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If an electrical fault occurs on the appliance the preliminary
electrical system checks contained in the British Gas Multi-
meter Instruction Booklet must be carried out first.
When any service or replacement of electrical components
which has required the breaking and re-making of electrical
connections has taken place, the following tests must be
repeated:
– Earth continuity
– Short circuit
– Polarity
– Resistance to earth
6.1 EARTH CONTINUITY CHECK
Appliances must be electrically disconnected the meter set
on
Ω
[ohm] x 1 scale and adjust the zero if necessary. Tests
leads from any appliance earth point [e.g. inside control box]
see wiring diagrams [section 7] to earth pin on the plug or
mains inlet point. Resistance should be less than 1
Ω
[ohm]. If
turn resistance is greater than 1
Ω
[ohm], check all earth
wires for continuity and all contacts are clean and tight. If the
resistance to earth is still greater than 1
Ω
[ohm] then this
should be investigated further.
6.2 SHORT CIRCUIT CHECK
Switches turned FULL ON meter set on
Ω
[ohm] x 1 scale and
adjust the zero if necessary. Test leads from L to N on applian-
ce terminal block, if meter reads 0 then there is a shout cir-
cuit.
Meters set on
Ω
[ohm] x 100 scale and adjust the zero if
necessary. Repeat it 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 discon-
necting and checking each component] is required to trace
the faulty component.
It is possible that a fault could occur as a result of local bur-
ning/arcing but no fault could be found under test. However,
a detailed visual inspection should reveal evidence of burning
around the fault.
6.3 POLARITY CHECK
Appliance reconnected to mains supply and meter set on
300 V ac scale. Test at appliance terminal block:
– Test leads from L to N meter reads approx. 230 V ac.
– Test leads from L to E meter reads approx. 230 V ac.
– Test leads from N to E meter reads from 0 to 15 V ac.
6.4 RESISTANCE TO EARTH CHECK
Appliance must be disconnected from main supply and meter
set on
Ω
[ohm] x 100 scale and adjust the zero if necessary.
All switches including thermostat on test leads from L to E –
if meter reads other than infinity [
∞
] there us a fault, which
should be isolated. A detailed continuity check is required to
trace the faulty component.
IMPORTANT: These series of checks are the first electrical
checks to be carried out during a faultfinding procedure.
On completion of the service/fault finding task which has
required the breaking and remaking of electrical connec-
tions then the checks 6.1 Earth continuity, 6. 3 Polarity and
6.4 Resistance to earth must be repeated.
6 FAULT FINDING