TROUBLESHOOTING
33
ENGLISH
Symptom
Possible Cause
Correction Action
Heat, Cool or
Fan Runs
Constantly
Possible short in wiring,
thermostat, heat, cool or fan
system
Check each wire connection to verify they are
not shorted or touching other wires. Try
resetting the thermostat. If the condition
persists contact your HVAC service person.
Thermostat
Display &
Thermometer
Disagree
Thermostat display requires
adjustment
Display can be ad/-5°. See User Menu
item 05
Furnace (Air
Conditioner)
Cycles Too
Fast or Slow
(narrow or
wide
temperature
swing)
The location of the thermostat
and/ or the size of the Heating
System may be influencing the
cycle rate
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, 32 & 35) If an acceptable cycle rate
is not achieved, contact your HVAC service
person.
“Call for
Service” icon
appears on
displayed
1) Heating system is not able to
heat the space to within 10
degrees of the setpoint
within 2 hours
2) Cooling system is not able to
cool the space to within 10
degrees of the setpoint
within 2 hours
3) If -- is displayed for the Room
Temperature, a replacement
thermostat is needed
4) None of the buttons operate
on the thermostat
5) If Call for Service is flashing,
compressor self diagnostic is
detecting an issue with the
outdoor unit
1) See corrective action for No Heat
2) See corrective action for No Cool
3) Replace thermostat
4) Make sure keypad lockout is not turned on
( ), If it’s OFF, try reset shown below.
5) Contact a service person to verify the
outdoor equipment is operating correctly
Содержание AK-C3608H00
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