Honeywell International Inc. TH8320ZW01 Manuale Utente
Operating Manual
18
69-2485EFS—03
ENGLISH
If you have difficulty with your thermostat, please try the following suggestions.
Most problems can be corrected quickly and easily.
Most problems can be corrected quickly and easily.
Display is blank
• Check circuit breaker and reset if necessary.
• Make sure power switch at heating & cooling system is on.
• Make sure furnace door is closed securely.
• Make sure power switch at heating & cooling system is on.
• Make sure furnace door is closed securely.
No response to
key presses (or
temperature will
not change)
key presses (or
temperature will
not change)
• Check to make sure the thermostat is not locked (see page 17).
• Make sure heating and cooling temperatures are set to acceptable ranges:
•
• Make sure heating and cooling temperatures are set to acceptable ranges:
•
Heat: 40° to 90°F (4.5° to 32°C)
•
Cool: 50° to 99°F (10° to 37°C)
Backlight is dim
• If thermostat is AC powered, a dim display is normal. The backlight
remains on at a low level, and brightens when a key is pressed.
Thermostat
shows the
calendar screen
(year, date, &
month) when the
power is restored
shows the
calendar screen
(year, date, &
month) when the
power is restored
• This indicates that the coin cell battery has drained out. Replace the
coin cell battery immediately.
In case of difficulty