Troubleshooting; System Tests - Honeywell TH8110U Installation Instructions Manual

TH8110U TOUCH SCREEN PROGRAMMABLE THERMOSTATS
CAUTION
Equipment Damage Hazard.
Minimum compressor off-time is bypassed
during Installer System Test.
Avoid cycling compressor quickly.
Installer
Setup
Select Number
Installer Test Test 1
Cool
Installer Test Test 2
Fan
Installer Test Test 3
Heat
TROUBLESHOOTING (SEE TABLE 8)
Symptom
Display does not come on.
Temperature settings do not
change.
Heating or cooling does not
come on.
Thermostat is calling for Heat
(Heat on) or Cool (Cool on) but
no heating or cooling is running.
Thermostat does not respond
when touchpad is pressed.
Automation and Control Solutions
Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
69-1700 G.H. 03-04
Table 7. System Test(s).
Factory Setting
Options Description
0 Cool is off
0 Fan is off
0 Heat is off
Table 8. Troubleshooting.
Possible Cause
Thermostat is not being
powered.
The upper or lower
temperature limits were
reached.
The keypad is fully locked.
Thermostat minimum off-
time is activated.
System selection is not set to
Heat or Cool.
O/B terminal is not set
correctly (Heat Pumps only).
System type Selection is
incorrect.
Heating or cooling
equipment is not operating.
The keypad is locked.
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Scarborough, Ontario
M1V 4Z9
Other Choices
Options Description
1 0—cool off
1—cool stage 1
turns on
1 0—fan off
1—fan turns on
1 0—heat off
1—stage 1heat on
Check for 24 Vac between C and Rc.
Verify AAA batteries installed correctly and good.
Check temperature setpoints.
Check Installer Setup Numbers 0600 and 0610;
modify.
Check Installer Setup Number 0670 to change keypad
lock options.
Wait up to five minutes for the system to respond.
Set system Selection to correct position.
Check Installer Setup Number 0190 and set correctly.
Check Installer Setup Number 0170 and make sure
correct System type is chosen.
Check wiring.
Check Installer Setup Number 0170; verify correct
system type is chosen.
Verify equipment operation in System Test mode.
Check Installer Setup Number 0670 to change keypad
locked options.
Comments
System selection deter-
mines tests available and
number of stages shown.
Action
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