29
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 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 notifi
cation screen.
Once temperature
drops below 96°F
(35.6°C), the system re
sume 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 sensor returns to
normal operating range,
the error message 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 displayed on notifi
cation screen.
Thermostat will need to
be replace.
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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