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Energy Monitor
• The Energy Monitor feature measures
and stores the amount of time the
heating and air conditioning system
operates. Usage can be displayed for Today (since
12 am), Yesterday, This Week (since Monday), Last
Week (last Monday through Sunday), and Total (up
to 999 hours). By monitoring your energy usage,
you see how much the set-back periods are sav-
ing. To review energy usage, press to cycle through
Today, Yesterday, this Week, Last Week, and Total.
Press again to return to normal mode, or wait 15
seconds for the display to return to normal mode.
You also can return to normal mode at any time by
pressing RUN.
• For example: This LCD display shows Today's usage to
be 10 Hours, 26 minutes.
• Press and hold for 3 seconds to reset the Energy
Monitor's counters. The display will blink, and counters
will be cleared to zero.
NOTE: Clearing the Energy Monitor counter will also clear
the Filter Monitor counter, as filter usage and total energy
usage are the same. Also, clearing the Filter Monitor
counter will clear ALL Energy Monitor counters as well.
Filter Monitor
Your thermostat keeps a record of the number
of hours your filter has been in use. To maxi-
mize your system's performance and energy
efficiency, change or clear your filter regularly.
• When the total system run time for heat and cool reaches
500 hours, you need to clean or change your system's
filter. FILT will continue to flash until the counter is set
back to zero.
• Press FILTER to review total filter usage. The
display will blink FILT, Then show the Filter
Monitor counter. After 15 seconds, the
display will return to normal mode, or you can
hit RUN to exit immediately.
The Filter Monitor will display up to 999 hours and
59 minutes of usage. In this example, the counter is at
410 Hours, 26 minutes.
• To reset the Filter Monitor counter, depress FILTER for
3 seconds. The display will blink and the counter will be
reset to zero.
NOTE: Clearing the Filter Monitor counter also will clear
ALL Energy Monitor counters, as Filter usage and Total
Energy usage are the same. Also, clearing the Energy
Monitor counters will clear the Filter Monitor counter as
well.
Keyboard Lock
The keyboard can be locked to prevent unauthorized
changes to the thermostat.
To lock or unlock the keyboard, press and hold
RUN key for 3 seconds. The keyboard is locked,
when LOCK appears on the display.
• When all keys are locked, LOCK will appear on the
display for 1 second any time a key is pressed.
Backlighting
Your thermostat has an electroluminescent lamp that
backlights the display for easy viewing in the dark.
When any key is pressed the display is illuminated.
The display will remain illuminated for 8 seconds after the
last key is pressed. This allows the light to stay on if you
need to operate several keys.
NOTE: If the thermostat is in Low Battery warning
condition, the backlight will not operate. Replace with 2
new AA alkaline batteries to restore the backlight function.
Low Battery Warning
Your thermostat has a two-stage low battery
warning system. When the batteries are first
detected to be weak, the first stage low battery
warning is indicated by BATT flashing on the
LCD display. At your earliest convenience, you
need to replace the batteries with 2 new AA
alkaline batteries.
When the batteries become too weak for normal operation,
the thermostat enters the second stage low battery warning
which shuts down the thermostat. In this condition, BATT
flashes alone on the display, and the thermostat will turn
your system off. Your system will remain off until the batter-
ies are replaced.
NOTE: The thermostat will still keep the current set
temperature and filter run time in memory until new
batteries are installed. After confirming that new batteries
have been inserted, the thermostat will return to normal
operation.
Error Mode
If the thermostat is unable to control your system due to an
unexpected battery problem, the thermostat will enter Error
Mode. In this condition, the thermostat flashes E1, E2, E3
or E4 on the LCD display, and shuts off your system. To
correct this problem, replace the batteries with 2 new AA
alkaline batteries, even if you have recently replaced them.
Press the reset button once with a small pin and hold for
two seconds then reprogram. You will need to confirm
normal operation.
If Error Mode returns, please call us for further information.
Warning Mode
If the Malfunction Input (L) from the heat pump is active,
the thermostat flashes E5 on the LCD display.
