Daikon Ftk25jv1nb fault.

[Michael1234]

Hi, I am new to this forum and I would appreciate it if someone out there can help me.
I have a Daikon Ftk25jv1nb Air Conditioning unit displaying a fault as follow:
1) If I switch the it on, it works perfectly, but only for 10 minutes or so. After that the green power light starts flashing and the unit stops blowing and vents close.
2) If I switch unit off and back on, there is no change, it's green power light continues flashing but the unit does not function.
3) However, If I switch off at the main circuit breaker, wait 30 second and switch on, it will function again, perfectly, for 10 mins or so as per item 1) above, then it stops again.
4) I have done Fault Diagnosis on my remote controller and it indicates fault H8 (CT abnormality) on outside unit is the problem. I have 2 indoor units and both perform the same way.
5) Because of where the outside unit is located, it needs a special high rise platform to get to.
Could someone out there please help. Before I bring in the heavy squad I would like to know how serious this is and what is causing this problem.
Please help, thanks in advance.
Mick.

[Deano240]

When it starts flashing press and hold the cancel button . Then keep pressing the cancel button untill you hear a long beep. This will be the fault code

[Brian_UK]

When it starts flashing press and hold the cancel button . Then keep pressing the cancel button untill you hear a long beep. This will be the fault code

Please read item 4 in the original post.

[al]

If the fault won't reset with main power off then you need it checked, below is part of troubleshooting guide:

6.35 DC Voltage / Current Sensor
Abnormality
Remote
Controller
Display
H8
Method of
Malfunction
Detection
DC voltage or DC current sensor abnormality is
identified based on the compressor running frequency
and the input current.
Malfunction
Decision
Conditions
„ The compressor running frequency is above 52 Hz.
„ If the error repeats, the system is shut down.
„ Reset condition: Continuous run for about 60 minutes
without any other error
Supposed
Causes
„ Defective outdoor unit PCB
Troubleshooting
Replace the outdoor unit PCB.

[Michael1234]

Hi Guys, thank you for the responses.
Re the unit, as per point 3) in my original. To add a further bit of info. I switch off at mains and await 30 seconds then switch back on. I restart the unit and run the fault diagnosis on the remote controller - pressing CANCEL on time section - and I get a long beep on 00 code indicating all OK - IE no fault. However, if I continue to cycle through the list of fault codes, after a few minutes, the long beep comes on H8 as per my original. Shortly after that the unit will fail.
A further bit of info is: the system is 13 years old, is situated in a holiday home in Italy and it gets little use. Only 4 years ago, the outside PCB was replaced, at a cost of 700 euros and it would not have had more than 300 hours use since.
So you can appreciate my concern.
Thanks again in anticipation of your response.
Best Mick.

[Craig Johnston]

13 years old. Probably time for a new system

[Deano240]

Please read item 4 in the original post.

Cheers Brian. Not that I needed to be told that though. I couldn't delete my post. I see it afterwards. But thank you