Hello

Does anyone here know why the mode symbol (heating symbol in this case) would flash on a PARF27MEA, groups and units have been addressed properly.

This is a standard 2 pipe I fitted back in 2010, 6 units in 6 groups on the system but three are flashing heat symbol and not running. Come on for a while and then stop. Ran for a while OK when I switched off and back on and re-addressed units.

No Standby.

No fault codes.

Just flashing heat symbol and not running?

Thanks