Help Page for Boiler Control 291
Control Memory Error
Hardware Fault
Hot Tank Short Error
Hot Tank Open Error
Cold Tank Short Error
Cold Tank Open Error
Hot Heat Pump Return Short Error
Hot Heat Pump Return Open Error
Cold Heat Pump Return Short Error
Cold Heat Pump Return Open Error
Mix 1 Sensor Short Error
Mix 1 Sensor Open Error
Mix 2 Sensor Short Error
Mix 2 Sensor Open Error
Mix 3 Sensor Short Error
Mix 3 Sensor Open Error
Domestic Hot Water Sensor Short Error
Domestic Hot Water Sensor Open Error
Transfer Sensor Short Error
Transfer Sensor Open Error
Outdoor Sensor Short Error
Outdoor Sensor Open Error
tekmar Net Outdoor Sensor Error
Internet Outdoor Sensor Error
Expansion Communication Error
Heat Pump Expansion 5 to 8 Lost Error
Heat Pump Expansion 9 to 12 Lost Error
Heat Pump Expansion 13 to 16 Lost Error
Mix 1 Expansion Lost Error
Mix 2 Expansion Lost Error
Mix 3 Expansion Lost Error
Mix 1 Configuration Error
Mix 2 Configuration Error
Mix 3 Configuration Error
tN4 Bus 1 Error
tN4 Bus 2 Error
tN4 Bus 3 Error
tN4 Bus 4 Error
tN4 Bus Duplicate Master Error
tN4 Boiler Control Lost Error
tN4 Device [bus number: device number] Lost Error
tN4 Device [bus number: device number] Error
Unsupported tN4 Device
Ethernet Disconnected Error
Wi-Fi Invalid Password Error
Wi-Fi Invalid SSID Error
DHCP Address Error
Internet Unavailable Error
Nexa Error
Hot Tank No Heat Alert
Cold Tank No Cool Alert
Tank No Heat Alert
Tank No Cool Alert
Hot Tank High Temperature Alert
Hot Tank Low Temperature Alert
Cold Tank High Temperature Alert
Cold Tank Low Temperature Alert
Tank High Temperature Alert
Tank High Temperature Alert
Mix 1 High Temperature Alert
Mix 1 Low Temperature Alert
Mix 2 High Temperature Alert
Mix 2 Low Temperature Alert
Mix 3 High Temperature Alert
Mix 3 Low Temperature Alert
Heat Pump Service Hours Alert
Boiler Service Hours Alert
Heat Pump Service Cycles Alert
BoilerServiceCyclesAlert
Control Memory Error
A memory error has been detected. The control will not operate the boilers until all settings have been reviewed. You may also reload factory defaults and use the Setup Wizard to configure the control. If the memory error keeps recurring after a power outage, the control may require replacement. Consult technical support for assistance.
Hardware Fault
The main MCU detected a problem with a peripheral such as memory, Wi-Fi radio or Thread radio.
Hot Tank Short Error
A short circuit is detected on the hot tank temperature sensor input. The control uses the hot heat pump return sensor to operate the heat pumps until this fault is corrected.
To correct, remove the wires from the hot tank sensor terminals, then use an electrical multimeter to measure the resistance. The resistance should be proportional to the temperature lookup table in the Installation and Operation Manual. Check the wires for damage. If the wires are ok, then replace.
Hot Tank Open Error
An open circuit is detected on the hot tank temperature sensor input. The control uses the hot heat pump return sensor to operate the heat pumps until this fault is corrected.
To correct, remove the wires from the hot tank sensor terminals, then use an electrical multimeter to measure the resistance. The resistance should be proportional to the temperature lookup table in the Installation and Operation Manual. If the resistance is open circuit, check the wires for loose wiring connections. If the wires are ok, then replace the Universal Sensor 082. Once the fault is corrected, the error clears automatically.
Cold Tank Short Error
A short circuit is detected on the cold tank temperature sensor input. The control uses the cold heat pump return sensor to operate the heat pumps until this fault is corrected.
To correct, remove the wires from the cold tank sensor terminals, then use an electrical multimeter to measure the resistance. The resistance should be proportional to the temperature lookup table in the Installation and Operation Manual. Check the wires for damage. If the wires are ok, then replace the Universal Sensor 082. Once the fault is corrected, the error clears automatically.
Cold Tank Open Error
An open circuit is detected on the cold tank temperature sensor input. The control uses the cold heat pump return sensor to operate the heat pumps until this fault is corrected.
