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I installed 2 units 1 of the units is blowing air from the inside but fan on outside unit will not kick on checked wireing every thing looks ok, can't be weather cause one unit works fine tried to jump wires to turn fan on automatically now nothing works any ideas thanks
Check for errors like blinking indoor light if present. Reset the error by disconnecting power supply from the unit for 10 sec. and "on" the unit. If the error persist, some parts of the unit may be defective and need to replace. Like room air thermistor, coil thermistor in the indoor side or the relay board. Some safety device in the outdoor may give in, some outdoor parts may be defective. You need a qualified technician for the this problem.
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I have a Fujitsu Split unit inverter with a second evaporator in the attic. I am not impressed with them. I have found that disconnecting the power at the mains for a couple of hours, either with the breaker switches off, or the outside isolator effects a good power reset. If you listen at the outside condenser unit, you will hear clicks and rattles as it goes through a test procedure. Don't switch on for 15 minutes.
Hottest weeks of the year and the vent on the inner high level unit fails to open! :>(
Check for fan operation by turning the fan control at the thermostat to "on". If the fan blows, it works. If not, check a circuit breaker or fuse.
If the fan blows when forcing it on with the thermostat but not in automatic, check the fan control circuit in the air handler. Danger: high voltage, beware! There should be a system wiring diagram inside the air handler somewhere.
There are two things you can check outside before calling a service technician. The first is the breaker to the outside unit. There is a breaker or disconnect near the unit. If there is nothing wrong with the electrical supply, check the refrigerant level. If the level is low, the pressure switch will cut off power to the compressor to protect it from damage. DO NOT try to recharge the compressor yourself.
Communication error between indoor to out door.Comms Error, check your wiring, remove external pumps. Split/Multi - check volts from terminal N to 3 = 0 - 65 Vdc, Multi V - 4 Vdc terminals 3 and 4
I have run into this with the LG brand systems. try shutting power off to the outdoor unit to reset all units. If problem persists, it could have to do with a charge level of refrigerant (freon) or possibly a failed control board.
On the outdoor unit the fan should not be running, on the indoor unit the fan should be running. If you then check the outdoor unit with fan not running, you should be able to hear clearly that the compressor is actually working. If this is all correct, it is possible that your fourway reverse valve is seeping and needs to be replaced.
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