Johnson Controls TEC22x1-3 LONWORKS Installation Instructions Manual page 15

Table 8: Troubleshooting Details (Part 2 of 2)
Symptom Cause
Thermostat does Wrong mode
not call for heating selected
Thermostat in
Unoccupied mode
Anticycle delay
active
Heating setpoint is
satisfied
Heating lockout
attained
Wiring error
Thermostat does Wrong mode
not call for cooling selected
Thermostat in
Unoccupied mode
Anticycle delay
active
Cooling setpoint is
satisfied
Cooling lockout
attained
Wiring error
The thermostat Wiring error
does not turn on
the fan
Digital display Defective display
shows missing
digits or erratic
segments
Table 9: Display Messages
Display Function
Service Indicates that there is a service alarm in accordance with the programmable Digital Inputs (DI1 or DI2)
Filter Indicates that the filter(s) is dirty in accordance with the programmable Digital Inputs (DI1 or DI2)
Frost ON Indicates that the heating is energized by the low limit frost protection room temperature setpoint.
SetClock Indicates that there has been a power failure greater than 6 hours and the clock needs to be reset.
TEC22x1-3 L W ® Networked Single Stage Thermostats Installation Instructions
ON ORKS
Solution(s)
Select heating mode.
Select Override to force the thermostat Occupied heating setpoint.
Wait, the anticycling period must end before the equipment can start.
Raise the Heating setpoint.
Mode is locked out based on outside air temperature.
Change configuration parameter H Lock to value 120°F (49°C) to by-pass
lockout.
Start the Fan by forcing the Fan ON mode.
Put a jumper across terminals RH and W1. The heating should come ON.
If it does not, verify wiring .and check if a jumper is required between RC
and RH
Select cooling mode.
Select Override to force the thermostat Occupied cooling setpoint.
Wait, the anticycling period must end before the equipment can start.
Lower the cooling setpoint.
Mode is locked out based on outside air temperature.
Change configuration parameter C Lock to value -40°F (-40°C) to by-pass
lockout.
Start the Fan by forcing the Fan ON mode.
Put a jumper across terminals RC and Y1. The cooling should come ON.
If it does not, verify wiring.
Start the Fan by forcing the Fan ON mode
Put a jumper across terminals RC and G. The fan should come ON If it
does not, verify wiring.
Replace thermostat.
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