SystemAir SYS WSC 86 Installation & Owner's Manual

INSTALLATION & OWNER’S

MANUAL

SYS WSC 86

Wired Simplified Controller

Thank you for purchasing the wired controller.

This manual describes the safety precaution requirement of using this controller.

● Read this manual carefully and be sure you understand
the information before attempting to use the controller.

● Keep this manual where it is readily accessible after
reading it through.

● If another user operates the controller in the future, be

sure to hand over this manual to the new user.

Contents

Installation .........................................................................................................1

1. Safety Precautions .......................................................................................... 1

2. Accessories ..................................................................................................... 3

3. Installation Procedure...................................................................................... 4

Operation ........................................................................................................... 9

1. Safety Precautions .......................................................................................... 9

2. Parts of the Wired Controller......................................................................... 11

3. Icons in the Display ....................................................................................... 13

4. Operation Guide ............................................................................................ 13

Field Setting..................................................................................................... 24

1. Restore Factory Default ................................................................................ 24

2. Query and Set the Indoor Unit Address......................................................... 25

3. Commissioning Parameter Settings .............................................................. 26

4. Query Operations .......................................................................................... 33

5. Error Display.................................................................................................. 37

Troubleshooting .............................................................................................. 40

Installation

1. Safety Precautions

Please read these Safety Precautions carefully before installing the wired controller.



This manual classifies the precautions into WARNING and CAUTION. They both contain

important information regarding safety. Be sure to follow all the precautions below.



After completing the installation, conduct a trial operation to check for faults and explain to

the customer how to operate the controller with the aid of the operation manual. Ask the
customer to store the installation manual along with the operation manual for future
reference.

Ask your dealer or qualified personnel to carry out installation work.

Do not attempt to install the wired controller yourself. Improper installation may result in
leakage, electric shocks or fire.

Consult your local dealer regarding relocation and reinstallation of the wired controller.

Improper installation work may result in leakage, electric shocks or fire hazards.
Install the wired controller in accordance with the instructions in this manual.
Improper installation may result in water leakage, electric shocks or fire.

Failure to follow these instructions properly may result in personal
injury or loss of life.

Failure to observe these instructions properly may result in property

damage or personal injury, which may be serious depending on the

circumstances.

Identifier

Meaning

Warning

Caution

Warning

●

●

●

1

Important

Indicates a useful hint or additional information.

Be sure to use only the specified accessories and parts for installation work.

Failure to use the specified parts may result in the unit falling down, water leakage, electric

shocks or fire.

Install the wired controller on a foundation strong enough to withstand the weight of the

wired controller.

Insufficient strength may result in the wired controller falling down and causing injury.

Electrical work must be performed in accordance with the relevant local and national
regulations and with the instructions in this manual.

Be sure to use a dedicated power supply circuit only. Insufficient power circuit capacity and

improper workmanship may result in electric shocks or fire.
Always perform installation work with the power turned off.
pressing electric parts may result in electric shock.

Do not disassemble, reconstruct or repair.

This may result in electric shock and/or fire.

Make sure that all wiring is secured, the specified wires are used and that there is no strain

on the terminal connections or wires.

Improper connections or securing of wires may result in abnormal heat build-up or fire.

The choice of materials and installations must comply with the available national and
international standards.

●

●

To avoid leakage and electric shock due to entry of water or insects, fill the wiring through

hole with putty.

To avoid electric shocks, do not operate with wet hands.
Do not wash the wired controller with water, as this may result in electric shocks or fire.
When the follow me function of the wired controller is used, select the installation location

while considering it should be a place:

●

1).Where the average temperature in the room can be detected.

2).Which is not exposed to direct sunlight.

3).Which is not near a heat source.

4).Which is not affected by the outside air or air draught due to, for example,
opening/closing of doors, the air outlet of the indoor unit or the like.

●

●

●

●

Caution

2

●

●

●

●

2. Accessories

Please check that you have all the following parts.

Please prepare the following parts on site.

1

2

2

No.

Name

Schematic Qty.

Remarks

No.

Name

Qty.

Remarks

Philips head screw,
M4X25mm

2

3

1

2

3

4

5

Plastic support bar

φ5X16mm

Operation and Installation

Manual

86 electrical box

2-core shielded copper wires

Wiring tubes (insulation suite)

Big Phillips screwdriver

Small slotted screwdriver

General specification for electrical box,

which is embedded into the wall.

2*AWG16-AWG20, pre-embedded

into wall.

Longest wiring length is 200 metres.

Pre-embedded into wall.

To install the Philips screws.

To dismantle the bottom lid of the wired
controller.

Used to install the wired

controller on the electrical

box

Used to install the wired

controller on the electrical

box

1

1

1

1

1

1

3

/

Table 2.2

Table 2.1





Make sure to refer to "1. Safety Precautions" to determine the location.

