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ComfortSense
t
Touch Screen Thermostat
Appendix B. Diagnostic Information and Hidden Menu Tables
Diagnostic Information Table
Condition
Display Text (Screen1)
Display Text
(Screen2)
System Action
Action to Clear /
Recovery Condition
ERROR MESSAGE
AC power loss for
more than 250ms (1/4
second)
Lithium Battery will remember
the clock for 30 days. All out-
puts will be off and O/B will re-
member the last state.
When AC power is restored,
normal operation resumes.
CPU memory error
OR
ROM error
Note: If either of these
errors occur, the dis-
play goes blank and
all relays are disabled.
No Operation
Replace Thermostat
Hi temperature protec-
tion: room temp. ex-
ceeds 96F (35.6C)
All stages of heat are turned
off.
If temperature goes down, it
will start working again. (Need
to reduce temperature in
space.)
Local Temp Sensor er-
ror: local temp sensor
reads out of range
−40F to 158F
TEMP SENSOR ERROR
CALL FOR SERVICE
Contact Info. Screen
Indoor temp is displayed as
"EE" on the home screen. This
will STOP all temperature re-
lated operation.
User − call dealer number from
contact information screen and
request thermostat replace-
ment, OR If the sensor reads
back to within the normal oper-
ating range, the error message
will be cleared. Start working
again.
EEPROM error (Pow-
er ON)
MEMORY ERROR
CALL FOR SERVICE
Contact Info. Screen
System shall restore every-
thing to ENERGY STAR
®
De-
fault and operate. If lithium Bat
tery has charge, it will remem-
ber the previous stored set-
tings.
User − call the dealer to re-
place thermostat.
EEPROM error (Oper-
ating)
MEMORY ERROR
CALL FOR SERVICE
Contact Info. Screen
System shall operate in normal
mode operation until power off.
User − call the dealer to re-
place thermostat.
Outdoor Sensor error
with Humiditrol
®
en-
abled (OR ODT was
used for balance point
control only): outdoor
sensor reads out of
range (−50F to 180F)
NO OUTDOOR SENSOR
REMIND SERVICE
See
REMIND/SERVICE
notes
No Humiditrol or Humidity op-
eration is run. D terminal stays
activated and other operation
will keep working.
Stat will stop the operation that
requires ODT infro i.e. be-
tween point control & stage
lock in. Stat will switch the
control to the operation that
does not require ODT informa-
tion.
The display of Outdoor sensor
from HOME will be turned
OFF. If user turns on the dis-
play from USER SETTINGS,
this error is displayed again.
If the outdoor sensor reads a
value out of its normal range.
(User can call the dealer to
re-
place outdoor sensor
)
Outdoor Sensor error
with Dew point control
enable: outdoor sen-
sor reads out of range
(−50F to 180F)
NO OUTDOOR SENSOR
REMIND SERVICE
See
REMIND/SERVICE
notes
No Dew point control or Hu-
midity operation is run. D ter-
minal stays activated and oth-
er operation will keep working.
Stat will stop the operation that
requires ODT infro i.e. be-
tween point control & stage
lock in. Stat will switch the
control to the operation that
does not require ODT informa-
tion.
The display of Outdoor sensor
from HOME will be turned
OFF. If user turns on the dis-
play from USER SETTINGS,
this error is displayed again.
If the outdoor sensor reads a
value within its normal range.
(User can call the dealer to
re-
place outdoor sensor
)
table continued on next page
