Troubleshooting
Heating or cooling does not turn on when the set point is above or below the room temperature
To prevent damaging the compressor, the thermostat inserts a delay when cycling the compressor. If the system should be on and it’s not, then change the set point to be 2 degrees beyond the current set point and wait 5 minutes to see if the system turns on. If not, contact a local HVAC professional.
Heat pump is “cooling when it should be heating” or “heating when it should be cooling”
Some heat pumps use the O terminal, while others use the B terminal. If there is a wire in the O terminal of the ADC-T3000, move it to the B terminal. If the B terminal in the ADC-T3000 has been wired, move it to the O terminal. Contact a local HVAC professional for further help with this issue.
Thermostat buttons flash amber and screen does not illuminate
The batteries in the thermostat are extremely low. Install fresh batteries immediately.
Automatic wiring detection feature is not correctly identifying wires
If the automatic wire detection feature is not correctly identifying the wires, please proceed to bypass the automatic wire detection. Take note of the thermostat’s wiring and configure the thermostat manually.
Note: If configuring the wiring for the first time, proceed to step 7.
- Press the MINUS button.
- Select SETTINGS.
- Select INSTALLER.
- Select CONTINUE.
- Select RECONFIG.
- Select YES.
- Select whether the HVAC system is wired in RH ONLY, RC ONLY, or RH AND RC at the thermostat. Do not include any jumpers at this time. The thermostat will determine if a jumper is needed and add one automatically.
- On the wiring detection screen, select NO. The thermostat will display Check Wiring and Reinstall.
- Select BYPASS and continue through the remaining prompts to manually configure the thermostat.
Note: You will need to know the system type, heat type, and number of stages to complete the installation.
Locating the INSTALLER (setup) menu
The initial setup menu can be accessed at any time.
- Press the **MINUS button.
- Select SETTINGS.
- Select INSTALLER.
Remove the thermostat from the Z-Wave network
Thermostat displays “Safety Delay” on the screen
The thermostat will protect your compressor from short cycling and display “Safety Delay” with a timer on the screen. When the timer expires, the thermostat will automatically resume heating or cooling.
Thermostat displays “System Protect” on the screen
System Protect is a 5-minute delay prior to calling for heating or cooling to protect the system from short cycling. It is only applied if the thermostat has detected an unexpected relay state internal to the thermostat during a call.
System Protect is intended to cover rare cases of power issues with the HVAC system. If System Protect is being seen frequently or appears on every call for heat or cool, it points to poor HVAC performance or pre-existing incompatibility. If System Protect occurs while the thermostat is in cooling mode, and the R wire is in Rh, this may be resolved by moving the R wire to Rc and reconfiguring the thermostat. See Thermostat Reconfiguration.
Frequent or extreme System Protect delays can be resolved by installing an isolation relay.
Thermostat screen doesn’t continuously light up
The thermostat display cannot be lit up indefinitely. See Motion Detected Wake to have the screen light up when a person walks up to the thermostat.
Thermostat displays “Power Resistor Required” on the screen
The customer’s system requires the included power resistor to be installed on the zone valves on their HVAC equipment. See the diagram below for where to install the power resistor between terminals 1 and 2 on Taco valves.
Note: If the included power resistor is misplaced, it can be replaced with a 1000 ohm, 1/2 watt resistor.
Thermostat displays “Isolation relay required” on the screen
The thermostat has detected overcurrent on one or more terminals. To resolve, it is recommended to isolate each of the W, Y, and G wires. Alarm.com recommends the Emerson 90 380 Fan Relay 24 Volt Coil, Contact an HVAC technician if unsure of how to install an insolation relay.
The thermostat isn’t acting as a repeater in the Z-Wave network despite having a common wire
The thermostat is only a repeater when it has been added into the network while it has a common wire connected and powered. If the thermostat receives a common wire after being added to the network, the thermostat will need to be removed and re-added to enable the repeater functionality.
Changing advanced features and settings for the thermostat
Advanced thermostat configurations and features such as outdoor balance point, staging delays, venting (HRV, VRV, and air baffles), and Alarm.com Places require an online account and security panel or gateway. Use the Partner Portal, Customer Website, or Customer app to configure these options.
Resetting the thermostat to factory defaults
The thermostat can be reset back to its factory settings. This will reset all of the HVAC settings, rules, and schedules on the thermostat, and it will also remove the thermostat from the Z-Wave network before performing this reset.
Note: The panel or gateway will be unaware that this procedure was performed, so it is recommended that you follow the process to remove the T3000 from the Z-Wave Network
- Press the MINUS button.
- Select SETTINGS.
- Select INSTALLER.
- Select RESET.