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769-0348—1
mask no. and
System Press Look for this
Switch This Response
Position Key Key Down Key Released
OFF 03 Blank
07 Blank
15 Blank
COOL or 15 Cooling, fan and
15 Cooling, fan and
OFF 06 Blank
02 Blank
05 Blank
04 Blank
01 Blank
00 Blank
12 See note A
OFF 08 Blank
13 Microprocessor
09 Blank
14 Blank
HEAT or 14
14
14
14
OFF 10 Blank
11
END SELF-TEST
A HEAT displayed when system switch is in HEAT, COOL
when in COOL, HEAT or COOL when in AUTO, neither
when in OFF. Also, a four-digit code is displayed, with each
digit explained on the next page.
AUTO (with
fan in AUTO)
CHANGE
TO LAST
PERIOD
SKIP
NEXT
PERIOD
PRESENT
SETTING
PRESENT
SETTING
PRESENT
SETTING
WARMER
COOLER
AHEAD
BACK
LEAVE
RETURN
WAKE
SLEEP
DAY
SET
HEAT/COOL
SET
PRESENT
DAY/TIME
SYSTEM LED on.
SYSTEM LED off.
revision no.
1st stage heating,
fan and SYSTEM
LED on.
AUTO
(with fan
in AUTO)
2nd stage heating
and AUX. HEAT
LED also on.
2nd stage heating
and AUX. HEAT
LED off.
1st stage heating,
fan and SYSTEM
LED off.
Normal operating
display.
SET
PRESENT
DAY/TIME
SET
PRESENT
DAY/TIME
HOLD
TEMP
SET
PRESENT
DAY/TIME
SET
PRESENT
DAY/TIME
RUN
PROGRAM
(CHECK
EACH
POSITION)
Perform the following test as a check of all thermostat
functions. If thermostat does not respond as indicated, ther-
mostat must be replaced.
1. Press AHEAD and BACK keys at the same time.
While holding keys down, all segments of the display should
be on, see Fig. 10.
2. Set system switch to OFF. Press AHEAD and BACK
and PRESENT SETTING keys at the same time to enter
self-test.
Fig. 10—All segments on display.
M410C
SUN MON TUE WED THU FRI SAT COOL ON HEAT ON
WAKE LEAVE RETURN SLEEP TEMPORARY
REPL
BAT
AM
PM
SET
PT
3. Press each key as listed below, and look for response
listed, as key is held down and released.