Fault Finding - Zanussi ZGF 782 Instruction Booklet

Fault Finding

Preliminary Electrical Systems Check
Blue
Brown
Green
Yellow
Blue
Green
Brown
Yellow
16
START
Isolate appliance
and carry out:
A: Earth Continuity
check.
NO YES
Carry out:
C: Polarity check.
Has inlet fuse blown?
NO YES
Inlet wiring
faulty.
Rectify any
fault.
Isolate appliance and
carry out:
B: Insulation check.
Rectify any fault
including replacing
fuses as necessary.
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
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
wires for continuity and all contacts clean
and tight.
B. INSULATION CHECK - Appliance
electrically disconnected, all switches ON.
a) meter set on
Test leads from L to N in appliance
terminal block. If meter reads «0» then
there is a short circuit.
b) meter set on
Repeat test with leads from L to E. If meter
reads less than
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)
( )
E
N
L
Electricity supply
should now be
satisfactory.
(Ohms) x 1
(Ohm), check all earth
(Ohms) x 1 scale.
(Ohm) x 100 scale.
(infinity) there is a fault.