View Full Version : wire Pump safety cut off on splits fuj.

16-08-2013, 06:37 PM
Good evening.
I want to go back to the practice of using the cut off pump microswitch to shut down split aircon in event of a pump fault.
What is the best way to find a suitable place on pc board to wire to?
This instance is on Fujitsu AUY24 cassette, but need to be doing this on asy9 to 24 wallmounts, and cassettes auy14 to auy 45

We allways ask customer to install separate power for pump.
As the pump microswitch wires are combined with the power wires seems like the manufacturers are encouraging us to use the aircon supply, which ive never liked as.. 1. need be fused at 5 amps, and 2. manufacturers still claim the noise on shared neutral will cause faults.
Interested in your opinion on this as well, as ive been to sooo many installations working fine wired this way by others.

install monkey
16-08-2013, 07:01 PM
for the wall mounts switch the live into the indoor- if pump cannot shift condensate quick enough then it will drop the supply to the indoor- if pump does clear the hi float alarm then the indoor will restart and cool after its start delay- with the cassettes u could break the hi limit float switch on the internal lift pump, but please stick a dyno label stating that the alarm contacts will stop the unit- and ur power supply can be down rated to 3 amp at the spur