Carrier 40MKCF - Page 22

22
3 . --- W a t e r --- l e v e l a l a r m --- d i a g n o s i s a n d s o l u t i o n
Error Code E8
Malfunction conditions If the sampling voltage is not 5V, the LED displays the failure.
Possible Causes
• Wiring mistake
• Water--- level switch faulty
•Waterpumpfaulty
• Indoor PCB faulty
I
f
t
h
e wate
r
-
l
eve
l
sw
i
tc
h
is
i
nserte
d
we
ll
?
If the water-level switch
is inserted well?
No
I
nsert t
h
e wate
r
-
l
eve
l
sw
i
tc
h
we
ll
Insert the water-level switch well
I
f
t
h
e wate
r
-
l
eve
l
sw
i
tc
h
is
b
ro
k
en
?
If the water-level switch
is broken?
Yes
R
e
pl
ace t
h
e wate
r
-
l
eve
l
sw
i
tc
h
Replace the water-level switch
R
ep
l
ac
e
t
he
water
p
u
mp
,
I
f
mal
f
unctio
n
is
s
t
ill
not
so
l
ve
d
Replace the water pump, If
malfunction is still not
solved
Yes
No
Yes
R
eplace the indoor main P
C
B
Replace the indoor main PCB
Power o
ff
,
t
h
en restart t
h
e un
i
t
2
m
i
nut
e
s
l
ate
r
.
I
s
i
t st
ill
di
sp
l
ay
i
ng t
h
e error co
de
?
Power off, then restart the unit 2 minutes
later. Is it still displaying the error code?
Yes