Troubleshooting
2.4.2.11. P5 malfunction
When condenser high temp. is more than 65°C, the unit will stop, and unit runs again when outdoor pipe
temp. less than 52°C.
P5 display
P5 display
High temperature protection of
condenser
High temperature protection of
condenser
Check whether the
condenser temperature is
Higher than 65°C
Check whether the
condenser temperature is
Higher than 65°C
Yes
Check whether the
resistance of condenser
temp. sensor is normal
refer to the
Appendix
1
Check whether the
resistance of condenser
temp. sensor is normal
refer to the
Appendix
1
Replace the temperature sensor
Replace the temperature sensor
No
No
Check whether the outdoor
ambient temperature is
higher than 50
℃
Check whether the outdoor
ambient temperature is
higher than 50
℃
No
Stop the unit
Stop the unit
Yes
Check if the outdoor unit
ventilation is good
Check if the outdoor unit
ventilation is good
Yes
Make the outdoor unit ventilate well
Make the outdoor unit ventilate well
Check whether the heat
exchanger is dirty
Check whether the heat
exchanger is dirty
No
Clean the heat exchanger
Clean the heat exchanger
Yes
Check whether the refrigerant
system is ok
Check whether the refrigerant
system is ok
Replace outdoor main
board
Replace outdoor main
board
No
Refrigerant is not enough add the
refrigerant
Refrigerant is not enough add the
refrigerant
No
Check if the outdoor fan runs
properly
Check if the outdoor fan runs
properly
please refer to the solution of fan
speed has been out of control
malfunction . Find out the cause and
have it solved.
please refer to the solution of fan
speed has been out of control
malfunction . Find out the cause and
have it solved.
No
Yes
No
Correct the connection
Correct the connection
No
Yes
Check the connection
between temperature
sensor and PCB.
Check the connection
between temperature
sensor and PCB.
Yes
Electrical Control System
85
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 ...