To correct, remove the wires from the cold tank sensor terminals, then use an electrical multimeter.
Hot Heat Pump Return Short Error
A short circuit is detected on the hot heat pump return temperature sensor input. The control uses the hot tank sensor to operate the heat pumps until this fault is corrected.
To correct, remove the wires from the hot tank return sensor terminals, then use an electrical multimeter to measure the resistance. The resistance should be proportional to the temperature lookup table in the Installation and Operation Manual. Check the wires for damage. If the wires are ok, then replace the Universal Sensor 082. Once the fault is corrected, the error clears automatically.
Hot Heat Pump Return Open Error
An open circuit is detected on the hot tank return temperature sensor input. The control uses the hot heat pump sensor to operate the heat pumps until this fault is corrected.
To correct, remove the wires from the hot heat pump return sensor terminals, then use an electrical multimeter to measure the resistance. The resistance should be proportional to the temperature lookup table in the Installation and Operation Manual. If the resistance is open circuit, check the wires for loose wiring connections. If the wires are ok, then replace the Universal Sensor 082. Once the fault is corrected, the error clears automatically.
Cold Heat Pump Return Short Error
A short circuit is detected on the cold heat pump return temperature sensor input. The control uses the cold tank sensor to operate the heat pumps until this fault is corrected.
To correct, remove the wires from the cold tank return sensor terminals, then use an electrical multimeter to measure the resistance. The resistance should be proportional to the temperature lookup table in the Installation and Operation Manual. Check the wires for damage. If the wires are ok, then replace the Universal Sensor 082. Once the fault is corrected, the error clears automatically.
Cold Heat Pump Return Open Error
An open circuit is detected on the cold tank return temperature sensor input. The control uses the cold heat pump sensor to operate the heat pumps until this fault is corrected.
To correct, remove the wires from the cold heat pump return sensor terminals, then use an electrical multimeter to measure the resistance. The resistance should be proportional to the temperature lookup table in the Installation and Operation Manual. If the resistance is open circuit, check the wires for loose wiring connections. If the wires are ok, then replace the Universal Sensor 082. Once the fault is corrected, the error clears automatically.
Mix 1 Sensor Open Error
A short circuit is detected on the mix temperature sensor input located on the Mix 1 Expansion. The control will not operate the mixing system until this fault is corrected.
To correct, remove the wires from the mix sensor terminals, then use an electrical multimeter to measure the resistance. The resistance should be proportional to the temperature lookup table in the Installation and Operation Manual. Check the wires for damage. If the wires are ok, then replace the Universal Sensor 082. Once the fault is corrected, the error clears automatically.
Mix 1 Sensor Short Error
An open circuit is detected on the mix temperature sensor input located on the Mix 1 Expansion. The control will not operate the mixing system until this fault is corrected.
To correct, remove the wires from the mix sensor terminals, then use an electrical multimeter to measure the resistance. The resistance should be proportional to the temperature lookup table in the Installation and Operation Manual. If the resistance is open circuit, check the wires for loose wiring connections. If the wires are ok, then replace the Universal Sensor 082. Once the fault is corrected, the error clears automatically.
Mix 2 Sensor Open Error
A short circuit is detected on the mix temperature sensor input located on the Mix 2 Expansion. The control will not operate the mixing system until this fault is corrected.
To correct, remove the wires from the mix sensor terminals, then use an electrical multimeter to measure the resistance. The resistance should be proportional to the temperature lookup table in the Installation and Operation Manual. Check the wires for damage. If the wires are ok, then replace the Universal Sensor 082. Once the fault is corrected, the error clears automatically.
Mix 2 Sensor Short Error
An open circuit is detected on the mix temperature sensor input located on the Mix 2 Expansion. The control will not operate the mixing system until this fault is corrected.
To correct, remove the wires from the mix sensor terminals, then use an electrical multimeter to measure the resistance. The resistance should be proportional to the temperature lookup table in the Installation and Operation Manual. If the resistance is open circuit, check the wires for loose wiring connections. If the wires are ok, then replace the Universal Sensor 082. Once the fault is corrected, the error clears automatically.
Mix 3 Sensor Open Error
A short circuit is detected on the mix temperature sensor input located on the Mix 3 Expansion. The control will not operate the mixing system until this fault is corrected.
To correct, remove the wires from the mix sensor terminals, then use an electrical multimeter to measure the resistance. The resistance should be proportional to the temperature lookup table in the Installation and Operation Manual. If the resistance is open circuit, check the wires for loose wiring connections. If the wires are ok, then replace the Universal Sensor 082. Once the fault is corrected, the error clears automatically.
