Panasonic CS-NZ9SKE Service Manual

Also see for CS-NZ12SKE: Operating instructions

Contents

Panasonic CS-NZ9SKE Service Manual Manual pdf 102 page image

10217.4.16 H97 (Outdoor 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.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 outdoor unit PCB.TroubleshootingYESNOWhen abnormality indication starts againTurn power supply on and operate fan.Replace fan motor.For safety reason and to preventcomponent breakdown, always switchoff the power before remove andconnect the component.CautionDoes fan rotate smoothly?Turn off power supply and rotate fan byhand.Does it rotate?CN-MTR2(WHT)IC19351 101416WUVFAN MOTORMSCN-MTR1PCB BOARD54321C1735VR1051kC1760.01μ50VG5R1111kC1770.01μ50VG5R1201kC1750.01μ50VG5G5+YESNOYESTurn off power supply anddisconnect fan motor CN-MRT2Check resistance of the motor.Measure at fan motor connectorCN-MRT1 (1-2, 1-3, 2-3).Replace outdoor PCB.NO Replace fan motor.YESNOUWVReplace fan motor.Replace fan motor.NO Replace outdoor PCB.Stop the fan motorYESIs the resistance normal?Check the rotation feedback output fromfan motor’s CN-MTR1 output.Rotate the fan motor manually (by hand)while measure the voltage at PCB’sCN-MRT1- Between 1(+) and 5(-)- Between 2(+) and 5(-)- Between 3(+) and 5(-)Use an inverter check to check onthe power transistor on board.Do all 6 LED light turn ON and turnOFF periodically?Does the voltage at each terminalbecomes 5 and 0Vdc repeatedly?Connect it to PCB’s CN-MRT2 port.Turn power ON and run the unit.connector.