Troubleshooting
Electrical Control System
112
2.4.1.3. Indoor EEPROM Malfunction
Malfunction conditions
Main PCB chip does not receive feedback from EEPROM chip
Possible causes
●
Installation mistakes
●
Faulty PCB
Yes
Replace the indoor main PCB
Power off, then restart the
unit 2 minutes later. Does a
problem remain?
EEPROM: An electrically erasable programmable read-only memory whose contents can be erased and
reprogrammed using a pulsed voltage.
2.4.1.4. Water-Level Alarm Malfunction
Malfunction conditions
If the sampling voltage is not 5V, the LED will display the failure
code.
Possible causes
●
Wiring mistakes
●
Faulty water-level switch
●
Faulty water pump
●
Faulty indoor PCB
Is the water-level
switch inserted
properly?
Is the water-level
switch inserted
properly?
No
Insert the water-level switch
properly
Insert the water-level switch
properly
Is the water-level
switch broken?
Is the water-level
switch broken?
Yes
Replace the water-level switch
Replace the water-level switch
Replace the water pump. Is
the malfunction still not
resolved?
Replace the water pump. Is
the malfunction still not
resolved?
Yes
No
Yes
Replace the indoor main PCB
Replace the indoor main PCB
Power off, then restart the unit 2 minutes
later. Is it still displaying the error code?
Power off, then restart the unit 2 minutes
later. Is it still displaying the error code?
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...