Vent-Axia HR205, User, Installation & Servicing Instructions, Page: 34 / 36

34
Fan Circuit Fault Finding Chart
11.0 Fault Finding
Is there
contin
uity across the
o
v
erhead ther
mostat?
(Ensure the o
v
erheat
ther
mostat is
belo
w 80
˚c)
Replace f
an
(section 10.3)
Replace f
an
(section 10.3)
YES
YES
YES
Re-align
fa
n
Replace
Ov
erheat
Ther
mostat
(section 10)
Is the
v
oltage across
G2 and G3 on
the f
an plug betw
een
80v and
160v?
Rectify f
ault.
Ensure contin
uity
across male and
female f
an plug.
NO NO
NO
NO
Are f
ans
free to
rotate?
Is the
fan f
ouling
on inlet
ring?
Star
t
WHC0039A
YES
For
H
R
205 Model On
ly
YES
YES
Disconnect
the capacitor
.
Is there betw
een
350 & 405 Ohms betw
een
the bro
wn & b
lac
k
wires from the
fan?
YES
YES
With
the capacitor
disconnected is there
160 - 200 Ohms resistance
betw
een the b
lac
k & b
lue
wires at the f
an
connector
G2/G3?
Is the
capacitor reading
appro
ximately
2 µF?
NO NO
Has the f
an
ther
mostat tr
ip
oper
ated.
(see note
1).
F
an has o
v
erheated.
In
v
estigate the
cause and rectify
.
Replace f
an
(section 10.3)
NO
Replace
capacitor
(section 10.4)
NO
Note 1 Electr
icity supply m
ust be
isolated and F
an Motor
temper
ature m
ust be less than
100
˚ to allo
w ther
mal tr
ip to
reset. Note 2 Electr
icity supply m
ust be
isolated and Ov
erheat
temper
ature m
ust be less
than 80
˚ to allo
w Ov
erheat
Ther
mostat to reset.
W
ARNING
If the Ov
erheat sensor or F
an
ther
mal tr
ip has oper
ated,
chec
k the entire system and
unit f
or correct installation.
Chec
k all ducting outside &
ter
minals f
or b
loc
kages
.
IMPOR
T
ANT
When in
v
estigating
o
v
erheating allo
w the unit to
run long enough f
or an
y f
ault
to become apparent.
1
2 3 4 5 6
Contr
oller
Connector
Bloc
k
C.Hood
Plug
Fa
n
Plug
D
E
3 2 1
G
F
B
A
C
1 2
1 2 1 2 3
O B C
L
N
Fuse
(3.15A
T)
L
N
160 140 120 100
80
V
oltage Selector
Wire