SERVICE MANUAL - BVT Partners OÜ

(u)(v)'11 • SCM-SM-110Operation permission/prohibition(In case of adopting card key switches or commercially available timers)When the indoor function setting of wired remote controller for “Operation permission/prohibition” is changed from “Invalid(Factory default)” to “ Valid”, following control becomes effective.1 Optional2XR1CnT 3XR2BlueCard key412V XR3XR5 switch5XR46XR5Normal operationOperation permission/prohibition mode(Factory default)“Valid” (Local setting)ON OFF ON OFFCnT-6Operation Operation prohibitionOperationStoppermission*1 (Unit stops)*1 Only the “LEVEL INPUT” is acceptable for external input, however when the indoor function setting of“Level input (Factory default)” or “Pulse input” is selected by the function for “External input” of the wired remotecontroller, operation status will be changed as follows.In case of “Level input” setting In case of “Pulse input” settingUnit operation from the wiredUnit starts operationremote controller becomes*(2)available*(1)*(1) In case that “Operation permission/prohibition mode” setting is “Valid” and “External input” setting is “Levelinput (Factory default)”;1 When card key switch is ON (CnT-6 ON: Operation permission), start/stop operation of the unit from thewired remote controller becomes available.2 When card key switch is OFF (CnT-6 OFF: Operation prohibition), the unit stops operation in conjunctionwith OFF signal, and start/stop operation of the unit from the wired remote controller becomes not available.*(2) In case that “Operation permission/prohibition mode” setting is “Valid” and “External input” setting is “Pulseinput (Local setting)”;1 When card key switch is ON (Operation permission), the unit starts operation in conjunction with ON signal.and also start/stop operation of the unit from the wired remote controller becomes available.2 When card key switch is OFF (Operation prohibition), the unit stops operation in conjunction with OFF signal, andstart/stop operation of the unit from the wired remote controller becomes not available.(3) This function is invalid only at “Center mode” setting done by central controller.External input/output control (CnT)Be sure to connect the wired remote controller to the indoor unit. Without wired remote controller remote operation by CnT isnot possible to perform.1 Optional1Operation output(CnT-2: XR1)2XR12Heating output(CnT-3: XR2)CnT 3XR2Blue3Thermostat ON output (CnT-4: XR3)412V XR34Error output(CnT-5: XR4)5XR45Remote operation input (CnT-6: No-voltage contactor)6XR51) Output for external control (remote display)Following output connectors (CnT) are provided on the indoor control PCB for monitoring operation status.1 Operation output: Outputs DC12V signal for driving relay during operation2 Heating output: Outputs DC12V signal for driving relay during heating operation3 Thermostat ON output: Outputs DC12V signal for driving relay when compressor is operating.4 Error output: Outputs DC12V signal for driving relay when anomalous condition occurs.