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Wall controller not responding, indoor / outdoor unit operating think cust has altered outdoor dip switches

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

SOURCE: outdoor not workin

the outdoor unit is totally dead or only to the heat mode?if it is to the heat mode propably must check the refrigirator.if it is too the cool mode the plate has problem.if is multi check the outdoor plate in other occasion check the indoor plate.

Posted on Mar 29, 2009

  • 659 Answers

SOURCE: carrier split 42G250HF-1(indoor unit

I'm not sure exactly what unit you have and what controls you have installed on the unit. But....there usually is a flash code schematic on the unit. Usually on the inside of the blower compartment cover. This should tell you what is wrong with the unit. It could have a low voltage short somewhere and is loosing the call for cool. So the answer can be a possible yes to your question but without knowing the flash code, it's hard to tell from my point of view. You might end up calling a service professional out to check it.

Posted on Mar 30, 2009

  • 14 Answers

SOURCE: System will not start up.

This is a signal fault between the indoor and outdoor first make sure the dip switches are set start with the unit closest to the condensor set as unit 1 then next unit as 2 and so on the dip switches are inside the indoor unit on the pc board if you check the manual it will tell you which swithes to set, if this wasnt done when the units where installed they would have never worked i would also check the signal wiring between the wallmount and the splitter box / bc box and make sure there isnt a loose connection when you have ruled this out id say more than likely it is a faulty indoor board on the wallmounted unt

Posted on Apr 08, 2009

  • 1070 Answers

SOURCE: indoor unit does not function -outdoor unit works

These units have circuit boards inside that have lights on them. These lights come on and tell you what the problem is. I have had 4 units do the same thing that yours is doing. The result has been that the compressor has gone bad. You have to get access to the control board to see the lights. There will either be one inside the inside unit or one inside the outside unit depending on exact manufacturer date.
Good luck and hope this helps.

Posted on Aug 23, 2009

shastalaker7
  • 1515 Answers

SOURCE: Hi. I have a failed indoor controler on a hitachi

Hi, the control voltage to both indoor and outdoor will always be 24 volts AC. If this is a heat-pump unit, the high voltage to the indoor and outdoor will be the same, 208/ 230/ 240/ 277. If it is a split unit with a gas fired unit, the outdoor will be 208 or higher and the indoor will be 120volts AC. I'm sorry, you have the inducer motor, so it is gas! My mistake. Yes, always the gas furnace will be 120 volts AC and the remote condenser will always be 208 and higher. As far as replacing the inducer motor with a different kind, it will have to be the same voltage, 120, and amps, R.P.M's, 60hz, and made to pressurize and be able to vent Hot gases also. It must fit and operate like the old one. They should make a replacement universal motor to fit? Check with some of the wholesale houses on this and they can locate a motor to fit. Keep me updated on this please Don.
Shastalaker7

Posted on Dec 19, 2009

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A/C Unit SAMSUNG -Outdoor unit model= MH080FXCA 4A was connected to 3 indoor units:


It's possible you have a bad data wire on one of the systems. Swap the data wire or both if two with a different wire. (1&4--2&3) whatever. Whatever you do inside obviously do outside. Might have extra resistamce that is throwing the error but will be fine for a ground wire.Or do one system at a time, being sure to change your dip switch settings until you figure out the problem unit. Good Luck!!

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This is a "PFC circuit abnormal" in the outdoor unit meaning that the outdoor controller board is faulty. Try turning the machine off at the isolator switch for 10 mins, then back on to see if the error resets. If not you will need a new controller PCB.

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What does blinking light on wall unit mean?


When the Operation lamp is flashing, the unit can't operate efficiently and has shut off. Check and clean the Air Filters. Check that nothing is blocking the air inlet or outlets (on all indoor units (if a multi-unit system) and the outdoor unit). Remove all obstructions. Turn the breaker to Off and then On again. Check if the unit works with the remote.

If you have a multi-unit system, make sure that all indoor units are in the same Operation mode. If the units are on Auto, make sure that all units are set for Heat or Cool.

