Fan Coil Unit Thermostat Not Working

I am especially concerned about possible confusion between the fancoil s c terminal fancoil to water control valve and y terminal thermostat to fancoil for water control valve.

Fan coil unit thermostat not working.

Additional issues with the outdoor condensing unit might include a faulty compressor a failing condenser fan motor or a faulty run capacitor. On a further call for cooling the thermostat signals for the fan to speed up from its. It sounds like the relay or control board in the unit is defective the thermostat tells the unit to come on in heat mode after that controls inside the furnace not thermostat should send power to the blower to come on. Now the blower and heat pump should operate but the electric heat will only start when the power is available via the separate.

Check your outdoor unit for signs of water if the fan is still not turning on. Check under the unit and the cold exterior surface of the indoor coil enclosure. Study the wires inside the thermostat. Condensing unit not turning on at all.

The engineering mindset 659 350 views. Choose the red and white wires if you are having problems with. Test to make sure you are getting 24 to 28 volts ac between the g green and c com terminals on you fan center or control board. Fan will not come on in the on position or your fan will not come on when you turn the thermostat down in the air conditioning mode.

If you aren t getting 24 volts between g and c then you might have a thermostat problem a thermostat wire problem or the low voltage fuse on the control board might be blown. If it does not turn the furnace and air conditioner power back off again at the breaker panel. Thermostat equipment for fan coils and ahu s. If your system has frozen up turn off your thermostat for one to three hours to see if it unfreezes.

If there is a circuit breaker for the fan coil unit disconnect the electric heat from this breaker and use a separate breaker for just the heating elements and connect it to power source you want. I want to connect the heat pump and fan coil unit not the electric heat to my generator panel and keep the electric heat on a different circuit how can this be done. How chiller ahu rtu work working principle air handling unit rooftop unit hvac system duration. A the fan coil unit is controlled by a unit mounted controller provided by mechanical systems controls contractor mscc.