12
Error Codes
“--” — Thermistor failure
Temperature sensing element in the thermostat cannot
properly read room temperature. All outputs (except fan,
if set to on) will turn off. The thermostat must be re-
placed. In the case where the installer has selected to
average the local sensor and the remote sensor, the
display will alternate between “--” for the failed sensor
and the temperature sensed by the working sensor every
10 seconds. The thermostatl will operate from the
temperature sensed by the working sensor.
E1 — The thermostat and the I/O board cannot communi-
cate via two-wire connection.
E4 — Internal memory failure. When this error is present
and power is cycled to the thermostat all of the installer
configurations, program schedule settings and user
settings will be factory default values. Replace the
thermostat.
I/O Board Error Codes —
Error codes for the I/O board are indicated by the flash rate
of the on board LED. The slow flash rate is the first digit,
and the fast flash rate is the second. During normal
operation the flash rate of the LED will be 1 second on, 1
second off.
23—Flash Memory Error. Replace the I/O Board.
25—EEProm (Memory) Error. Replace the I/O board.
27—RAM Memory Error. Replace the I/O Board.
32—Device out of range. Check antenna connection.
34—No communications with thermostat. Check connec-
tions between the I/O board and the thermostat.
36—No communications with the Radio. Check cable
connection between the thermostat radio and the I/O
board.
Table 4 - Auxiliary Device Program Schedule
M
A
R
G
O
R
P
D
O
I
R
E
P
E
M
I
T
X
U
A
Y
A
L
E
R
e
k
a
W
M
A
0
0
:
4
n
O
y
a
D
M
A
0
0
:
9
f
f
O
e
v
E
M
P
0
0
:
3
n
O
p
e
e
l
S
M
P
0
0
:
1
1
n
O