Mix 3 Sensor Short Error
An open circuit is detected on the mix temperature sensor input located on the Mix 3 Expansion. The control will not operate the mixing system until this fault is corrected.
To correct, remove the wires from the mix sensor terminals, then use an electrical multimeter to measure the resistance. The resistance should be proportional to the temperature lookup table in the Installation and Operation Manual. If the resistance is open circuit, check the wires for loose wiring connections. If the wires are ok, then replace the Universal Sensor 082. Once the fault is corrected, the error clears automatically.
Domestic Hot Water Sensor Short Error
A short circuit is detected on the domestic hot water temperature sensor input. The control will not heat the domestic hot water tank until this fault is corrected.
To correct, remove the wires from the DHW sensor terminals, then use an electrical multimeter to measure the resistance. The resistance should be proportional to the temperature lookup table in the Installation and Operation Manual. If the resistance is short circuit, check the wires for damage. If the wires are ok, then replace the Universal Sensor 078. Once the fault is corrected, the error clears automatically.
Domestic Hot Water Sensor Open Error
An open circuit is detected on the domestic hot water temperature sensor input. The control will not heat the domestic hot water tank until this fault is corrected.
The DHW sensor is optional and the setting incorrectly turned on. Check if a sensor is installed. If not installed, set DHW Sensor to off. If installed, remove the wires from the DHW sensor terminals, then use an electrical multimeter to measure the resistance. The resistance should be proportional to the temperature lookup table in the Installation and Operation Manual. If the resistance is open circuit, check the wires for loose wiring connections. If the wires are ok, then replace the Universal Sensor 078. Once the fault is corrected, the error clears automatically.
Transfer Sensor Short Error
A short circuit is detected on the transfer temperature sensor input. The control will not operate the boiler loop until this fault is corrected.
To correct, remove the wires from the Transfer sensor terminals, then use an electrical multimeter to measure the resistance. The resistance should be proportional to the temperature lookup table in the Installation and Operation Manual. If the resistance is short circuit, check the wires for damage. If the wires are ok, then replace the Universal Sensor 078. Once the fault is corrected, the error clears automatically.
Transfer Sensor Open Error
An open circuit is detected on the transfer temperature sensor input. The control will not operate the boiler loop until this fault is corrected.
To correct, remove the wires from the Transfer sensor terminals, then use an electrical multimeter to measure the resistance. The resistance should be proportional to the temperature lookup table in the Installation and Operation Manual. If the resistance is open circuit, check the wires for damage. If the wires are ok, then replace the Universal Sensor 078. Once the fault is corrected, the error clears automatically.
Outdoor Sensor Short Error
A short circuit is detected on the outdoor air temperature sensor input. The control will attempt to use the outdoor temperature from a tekmarNet system or from the Internet. If this is not available, the control operates the heating and cooling system at the heating and cooling design temperatures until this fault is corrected.
To correct, remove the wires from the outdoor air sensor terminals, then use an electrical multimeter to measure the resistance. The resistance should be proportional to the temperature lookup table in the Installation and Operation Manual. If the resistance is short circuit, check the wires for damage. If the wires are ok, then replace the Outdoor Sensor 070. Once the fault is corrected, the error clears automatically.
Outdoor Sensor Open Error
An open circuit is detected on the outdoor air temperature sensor input. The control will attempt to use the outdoor temperature from a tekmarNet system or from the Internet. If this is not available, the control operates the heating and cooling system at the heating and cooling design temperatures until this fault is corrected.
To correct, remove the wires from the outdoor air sensor terminals, then use an electrical multimeter to measure the resistance. The resistance should be proportional to the temperature lookup table in the Installation and Operation Manual. If the resistance is open circuit, check the wires for loose wiring connections. If the wires are ok, then replace the Outdoor Sensor 070. Once the fault is corrected, the error clears automatically.
tekmar Net Outdoor Sensor Error
The control has not received an outdoor temperature report from the tekmarNet network. The control will attempt to use the outdoor temperature from the Internet. If this is not available, the control operates the heating and cooling system at the heating and cooling design temperatures until this fault is corrected.
Check the tekmarNet network for the location of the outdoor sensor measurement. Check the sensor for open or short circuits and replace the Outdoor Sensor 070 if necessary. Once the fault is corrected, the error clears automatically.