Auto Cut Off
Your thermostat will automatically shut down in Heat mode
if the room temperature rises above 95ºF (35ºC). It will shut
down in Cool mode if the room temperature drops below
40ºF (4ºC). Note that if your system has malfunctioned and
no longer responds to thermostat controls, the Auto Cut-Off
will have no effect.
TROUBLESHOOTING
Problem
Solution
SCRAMBLED OR
1. Remove clear mylar sticker.
DOUBLE DISPLAY
(numbers over numbers)
1. Check battery connections and
batteries.
NO DISPLAY
2. Press the reset button once with a
small pin and hold for two seconds
then reprogram.
ENTIRE DISPLAY DIMS
1. Replace batteries.
AUTO/FAN DOES NOT
1. Move ELEC/GAS selector to oppo-
site position.
TURN ON
2. There may be as much as a 4
minute delay before the heat or
cool system turns on. Wait and
check. (Compressor protection
delay)
3. Check your circuit breakers and
switches to ensure there is power
to the system.
4. Replace batteries.
5. Make sure your furnace blower
door is closed properly.
6. If your system only uses 4-wires,
be sure the jumper wire is installed
between the RC and RH terminals.
7. Check the position of the Furnace
or Heat Pump selector switches:
Normal/O/B.
ERRATIC DISPLAY
Press the reset button once with a
small pin and hold for two seconds
then reprogram.
IF UNIT CONTINUES TO
1. Replace unit.
OPERATE IN THE OFF
POSITION
THERMOSTAT
1. Replace unit.
PERMANENTLY READS
E1, E2, E3, E4
If you experience any other problems, contact Technical Support at:
www.invensyscontrols.com or (800) 445-8299
Two Year Limited Warranty
Invensys Controls warrants to the original contractor installer
or to the original consumer user that each new Robertshaw
Product shall be free from defects in materials and workman-
ship under normal use and service for a period of two (2)
years from the date of manufacture ("Warranty Period").
If any Product fails within the applicable Warranty Period,
Invensys Controls shall, at its sole option, repair or replace
the Product, provided that the Product is returned to
Invensys Controls' facility or designated agent within the
Warranty Period, with transportation charges prepaid, and
that the Product, upon examination by Invensys Controls, is
found to conform to this warranty. The above warranty does
not apply to: i) batteries; ii) improper installation; iii) Products
that have been damaged, misused, neglected, mishandled,
or altered in any manner whatsoever, and/or; iv) defects or
damage that result from use of the Product in other than its
normal and customary manner or in any manner not in
accordance with Invensys Controls' recommendations
and/or instructions. Any and all costs of labor, thermostat
removal, or reinstallation are not covered under this warranty
and shall be the sole responsibility of the consumer or
installer, as applicable.
THE FOREGOING WARRANTY IS IN LIEU OF AND
EXCLUDES ALL OTHER WARRANTIES, WHETHER VERBAL
OR WRITTEN, EXPRESS OR IMPLIED INCLUDING, EXCEPT
TO THE EXTENT PROHIBITED BY APPLICABLE LAW, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
SHALL INVENSYS CONTROLS BE LIABLE TO CONSUMER,
CONTRACTOR OR ANY THIRD PARTY FOR ANY
CONSEQUENTIAL, INCIDENTIAL, SPECIAL OR PUNITIVE
DAMAGES ARISING FROM OR RELATING TO USE OF THE
PRODUCT INCLUDING, BUT NOT LIMITED TO, LOSS OF
GOODWILL, LOSS OF PROFIT OR REVENUE, AND
PROPERTY DAMAGE, REGARDLESS WHETHER SUCH
LOSS OR DAMAGE IS BASED IN CONTRACT, WARRANTY,
TORT, NEGLIGENCE, STRICT LIABILITY, INDEMNITY,
PRODUCT LIABILITY, OR OTHERWISE AND EVEN IF
INVENSYS CONTROLS HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.
191 E. North Avenue
Carol Stream, Illinois 60188
www.invensyscontrols.com
©2007 Invensys Controls
352-00021-002 Rev A 8/07
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