Parameter settings

To optimize control performance, use the local HMI to enter parameter mode and adjust a number of control parameters. All control parameter settings are retained after power failure.

Proceed as follows to change the control parameters:

Or

Press and hold the + and - buttons simultaneously for more than 3 seconds.

Service level: Release the buttons, and within 2 seconds, press and hold + until Pxx is displayed.
Expert level: Release the buttons, and within 2 seconds, press and hold - until Pxx is displayed.

Press + or - (< or >) to access the desired parameter and the value of the selected parameter is displayed at the same time.

Press () to edit the value of the required parameter.

Press + or - to increase/decrease or select the value of the current parameter during editing.

Press () to confirm the new value or press () to cancel the change, and repeat steps 3 to 5 to change more parameters.

Press () to exit parameter setting mode.

Reload factory setting

  • Select parameter P71 and set it to 1.
  • The factory settings of the control parameters are reloaded.
    • “- - -” is displayed during reload.

Control parameters

Service level

Parameter

Description

Factory setting

Setting range

P01 *

Select VRF mode
(set Master / Slave unit)

1

0 = AUTO/HEAT/COOL/FAN/Dehumidification

1 = HEAT/COOL/FAN/Dehumidification

2 = HEAT/COOL/FAN

3 = HEAT/COOL

4 = HEAT/FAN

5 = COOL/FAN/Dehumidification

6 = COOL/FAN

P02 *

Operation using operating mode selector

1

1 = ON – OFF

2 = ON – ECO – OFF

P03

Temperature display resolution

1

0 = 0.5 K

1 = 1 K

P04

Unit

0

0 = ℃ (Celsius)

1 = °F (Fahrenheit)

P05

Measured value correction (built-in sensor only)

0

-5…5 K

P06

Standard display

0

0 = Room temperature

1 = Setpoint

2 = BUS temperature

P08

Basic setpoint

21 ℃

5…40 ℃

P09

Minimum setpoint

5 ℃

5 ℃…P10 (P10 = 40 ℃ max.)

P10

Maximum setpoint

35 ℃

(P09 = 5 ℃ min.) P09…40 ℃

P14

Keylock

0

0 = Unlock

1 = Setpoint & fan buttons adjustment only

2 = Full lock

P27

Operating mode after power failure

0

0 = Previous operating mode

1 = OFF

2 = ON (Normal mode)

P28

Timer with delay Off (0 up to 23 hours, 0.5 h)

1

0 = Disable

1 = Enable

Note

* The parameters are critical and must be set according to the equipment selected during commissioning.

Expert level

Parameter

Description

Factory setting

Setting range

P53 *

Maximum VRF fan speed

3

1 = 1-speed

2 = 2-speed

3 = 3-speed

4 = 4-speed

5 = 5-speed

6 = 6-speed

7 = 7-speed

P71

Restore factory setting

0

0 = Disable

1 = Reload start

P81 *

Device address

247

1…247

P82 *

Modbus baud rate

2

1 = 9600 bps

2 = 19200 bps

3 = 38400 bps

4 = 57600 bps

P83 *

Modbus data frame format

0

0 = 1/8/E/1

1 = 1/8/O/1

2 = 1/8/N/1

3 = 1/8/N/2

P98 *

Enable Chinese text display

1

0 = Disable

1 = Enable

Note

* The parameters are critical and must be set according to the equipment selected during commissioning.

Expert level (diagnostics & tests)

Parameter

Description

Range

d06

Software version

xxx is displayed, e.g. 010