SERVICE MANUAL - BVT Partners OÜ

'11 • SCM-SM-1101.7 External control (remote display) /control of input signal(Refer to the FDTC, FDEN and FDUM series by 31 page)(1) External control (remote display) outputFollowing output connectors (CNT) are provided on the printed circuit board of indoor unit.Note (1) Please install the separately-sold Interface kit (SC-BIK-E). The output connector (CNT) is located on the circuit board of the Interface kit.• Operation output: Power to engage DC 12V relay (provided by the customer) is outputted during operation.• Heating output: Power to engage DC 12V relay (provided by the customer) is outputted during the heating operation.• Compressor OPERATION output: Power to engage DC 12V relay (provided by the customer) is outputted while thecompressor is operating.• MALFUNCTION output: When any error occurs, the power to engage DC 12V relay (provided by the customer) is outputted.(2) Control of input signalControl of input signal (switch input, timer input) connectors (CNT) are provided on the printed circuit board of indoor unit.However, when the operation of air conditioner is under the Center Mode, the remote control by CnT is invalid.(a) Level inputIf the factory settings (Jumper wire J1 EXTERNAL INPUT on the PCB of indoor unit) are set, or “LEVEL INPUT” is selectedin the wired remote control’s indoor unit settings.1) Input signal to CnT OFF → ON Air conditioner ON2) Input signal to CnT ON → OFF Air conditioner OFFONONCnT InputOFFOFFOFF Note (1) The ON with the * mark indicates anON operation using the remote controlONON *ONunit switch, etc.Unit(CASE A)OFFOFFOFFUnit *ONONON(CASE B)OFFOFF(b) Pulse inputWhen Jumper wire J1 on the PCB of indoor unit is cut at the field or “PULSE INPUT” is selected in the wired remote control’sindoor unit settings.Input signal to CnT becomes valid at OFF → ON only and the motion of air conditioner [ON/OFF] is inverted.ONONCnT Input OFFOFFOFFONUnit(CASE A) OFFOFFONONUnit(CASE B)OFF