If Demand Stoppage pins (Pins #1 and #2 on CN18) is short circuited when outdoor unit is operating, the compressor and
indoor fan motor of will be shut down, while the wire controller will stay in its original mode and shutdown code "10" will be
displayed at the same time. In such case, if these pins are reset, the previous operation will be resumed.
(3) Input outdoor unit fan start-up/shutdown (4) : (Snow sensor)
During shutdown of compressor, when Snow sensor pins are PCB of outdoor unit is short circuited, all outdoor fan motors
will operate in full speed. If compressor operates, these fans will operate in normal speed. If these pins are opened, these
fans will stop operation. This function can prevent outdoor unit from being covered by snow.
(4) Input demand current control by 60%, 70%, 80%, and 100% (6, 7, 8, and 9)
If current limit inputs are PCB of outdoor unit are short circuited, compressor frequency will be controlled, and the
maximum operating current of outdoor unit can be set to 60%, 70%, 80%, or 100% of the rated value. When outdoor unit
operating current is higher than the limit as set, indoor unit will be "temperature control OFF" and shutdown code "10" will
be displayed. During control on input current, the equipment will be reset if the inputs are opened.
Power supply
X1
Control Circuit
X1
1
2
1
2
3
3P Connector
Outdoor Unit
PCB1
CN18
SS3
X1: Auxiliary Relay
SS3: Demand Stoppage switch
Power supply
X1
Control Circuit
X1
1
2
1
2
3
3P Connector
Outdoor Unit
PCB1
CN18
SS3
X1: Auxiliary Relay
SS3: Snow sensor switch
X1
X1
1
2
1
2
3
3P Connector
Outdoor Unit
PCB1
CN18
SS
1
Wiring Diagram Example of Demand Current Control
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