tekmar 540 Thermostat Installation - Manual (Page 23)

23 of 28 © 2011 D 540 - 12/11
Tr
o
u
b
le
s
h
o
o
ti
n
g
Error M
e
s
s
ag
e
s
(
1
of 2
)
Error Messag
e
Descrip
tion
C
O
NTR
OL ERR
O
R
The t
hermostat w
as unable t
o
corr
ectly r
ead se
ttings fr
om memor
y and has r
eloaded t
he f
act
or
y
def
ault se
ttings. The t
hermostat does no
t oper
at
e t
he heating, cooling, or t
he f
an while t
his err
or
message is pr
esent.
Err
or clears once all adjust menu se
ttings in t
he Installer access le
vel (unlock
ed) ha
ve
been
check
ed. Se
t t
hermostat’
s swit
ch se
tting #3 t
o
unlock and unlock t
he t
ekmarNe
t ®
sy
st
em contr
ol.
Then pr
ess and hold
and
butt
ons t
o
ge
ther f
or 2 seconds t
o
ent
er t
he adjust menu. Continue
until all se
ttings ha
ve
been r
e
veiw
ed.
BUS ERR
OR
The t
ekmarNe
t ®
4 communication bus has eit
her an open or a shor
t cir
cuit. The r
esult is t
hat t
her
e
ar
e no communications. Check f
or loose wir
es. Check f
or shor
t cir
cuits be
tw
een t
he tN4 and C
wir
es on t
he House Contr
ol, Wiring Cent
er
, or Zone Manager
. Check f
or corr
ect polarit
y be
tw
een
the C and R wir
es.
Err
or clears aut
omatically once wiring f
ault has been corr
ect
ed.
If t
he t
hermostat is int
entionall
y r
emo
ved fr
om t
he t
ekmarNe
t ®
4 bus, pr
ess t
he
and
butt
ons
to
ge
ther t
o
clear t
he err
or message.
DEVICE LIMIT The number of de
vices on t
he t
ekmarNe
t ®
bus has e
xceeded 2
4. De
vices include t
ekmarNe
t ®
Thermostats and Se
tpoint Contr
ols. The de
vice count must be lo
w
e
red t
o
2
4
or less. If possible,
mo
ve
de
vices t
o
o
ther t
ekmarNe
t ®
buses.
Err
or clears aut
omatically once t
he number of de
vices on t
he t
ekmarNe
t ®
bus is at 2
4
or lo
w
e
r.