Carrier 42TGV0131CP Service Manual

7-1. Indoor Controller Block Diagram7-1-1. Connection of Wired (Simple) Remote ControllerSchedule timerWired (simple) master remote controller (Max. 2 units)P.C. board(WP-035)Signal receiving unit for wireless remote controller (Option)Outdoor unitOutdoor unit321321321Up to 8 units are connectable. ∗1∗1 However Max.8 units are connectable incase of mounting “1:1 model” connection interfacewhen two wired (simple) remote controllers areconnected.∗2 The “1:1 model” connection interface is mountedto only 1 unit.“1:1 model” connection interface is mountedto the header unit.∗3 Connection of the schedule timer to the simpleremote controller is unavailable.Same as left∗2#3(Follower)A BA BSame as left∗2#2(Follower)A BDC5VDC5VIndoor unit#1 (Header)Indoor control P.C. board (MCC-1643)LouvermotorDrainpumpIndoorfan motorCPUDriverDC12VDC5VDC20VOutsideoutputRemote controllercommunication circuitDisplay LCD Function setupKey switchCN2CN1∗3CPUDisplay LEDDisplay LCD LCD driverCPURemote controllercommunication circuitFunction setupKey switchPower circuitPower circuitDC280VFan motorcontrol circuitEEPROMTA sensorTC sensorTCJ sensorFloat inputHARunWarningDefrostThermo. ONCOOLHEATFANSerial send/receive circuitACsynchronoussignal input circuitPowercircuitSecondarybatteryOutdoor unit3217. INDOOR CONTROL CIRCUITFILE NO. SVM-19024- 34 -