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Table 8: Troubleshooting Details (Part 3 of 3)
Symptom
Cause
Heat Pump does
Wrong mode
not operate in
selected
heating mode
Thermostat in
Unoccupied mode
Heating setpoint is
satisfied
Anticycle delay
active
Heating setpoint
satisfied
Low balance point
attained
Heating lockout
attained
Wiring error
Wrong reversing
valve configuration
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.
Technical Specifications
TEC22x2-3 L
W
ON
ORKS
Power Requirements
Relay Contact Rating
Digital Inputs
Wire Size
L
W
Network Standard
ON
ORKS
Temperature Sensor Type
Temperature
Backlit
Range
Display
Heating
Control
Cooling
Control
Accuracy
Temperature
18
TEC22x2-3 L
W
ON
Solution(s)
Select Heating mode.
Select Override to force the thermostat Occupied heating setpoint.
Raise the 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 Low BP to value -12°F (-24°C) to by-pass
lockout.
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 & W1. The heating should come ON. If it
does not, verify wiring and check if a jumper is required between RC & RH.
Wrong selection of parameter Reversing Valve.
Select O to energize the valve in cooling operation. Valve is normally heat.
Select B to energize the valve in heating operation. Valve is normally cool.
Networked Heat Pump Thermostat (Part 1 of 2)
19 to 30 VAC, 50/60 Hz, 2 VA (Terminals RC and C) at 24 VAC Nominal, Class 2 or
Safety Extra-Low Voltage (SELV)
30 VAC, 1.0 A Maximum, 3.0 A In-Rush, Class 2 or SELV
Voltage-Free Contacts across Terminal C to Terminals DI1 and DI2
Unshielded Twisted Pair - 22 AWG (0.6 mm Diameter) Minimum, 18 AWG (1.0 mm
Diameter) Recommended
64 Devices Maximum without repeater, 128 Devices Maximum with repeater; 6,250 ft
(1,905 m) Maximum Length (Bus Topology)
Local 10k ohm Negative Temperature Coefficient (NTC) Thermistor
-40.0°F/-40.0°C to 122.0°F/ 50.0°C in 0.5° Increments
40.0°F/4.5°C to 90.0°F/32.0°C
54.0°F/12.0°C to 100.0°F/38.0°C
±0.9F°/±0.5C° at 70.0°F/21.0°C Typical Calibrated
® Networked Heat Pump Thermostat Installation Instructions
ORKS
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