Smart temp SMT?770 Installer Manual page 45

Symptom
The word OFF is flashing in
the LCD. Mode button has
no effect.
Some buttons do not
appear to operate.
Padlock is show on LCD.
Cannot enter heat or cool
modes
Cannot set heating and
cooling to desired value.
Padlock symbol flashes
Outside Air Temp display
is showing dashes
"Heat" or "Cool" is
flashing in the LCD.
Heating or cooling has not
started.
The Fan runs on for some
time after the heating or
cooling stops, even when I
turn the SMT‐770 OFF.
SMT‐770 displays wrong
mode (C or F).
Cannot select multiple fan
speeds
Suspected Fault
This is not a fault
Key board lock is on.
SMT‐770 thermostat set for Heating or cooling
only modes
This is not a fault.
Outside air temperature air sensor has failed.
No outside air sensor fitted.
This is not a fault. Heating or cooling will start
shortly.
This is not a fault.
The SMT‐770 can operate in both Deg C and
Deg F mode as set in installer menu.
SMT‐700 set for single fan speed Sw=OFF
Suggested remedy
TT=Of in advanced installer menu.
LC=XX value in advanced installer mode set
the lock values, see page 19.
Heating or cooling mode not available on
your air conditioning system
HL=XX (heating set point limit) and CL=XX
(cooling set point limit) restrict control
range. See page 19 for more detail.
Check wiring and outside air sensor.
Replace outside air sensor
Change TT=AO to TT=RS in advanced
installer menu.
Anti cycle delay in progress. This can be
disabled if required for commissioning.
See page 21.
The fan purge mode is set. FP=XX value
See page 19 for changing the CF=XX value
Turn SW1 to ON. NOTE, 3 fan speed mode
can only be used on single stage systems.
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