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Model
CS-TZ20TKEW CS-TZ25TKEW CS-TZ35TKEW CS-TZ42TKEW CS-MTZ16TKE CU-TZ20TKE CU-TZ25TKE CU-TZ35TKE CU-TZ42TKE
Pages
127
Size
23.23 MB
Type
PDF
Document
Service Manual
Brand
Device
Air Conditioner / AIR CONDITIONER
File
cs-tz20tkew-cs-tz25tkew-cs-tz35tkew-cs-tz42tkew-cs.pdf
Date
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Panasonic CS-TZ20TKEW / CS-TZ25TKEW / CS-TZ35TKEW / CS-TZ42TKEW / CS-MTZ16TKE / CU-TZ20TKE / CU-TZ25TKE / CU-TZ35TKE / CU-TZ42TKE Service Manual ▷ View online

121 
18.4.24    F95 (Outdoor High Pressure Protection: Cooling or Soft Dry) 
Malfunction Decision Conditions 
  During operation of cooling or soft dry, when outdoor unit heat exchanger high temperature data is detected by 
the outdoor unit heat exchanger thermistor. 
 
Malfunction Caused 
  Outdoor heat exchanger temperature rise due to short-circuit of hot discharge air flow. 
  Outdoor heat exchanger temperature rise due to defective of outdoor fan motor. 
  Outdoor heat exchange temperature rise due to defective outdoor heat exchanger thermistor. 
  Outdoor heat exchanger temperature rise due to defective of outdoor unit PCB. 
 
Troubleshooting 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
122 
18.4.25    F96 (IPM Overheating) 
Malfunction Decision Conditions 
  During operating of cooling and heating, when IPM temperature data (100°C) is detected by the IPM temperature 
sensor. 
Multi Models only 
o  Compressor Overheating: During operation of cooling and heating, when the compressor OL is activated. 
o  Heat Sink Overheating: During operation of cooling and heating, when heat sink temperature data (90°C) is 
detected by the heat sink temperature sensor. 
 
Malfunction Caused 
  IPM overheats due to short circuit of hot discharge air flow. 
  IPM overheats due to defective of outdoor fan motor. 
  IPM overheats due to defective of internal circuitry of IPM. 
  IPM overheats due to defective IPM temperature sensor. 
Multi Models Only 
o  Compressor OL connector poor contact. 
o Compressor 
OL 
faulty. 
 
Troubleshooting 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
123 
18.4.26    F97 (Compressor Overheating) 
Malfunction Decision Conditions 
  During operation of cooling and heating, when compressor tank temperature data (112°C) is detected by the 
compressor tank temperature sensor. 
 
Malfunction Caused 
  Faulty compressor tank temperature sensor 
  2/3 way valve closed 
 Refrigerant 
shortage 
(refrigerant leakage) 
  Faulty outdoor unit PCB 
 Faulty 
compressor 
 
Troubleshooting 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
124 
18.4.27    F98 (Input Over Current Detection) 
Malfunction Decision Conditions 
  During operation of cooling and heating, when an input over-current (X value in Total Running Current Control) is 
detected by checking the input current value being detected by current transformer (CT) with the compressor 
running. 
 
Malfunction Caused 
 Excessive 
refrigerant. 
  Faulty outdoor unit PCB. 
 
Troubleshooting 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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