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29
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'14 • KX-SM-221
(iv) Demand control
Demand ratio can be switched with the dip switches (SW4-7, 4-8) on the outdoor PCB.
SW4-7, SW4-8 demand switching: 0 – Open, 1 – Short-circuit (Factory default is open)
SW4-7 SW4-8
Compressor
Out put(%)
0 0 80
1 0 60
0 1 40
1 1 0
(v) The controls of 4-way valve safeguard, compressor protective start operation, defrost operation, oil equalized
operation, oil return operation, pump-down operation for replacement, Start/Stop pump-down operation and check
operation have priority over this control.
(vi) CnS1 performs the following operations depending on the short circuited or open of the jumper wire (J13).
In the case of pulse input, the pulse width is 500ms or larger.
➀
J13 – Short-circuit
ON (Short-circuit) ON (Short-circuit) OFF (Open)
Normal Normal
CnS1 input
Remote control operation
Remote control display
Air-conditioner operation/stop
OFF OFF OFF
Demand control
Remote
Compressor Demand
Compressor Demand
ON ON
PUSH PUSH PUSH PUSH
➁
J13 - Open
OFF OFF
ON ON
Demand control
Demand control
CnS1 input
Remote control operation
Remote control display
Air-conditioner operation/stop
Remote
Compressor Demand
Compressor Demand
PUSH PUSH PUSH PUSH
(c) Demand control from indoor unit
(i) Starting condition
①
When a demand ratio (“80%”, “60%”, “40%” or “0%”) has been transmitted from an indoor unit of “Peak-cut
timer” function.
②
Normal demand of Item (b) is not activated.
③
This control is performed on the RC-EX1A remote control.
(ii) Contents of control
①
Compressor’s upper limit speed is restricted according to the demand restriction rate.
②
The demand ratio controlled by the restriction rate which is transmitted from an indoor unit.
③
If the demand control rate signals are received from two or more indoor units, the control takes the lowest rate.
④
When the demand rate is other than 0%, the controls of 4-way valve safeguard, defrost operation, oil return opera
-
tion, oil equalized operation, pump-down operation for replacement, Start/Stop pump-down operation and check
operation have a priority over this control.
(iii) Ending condition
When the starting conditions have been lost.
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