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19
Mini-Split Error Codes
ERROR
CODE
EXPLANATION
RED
YELLOW
GREEN
NOTES
E1
High Pressure protect
1
E2
Inside Anti-Freeze Protect
2
E3 Low
Pressure
Protect
3
E4 Compressor
Discharge
protect
4
6 sec Pause before Flash Sequence
E5
low pressure over current protect
5
E6
indoor-outdoor communication Error
6
E7 Mode
conflict
7
E8
high Temp protect
8
E9 cold
wind
protect
9
E0
AC Voltage Low
10
H6
No Indoor motor feedback
11
F1
room temp sensor open/short
1
F2
Indoor evaporator sensor open/short
2
F3
Outdoor temp sensor open/short
3
F4
Outdoor evaporator sensor open/short
4
6 sec Pause before Flash Sequence
F5
Outdoor sensor open/short
5
F6 Cooling
Overload
6
F7
Unused
7
F8 Current
Overload
8
F9
Unused
9
F0
Unused
10
H1 Defrost
1
H2
Static duct clean protect
2
H3
compressor overload protect
3
H4
System Abnormal
4
6 sec Pause before Flash Sequence
H5
Mode Protect
5
H6
Unused
6
H7
Synchronize fail
7
H8
Water full protect
8
H9
PTC heating Error
9
HO
Heat high temp protect
10
FA
Pipe Hot
FH
Freeze Protect
Notes: Some Codes may not be available on some units.
Codes will flash prior to any change of state I.E. cool off, cool on, heat off, heat on, power on, etc.
Normal operation for indicator lights is as follows: Constant Red: power on, Constant Yellow: heat on,
Constant Green: cool on.
Heat Mode available for heat pump units only.