14
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
temperature
protection
0 critical
High temperature protec
tion when outdoor ambient
temperature exceeds 96°F
(35.6°C).
All stages of heat are turned off
by safety relay. This error is
displayed on notification
screen.
Once temperature drops
below 96°F (35.6°C), the
system resume operation.
5
temperature
sensor error
0 critical
Local temperature sen
sor is out of range -40°F
to 158°F.
There is a finite differ
ence between main ther
mistor and sub-thermis
tor which is greater than
5°F.
Indoor temp is displayed as "--"
on the home screen. This will
STOP all temperature related
operation.
All stages of heat are turned off
by safety relay.
This error is displayed on notifi
cation screen.
Either thermostat will have
to be replace or if the sen
sor returns to normal oper
ating range, the error mes
sage will automatically clear
and the system will resume
operation.
7
memory
error
0 critical
EEPROM error
(Power ON)
System will restore using to En
ergy Star defaults and resume
operations. This error is dis
played on notification screen.
Thermostat will need to be
replaced.
8
memory
error
0 critical EEPROM error (Operating)
System will operate in normal
mode operation until power off.
This error is displayed in notifi
cation screen.
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