506180−01 09/08
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Appendix B. Diagnostic Information and Hidden Menu Tables
Diagnostic Information Table
Mes
sage
Type Condition Display Text (Screen1)
Display Text
(Screen2)
Priority System Action
Action to Clear /
Recovery
Condition
Error AC power loss
with battery
(Battery Model
Only)
No message Thermostat can detect
AC power loss and Stat.
will operate with batter-
ies.
When AC power re-
covers stat. can detect
and will operate on
AC.
Error AC power loss
without battery:
AC power loss
for greater than
250ms
No message Super Cap Or Lithium
Battery will remember
the clock. All outputs
will be off and O/B will
remember the last state.
When AC power (or
battery power) is re-
stored, normal opera-
tion resumes.
Error CPU memory
error
Note: If this Er-
ror occurs the
display goes
blank and all
relays are dis-
abled.
Not operate
Error ROM error
Note: If this Er-
ror occurs the
display goes
blank and all
relays are dis-
abled.
Not operate
Error Hi temperature
protection:
ambient temp.
exceeds 96F
(35.6C)
No message All stages of heat are
turned off.
If temperature goes
down, it will start work-
ing again.
Error Local Temp
Sensor error:
local temp sen-
sor reads out
of range −40F
to 158F
TEMP SENSOR ERROR
CALL FOR SERVICE
Contact Info. Screen 0−Red
Alert
Indoor temp is dis-
played as "EE" on the
home screen. This will
STOP all temperature
related operation.
User have to call the
number from contact
information screen and
have someone come
and replace the stat.
OR If the sensor read
back to with in the nor-
mal operating range,
the error message will
be cleared. Start work-
ing again.
Error EEPROM error
(Power ON)
MEMORY ERROR
CALL FOR SERVICE
Contact Info. Screen 0−Red
Alert
System shall restore ev-
erything to Energy Star
Default and operate. If
lithium Bat OR Super
Cap has Charge, it will
remember the previous
stored settings.
User shall call the
dealer.
Error EEPROM error
(Operating)
MEMORY ERROR
CALL FOR SERVICE
Contact Info. Screen 0−Red
Alert
System shall operate in
normal mode operation
until power off.
User shall call the
dealer.
table continued on next page
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