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Model
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
Pages
127
Size
33.93 MB
Type
PDF
Document
Service Manual
Brand
Device
Air Conditioner / AIR CONDITIONER
File
cs-z20tkew-cs-z25tkew-cs-z35tkew-cs-z42tkew-cs-z50.pdf
Date
PREV: Panasonic CS-TZ20TKEW-1 / CS-TZ25TKEW-1 / CS-TZ35TKEW-1 / CU-TZ20TKE-1 / CU-TZ25TKE-1 / CU-TZ35TKE-1 Service Manual

Panasonic 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 Service Manual ▷ View online

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 
 
 
 
 
 
 
 
 
 
 
 
 
122 
18.4.7  H23 (Indoor Pipe Temperature Sensor Abnormality) 
Malfunction Decision Conditions 
  During startup and operation of cooling and heating, the temperatures detected by the indoor heat exchanger 
temperature sensor are used to determine sensor errors. 
 
Malfunction Caused 
 Faulty 
connector 
connection. 
 Faulty 
sensor. 
 Faulty 
PCB. 
 
Troubleshooting 
 
 
 
 
 
 
 
 
 
 
 
 
123 
18.4.8  H27 (Outdoor Air Temperature Sensor Abnormality) 
Malfunction Decision Conditions 
  During startup and operation of cooling and heating, the temperatures detected by the outdoor air temperature 
sensor are used to determine sensor errors. 
 
Malfunction Caused 
 Faulty 
connector 
connection. 
 Faulty 
sensor. 
 Faulty 
PCB. 
 
Troubleshooting 
 
 
 
 
 
 
 
 
 
 
 
124 
18.4.9  H28 (Outdoor Pipe Temperature Sensor Abnormality) 
Malfunction Decision Conditions 
  During startup and operation of cooling and heating, the temperatures detected by the outdoor pipe temperature 
sensor are used to determine sensor errors. 
 
Malfunction Caused 
 Faulty 
connector 
connection. 
 Faulty 
sensor. 
 Faulty 
PCB. 
 
Troubleshooting 
 
 
 
 
 
 
 
 
 
 
Page of 127
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