Internet Outdoor Sensor Error
The control has not received an outdoor temperature report from the Internet. Please check that your Router is not blocking Port 443. Please contact an IT professional if assistance is required.
Expansion Communication Error
The control has lost communication to all Heat Pump Expansion and/or Mix Expansion. All expansion controls will not operate until this error is corrected.
To correct, check the expansion communication wires +, -, and Gnd on both the control and expansion to ensure the wire polarity is correct, the wire insulation is stripped, and the wire terminals are tight.
Heat Pump Expansion 5 to 8 Lost Error
The control has lost communication to the Heat Pump Expansion operating heat pumps 5 to 8. Heat pumps 5 through 8 will not operate until this error is corrected.
To correct, check that the expansion power light is on. If the power light is off, use an electrical multimeter to check the power line and neutral terminals for 115 V(ac). If the expansion power light is on, then check the expansion communication wires +, -, and Gnd on both the control and expansion to ensure the wire polarity is correct, the wire insulation is stripped, and the wire terminals are tight.
Heat Pump Expansion 9 to 12 Lost Error
The control has lost communication to the Heat Pump Expansion operating heat pumps 9 to 12. Heat pumps 9 through 12 will not operate until this error is corrected.
To correct, check that the expansion power light is on. If the power light is off, use an electrical multimeter to check the power line and neutral terminals for 115 V(ac). If the expansion power light is on, then check the expansion communication wires +, -, and Gnd on both the control and expansion to ensure the wire polarity is correct, the wire insulation is stripped, and the wire terminals are tight.
Heat Pump Expansion 13 to 16 Lost Error
The control has lost communication to the Heat Pump Expansion operating heat pumps 13 to 16. Heat pumps 13 through 16 will not operate until this error is corrected.
To correct, check that the expansion power light is on. If the power light is off, use an electrical multimeter to check the power line and neutral terminals for 115 V(ac). If the expansion power light is on, then check the expansion communication wires +, -, and Gnd on both the control and expansion to ensure the wire polarity is correct, the wire insulation is stripped, and the wire terminals are tight.
Mix 1 Expansion Lost Error
The control has lost communication to the Mix 1 Expansion. The Mix 1 Expansion outputs will not operate until this error is corrected.
To correct, check that the expansion power light is on. If the power light is off, use an electrical multimeter to check the power line and neutral terminals for 115 V(ac). If the expansion power light is on, then check the expansion communication wires +, -, and Gnd on both the control and expansion to ensure the wire polarity is correct, the wire insulation is stripped, and the wire terminals are tight.
Mix 2 Expansion Lost Error
The control has lost communication to the Mix 2 Expansion. The Mix 2 Expansion outputs will not operate until this error is corrected.
To correct, check that the expansion power light is on. If the power light is off, use an electrical multimeter to check the power line and neutral terminals for 115 V(ac). If the expansion power light is on, then check the expansion communication wires +, -, and Gnd on both the control and expansion to ensure the wire polarity is correct, the wire insulation is stripped, and the wire terminals are tight.
Mix 3 Expansion Lost Error
The control has lost communication to the Mix 3 Expansion. The Mix 3 Expansion outputs will not operate until this error is corrected.
To correct, check that the expansion power light is on. If the power light is off, use an electrical multimeter to check the power line and neutral terminals for 115 V(ac). If the expansion power light is on, then check the expansion communication wires +, -, and Gnd on both the control and expansion to ensure the wire polarity is correct, the wire insulation is stripped, and the wire terminals are tight.
Mix 1 Configuration Error
There is a configuration error with Mix 1. The alert is cleared when Mix 1 Expansion is detected, Mix 1 is enabled and one of tN4 Bus is assigned to Mix 1.
Mix 2 Configuration Error
There is a configuration error with Mix 2. The alert is cleared when Mix 2 Expansion is detected, Mix 2 is enabled and one of tN4 Bus is assigned to Mix 2.
