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Troubleshooting
Electrical Control System
132
2.4.4.13. J1 Malfunction
Malfunction conditions
When the outdoor pipe temperature is more than 65°C, the unit stops. It
starts again only when the outdoor pipe temperature is less than 52°C.
Possible causes
●
Faulty condenser temperature sensor
●
Dirty heat exchanger
●
System leakage or blockages
J1 displayed
J1 displayed
High temperature protection of
condenser
High temperature protection of
condenser
Is the condenser
temperature is Higher than
65°C?
Is the condenser
temperature is Higher than
65°C?
Yes
Is the resistance of
condenser temp. sensor
normal according
to
Appendix
1
Is the resistance of
condenser temp. sensor
normal according
to
Appendix
1
Replace the temperature sensor
Replace the temperature sensor
No
No
Is the outdoor ambient
temperature higher than
50
℃?
Is the outdoor ambient
temperature higher than
50
℃?
No
Stop the unit
Stop the unit
Yes
Is the outdoor unit ventilation
functioning properly?
Is the outdoor unit ventilation
functioning properly?
Yes
Ensure that the outdoor unit
ventilate is functioning properly
Ensure that the outdoor unit
ventilate is functioning properly
Is the heat exchanger dirty?
Is the heat exchanger dirty?
No
Clean the heat exchanger
Clean the heat exchanger
Yes
Check whether the refrigerant
system is functioning normally
Check whether the refrigerant
system is functioning normally
Replace outdoor main
board. Has the problem
been resolved?
Replace outdoor main
board. Has the problem
been resolved?
No
If the level of refrigerant is not
sufficient, does the system work after
refrigerant is added?
If the level of refrigerant is not
sufficient, does the system work after
refrigerant is added?
No
Is the outdoor fan running
properly?
Is the outdoor fan running
properly?
Refer to the solution to the
malfunction of fan speed being out of
control . Find the cause and resolve the
problem.
Refer to the solution to the
malfunction of fan speed being out of
control . Find the cause and resolve the
problem.
No
Yes
No
Correct the connection
Correct the connection
No
Yes
Is the connection between
temperature sensor and
PCB in working order?
Is the connection between
temperature sensor and
PCB in working order?
Yes
Summary of Contents for 38QUS012D8S
Page 1: ...Contents i Energy Related Products SUPER DC INVERTER SERIES Service Manual...
Page 13: ...Service Space Indoor Units 11 3 Service Space 1000mm 1000mm 1000mm 1000m m Chart 3...
Page 16: ...Air Velocity Distributions Reference Data Indoor Units 14 30 42K Cooling Heating...
Page 17: ...Air Velocity Distributions Reference Data Indoor Units 15 48 55K Cooling Heating...
Page 22: ...Field Wiring Indoor Units 20 10 Field Wiring 42QTD018R8S 42QTD024R8S 42QTD036R8S...
Page 23: ...Field Wiring Indoor Units 21 42QTD048R8S 42QTD060R8S...
Page 29: ...Features Indoor Units 27...
Page 46: ...Service Space Indoor Units 44 3 Service Space...
Page 61: ...Wiring Diagrams Outdoor Units 59 3 Wiring Diagrams 38QUS018R8S...
Page 62: ...Wiring Diagrams Outdoor Units 60 38QUS024R8S...
Page 63: ...Wiring Diagrams Outdoor Units 61 38QUS036R8S...
Page 64: ...Wiring Diagrams Outdoor Units 62 38QUS036R8T...
Page 65: ...Wiring Diagrams Outdoor Units 63 38QUS048R8T 38QUS060R8T...
Page 87: ...Refrigerant pipe installation Installation 85...