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Wiring Diagram

Fault Finding

Preliminary Electrical Systems

Check

Brown

Blue

Green

Brown

Yellow

START

Isolate appliance

and carry out:

A: Earth Continuity

check.

YES

Carry out:

C: Polarity check.

Has inlet fuse blown?

YES

Inlet wiring

faulty.

Rectify any

fault.

Isolate appliance and

carry out:

B: Insulation check.

Rectify any fault

including replacing

fuses as necessary.

A. IGNITOR SWITCH

B. IGNITOR UNIT

PLUG (with cover

removed)

( )

Earth Wire

Green/Yellow

Neutral Wire

Blue

Carry out:

D: Resistance to

Earth check.

A. EARTH CONTINUITY CHECK - Appliance must

be electrically disconnected - meter set on Ω

(Ohms) x 1 scale and adjust zero if necessary.

a) Test leads from any appliance earth point to earth

pin on plug. Resistance should be less than

0.1 Ω (Ohm), check all earth wires for continuity

and all contacts are clean and tight.

B. INSULATION CHECK - Appliance electrically

disconnected, all switches ON.

a) meter set on Ω (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 Ω (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.

SOCKET

(face view)

( )

Electricity supply

should now be

satisfactory.