Panasonic CS-RZ35WKRW Service Manual

Also see for CS-RZ25WKRW: Operating instructions

13018.4.6 H19 (Indoor Fan Motor – DC Motor Mechanism Locked)Malfunction Decision Conditions The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor(feedback of rotation > 2550 rpm or < 50 rpm).Malfunction Caused Operation stops due to short circuit inside the fan motor winding. Operation stops due to breaking of wire inside the fan motor. Operation stops due to breaking of fan motor lead wires. Operation stops due to Hall IC malfunction. Operation error due to faulty indoor unit PCB.TroubleshootingTurn off power supply and rotate fan by hand.When abnormality indication starts again.Replace fan motor.Does fan rotate smoothly?Turn power supply on and operate fan.Does it rotate?Check the rotation feedback output from fan motor.Operate the fan motor, is the rotation feedbackvoltage ~8.0 Vdc (pin 6 & 4) generated?Turn off power supply and disconnect fan motor connector,then turn power on.Check the output of fan motor from indoor PCB.Is the motor power supply voltage 310~340 Vdc (pin 1 & 4)generated?Is the motor control voltage 14.6~17.0 Vdc (pin 5 & 4)generated?Operate the fan, is the rotation command voltage 3~5 Vdc(pin 7 & 4) generated?NONONONONONOYESYESYESYESFor safety reason and to preventcomponent breakdown, always switchoff the power before remove andconnect the component.Replace indoor PCB.Replace fan motor.