I have just updated my firmware to 2.1.3 and i can not get the master stations to work. I set station 1 as a master, when station 2 comes on it also shows the master is running on the LCD but there is no power at the connection terminal for station 1, the same thing happens if i set station 1 as master 2. If i set station 1 as a regular zone, it runs fine.
Hmm, this is not a known problem (especially since the LCD shows master station is on). Note that the latest firmware is 2.1.4, which has been available since a few weeks ago.