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Our Carrier air con 38qpa18-9 shows error RO1 code 42 when we turn it on. The outdoor unit isn't working either. Tried resetting at the mains box and worked for 15 minutes now not working.

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Posted on Jan 02, 2017

  • 86 Answers

SOURCE: through the wall HAIER air con

model no
capacity of a/c
need to solve yr problem

Posted on Mar 17, 2008

  • 215 Answers

SOURCE: how to repair Samsung AQV 12 FAN Air Conditioner

You can turn off the Thermostat, and the powers switch on the furnance and turn the breaker off in the breaker box wait about 20 - 30 minutes and turn the breaker back on, and the power to the furance back on and the thermostat, this should reset the system.






Melvin
St Louis

Posted on Oct 04, 2009

  • 288 Answers

SOURCE: Have a mistral air con, outside unit not working

there is no fuse on your condensing unit outside. pull the disconnect to kill the power to the unit and take off the removable panel above the 2 service valves. there will be an oval shaped capacitor that is marked herm and fan. there will be a rupture disc on the top that may have ruptured. also inspect the low voltage wiring(will still be hot unless you turn off the switch at your furnace). this low voltage wire operates a magnetic coil on the bottom of the contactor that closes a high voltage circuit to the fan and compressor.

Posted on Dec 15, 2009

  • 6 Answers

SOURCE: air con indoor unit is flashing 6 times out door is off

Please specify the make and model of your unit.
If this is a LG inverter model.
The six flashes of the indoor unit light indicates a CH 06 alarm.
This alarm state indicates that the indoor unit pipe temperature sensor has measured a temperature out of range or the unit is protecting itself from this low temp state. Indoor unit coil temperature to low. Should it have reached a temperature of -5°C for longer that 30sec it will switch the machine off.

It could indicate that the unit refrigerant charge is too low or the sensor has gone out of calibration.

It should measure 5kΩ @ 25°C

Posted on Mar 22, 2010

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I just installed a Carrier Mini-Split and am getting an E2 error code. I have already replaced both boards in the outdoor unit IMP and Main PC with no luck. Any suggestions?


This is a Zero crossing detection error. This is alarm signal when the main chip can't detect over zero signal. When such failure occurs, the main control board must have fault.

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What sort of machine is it? Refrigerated, Ducted, Gas? To do a full reset correctly, you must switch off at the main isolator next to the unit or at the meter box and leave it off for at least 15 minutes. A quick on / off does not reset it properly. If the unit is a refrigerated split system , and the outdoor is running but the machine is not blowing cold outside and hot inside (On heating mode) It could be due to a gas leak / shortage.

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Is unit still under warranty? If so call manufacturer And request new board and is there a board for outdoor unit? If so, get one of those too. Tell them U will return unused parts. replace outdoor board first and check. replace indoor board and test.

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What must we do to rectify an F8 fault?


I went to the roof and turned the unit off, waited a minute and turned it back on and the unit worked fine after that. It was a power failure that messed ours up.

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I have a samsung split system it's just shows error 6 and dosen't work .. It's the perpendicular style.. Please answer my question ...


Fault code. 6. From what I have read 1 of 2 items. The unit has completely lost freon charge. Or 2, outdoor has overheating problem, ie. condenser fan motor not running

Aug 01, 2013 | Heating & Cooling

1 Answer

I have a question about a Carrier Air conditioner. It's an outside unit and it's old. When I turn the air on the air blows from the inside heater/air unit upstairs in the wall. Outside the air con ...


Could be just a blown fuse or circuit breaker. Fuses are generally located close to the unit in a small box on the side of the house. You will have to flip the box open to find the fuses. It may have a cartridge you have to pull out. Fuses are not visibly bad, you have to check them with an ohm meter or sometimes a hardware store can check them for you. Otherwise you will have to buy two and just replace them both.
The circuit breakers are usually in the house along with all the other breakers in a main panel. There will be two breakers and will probably be visibly tripped. Just flip them all the way back and forward to reset

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1 Answer

Had a short power outage now the unit will not run. breaker ok and 234 volts to outside unit but inside unit will not come on. is there a reset or something


Try turning the unit off at thye meter box or the isolator switch out next to the outdoor unit of the air con. Leave off for 15 minutes and then switch back on again. Some Air cons get screwed up with power surges... Leaving off at the mains for a while often resets them. If the air con was running at the time the power went off, it may have damaged one of the electronic boards... Do you get any flashing lights or displays showing what could be an error code ??

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P8 showing on air cond and air con is not working


P8-Abnormality in outdoor unit.

Solution:
1) Check the indoor/outdoor connecting wire in proper point.
2) Change the connection of electric wiring, if reversed phase.
3) Check the protection device, if malfunction, replace it.
4) Measure the resistance of the outdoor coil thermistor.
If the resistance is normal, replace the
outdoor controller board
Thanks.

Feb 05, 2011 | Mitsubishi Mr. Slim MXZ30TN Air...

1 Answer

42 degrees outside and air conditioner is blowing hot air!!


turn the unit off at the main circuit breaker or isolating switch, to reset the unit it has tripped out on its high pressure safety. to stop this problem happening on 42 plus days hose down outdoor coil with water

Jan 29, 2009 | Heating & Cooling

2 Answers

Carrier air conditioner


Sounds like you either blew a transformer, have a bad circuit breaker or blew the main fuse in the outside disconnect. If the indoor unit is still blowing air (no matter what temperature) start looking at the power supply to the outdoor unit. From the circuit breaker, the power will go to a small box located within a few feet from the outside unit. This box will have either a lever on the side or you will be able to open the box and pull out the fuses. From this box the power goes to the condensor. The first thing you should do is to turn off the breaker to the outside unit. Flip it back on and if you have a call for cooling, after about 3 minutes the outdoor unit should start. If it does not, shut off power again to the unit by switching off the breaker, go outside and pull out the fuses in the disconnect box. Using a multi meter, check for continuity thru the fuses. If you have continuity, call your technician. If one or both fuses show no sign of continuity, replace the fuse(s). Make sure that the thermostat is working and sending a signal to the indoor air handler. You may be able to check this by turning the fan switch to "Fan" and see if the blower turns on. You may just have a bad thermostst. Caution should be used anytime you are near electrical components. If you do not have the skill-set required to test electrical equipment, leave it to a proffessional.

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