Daikin L4 fault

[snow_man]

Hi we have a RMX140JVMC system that’s going out on L4 fault .Daikin have told us to change 2 boards which we have done and the fault is still there .Any suggestions to get the system to run ?

[TrickyRikki]

Hi we have a RMX140JVMC system that’s going out on L4 fault .Daikin have told us to change 2 boards which we have done and the fault is still there .Any suggestions to get the system to run ?

on the 2 pcb's you replaced did they come with the thermal paste already on them? if not did you add the thermal paste.
Also did the boards come with a new fin thermistor? if not did you replace the thermistor?

[kanchi]

ttp://acforest.starfree.jp/daikin-sky/ec/L4.htm
This site is in Japanese.
I wish I could serve you

[Liveba]

Hi we have a RMX140JVMC system that’s going out on L4 fault .Daikin have told us to change 2 boards which we have done and the fault is still there .Any suggestions to get the system to run ? geometry dash meltdown

It may be due to an error in increasing the temperature of the inverter's radiation blades. Fin temperature increases due to short circuit.