15 of 20
© 2010
D 527 - 08/10
Tr
o
u
b
le
s
h
o
o
ti
n
g
Error M
e
s
s
ag
e
s
(
1
of 3
)
Error Messag
e
Description
C
O
NTR
OL ERR
OR
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 operat
e t
he heating while t
his err
or message is pr
esent.
Err
or clears once all adjust menu se
ttings in t
he Installer access le
v
e
l (unlock
ed) ha
v
e
been
check
ed. Se
t t
hermostat’
s swit
ch se
tting #4 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
vie
w
ed.
PORT ERR
O
R
Thermostat has been connect
ed t
o
a tN2 Zone alr
eady in use b
y
a 2-stage de
vice. A 2-stage de
vice
requir
es tw
o tN2 por
ts t
o
operat
e. This de
vice ma
y be connect
ed t
o
one such por
t.
Mo
ve
t
he t
hermostat’
s tN2 wir
es t
o
an unused tN2 por
t on t
he contr
ol.
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
entionally 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.
