Honeywell Thermostat TH8110U User Manual download pdf (Page 12)

69-1700 G.H. 03-04 www.honeywell.com/yourhome

TH8110U TOUCH SCREEN PROGRAMMABLE THERMOSTATS

Automation and Control Solutions

Honeywell International Inc. Honeywell Limited-Honeywell Limitée

1985 Douglas Drive North 35 Dynamic Drive

Golden Valley, MN 55422 Scarborough, Ontario

M1V 4Z9

CAUTION

Equipment Damage Hazard.

Minimum compressor off-time is bypassed

during Installer System Test.

Avoid cycling compressor quickly.

Table 7. System Test(s).

TROUBLESHOOTING (SEE TABLE 8)

Table 8. Troubleshooting.

Select

Installer

Setup

Number

Factory Setting Other Choices

CommentsOptions Description Options Description

Installer Test

Cool

Test 1 0 Cool is off 1 0—cool off

1—cool stage 1

turns on

System selection deter-

mines tests available and

number of stages shown.

Installer Test

Fan

Test 2 0 Fan is off 1 0— f a n o f f

1—fan turns on

Installer Test

Heat

Test 3 0 Heat is off 1 0—heat off

1—stage 1heat on

Symptom Possible Cause Action

Display does not come on. Thermostat is not being

powered.

Check for 24 Vac between C and Rc.

Verify AAA batteries installed correctly and good.

Temperature settings do not

change.

The upper or lower

temperature limits were

reached.

Check temperature setpoints.

Check Installer Setup Numbers 0600 and 0610;

modify.

The keypad is fully locked. Check Installer Setup Number 0670 to change keypad

lock options.

Heating or cooling does not

come on.

Thermostat minimum off-

time is activated.

Wait up to five minutes for the system to respond.

System selection is not set to

Heat or Cool.

Set system Selection to correct position.

O/B terminal is not set

correctly (Heat Pumps only).

Check Installer Setup Number 0190 and set correctly.

System type Selection is

incorrect.

Check Installer Setup Number 0170 and make sure

correct System type is chosen.

Thermostat is calling for Heat

(Heat on) or Cool (Cool on) but

no heating or cooling is running.

Heating or cooling

equipment is not operating.

Check wiring.

Check Installer Setup Number 0170; verify correct

system type is chosen.

Verify equipment operation in System Test mode.

Thermostat does not respond

when touchpad is pressed.

The keypad is locked. Check Installer Setup Number 0670 to change keypad

locked options.

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Honeywell Thermostat TH8110U User Manual Page 12

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