Edition 1.2 (0608) Page 15 of 16
Troubleshooting
Symptom Suspected Fault Suggested remedy
Spanner icon on in LCD
Internal TZT-701 thermostat Fault detected.
Communication loss between main PCB and
wall controller should be strongly suspected.
Call temperzone service
Word “FAULT” shown on LCD A/C fault detected Call temperzone service
Air from the wall cavity may be leaking into the
rear of the thermostat / sensor enclosure.
Plug holes in wall with tape to prevent leaks
External heat or cool source such as lamps,
televisions or drafts from open doors affecting
the accuracy of sensor.
Move lamps, vents or other sources of
abnormal temperature away from sensors
Temperature display seems inaccurate
Sensor calibration may setting are incorrect Call temperzone service for information on
calibrating the air temperature sensor
Cannot enter heat or cool modes TZT-701 thermostat set for Heating or cooling
only modes
Heating or cooling mode not available on
your air conditioning system
Fan sometimes stops and starts
intermittently while heating is running
This may not be a fault. You air conditioning
system may be running a de-ice maintenance
function. The indoor fan is turned off during
these events to prevent drafts being felt inside
the building
If this occurs to often, an air conditioning
fault may have occurred.
Contact temperzone for information on this
event
Fan speed changes frequently This may not be a fault Your TZT-701 is choosing the most energy
efficient fan speed for the current conditions.
Try selecting a speed manually with the fan
button.
Fan On mode keeps the fan running 24
hours a day when in program mode, or the
fan stops shortly after heating stops.
This is not a fault. Your TZT-701 advanced fan management
program has been customised by your
installer.
Check air conditioning main fuse Reset home A/C fuse
Call temperzone service
Wall controller has no display
Faulty Wiring, fuse or TZT-701 Call temperzone service
Heating and or cooling temperatures set for
typical day time temperatures.
Set a lower heat temperature and/or a higher
cooling temperature. Review manual on
setting temperatures
Heating, Cooling or Air Conditioning
System seems to runs all night.
Fan set to Fan ON mode Change fan mode to Auto
Heating or cooling system seems to start
before the scheduled start time
Optimised Start function may be on.
This is an installer set function.
See optimised start on page 14 above
Call temperzone service for information on
turning this function off if required.
Some buttons do not appear to operate Key board lock is on.
See page 14 for more information on this
function.
This is not a fault. Buttons or functions may
be locked to prevent unauthorised tampering
Specifications
Input Voltage ................................................. 24VAC / 240VAC (fused) selectable
Operating Temperature ................................. 0-50°C (32 to 122F)
Operating RH ................................................. 0-95% (non condensing)
Size ................................................................. 113 x 103 x 23mm
Display Size ................................................... 74 x 55mm
Temp Sensors ................................................. 10K NTC type 3
Accuracy......................................................... +/- 0.3° C @ 21 C
Display resolution .......................................... 0.1 deg C
Control Range ................................................ Off to 38c
Outside Air temp display range..................... -8 ~ +60c
Back light ...................................................... Blue EL
Optimised Start method ................................ Time to Start Vs Temp Differential method
Communications Protocol.............................. Native RS485 - 150M max run with 4 core screened cable.
Warm Start ..................................................... Indoor Coil > 33°C.
Fan run-on in Heat cycle................................ Until Indoor Coil < 27°C (Default value. Adjustable by Installer)
Fan speeds....................................................... Based on evaporator coil temperature
Economy function ......................................... Available. See page 5 of Installer Manual for details
Approvals ....................................................... CE, C-tick
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