Panasonic S-200PE2E5 Technical Data & Service Manual

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Panasonic S-200PE2E5 Technical Data & Service Manual Manual pdf 96 page image

4-104Outdoor Unit Control PCB (ACXA73-04770, ACXA73-04750)Explanation of FunctionsA. ADD pin (2P, Black) Auto address setting pin• Short-circuit this pin for 1 second or longer to automatically set theaddresses at the indoor units that are connected to that outdoor unit andare within the same system.• The system address is "0" at the time of shipment. Auto address settingis necessary even for communications lines in a single system where theinter-unit control wiring does not cross to any other systems.• While auto address setting is in progress, the 2 LEDs (LED1, 2: Red) onthe outdoor unit control PCB blink alternately. (Short-circuiting this pinwhile auto address setting is in progress will stop the auto address settingoperation.)SW2Rotary switch(10 positions, Yellow) Outdoor system address setting switch• The setting is "0" at the time of shipment. It is not necessary to changethe setting if wiring is connected only to an outdoor unit and indoor unitsin a single system and the inter-unit control wiring does not cross multiplesystems.• If wiring links the inter-unit control wiring for multiple systems to the samecommunications lines, then a different address must be set for eachrefrigerant tubing system.• If wiring links multiple systems, a maximum of 30 systems (up to 64 indoorunits) can be connected. This setting can be set up to "39," howevercontrol will be for 30 systems even if the setting is set to higher than 30.An alarm will be displayed if system addresses are duplicated.(For details, see Table 4-1.)SW1DIP switch(2P, Black) Switches for setting system address 10s digit and 20s digit• If 10 systems or more are set, the setting is made by a combination of thisDIP switch and SW2.• If 10 - 19 systems are set, set switch 1 (10s digit) to ON.• If 20 - 29 systems are set, set switch 2 (20s digit) to ON, and set switch 1(10s digit) to OFF.• If 30 systems are set, set both switch 1 (10s digit) and switch 2 (20s digit)to ON.(For details, see Table 4-1.)PUMP DOWN (2P, Black) Refrigerant recovery Pin• Short circuit this pin to perform refrigerant recovery control using coolingoperation. The indoor unit fan will operate at HIGH and 60Hz for a maximumof 10 minutes When refrigerant recovery is completed, close the valvesand open circuit this pin to stop the operation.LED 1LED 2(D302)(D303)LED (red × 2)• LED 1 and 2 blink alternately while automatic address setting is in progress.• Display the alarm contents for alarms that are detected by the outdoor unit.RUN (2P, Black) Start pin• Short-circuit this pin and apply a pulse signal to start all indoor units in thatrefrigerant system.Stop (2P, Black) Stop pin• Short-circuit this pin and apply a pulse signal to stop all indoor units in thatrefrigerant system.Mode change (3P, Black) Indoor unit Heating/Cooling mode change pin• Short-circuiting this pin during ordinary operation changes the mode fromCooling to Heating (if the current mode is Cooling) or from Heating toCooling (if the current mode is Heating).Test (2P, Black) • This pin is used to test the PCB at the factory.• When the power is turned ON after this pin has been short-circuited, alloutput signals will be output in sequence. (Sequential output does notoccur if this pin is short-circuited when the power is already ON.) Releasingthis pin returns the unit to normal control.CHK (2P, Black) • Short-circuit during the test run operation.• Open the circuit after the test run.