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INSTALLER SELF-TEST
Use the Installer Self-Test to check the thermostat
configurations and operation. Refer to Table 3 for a list of
the available self-tests.
To start the self-test:
NOTE: The minimum off time for compressors is
bypassed during the Installer Self-Test.
Press and hold the increase
the same time, until two zeros appear. All segments of the
LCD are displayed before the two zeros appear.
Em Ht Temporary Setting
Aux Ht
Repl
Wait
Batt
System
Em HeatOffCool Auto Only
TEST MODE
NUMBER
Test
Key to
Mode
Press
Number
Heating Equipment Self-Test
10
i
11
10
Cooling Equipment Self-Test
30
i
31
30
Fan Equipment Self-Test (T8501D only)
40
i
41
40
and decrease
keys, at
Remote
Room
%Humid
Outdoor
Heat Cool
Fan
OnAuto
M4844
M6792
Table 4. Installer Self-Test Options.
Enter heating equipment self-test. (Set system switch to HEAT on switch models.)
Heat comes on. When Installer Setup mode number 02 is 01, the system fan is also
energized.
Heat and system fan turn off.
Change from heating to cooling equipment self-test. (Set system switch to COOL on switch
models.)
Cool and system fan come on.
Cool and system fan turn off.
Change from cooling to fan equipment self-test.
Fan comes on.
Fan turns off.
T8501A,B,C,D MICROELECTRONIC THERMOSTATS
Table 3. Tests Available In The Installer
Test
Number
10-19
Heating equipment can be turned on and off
30-39
Cooling equipment can be turned on and off
40-49
Fan equipment (T8501D only) can be turned
on and off.
60-69
System key or system switch position test
(not available on T8501A)
70-79
Thermostat information including date code
and software versions are displayed
Refer to Table 4 for the directions and results of the
specific tests.
IMPORTANT
Models with system and fan switches must set
the switches to the equipment that is being
checked for the equipment to operate.
NOTE: Press and hold the increase
keys for three seconds to exit the self-test mode.
The self-test times out after five minutes without
any key presses.
Description
7
Self-Test Mode.
Self-Test Description
and decrease
(Continued)
69-0959
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