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Symptom
Heating,
Cooling or Air
Conditioning
System seems to
runs all night.
Wrench Symbol
flashes on LCD.
Emergency Heat
or E.Heating is
shown on LCD
without manually
selecting it.
Some buttons
do not appear to
operate. Padlock
is show on LCD.
Problem
Heating and or cooling
temperatures set for
unachievable value.
Heat Cool System set to Heat
Pump Mode.
Fan set to Fan ON mode.
Installer has left the thermostat
in Commissioning mode.
This is not a fault.
Keyboard lock is ON.
See page 18 for more
information on this function.
Solution
Set a lower heat temperature
and/or a higher cooling
temperature. Review manual on
setting temperatures.
Installer setting incorrect – call
for service.
Change fan mode to Auto.
Contact your installer and
request Commissioning mode be
disabled.
Your installer has set your
thermostat to automatically use
Emergency / Auxiliary Heating
if the outside air temperature is
very low.
This is not a fault. Buttons or
functions may be locked to
prevent unauthorized tampering.
42
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