P24 OF 32
YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
Frequency limitation for PFC temperature protection
Flash 6 times
EU
EU
Frequency limitation for compressor overload protection
Flash 8 times
LU
Frequency limitation for compressor discharge temp protection
Flash 9 times
F9
Frequency limitation for low pressure protection
Flash 10 times
Pn
Frequency limitation for high pressure protection
Flash 11 times
F6
F6
Discharge temperature sensor error
Flash 12 times
F5
F5
Outside temperature sensor error
Flash 13 times
F3
F3
Suction temperature sensor error
Flash 15 times
dc
Condenser temperature sensor error
Flash 16 times
A7
A7
Sub-cool temperature sensor error
Flash 17 times
bC
Low pressure sensor error
Flash 18 times
dL
High pressure sensor error
Flash 19 times
e1
Fan motor protection
Flash 20 times
H6
H6
Driving board is connected
Flash 1 time
Testing board is connected
Flash 2 times
Computer is connected
Flash 4 times
Indoor unit 1 is connected
Flash 5 times
TROUBLESHOOTING
Indoor unit 2 is connected
Flash 6 times
Indoor unit 3 is connected
Flash 7 times
Indoor unit 4 is connected
Flash 8 times
Indoor unit 5 is connected
Flash 9 times
Indoor unit 6 is connected
Flash 10 times
Indoor unit 7 is connected
Flash 11 times
Indoor unit 8 is connected
Flash 12 times
Indoor unit 9 is connected
Flash 13 times
Indoor anti-freeze protection
E2
E2
Inside temperature sensor error
F1
F1
Evaporator midway temp sensor error
F2
F2
Liquid pipe of BU module temperature sensor error
b5
b5
Gas pipe of BU module temperature sensor error
b7
b7
Mode conflicts
E7
E7
Indoor unit A
E6 1A
Indoor unit B
BU 1
E6 1B
Indoor unit C
E6 1C
Indoor unit A
E6 2A
Indoor unit B
BU 2
E6 2B
Indoor unit C
E6 2C
Indoor unit A
E6 3A
Indoor unit B
BU 3
E6 3B
Indoor unit C
E6
E6 3C
Indoor unit A
E6 4A
Indoor unit B
E6 4B
Communication error
BU 4
Indoor unit C
E6 4C
Communication error between the main board and driving board
P6
Communication error between the main board and testing board
CE
Indoor unit gas sensor error
Fn
Indoor unit humidity sensor error
L1
Indoor unit water full error
E9
Jumper terminal error
C5
C5
Refrigerant recovery mode
Fo
Fo
P23 OF 32
YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
PROBLEM HANDLING
The conditions listed below are not classified into errors.
TROUBLESHOOTING
ERROR DESCRIPTION
If some error occurs when the unit is running, the error code will be displayed on the wired controller, the main
board and the testing board of the outdoor unit. Check for more details about the meaning of each error.
Conditions
Causes
When restart the unit soon after it is stopped
The overload protection switch of the unit let the
startup delayed for three minutes
As soon as power supply is on
The unit will stand by for approximate one minute
When the cooling operation starts
The hi-humidity air indoor is cooled quickly
The unit "clatters" as soon as it starts running
It is the sound generated during the initialization
of the electronic expansion valve
The unit "swishes" during the cooling operation
It is the sound when the refrigerant gas runs inside the unit
The unit "swishes" when it is started or stopped
It is the sound when the refrigerant gas stops running
The unit "swishes" when it is in and after the running
It is the sound when the draining system is operating
The unit "squeaks" when it is in and after the running
It is the sound of frication generated by the skin plate
etc which swells due to the temperature change
When the unit restarts after it is not used for a long time
The dust inside the unit is blown out again
The unit does not run
The unit blows out mist
The unit
generates noise
The unit blows out dust
The unit emits odors
When the unit is running
The odors absorbed in are blown out
Indoor
unit
code
Testing
board
code
Yellow LED
Red LED
Green LED
Main control display for outdoor unit
Errors of definition
The compressor is startup
Flash 1 time
IPM current protection
Flash 3 times
H5
H5
IPM temperature protection
Flash 5 times
P8
P8
PFC current protection
Flash 7 times
HC
HC
PFC temperature protection
Flash 8 times
P8
P8
Low voltage protection
Flash 9 times
PL
PL
High voltage protection
Flash 10 times
PH
PH
Low pressure protection
Flash 11 times
E3
E3
High pressure protection
Flash 12 times
E8
E8
High pressure switch protection
Flash 13 times
E1
E1
Capacitor charging error
Flash 14 times
PU
PU
Current protection
Flash 15 times
E5
E5
Memory card error
Flash 16 times
EE
EE
Compressor demagnetizing protection
Flash 17 times
HE
HE
Compressor desynchronizing
Flash 18 times
H7
H7
Compressor phase lack
Flash 19 times
U2
U2
Compressor phase circuit detection error
Flash 20 times
U1
U1
Compressor current protection
Flash 21 times
L9
L9
Compressor overload protection
Flash 22 times
H3
H3
Compressor discharge temperature protection
Flash 23 times
E4
E4
Lack of refrigerant or jam protection
Flash 31 times
F0
F0
Normal operation
Flash 1 time
Frequency limitation for current protection
Flash 2 times
F8
Oil returning
Flash 3 times
F7
F7
Defrosting
Flash 4 times
H1
H1
Frequency limitation for IPM temperature protection
Flash 5 times
EU
EU
UNIT MAINTENANCE &
SER
VICE GUIDE
UNIT MAINTENANCE &
SER
VICE GUIDE
