Daikin UAA220-ST3M - Page 34

56 | P a g e
No.
Signal
Signal type
Remarks
1
Error signals
Passive dry
contact output
Used to output error signals. See Figure 1.
2
Pump control output
Passive dry
contact output
Used to control pump output. See Figure 2 and
Figure 3.
3
Water flow switch
Passive dry
contact input
Used to detection water flow. See Figure 4.
4
Remote ON/OFF
Passive dry
contact input
Used to remotely turn ON/OFF the unit. See
Figure 5.
5
Error signals from #1
Passive dry
contact output
Used to output error signals from #1. See Figure
6.
6
Error signals from #2
Passive dry
contact output
Used to output error signals from #2. See Figure
7.
7
Unit ON/OFF signal
Passive dry
contact output
Used to indicate unit ON/OFF status. See Figure
8.
Remarks:
• Unit operation signals come from pump operation signals. If M3(401)
and M3(402) are connected to the external pump contactor, unit
operation signals come from the normally open contact of the pump
contactor.
• To remotely turn on/off the unit, switch Q0 on the control cabinet must
be closed, connect M3(58) and M3(59) to a remote switch, and remove
the short-circuit jumper between M3(58) and M3(59).
• The contact for error and pump output bears a maximum voltage of
230VAC. If the pump contactor uses a coil that works at 380V, the
voltage must be converted. See Figure 3.