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THX9321 PRESTIGE
®
2.0 AND THX9421 PRESTIGE
®
IAQ 2.0 WITH EIM
68-0311—01 124
TROUBLESHOOTING
REGULATORY INFORMATION
FCC Compliance Statement (Part 15.19)
(USA only)
This device complies with Part 15 of the FCC Rules. Operation
is subject to the following two conditions:
1. This device may not cause harmful interference, and
2. This device must accept any interference received,
including interference that may cause undesired opera-
tion.
FCC Warning (Part 15.21) (USA only)
Changes or modifications not expressly approved by the party
responsible for compliance could void the user’s authority to
operate the equipment.
FCC Interference Statement (Part 15.105
(b)) (USA only)
This equipment has been tested and found to comply with the
limits for a Class B digital device, pursuant to Part 15 of the
FCC Rules. These limits are designed to provide reasonable
protection against harmful interference in a residential
installation. This equipment generates uses and can radiate
radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful
interference to radio communications. However, there is no
guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference
to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try
to correct the interference by one of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and
receiver.
• Connect the equipment into an outlet on a circuit different
from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician
for help.
Equipment interface module, thermostats
and outdoor sensor
To comply with FCC and Industry Canada RF exposure limits
for general population/ uncontrolled exposure, the antenna(s)
used for these transmitters must be installed to provide a
separation distance of at least 20 cm from all persons and
must not be co-located or operating in conjunction with any
other antenna or transmitter.
Portable Comfort Control
This portable transmitter with its antenna complies with FCC
and Industry Canada RF exposure limits for general
population/uncontrolled exposure. This device must not be co-
located or operating in conjunction with any other antenna or
transmitter.
Section 7.1.2 of RSS-GEN
Under Industry Canada regulations, this radio transmitter may
only operate using an antenna of type and maximum (or
lesser) gain approved for the transmitter by Industry Canada.
To reduce potential radio interference to other users, the
antenna type and its gain should be so chosen that the
equivalent isotropically radiated power (e.i.r.p.) is not more
than that necessary for successful communication.
Section 7.1.3 of RSS-GEN
Operation is subject to the following two conditions:
1. this device may not cause interference, and
2. this device must accept any interference, including inter-
ference that may cause undesired operation of the
device.
Table 14. Troubleshooting.
Symptom Action
Screen 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.
Screen is difficult
to read
• To change the screen brightness or color, see backlight options in the Preferences menu (see page 21).
• At 2 am each day, thermostats change screen colors for an hour, to prevent burn-in. Touch the screen at any
time to restore pre-set screen colors.
Heating or cooling
system does not
respond
• Press SYSTEM to set system to Heat. Make sure the temperature is set higher than the Inside temperature.
• Press SYSTEM to set system to Cool. Make sure the temperature is set lower than the Inside temperature.
• Check circuit breaker and reset if necessary.
• Make sure power switch at heating & cooling system is on.
• Make sure furnace door is closed securely.
• If “Waiting For Equipment” is displayed, the compressor protection timer is on. Wait 5 minutes for the system
to restart safely, without damaging the compressor.