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Troubleshooting
SiUS071735EA
63
Service Diagnosis
4. Troubleshooting
4.1
Error Codes and Description
: Displayed only when system-down occurs.
Error Codes
Description
Reference
Page
System
00
Normal
—
U2
Low-voltage detection or over-voltage detection
U4
Signal transmission error (between indoor unit and outdoor unit)
UA
Mismatching of indoor unit and outdoor unit
Indoor
Unit
A1
Indoor unit PCB abnormality
A3
Drain level control system abnormality
A6
Indoor fan motor (DC motor) or related abnormality
A8
Indoor fan PCB abnormality
AF
Humidifier or related abnormality
C4
Indoor heat exchanger thermistor 1 or related abnormality
C5
Indoor heat exchanger thermistor 2 or related abnormality
C9
Room temperature thermistor or related abnormality
CJ
Remote controller thermistor abnormality
U5
Signal transmission error (between indoor unit and remote
controller)
U8
Signal transmission error (between MAIN remote controller and
SUB remote controller)
Outdoor
Unit
E1
Outdoor unit PCB abnormality
E5
OL activation (compressor overload)
E6
Compressor lock
E7
DC fan lock (outdoor fan motor)
E8
Input overcurrent detection
EA
Four way valve abnormality
F3
Discharge pipe temperature control
F6
High pressure control in cooling
F8
System shutdown due to compressor internal temperature
abnormality
H0
Compressor system sensor abnormality
H6
Position sensor abnormality
H9
Outdoor temperature thermistor or related abnormality
J3
Discharge pipe thermistor or related abnormality
J6
Outdoor heat exchanger thermistor or related abnormality
L3
Electrical box temperature rise
L4
Radiation fin temperature rise
L5
Output overcurrent detection
P4
Radiation fin thermistor or related abnormality
Summary of Contents for FDMQ09RVJU
Page 12: ...SiUS071735EA 1 List of Functions Part 1 List of Functions 1 Functions 2 ...
Page 14: ...SiUS071735EA 3 Specifications Part 2 Specifications 1 Specifications 4 ...
Page 120: ...Check SiUS071735EA 109 Service Diagnosis 15 18 24 class R25105 1 2 3 4 Multimeter ...
Page 122: ...Check SiUS071735EA 111 Service Diagnosis 15 18 24 class R20704 W V U DC_P1 DC_N1 ...
Page 140: ...Piping Diagrams SiUS071735EA 129 Appendix RX24RMVJU A 3D092249A ...