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Rzp125dv 1 mfg no 3po856023a l4 code up checked the thermistor all ok dont wont to change the board on invertor dont seem to get on very well with daikin boards any possible other faults to check first? Old unit should come of the wall but need to keep it rolling ta charlie
few things o check-
Activation of fin thermal switch
Faulty fin thermistor
High outside air temperature
Insufficient cooling of inverter radiation fin
Blocked suction opening
Dirty radiation fin
Faulty outdoor inverter PC board
Ah,
There is another thing that Daikin don't mention in their manuals...
We have had this happening on a few of the RZPs and what we have found working is to replace the heat transfer paste between the board and the heat sink.
Just take the board off as if you were to replace it, clean the 2 surfaces really well getting rid of all the old paste then apply the new paste and clamp it all back together again.
(Heat transfer paste is about £2 from places like Maplin)
:cool:
.
thanks guys the unit does not run that long before l4 comes up and the heat sink dont even get that hot so i am presumeing its a bad board thanks for input guys
OK,
May I suggest that you before you order the new board reread my post above as what you are describing is the classical symptom of hardened heat transfer paste...
:cool:
ok worth a go thanks for your input will give it a go
fitted a good board to get rid of l4 and even got the paste as suggested was going to make sure it ran ok then fit the old board it runs for about a hr and now brings up l9 code any ideas apart from the comp?
L9
Outdoor Unit LED
Display
A
5 1 4 2 4 3 4 4 4
Applicable
Models
RZP71~140D
Method of
Malfunction
Detection
Malfunction is detected by converting the current flowing to power transistor into voltage with
CT1 (DC current sensor).
Inverter PC board detects the disorder of position signal.
Malfunction
Decision
Conditions
When compressor overload (except for when startup) is detected
When position signal is disordered
Supposed
Causes
Faulty compressor (lock)
Pressure differential startup
Faulty inverter
The stop valve is left in closed.
looks like the compressor