Troubleshooting
Electrical Control System
115
2.4.1.6.
Refrigerant Leakage Detection
Malfunction conditions
Define the evaporator coil temperature T2 of the compressor starts
running as Tcool.
If the following occurs 3 times, the display shows "EC" and the unit
switches off:
In the first 8 minutes after the compressor starts up, if T2
<
Tcool
-
2
℃
is
not maintained for 4 seconds and compressor running frequency is not
higher than 50Hz for 3 minutes
Potential causes
●
T2 sensor error
●
Indoor PCB error
●
Refrigerant system error, such as leakage or blockages
Is there cool air blowing
out from indoor air outlet?
Yes
Yes
Check if T2 sensor is well
fixed. Correct the installation
or replace T2 sensor. Does
the problem still remain?
No
Is there any leakage, especially
in connective components such
as the gas valve and the liquid
valve?
No
Shut off the power supply and
turn it on
2 minutes
later. Is it
still displaying the error code?
Replace indoor PCB
Yes
Repair the leakage and
recharge the refrigerant
Yes
Clear the
blockages
Yes
Are there any blockages in areas such as
the capillary or the welded points of the
pipes?
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...