I've noticed there is a couple of HVAC engineers on here, I have a Fujitsu Inverter heat pump, model - ABTA18LATN (indoor unit), AOTA18LACL (outdoor unit), it intermittently stops and flashes a fault code, either - timer light (green) 2 flashes, then Power light (red) 5 flashes, or, - green and red 2 flashes together, then a further 5 flashes from the red light. It is possible that I have the colour of the flashes the wrong way around so take that into consideration as well, you know, the numpty factor. Any ideas/help would be greatly appreciated, thanks, Dave.
Make a note of the exact combination of flashes and whether they are fast flash or slow. Then check out google led flash codes for your model and they'll point you in the right direction. But more then likely you'll have to call an engineer out. I used to service Lennox boilers in Auckland and they had the same system, although more mechanical and less electronic........
OK, Red is the power indicator light, Green is the timer light, so, 1st the Timer light flashes twice, (maybe with the Power light? but it may just be light transference from the Timer light?) then the Power light flashes a further 5 times, each flash is on/off in about a second. It then stops for about 10 - 20 seconds and repeats. I've tried looking online but can't find anything for my model. I would guess it is code 25, but am not sure. @AirCon @grimmy66
This model is unique to PAC RIM and AU/NZ. Forget the colours as these change from month to month, model to model (e.g. multi headed systems use green for power and singles use Red). Based on the UK model ABYG18-24LV A common problem is a data error between inside and outside. Try powering it down for at least 20 minutes. That's power off outside and inside. IF it persists, then check the data cable (3) from one end to the other. If it goes through any switches or isolators, by pass them. A simple reset clears it. Last time it was a thunder storm. I tried pasting the error code table, but it didn't work. I've sent you the service manual for the UK version of the same machine. It's heavy in places and assumes prior knowledge. Once you've found which code it is get back to me. 14. ERROR CODES If you use a wired type remote controller, error codes will appear on the remote controller display. If you use a wireless remote controller, the lamp on the photo detector unit will output error codes by way of blinking patterns. Sorry I cannot cut n paste? . Error display Wired remote controller Error code Description OPERATION lamp (green) TIMER lamp (orange) ECONOMY lamp (green) ●(1) ●(1) ◊ Serial communication error ●(1) ●(2) ◊ Wired remote controller communication error ●(1) ●(5) ◊ Check run unfi nished ●(2) ●(1) ◊ R.C. address or Refrigerant circuit address setting error [Simultaneous Multi] ●(2) ●(2) ◊ Indoor unit capacity error ●(2) ●(3) ◊ Combination error ●(2) ●(4) ◊ • Connection R.C. address error (indoor secondary unit) [Simultaneous Multi] • Connection R.C. address error (indoor unit or branch unit) [Flexible Multi] ●(2) ●(7) ◊ Primary unit, secondary unit setup error [Simultaneous Multi] ●(3) ●(1) ◊ Power supply interruption error ●(3) ●(2) ◊ Indoor unit PCB model information error ●(3) ●(5) ◊ Manual auto switch error ●(4) ●(1) ◊ Room temp. sensor error ●(4) ●(2) ◊ Indoor unit Heat Ex. Middle temp. sensor error ●(5) ●(1) ◊ Indoor unit fan motor error ●(5) ●(3) ◊ Drain pump error ●(5) ●(7) ◊ Damper error ●(5) ●(15) ◊ Indoor unit error ●(6) ●(2) ◊ Outdoor unit main PCB model information error or communication error ●(6) ●(3) ◊ Inverter error ●(6) ●(4) ◊ Active fi lter error, PFC circuit error ●(6) ●(5) ◊ Trip terminal L error ●(6) ●(10) ◊ Display PCB microcomputers communication error ●(7) ●(1) ◊ Discharge temp. sensor error ●(7) ●(2) ◊ Compressor temp. sensor error ●(7) ●(3) ◊ Outdoor unit Heat Ex. liquid temp. sensor error ●(7) ●(4) ◊ Outdoor temp. sensor error ●(7) ●(5) ◊ Suction Gas temp. sensor error ●(7) ●(6) ◊ • 2-way valve temp. sensor error • 3-way valve temp. sensor error ●(7) ●(7) ◊ Heat sink temp. sensor error ●(8) ●(2) ◊ • Sub-cool Heat Ex. gas inlet temp. sensor error • Sub-cool Heat Ex. gas outlet temp. sensor error ●(8) ●(3) ◊ Liquid pipe temp. sensor error ●(8) ●(4) ◊ Current sensor error ●(8) ●(6) ◊ • Discharge pressure sensor error • Suction pressure sensor error • High pressure switch error ●(9) ●(4) ◊ Trip detection ●(9) ●(5) ◊ Compressor rotor position detection error (permanent stop) ●(9) ●(7) ◊ Outdoor unit fan motor1 error ●(9) ●(8) ◊ Outdoor unit fan motor 2 error ●(9) ●(9) ◊ 4-way valve error ●(9) ●(10) ◊ Coil (expansion valve ) error ●(10) ●(1) ◊ Discharge temp. error ●(10) ●(3) ◊ Compressor temp. error ●(10) ●(4) ◊ High pressure error ●(10) ●(5) ◊ Low pressure error ●(13) ●(2) ◊ Branch boxes error [Flexible Multi] Display mode ● : 0.5s ON / 0.5s OFF ◊ : 0.1s ON / 0.1s OFF ( ) : Number of fl ashing
I'll put me leathers on and fill up the PP. @NZDave please can you send me your post code. I want to see how he grows that lovely moustache. Don't get to see many like that these days.
Cheers @AirCon , I'll give the switch off inside/outside units trick a go in the next couple of days, on shift at the moment so no time until next days off, will get back in touch then, thanks very much for the help so far .
