23
Fault Finding
Fault Finding
Fault Finding
Fault Finding
Fault Finding
Preliminary Electrical Systems Check
Preliminary Electrical Systems Check
Preliminary Electrical Systems Check
Preliminary Electrical Systems Check
Preliminary Electrical Systems Check
S T A R T
S T A R T
S T A R T
S T A R T
S T A R T
Isolate appliance
and carry out:
A:
A:
A:
A:
A: Earth Continuity
check.
Has inlet fuse blown?
Carry out:
C:
C:
C:
C:
C: Polarity check.
Electricity supply
should now be
satisfactory.
Carry out:
D:
D:
D:
D:
D: Resistance to
Earth check.
Inlet wiring
faulty.
Rectify any
fault.
Isolate appliance and
carry out:
B:
B:
B:
B:
B: Insulation check.
Rectify any fault
including replacing
fuses as necessary.
N O
N O
N O
N O
N O
YES
YES
YES
YES
YES
S O C K E T
S O C K E T
S O C K E T
S O C K E T
S O C K E T
(face view)
(face view)
(face view)
(face view)
(face view)
PLUG (with cover removed)
PLUG (with cover removed)
PLUG (with cover removed)
PLUG (with cover removed)
PLUG (with cover removed)
Earth Wire
Green/Yellow
Neutral Wire
Blue
( )
FUSE
( )
E
N
L
N O
N O
N O
N O
N O
YES
YES
YES
YES
YES
Brown
Blue
Green
Yellow
Brown
Blue
