Parameter Resetting

Step

Operation

LED1

LED2

LED3

Remark

1

OFF status

O

F

F

Outdoor unit OFF

2

Press ”Func” for 5s

P

0

1

Enter into auto distribution operation initial

interface

3

Press ”Func” button

P

0

2

Enter into cooling test operation initial

interface

4

Press ”Func” button

P

0

3

Enter into heating test operation initial

interface

5

Press ”Func” button

P

0

4

Enter into vacuum/refrigerant reclaim

operation initial interface

6

Press ”Func” button

P

0

5

Enter into refrigerant reclaim operation

initial interface

7

Press ”Func” button

P

0

6

Enter into parameter resetting initial

interface

8

Press ”Up” button for 5s

O

F

F

System parameter reset, then back to

parameter setting interface

Note: All the parameters will be reset as the factory default value after this operation.

Status

Red Light

Green Light

Remarks

Initialization

Flashing

Flashing

Control software version will displayed

and flashed on LED nixietube

OFF

OFF

OFF

Cooling

OFF

ON

Heating

ON

OFF

Alarm

Flashing

Flashing

Malfunction Code

Malfunction Contents

Remarks

E01

External connection

Alarm on external connection, which cannot be covered

until power off

E02

Power supply protection

Alarm on power protector, it can only be recovered by

power off

E04

DC driver NO. conflicts with unit model

Alarm, system cannot start up before manually disposing.

E10

Indoor units communication failure

Communication failure with all indoor units

E11

Too less indoor units in normal

communication

The indoor units in normal communication is less than

50% of the setting ones

E12

System operation time exceeds the limit

Alarm will be displayed if the system running time exceeds

the setting operation time. At this time, system cannot

start up before manually disposing

E17

High pressure protection by high pressure sensor

Discharge pressure exceeds the limit and alarm information will be displayed

It will be recovered automatically when the discharge

pressure recovered

E18

Low pressure protection by low pressure sensor

Discharge pressure exceeds the limit and alarm information will be displayed

It will be recovered automatically when the suction

pressure recovered

E20

Low pressure switch protection

Low pressure switch alarm, it can be recovered

automatically

E21

Extreme low pressure protection of low

pressure sensor

Extreme low pressure is detected by the pressure sensor,

it can be recovered automatically.

E22

High pressure protection by high pressure sensor

After several times malfunction of high pressure protection by sensor in a short time, the system will be locked and cannot be started up. Contacting with local

service is necessary.

E23

Low pressure protection by low pressure sensor

After several times malfunction of low pressure protection by sensor in a short time, the system will be locked and cannot be started up. Connecting with local service is

necessary.

E25

Low pressure protection by low pressure switch

After several times malfunction of low pressure protection by low pressure switch in a short time, the system will be locked and cannot be started up. Connecting with local

service is necessary.

E26

Inverter compressor discharge

temperature protection

Inverter compressor discharge temperature exceeds the

limit. It can be recovered automatically.

E27

Several times inverter compressor discharge temperature protection in a short time

After several times malfunction of inverter compressor discharge temperature protection in a short time, the system will be locked and cannot be started up.

Contacting with local service is necessary.

E28

Several times inverter driver alarm in a short time

After several times alarm of inverter driver in a short time, the system will be locked and cannot be started up.

Contacting with local service is necessary.

E29

Communication malfunction of inverter driver

Malfunction of communication between main board and DC inverter driver. If the communication becomes normal,

it will be recovered automatically.

E30

Several times malfunction of BLDC1

After several times alarm of BLDC fan in a short time, the system will be locked and cannot be started up.

Contacting with local service is necessary.

E31

Several times malfunction of BLDC2

After several times alarm of BLDC fan in a short time, the system will be locked and cannot be started up.

Contacting with local service is necessary.

E33

Over current of IPM module

Short circuit of DC driver terminal port.

E34

Compressor driver failure

Losing phase of compressor power supply or compressor

failure.

E35

Over current of driver output

Compressor lover load

E37

IPM detection failure

Wiring malfunction of DC driver which must be reclaimed

for repairing.

E38

Overheat of heat sink

Low or no speed of outdoor fan, dust accumulating on the

heat sink, which may lead to bad heat transfer

E40

Over voltage of DC generatrix

Over voltage of power supply or DC driver failure

E41

Low voltage of AC input power

Low voltage of power supply or DC driver failure

E42

Low voltage of AC input

Low voltage of power supply

E43

Over voltage of AC input

Compressor over load

E44

Malfunction of voltage detection

Malfunction of voltage detection circuit, it must be

reclaimed for repairing.

E45

Communication malfunction of DSP and

PFC

Malfunction of DC driver, it must be reclaimed for

repairing.

E46

Malfunction of temperature sensor on

the heat sink

Sensor break or short circuit

E47

Communication malfunction of DSP and

communication board

Wiring malfunction of DC driver which must be reclaimed

for repairing.

E48

Malfunction of communication

Communication wiring break between driver and main

board