INSTALLER
TROUBLESHOOTING
For model:
MUEX-42-H3.5
21
If some error occurs when the unit is running, the error code will be displayed on the wired controller and the main board
of
the outdoor unit.See the table before for more details about the meaning of each error.
Code
Description
Error Type
ON
Normal running
-
08
Defrosting mode 1
Special Mode
0A
Defrosting mode 2
Special Mode
dd
Trial / Run operation
Special Mode
E1
High pressure protection
Outdoor
E2
Shutdown for whole unit anti-freeze protection
System Error
E3
Low pressure ptrotection
Outdoor
E4
High discharge temp. Protection
Outdoor
E5
Whole unit over-current protection
Outdoor
E6
Cimunication error
O Indoor
E8
Cooling overload protection
System Error
E9
Indoor unit water full error
Indoor
OC
Heating overload protection
System Error
F0
Refrigerant recovery mode
Special Mode
F3
Outdoor ambient temperature sensor error (RT2)
Outdoor
F4
Outdoor mid-coil temperaure sensor error (RT1)
Outdoor
F5
Outdoor discharge temperature sensor error (RT3)
Outdoor
F7
Oil return for cooling
Special Mode
H1
Forced defrosting
Special Mode
H1
Oil return for heating or defrosting
Special Mode
H3
Compressor overheat protection
Drive error
H5
IPM protection
Drive error
H7
Motor desynchronizing
Drive error
Hc
PFC error
Drive error
Lc
Startup failure
Drive error
LA
DC fan motor error
Outdoor
H6
No indoor fan motor
Indoor
U1
Compressor phase circuit detection error
Outdoor
U3
DC link voltage drop error
Outdoor
U3
DC link voltage drop error
Outdoor
U8
Zero detection circuit error
Outdoor
Ld
Phase loss
Drive error
L9
Too high power protection
System Error
LE
Compressor stalling
Outdoor
LF
Over-Speed
Drive error
P0
IPM reset
Drive error
P5
Compressor current protection
Drive error
P6
Comunication error between the inverter drive and the main controler
Drive error
P7
Radiator temp. sensor error
Drive error
P8
Ratiator overheat protection
Drive error
P9
AC contactor protection
Drive error
Pc
Current sensor error
Drive error
Pd
Sensor connection protection
Drive error
PH
Over voltage protection
Drive error
PL
Low voltage protection
Drive error
PE
Temp. Drift protection
Drive error
PF
Drive board ambient temperature sensor error
Drive error
PA
AC current protection
Drive error
PU
Charging circuit error
Drive error
PP
AC input voltage anomaly
Drive error
