45
Table 3. Diagnostic Information
Error
Code
Screen
Text
Priority
0:high
1:middle
2:low
Message
Type
Condition
System Action
Action to Clear /
Recovery Condition
4
high tem
perature
protection
0
critical
High tempera
ture protection
when outdoor
ambient temper
ature exceeds
96°F (35.6°C)
All stages of heat are turned
off by safety relay.
This error is displayed on no
tification screen.
Once temperature
drops below 96°F
(35.6°C), the system
resume operation.
5
temperatur
e sensor
error
0
critical
Local tempera
ture sensor is
out of range
-40°F to 158°F
There is a fi
nite difference
between main
thermistor and
sub-thermistor
which is
greater than
5°F.
Indoor temp is displayed as
"--" on the home screen. This
will STOP all temperature re
lated operation.
All stages of heat are turned
off by safety relay.
This error is displayed on no
tification screen.
Either thermostat will
have to be replace or
if the sensor returns
to normal operating
range, the error mes
sage will automatical
ly clear and the sys
tem will resume oper
ation.