Maslow is not receiving AC mains power
If the yellow MAINS light (indicated by the lightning bolt icon) is flashing it means that the Maslow unit is not receiving mains power.
In the first instance check that your home is receiving mains power by switching ON an AC load (i.e. a load plugged into the mains power and not powered via the Maslow's DC network). If there is no mains power then the Maslow will run from battery until the battery state of charge falls to 20% whereupon the Maslow will disconnect the DC network to conserve power. If after a further six hours the mains power has still not returned turn OFF the Maslow (see the Knowledge Base article How do I turn off my Maslow?) until the power returns.
If there is mains power check the switch in the Fused Connection Unit (FCU) to which the Maslow is connected is set to ON. Your Maslow should have been installed using a FCU with a built-in mains indicator light which should be glowing.
If the FCU switch is ON but the built-in mains indicator light is not glowing - or there is no built-in mains indicator light - it is possible that either the fuse in the FCU has blown or that the relevant Miniature Circuit Breaker (MCB) in the Consumer Unit (also known as Fuse Box) has tripped OFF.
Check that the MCB supplying the Maslow is set to ON. If it is OFF then it is possible that a fault has caused it to trip. Try switching it ON again and if it trips contact Maslow Customer Support (see Further help below). Leave the MCB switched OFF.
Check also that the fuse in the FCU supplying the Maslow is good. This can be done either by replacing it with a known good fuse of exactly the same type and rating, checking continuity using a resistance meter or temporarily placing it in the plug of another appliance that is known to be working. If it is faulty it is possible that a fault has caused it to blow. Try replacing it and if it blows again immediately switch OFF the Maslow by operating the FCU switch into the OFF position and contact Maslow Customer Support (see Further help below). Leave the FCU switched OFF.
If the FCU switch is ON and the built-in mains indicator light is glowing it is possible that your Maslow has developed a fault. Turn OFF the Maslow (see the FAQ article How do I turn off my Maslow?) and contact Maslow Customer Support (see Further help below).
Further help
To raise a support ticket send an email with subject "no mains power: <your name or unit serial number>" to our support address:
Last updated: 24 Mar 2015