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T8524C,D MULTISTAGE MICROELECTRONIC THERMOSTATS
a System fan is energized only if set for electric heat.
Thermostat Information
1. Press the Information i key to access the
thermostat information.
Table 4. Installer System Test Options.
2. Press the increase ▲ key to display the production
date code. The first two large digits are the month
and the third digit is the last digit of the year.
(Example: 026 = February 1996)
M4864
M4865
Key to
Press Test
Number Description
Heating Equipment System test
i 10 Enter heating equipment system test. (Set system switch to HEAT on T8524C.)
▲ 11 Stage-one heat comes on. The system fan is also energized.
a
▲ 12 Stage-two heat comes on. Stage-one heat and system fan remain on.
▼11 Stage-two heat turns off.
▼ 10 Stage-one heat and system fan turn off.
Cooling Equipment System test
i 30 Enter cooling equipment system test. (Set system switch to COOL on T8524C.)
▲ 31 Stage-one cool and system fan come on.
▲ 32 Stage-two cool comes on. Stage-one cool and system fan remain on.
▼31 Stage-two cool turns off.
▼ 30 Stage-one cool and system fan turn off.
Fan Equipment System test (T8524D only)
i 40 Change from cooling to fan equipment system test.
▲ 41 Fan comes on.
▼ 40 Fan turns off.
Key or Switch Operation System test
IMPORTANT
Test Numbers will only be displayed when the system is configured for the selected function.
EXAMPLE: Numbers 60, 61 and 62 are the only numbers that will be displayed when a system
is configured for heat only.
SYSTEM KEY OR SWITCH SYSTEM TEST (Move switch to see Test Numbers on T8524C.)
i 60 Change from cooling or fan to key operation system test.
System 61 Heat Test Number is displayed. (Set system switch to HEAT on T8524C.)
System 62 Off Test Number is displayed. (Set system switch to OFF on T8524C.)
System 63 Cool Test Number is displayed. (Set system switch to COOL on T8524C.)
System 64 Auto Test Number is displayed.
FAN KEY SYSTEM TEST (T8524D only)
Fan 68 Fan on Test Number is displayed.
Fan 69 Fan off Test Number is displayed.