CS-Z20TKEW, CS-Z25TKEW, CS-Z35TKEW, CS-Z42TKEW, CS-Z50TKEW, CS-Z71TKEW, CS-XZ20TKEW, CS-XZ25TKEW, CS-XZ35TKEW, CS-XZ50TKEW, CU-Z20TKE, CU-Z25TKE, CU-, 35TKE, CU-Z42TKE, CU-Z50TKE, CU-Z71TKE, CU-Z20TKE, CU-Z25TKE, CU-Z35TKE, CU-Z50TKE - Panasonic Air Conditioner Service Manual (repair manual). Page 121

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121 
18.4.6  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.  
 
Troubleshooting 
 
 
 
 
 
 
 
 
 
 
 
 
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