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T8535L MICROELECTRONIC COMMUNICATING NONPROGRAMMABLE THERMOSTAT
INSTALLER SYSTEM TEST
Use the Installer System Test to check the thermostat
configurations and operation. Refer to Table 3 for a list of
the available system tests.
To start the system test:
NOTE: The minimum off time for compressors is
bypassed during the Installer System Test.
Press and hold the increase
the same time until two zeros appear. All LCD segments
are displayed before the two zeros appear.
Em Ht Temporary Setting
Aux Ht
Repl
Wait
Batt
System
Em HeatOffCool Auto Only
Refer to Table 4 for the directions and results of the specific tests.
NOTE: Press and hold the increase
test times out after five minutes without any key presses.
Key to
Test
Press
Number
Heating Equipment System Test
i
10
11
12
11
10
Cooling Equipment System Test
30
i
31
30
Fan Equipment System Test
i
40
41
40
Key Operation System Test
System Key (When System switch is used, move switch to see Test Numbers.)
i
60
60
60
System
60
69-1307—1
and decrease
keys at
Remote
Room
%Humid
Outdoor
Heat Cool
Fan
OnAuto
M4844
and decrease
Table 4. Installer System Test Options.
Enter heating equipment system test. (Set System switch to Heat on switch models.)
First stage heat turns on.
Second stage heat turns on.
Second stage heat turns off.
First stage heat turns off.
Change from heat to cooling equipment system test.
First stage cool and system fan turn on.
First stage cool and system fan turn off.
Change from cooling to fan equipment system test.
Fan turns on.
Fan turns off.
Change from cooling or fan to key operation system test.
5 is displayed.
4 is displayed.
2 is displayed.
Table 3. Available Tests in the Installer System Test.
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 can be turned on and off.
60-69
System key test.
70-79
Thermostat information, including date code
and software versions, is displayed.
keys for three seconds to exit the system test mode. The system
Description
6
TEST NUMBER
System Test Description
M6792A
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