DOWNLOAD Panasonic CS-TZ20TKEW / CS-TZ25TKEW / CS-TZ35TKEW / CS-TZ42TKEW / CS-MTZ16TKE / CU-TZ20TKE / CU-TZ25TKE / CU-TZ35TKE / CU-TZ42TKE Service Manual ↓ Size: 23.23 MB | Pages: 127 in PDF or view online for FREE

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
PREV: Panasonic CS-BE25TKE / CU-BE25TKE / CS-BE35TKE / CU-BE35TKE / CS-BE50TKE / CU-BE50TKE / CS-TE20TKEW / CU-TE20TKE / CS-TE25TKEW / CU-TE25TKE / CS-TE35TKEW / CU-E35TKE / CS-TE42TKEW / CU-TE42TKE / CS-TZ20TKEW / CU-TZ20TKE / CS-TZ25TKEW / CU-TZ25TKE / CS-TZ35TKEW / CU-TZ35TKE / CS-TZ42TKEW / CU-TZ42TKE / CS-TZ50TKEW / CU-TZ50TKE Service Manual / Supplement

Panasonic CS-TZ20TKEW / CS-TZ25TKEW / CS-TZ35TKEW / CS-TZ42TKEW / CS-MTZ16TKE / CU-TZ20TKE / CU-TZ25TKE / CU-TZ35TKE / CU-TZ42TKE Service Manual ▷ View online

113 
18.4.16    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. 
 
 
Troubleshooting 
YES 
NO
When abnormality indication starts again 
Turn power supply on and operate fan. 
Replace fan motor.
For safety reason and to prevent
component breakdown, always switch
 off the power before remove and
connect the component.
Caution
Does fan rotate smoothly?
Turn off power supply and rotate fan by
hand.  
Does it rotate?
CN-MTR2
(WHT)
IC19
3
5
1
10
14
16
W
U
V
FAN MOTOR
MS
CN-MTR1
PCB BOARD
5
4
3
2
1
C173
5V
R105
1k
C176
0.01μ
50V
G5
R111
1k
C177
0.01μ
50V
G5
R120
1k
C175
0.01μ
50V
G5
G5
+
YES 
NO
YES 
Turn off power supply and 
disconnect fan motor CN-MRT2 
Check resistance of the motor. 
Measure at fan motor connector
CN-MRT1 (1-2, 1-3, 2-3).  
Replace outdoor PCB.
NO
Replace fan motor.
YES
NO
U
W
V
Replace fan motor.
Replace fan motor.
NO
Replace outdoor PCB.
Stop the fan motor
YES
Is the resistance normal?
Check the rotation feedback output from  
fan motor’s CN-MTR1 output.
Rotate the fan motor manually (by hand)
while measure the voltage at PCB’s      
CN-MRT1
-
Between 1(+) and 5(-)
-
Between 2(+) and 5(-)
-
Between 3(+) and 5(-)
Use an inverter check to check on 
the power transistor on board. 
Do all 6 LED light turn ON and turn 
OFF periodically?
Does the voltage at each terminal
becomes 5 and 0Vdc repeatedly?
Connect it to PCB’s CN-MRT2 port.
Turn power ON and run the unit.
connector.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
114 
18.4.17  H98 (Error Code Stored in Memory and no alarm is triggered / no TIMER LED 
flashing) 
Malfunction Decision Conditions 
  Indoor high pressure is detected when indoor heat exchanger is detecting very high temperature when the unit is 
operating in heating operation. 
  Phenomena: unit is stopping and re-starting very often in heating mode 
 
Malfunction Caused 
  Indoor heat exchanger thermistor 
  Clogged air filter or heat exchanger 
  Over-bent pipe (liquid side) 
 
Troubleshooting 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
115 
18.4.18    H99 (Indoor Freeze Prevention Protection: Cooling or Soft Dry) 
Error Code will not display (no Timer LED blinking) but store in EEPROM 
 
Malfunction Decision Conditions 
  Freeze prevention control takes place (when indoor pipe temperature is lower than 2°C) 
 
Malfunction Caused 
  Air short circuit at indoor unit 
  Clogged indoor unit air filter 
  Dust accumulation on the indoor unit heat exchanger 
  2/3 way valve closed 
  Faulty indoor unit fan motor 
 Refrigerant 
shortage 
(refrigerant leakage) 
  Clogged expansion valve or strainer 
  Faulty indoor pipe temperature sensor 
  Faulty indoor unit PCB 
 
Troubleshooting 
 
 
 
 
 
 
 
116 
18.4.19    F11 (4-way Valve Switching Failure) 
Malfunction Decision Conditions 
  When indoor heat exchanger is cold during heating (except deice) or when indoor heat exchanger is hot during 
cooling and compressor operating, the 4-way valve is detected as malfunction. 
 
Malfunction Caused 
  Indoor heat exchanger (pipe) thermistor 
  4-way valve malfunction 
 
Troubleshooting 
 
 
 
* Check gas side pipe – for hot gas flow in cooling mode 
 
 
 
 
 
 
 
Page of 127
Display

Click on the first or last page to see other CS-TZ20TKEW / CS-TZ25TKEW / CS-TZ35TKEW / CS-TZ42TKEW / CS-MTZ16TKE / CU-TZ20TKE / CU-TZ25TKE / CU-TZ35TKE / CU-TZ42TKE service manuals if exist.

RANDOM: