1. The APW3++ with 10 connectors can power either the S9 or the L3+. It is fine for both models. It can only power one miner. For the S9 it needs 220V power source.
Please find the specifications of APW3+ from the link below:
2. The APW3++ with 18 connectors can power either the S9 or the L3+, too. It is fine for both models. It can only power one S9 miner with 220V power source. For the L3+ it needs 220V power source to power two, it could only power one L3+ with 110V power source.
3. A twelve months’ warranty is provided starting from the ship-out date. To avail this warranty a Repair ticket must be generated by the customer on Bitmain's website. Overclocking the miner will void the warranty immediately.
The following events will void the warranty:
a. Customer removes/replaces any components by himself without receiving permission from Bitmain first;
b. Damage caused by poor power cable, lightning or voltage surges.