As this has been more or less sorted, so for future reference: The PIKO Central Station is particularly fussy about voltage levels.
The H Bridge circuit will cut out if more than 22 volts is detected as an input voltage, hence the solid RED light, does not usually cause major damage, the "detect and sense voltage circuit" operates in milliseconds, which usually in all but exceptional cases prevents permanent damage to other circuits on the PCB.
Central stations purchased up to around 2014, were solidly built, from thence to the introduction of the upgraded PCB around the second half of 2016, they were somewhat indifferent in their reliability, quality control issues and cheaper lower quality components were often the reasons cited for failure.
For the inquisitive types, the casing contains an awful lot of "air" and very little in the gubbins department.
For transformers for more than 22 volts as the PIKO recommended one, a method will have to be used to reduce the output voltage down to 22 volts, either by using a "diode string" often used as a work round to reduce track voltages particular for those operating the smaller scales. Due to the PIKO amperage output, 5 amp diodes will have to be used.
Another method is to use a DC to DC step down converter, search for "buck converter" again a fairly heavy duty one will be needed.
For those who like to tinker, depending on the transformer, altering the DC taps to produce the required 22 volts.
