2.4.2.4. E4 malfunction
Judge 1: Outdoor condenser temp. sensor (T3) is malfunction
Judge 1: Outdoor condenser temp. sensor (T3) is malfunction
E4 display
E4 display
No
No
Replace condenser temp. sensor(T3)
Replace condenser temp. sensor(T3)
Check whether the wiring of the
condenser temp. sensor(T3) is
broken off
Check whether the wiring of the
condenser temp. sensor(T3) is
broken off
Check whether the resistance of
condenser temp. sensorT3) is wrong
refer to the
Appendix
1
Check whether the resistance of
condenser temp. sensorT3) is wrong
refer to the
Appendix
1
Yes
Connect the wiring well
Connect the wiring well
Yes
Judge 2: Outdoor ambient temp. sensor (T4) is malfunction
Judge 2: Outdoor ambient temp. sensor (T4) is malfunction
No
Replace outdoor ambient
temperature sensor (T4)
Replace outdoor ambient
temperature sensor (T4)
Check whether the wiring of the
outdoor ambient temperature
sensor (T4) is broken off
Check whether the wiring of the
outdoor ambient temperature
sensor (T4) is broken off
Check whether the resistance of
outdoor ambient temperature
sensor (T4) is wrong refer to the
Appendix
1
Check whether the resistance of
outdoor ambient temperature
sensor (T4) is wrong refer to the
Appendix
1
Yes
Connect the wiring well
Connect the wiring well
Yes
Judge 3: Compressor discharge temp. sensor (T5) is malfunction
Judge 3: Compressor discharge temp. sensor (T5) is malfunction
No
Replace compressor discharge
temperature sensor (T5)
Replace compressor discharge
temperature sensor (T5)
Check whether the wiring of the
compressor discharge temperature
sensor (T5) is broken off
Check whether the wiring of the
compressor discharge temperature
sensor (T5) is broken off
Check whether the resistance of
compressor discharge temp. sensor
(T5) is wrong refer to the
Appendix
2
Check whether the resistance of
compressor discharge temp. sensor
(T5) is wrong refer to the
Appendix
2
Yes
Connect the wiring well
Connect the wiring well
Yes
No
Replace outdoor main PCB
Replace outdoor main PCB
No
78
Electrical Control System
Summary of Contents for ICS0629C21
Page 1: ...SERVICE MANUAL IOS629C2V01 IOS736C2V01 IUS0736C21 ICS0629C21 ICS0736C21 AIR CONDITIONER i ...
Page 2: ......
Page 4: ......
Page 9: ...Part 2 Indoor Units Four way Cassette Type 6 Ceiling Floor Type 20 5 ...
Page 13: ......
Page 16: ...Service Space 3 Service Space 1000mm 1000mm 1000mm 1000mm 12 Four way Cassette Type ...
Page 17: ...Wiring Diagrams 4 Wiring Diagrams ICS0629C21 ICS0736C21 Four way Cassette Type 13 ...
Page 23: ...Field Wiring 11 Field Wiring ICS0629C21 ICS0736C21 Four way Cassette Type 19 ...
Page 27: ...Service Space 3 Service Space Ceiling Floor Type 23 ...
Page 28: ...Wiring Diagrams 4 Wiring Diagrams IUS0736C21 24 Ceiling Floor Type ...
Page 35: ...Field Wiring 11 Field Wiring IUS0736C21 Ceiling Floor Type 31 ...
Page 40: ...Wiring Diagrams 3 Wiring Diagrams IOS629C2V01 36 Outdoor Unit ...
Page 41: ...Wiring Diagrams IOS736C2V01 Outdoor Units 37 ...
