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