5-5
Section 5
Troubleshooting
G
o t
o Z
on
e
Diagnost
ic
s page
an
d n
ot
e t
he
a
ct
ua
l
tem
p
fo
r the zone
Zo
ne
tem
p
di
splay
s ‘+
++”?
The
rmo
co
uple
inser
ted to the
I/
O
bo
ar
d?
IO board
therm
istor
wor
king?
Bad
th
er
mo
coupl
e o
n
the heat
er
.
Replace
heater
Re
sistance v
alue
of
he
at
er
go
od
?
N
Wi
ri
ng
co
rr
ect
?
Y
Y
Y
Re
place he
at
er
N
Re
plac
e I
/O
bo
ar
d
N
Y
Corr
ec
t t
he
wi
ri
ng
N
Zon
e e
rr
or
:
Te
mp
er
at
ur
e
too high
FAS
ONLY!
Mult
iple
zo
nes
display
‘++
+’?
N
Y
Th
er
mo
co
up
le s
ho
rt
error.
Unplug each
thermocouple connecte
d
to the I
/O boa
rd one at
a
time. If i
ss
ue goes away,
note the he
ate
r po
sition
and rep
la
ce the h
ea
te
r.
Ve
ri
fy
2
zo
nes
display ‘
+++’
Y
Temperature Too High Issues Troubleshooting
Y
Y
Insert
the
th
er
mo
coupl
e
into the
I/
O board
N
Issue st
ill
exis
ts?
Y