If the unit continues to have the Operation light flash, then you need to contact your service professional. The Operation manual for the FTXS18HVJU is available here: http://www.daikinac.com/content/assets/DOC/OperationManuals/FTXS15_18_24LVJU%20Operation%20Manual.pdf

I hope this helps.

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My Gree hansol split air conditioner wall mounted model gwh18tc-d3dna1a says it has a "Error U5" what does this mean


U5 Malfunction of current detection for the complete unit. A/C status, During cooling and drying operation, the compressor will stop while indoor fan will operate; During heating operating the complete unit will stop operation. Possible Causes, Therese a circuit malfunction on the outdoor unit control board AP1, replace the outdoor unit control panel AP1.

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Error message U4


Signal transmission error. Indoor and outdoor PCB's cannot communicate. Usually a faulty controller board in the outdoor unit. If the indoor unit otherwise functions normally (can control fan speed, louvres, beeps in replay to all remote buttons) then it is probably OK so check outdoor controller PCB.

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I cant get cooling from my air con,model-emailair WS066H,but I do not have a remote control for it,can i control it manually.


Only in some models, there is an option to operate manual. Check near indoor display. If there is button press it. But you can't change temp setting and mode as you like.So, It's advisable get new remote.

Dec 29, 2010 | Heating & Cooling

1 Answer

The operation and timer lights on my Fujitsu split system are flashing on and off several times when the unit is switched off I noticed this after the system had stopped blowing air & I knew the room...


I have same problem like yours to my newly installed Fujitsu multi-split system (the first time use since system installed 1 week ago). I rang the electrician who did the installation; he said it must be the units themselves nothing to do with electricity.

Okay, then I rang Fujitsu and their local service agent. They suggested me to switch off C/B for an hour to reset the units. I followed the instruction but the indoor units still did not respond to remote control...

It simply looks like no power supply to indoor units (they are hard-wired to the outdoor unit). So I used a multi-meter to test the power terminals of indoor units (Danger! If you have no idea about this, don't even try! ): it seemed no power supply even C/B is on. I turned to the isolator which next to the outdoor unit. The isolator was making arcing noise when I switched it on and off. The indoor units suddenly turned on for few minutes then died again.

So I figured out the problem is that crooked isolator. I called the unhappy electrician to replace the isolator. End story....

I hope my experience will help you a little bit.

Jul 11, 2010 | Fujitsu 24C1 Air Conditioner

1 Answer

Hi. I have a failed indoor controler on a hitachi ducted aircon. mod ras-5hz. inverter. can I replace it with other type. Unit 15 yrs old and parts not available. What is the control voltage between indoor...


Hi, the control voltage to both indoor and outdoor will always be 24 volts AC. If this is a heat-pump unit, the high voltage to the indoor and outdoor will be the same, 208/ 230/ 240/ 277. If it is a split unit with a gas fired unit, the outdoor will be 208 or higher and the indoor will be 120volts AC. I'm sorry, you have the inducer motor, so it is gas! My mistake. Yes, always the gas furnace will be 120 volts AC and the remote condenser will always be 208 and higher. As far as replacing the inducer motor with a different kind, it will have to be the same voltage, 120, and amps, R.P.M's, 60hz, and made to pressurize and be able to vent Hot gases also. It must fit and operate like the old one. They should make a replacement universal motor to fit? Check with some of the wholesale houses on this and they can locate a motor to fit. Keep me updated on this please Don.
Shastalaker7

Dec 18, 2009 | Hitachi Heating & Cooling

1 Answer

System will not start up.


This is a signal fault between the indoor and outdoor first make sure the dip switches are set start with the unit closest to the condensor set as unit 1 then next unit as 2 and so on the dip switches are inside the indoor unit on the pc board if you check the manual it will tell you which swithes to set, if this wasnt done when the units where installed they would have never worked i would also check the signal wiring between the wallmount and the splitter box / bc box and make sure there isnt a loose connection when you have ruled this out id say more than likely it is a faulty indoor board on the wallmounted unt

Jan 27, 2009 | Fujitsu 24C1 Air Conditioner

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