Check
SiUS041501E
93
Service Diagnosis
5.3
Power Supply Waveforms Check
Check No.11
Measure the power supply waveform between No. 1 and No. 2 on the terminal board, and check
the waveform disturbance.
Check if the power supply waveform is a sine wave (Fig.1).
Check if there is waveform disturbance near the zero-cross (sections circled in Fig.2).
5.4
Electronic Expansion Valve Check
Check No.12
Conduct the followings to check the electronic expansion valve (EV).
1. Check if the EV connector is correctly connected to the PCB.
2. Turn the power off and on again, and check to see if the EV generates a latching sound.
3. If the EV does not generate a latching sound in the above step 2, disconnect the connector and
check the continuity using a multimeter.
4. Check the continuity between the pins 1 - 6, 2 - 6, 3 - 6, and 4 - 6 (between the pins 1 - 5, 2 - 5,
3 - 5, 4 - 5 for the 5P connector models). If there is no continuity between the pins, the EV coil is
faulty.
5. If the continuity is confirmed in step 3, the outdoor unit PCB (main PCB) is faulty.
Fig.1
Fig.2
Harness 5P
6P Connector
(5)
Check
S20
1 - 6
2 - 6
3 - 6
4 - 6
1 2 3 4 5 6
(R16386)
Harness 5P
5P Connector
Check
S20
1 - 5
2 - 5
3 - 5
4 - 5
1 2 3 4 5
(R20506)
Содержание FTKN09NMVJU
Страница 12: ...SiUS041501E 1 List of Functions Part 1 List of Functions 1 Functions 2...
Страница 17: ...SiUS041501E Specifications 6 Part 2 Specifications 1 Specifications 7 1 1 Cooling Only 7 1 2 Heat Pump 11...
Страница 59: ...SiUS041501E Remote Controller 48 Part 5 Remote Controller 1 Cooling Only 49 2 Heat Pump 51...
Страница 65: ...SiUS041501E Service Diagnosis 54 5 13 Power Module Check 100...
Страница 132: ...Revision History Month Year Version Revised contents 03 2015 SiUS041501E First edition...