Sanyo multi

Have a Sanyo multi with 3 indoor units works fine on heating for a few hours then then the 3 indoors stop heating and start flashing on indoor units check gas pressure all ok Can anyone help there around 10 years old

Model numbers would be a great help.
Also go have a look at two LEDs on outdoor PCB - LED1 & LED2
A good condition, no errors, is that they're both off.
If they're flashing or one's on let us know what's going on - for flashing count how many times LED1 flashes, then same for LED2.
Local wired controllers & system controller should be giving error code (like H31 \ E04 etc)
Look forward to hearing from you
Cheers
Loops

Thanks I will check