Mix 3 Configuration Error
An error occurs when the Backup Type is set to Boiler Loop and a Mix 3 Expansion is detected on the expansion bus. This configuration is not permitted.
tN4 Bus 1 Error
Communication has been lost on tN4 Bus 1. Check the tN4, C and R wires for each tN4 device. Check the polarity of the C and R wires. Check for loose or broken wires. The error message self clears once the error condition is corrected.
tN4 Bus 2 Error
Communication has been lost on tN4 Bus 2. Check the tN4, C and R wires for each tN4 device. Check the polarity of the C and R wires. Check for loose or broken wires. The error message self clears once the error condition is corrected.
tN4 Bus 3 Error
Communication has been lost on tN4 Bus 3. Check the tN4, C and R wires for each tN4 device. Check the polarity of the C and R wires. Check for loose or broken wires. The error message self clears once the error condition is corrected.
tN4 Bus 4 Error
Communication has been lost on tN4 Bus 4. Check the tN4, C and R wires for each tN4 device. Check the polarity of the C and R wires. Check for loose or broken wires. The error message self clears once the error condition is corrected.
tN4 Bus Duplicate Master Error
Two tekmarNet buses are connected together which causes a communication failure.
To correct, remove all tekmarNet wiring and reconnect one device at a time.
tN4 Boiler Control Lost Error
The tekmarNet communication to the boiler control is lost.
To correct, ensure that there is power to the lost boiler control. Trace the wires from the control to the lost boiler control looking for loose or damaged wires. The error message self clears when the error condition is corrected. If the tN4 device is deliberately removed, go to the Reset menu and press tekmarNet Device Reset.
tN4 Device [bus number: device number] Lost Error
Communication is lost to tekmarNet device with this address.
To correct, ensure that there is power to the lost device. Trace the wires from the control to the lost device looking for loose or damaged wires. The error message self clears when the error condition is corrected. If the tN4 device is deliberately removed, go to the Reset menu and press tekmarNet Device Reset.
tN4 Device [bus number: device number] Error
A tN4 thermostat or device with this address has an error that requires corrective action. Locate the tN4 device and troubleshoot using the device’s Installation and Operating Manual.
Unsupported tN4 Device
An unsupported tN4 device is connected to tekmarNet communication network. This may include the Mixing Expansion Modules 440, 441, and 444. The error will clear automatically one this device is removed.
Ethernet Disconnected Error
The Ethernet is not connected to a network. Check the Ethernet cable connection to the control and the Router or Switch. Check that the Router or Switch is powered on and operating correctly.
Wi-Fi Invalid Password Error
The Wi-Fi Password was not accepted. Please check that the password was entered correctly. If necessary, please reconfigure your Wi-Fi network.
Wi-Fi Invalid SSID Error
The Wi-Fi network could not be found. Please check that the Wi-Fi network name was entered correctly and that the Router signal is medium to high strength. If necessary, please reconfigure your Wi-Fi network.
DHCP Address Error
The router has not assigned the control an IP address. Please check the router’s configuration settings and ensure that the DHCP server is enabled and enough IP addresses are available. Please contact an IT professional for assistance.
Internet Unavailable Error
The control is unable to communicate to the Watts cloud through the Internet. The error will automatically clear once Internet communications are established. You may also set the Internet Connection Type to Off to clear the error.
To correct:
- Check the control’s Internet DNS 1 and DNS 2 settings
- Check that the router firewall is not blocking or filtering MAC addresses
- Check that the router firewall is not blocking outbound port 23
Nexa Error
The control is unable to connect to the Nexa app. Please check that your router is not blocking outbound ports 443 or 8883. Please contact an IT professional for assistance.
Hot Tank No Heat Alert
The hot tank temperature did not increase within the heat pump alert time. There is likely a mechanical failure with either a heat pump or circulator that requires immediate attention. The control operates normally while this alert is present.
To reset the alert, press the ‘X’ button to dismiss the error message on the home screen.
Cold Tank No Cool Alert
The cold tank temperature did not decrease within the heat pump alert time. There is likely a mechanical failure with either a heat pump or circulator that requires immediate attention. The control operates normally while this alert is present.
To reset the alert, press the ‘X’ button to dismiss the error message on the home screen.
Tank No Heat Alert
The tank temperature did not increase within the heat pump alert time. There is likely a mechanical failure with either a heat pump or circulator that requires immediate attention. The control operates normally while this alert is present.
To reset the alert, press the ‘X’ button to dismiss the error message on the home screen.
Tank No Cool Alert
The tank temperature did not decrease within the heat pump alert time. There is likely a mechanical failure with either a heat pump or circulator that requires immediate attention. The control operates normally while this alert is present.
To reset the alert, press the ‘X’ button to dismiss the error message on the home screen.
Hot Tank High Temperature Alert
The hot tank temperature exceeded the hot tank high temperature alert threshold. There is likely a mechanical failure with either a heat pump or circulator that requires immediate attention. The control operates normally while this alert is present.
