Best ACES 2 User Manual page 22

Check your Relays and temperature sensor readings
Manual Switching checks:
Stage 1:
Select the Status menu tab and check that turning on out1, 2, 3, 4 turns on the corresponding relays
(turn off when finished) in the software. Also check that when you manually turn on an output that
the relay board LED comes on for that output (each relay has its own LED).
Stage 2:
Now lets check that the compressor comes on and off with our outputs. Leave outputs 1-4
(depending on number of AC connected) off and monitor for 15 minutes at least that no cold air is
provided via aircon and compressor does not come on. Next switch on all AC outputs 1-4 and
monitor for 15 minutes at least that you can feel cold air and compressor comes on.
If you have an Eniscope installed you can use this to also check when compressor comes on and off
watching the current usage.
If stage 2 is unsuccessful try the below:
1) disconnect the connector for the aircon (JST connector or alike) and measure with a ohm meter
the resistance you see at the end. Check you get your cold and hot resistance readings depending on
the relay switch state. If not check the pot settings at the ACES2 and the cable integrity.
2) If your compressor does not come on when you send the hot signal (output/relay on) try lowing
the resistance by 1kohms. Keep lowering by 1kOhms until it comes on.
3) If your compressor is always on, increase the cold resistance (output/relay off) by 1kohm
increments to a maximum of 45k.
4) If the aircon has a flashing light indicating error, check your connections and resistance settings.
Also note for some aircon models they can detect when a resistance range is to large. For instance if
you set the cold resistance to 25k, try lowering to 16k to see if error stops.
ACES 2019 – User Manual Page 22 of 45