Table of Contents
Advertisement
TROUBLESHOOTING (C0ntinued)
Symptom
Possible Cause
Furnace (Air
Conditioner)
Cycles Too Fast or
The location of the thermostat and/or
Slow (narrow or
the size of the Heating System may be
wide temperature
influencing the cycle rate
swing) /
No First Stage
Heat
1.) Heating system is not able to heat
2.) Cooling system is not able to cool
3.) If "--" is displayed for the Room
"Call for Service"
icon appears on
displayed
4.) None of the buttons operate on
5.) If "Call for Service" is flashing,
Resetting the Thermostat or Thermostat Settings
To conveniently reset only the user settings back to factory defaults, press the temperature
and
buttons and move the system switch from OFF to HEAT at the same time and hold until
the display goes blank and resets.
WARNING: This product contains a chemical known to the state of California to cause
cancer and birth defects and other reproductive harm.
NOTE: 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 againts 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 gurantee that interference will not occur in a partiduclar 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 or more 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
the space to within 10 degrees of
the setpoint within 2 hours
the space to within 10 degrees of
the setpoint within 2 hours
Temperature, a replacement
thermostat is needed
the thermostat
compressor self diagnostic is
detecting an issue with the
outdoor unit
CAN ICES-003 (B) / NMB-003 (B)
Corrective Action
Digital thermostats provide precise control and
cycle faster than older mechanical models. The
system turns on and off more frequently, but runs
for a shorter time. If you would like to increase
cycle time, choose SLO for slow cycle in the
Installer menu. (Reference menu items 30 & 35) If
an acceptable cycle rate is not achieved, contact
your HVAC service person.
1.) See corrective action for "No Heat"
2.) See corrective action for "No Cool"
3.) Replace thermostat
4.) Check for a stuck button
5.) Contact a service person to verify the
equipment is operating correctly
7
Advertisement
Table of Contents