The alert clears when the hot tank temperature falls 2°F (1°C) below the hot tank high temperature alert threshold.Hot Tank Low Temperature Alert
The hot tank temperature fell below the hot tank low temperature alert threshold. There is likely a mechanical failure with either a heat pump or circulator that requires immediate attention. The control operates normally while this alert is present.
The alert clears when the hot tank temperature rises 2°F (1°C) above the hot tank low temperature alert threshold.
Cold Tank High Temperature Alert
The cold tank temperature exceeded the cold tank high temperature alert threshold. There is likely a mechanical failure with either a heat pump or circulator that requires immediate attention. The control operates normally while this alert is present.
The alert clears when the cold tank temperature falls 2°F (1°C) below the cold tank high temperature alert threshold.
Cold Tank Low Temperature Alert
The cold tank temperature fell below the cold tank low temperature alert threshold. There is likely a mechanical failure with either a heat pump or circulator that requires immediate attention. The control operates normally while this alert is present.
The alert clears when the cold tank temperature rises 2°F (1°C) above the cold tank low temperature alert threshold.
Tank High Temperature Alert
The tank temperature exceeded the tank high temperature alert threshold. There is likely a mechanical failure with either a heat pump or circulator that requires immediate attention. The control operates normally while this alert is present.
The alert clears when the tank temperature falls 2°F (1°C) below the tank high temperature alert threshold.Tank High Temperature Alert
The tank temperature fell below the tank low temperature alert threshold. There is likely a mechanical failure with either a heat pump or circulator that requires immediate attention. The control operates normally while this alert is present.
The alert clears when the tank temperature rises 2°F (1°C) above the tank low temperature alert threshold.
Mix 1 High Temperature Alert
The mix 1 temperature exceeded the mix 1 high temperature alert threshold. There is likely a mechanical failure with either a heat pump, boiler, valve or circulator that requires immediate attention. The control operates normally while this alert is present.
The alert clears when the mix 1 temperature falls 2°F (1°C) below the mix 1 high temperature alert threshold.
Mix 1 Low Temperature Alert
The mix 1 temperature fell below the mix 1 low temperature alert threshold. There is likely a mechanical failure with either a heat pump, boiler, valve or circulator that requires immediate attention. The control operates normally while this alert is present.
The alert clears when the mix 1 temperature rises 2°F (1°C) above the mix 1 low temperature alert threshold.
Mix 2 High Temperature Alert
The mix 2 temperature exceeded the mix 2 high temperature alert threshold. There is likely a mechanical failure with either a heat pump, boiler, valve or circulator that requires immediate attention. The control operates normally while this alert is present.
The alert clears when the mix 2 temperature falls 2°F (1°C) below the mix 2 high temperature alert threshold.
Mix 2 Low Temperature Alert
The mix 2 temperature fell below the mix 2 low temperature alert threshold. There is likely a mechanical failure with either a heat pump, boiler, valve or circulator that requires immediate attention. The control operates normally while this alert is present.
The alert clears when the mix 2 temperature rises 2°F (1°C) above the mix 2 low temperature alert threshold.Mix 3 High Temperature Alert
The mix 3 temperature exceeded the mix 3 high temperature alert threshold. There is likely a mechanical failure with either a heat pump, boiler, valve or circulator that requires immediate attention. The control operates normally while this alert is present.
The alert clears when the mix 3 temperature falls 2°F (1°C) below the mix 3 high temperature alert threshold.
Mix 3 Low Temperature Alert
The mix 3 temperature fell below the mix 3 low temperature alert threshold. There is likely a mechanical failure with either a heat pump, boiler, valve or circulator that requires immediate attention. The control operates normally while this alert is present.
The alert clears when the mix 3 temperature rises 2°F (1°C) above the mix 3 low temperature alert threshold.
Heat Pump [X] Service Hours Alert
The heat pump run time has exceeded the recommended heat pump service hours alert interval. Once maintenance has been completed, the service interval can be reset in the heat pump status screen.
Boiler Service Hours Alert
The boiler run time has exceeded the recommended boiler service hours alert interval. Once maintenance has been completed, the service interval can be reset in the boiler status screen.
Heat Pump [X] Service Cycles Alert
The heat pump has exceeded the recommended heat pump service cycles. Once maintenance has been completed, the service interval can be reset in the heat pump status screen.
Boiler Service Cycles Alert
The boiler has exceeded the recommended boiler service cycles. Once maintenance has been completed, the service interval can be reset in the boiler status screen.