Power Outage; Troubleshooting; Thermostat Reset - Honeywell RLV431 User Manual

Manual (hold) mode
To use the Manual mode, press the Mode button until
Man is selected (outlined) on the screen. Set the
desired temperature using the Up or Down button.
In this mode, any modification to the temperature
setpoint must be done manually.
Economy mode
To use the Economy mode, press the Mode button
until Econo is selected (outlined) on the screen. This
mode is ideal for weekend residences as it can be
used as follows: The temperature is kept at an econ-
omy level during most of your absence and is raised to
a comfortable level by your usual arrival time. If you do
not show up, the temperature returns to the economy
level until next weekend.
The economy mode has two periods which should be set as follows:
Period Temperature Setting
Set to a comfortable
1
level.
Set to an economy
2
level.
The economy mode should be used as follows:
Place the thermostat in Economy mode during your absence.
When you arrive, place the thermostat in Automatic mode or in
Manual mode before the temperature drops back to the
economy level.
When you leave, switch the thermostat back to Economy mode.
To program the two periods of the economy mode:
Press the Mode button until Econo is selected.
Press the Pgm button. The first period (1) is displayed.
Set the start day for the displayed period using the Day button.
Set the start time using the Hour and Min buttons.
Set the temperature for the period using the Up or Down button.
Press the Pgm button to select the next program (2).
Repeat steps 2 to 4 to set the day, time and temperature.
Press the Ret button to return the thermostat to normal opera-
tion.

Thermostat Reset

WARNING: When the thermostat is reset, all parameters (clock, con-
figuration and schedules) return to their default settings.
Lift the thermostat's cover.
Press and hold the Pgm button.
Insert a pointed object (e.g., paperclip) in the reset opening.
Remove it when the thermostat's screen becomes blank.
Wait one second and release the Pgm button.
RLV431
Start Time Setting
Set the day and time that you
want the temperature to start
rising so that a comfortable level
is attained by the time you arrive.
Set the day and time that you
want the temperature to start
dropping to an economy level if
you do not show up.

Power Outage

During a power outage, the thermostat display remains lit for approx-
imately the next 15 minutes during which the LP (low power) indica-
tor appears. The settings are stored in memory. However, if the
power failure exceeds 5 hours, only the thermostat's clock must be
re-adjusted. When power returns, the thermostat returns to the mode
of operation preceding the power outage.

Troubleshooting

PROBLEM
Thermostat's housing is
hot.
Wrong temperature is
displayed.
Wrong time is dis-
played.
Temperature does not
change according to the
programmed schedule.
LP reappears on the
screen and disappears
after a few minutes.
Display looks faded
when heating is acti-
vated.
7.
SOLUTIONS
This is normal. When the thermostat is
running at full capacity, its housing can
reach 40 °C (104 °F).
Correct if any the following conditions
applies:
• The thermostat is exposed to an
air draft.
• The sticker on the thermostat's
screen has not been removed.
• The thermostat is located near or
above a heat source such as a
light dimmer.
The thermostat was without power for
more than 5 hours.
• Ensure the thermostat is in Auto-
matic mode.
• Check the clock and the schedule.
If the thermostat is configured for
12-hour format, ensure that PM
appears on the screen when after-
noon times are displayed.
The thermal protection device on the
heater has temporarily opened. This
can happen if the heater is obstructed
by furniture or curtain and has over-
heated, or if the heater's thermal pro-
tection device is too sensitive.
The load of the heating system is prob-
ably less than the required minimum.
This thermostat cannot be used for
loads below that rating.
69-2073EF-1 2008-01-29
8.
9.
3/4