3-2 Structural Dimensions

3-3-1 Insert a small slotted-head screwdriver into the bottom slot of the wired controller and

rotate in the direction indicated to remove the rear cover of the wired controller. Pay attention
to the direction of rotation to prevent any damage to the rear cover of the wired controller. (see
Figure 3.3)

3-3 Rear Cover Installation

3. Installation Procedure

3-1 Determine Where to Install the Wired Controller

Figure 3.1 Figure 3.2

Screwdriver rotation direction

Slotted screwdriver

Figure 3.3

RT1

FOLLOW ME

4

86mm

20mm

86mm

60mm

41.7mm

3-3-2 Use a cutting tool to adjust the height of the two plastic support bars (accessory 2) to
match the standard length of the screw pillars of the electrical box to the wall surface. Make
sure that the support bars are level on the wall when the screw pillars of the electrical box are
mounted. (see Figure 3.4)

3-3-3 Once the heights of the plastic support bars are adjusted, fix the bars on the rear cover.
(see Figure 3.5)

Screw post of electrical box

Fix the support bars in the

direction of the arrow

Use a cutting tool to adjust the lengths of

the two plastic support bars

Figure 3.4

Figure 3.5

Warning

• When using the small slotted screwdriver to open the rear cover of the wired

controller, be careful not to damage the PCB inside.

• Do not touch the PCB of the wired controller.

5

h

h

Figure 3.6

To X1/X2 of indoor unit

Cross recessed

head screw

Electrical box

Rear cover of

wired controller

3-3-4 Take the shielded wiring that has been pre-embedded in the wall, and thread it through
the wire hole of the rear cover. Use the Philips head screws (accessory 1) to fix the rear cover
of the wired controller to the electrical box via the support bars. Make sure that the rear cover

is not deformed after being installed (see Figure 3.6).

3-4-1 Wiring specification

• The rear cover may be deformed if the screw is too tight.

• Prepare the electrical box and the 2-core shielded copper wire on site.

• Do not touch the PCB of the wired controller.

Important

Caution

△

!

3-4 Wiring

6

Type 2-core shielded copper wire

AWG 16-20

Maximum 200m

Diameter

Length

Table 3.1

Figure 3.7

1-to-1 1-to-1 1-to-1

One controller to one indoor unit connection method

One controller to one indoor unit connection method

Two controllers to one indoor unit connection method

3-4-2 Communication wiring

• The communication between the indoor unit and wired controller is bi-directional

communication. The parameters displayed on the wired controller are refreshed in real time
according to changes in the parameters of the indoor unit.

• X1 and X2 are terminals to connect the indoor unit and wired controller. There is no polarity
between X1 and X2.

• The longest wiring length between the wired controller and indoor unit is 200 meters.

P/Q/E

P/Q/E P/Q/E

P/Q/E

X1/X2

○○○

X1/X2

X1/X2

7





Figure 3.8

• For the two controllers to one indoor unit connection method, two wired controllers control
the same indoor unit, where one controller will be the "Main", and the other be the

"Secondary". Refer to "Field setting". The default setting of the wired controller is set to
main controller.

• This method is only available for two WDC-86E/KD wired controllers.

Two controllers to one indoor unit connection method

Not allowed

2-to-1

1-to-1

2-to-1

3.5 Install Main Body of Wired Controller

Take the shielded wiring that has been pre-embedded in the wall and pass it through the wiring
hole of the rear cover of the wired controller. Once connected, connect the wiring to the
terminal X1/X2 (CN2) of the wired controller, and fix the wired controller to the rear cover. (see

Figure 3.9)

Fix the wired controller correctly and firmly to the rear cover so that the wired controller will not
drop. (see Figure 3.10)

P/Q/E

P/Q/E P/Q/E

P/Q/E

X1/X2

○○○

X1/X2

X1/X2

X1/X2

X1/X2

8

Figure 3.9

• During installation, reserve a certain length for the connecting shielded wiring to

make it easier to remove the wired controller for maintenance.

The Safety Precautions classifies the precautions into WARNING and CAUTION.

They both contain important information regarding safety. Be sure to follow all the
precautions below.

This controller is not intended to be used by persons, including children, with reduced physical,
sensory or mental capabilities or lack of experience and knowledge, unless they are

supervised or have been given instructions on how to use the controller by a person
responsible for their safety.
Childen should be supervised to ensure that they do not play with the controller.

Figure 3.10

Caution△

!

Operation

1. Safety Precautions

Please read the Safety Precautions carefully before operating the wired controller.

9

CN2

X1 X2



Failure to follow these instructions properly may result in personal
injury or loss of life.

Failure to observe these instructions properly may result in property

damage or personal injury, which may be serious depending on the

circumstances.

Identifier

Meaning

Warning

Caution

Do not install the wired controller by yourself.

Improper installation may result in electric shocks or fire.

Consult your dealer.

Do not modify or repair the wired controller.

This may result in electric shocks or fire.
Consult your dealer.

Do not relocate or reinstall the wired controller by yourself.

Improper installation may result in electric shocks or fire.

Consult your dealer.

Do not use flammable materials (e.g., hairspray or insecticide) near the controller.

Do not clean the controller with organic solvents such as paint thinner.
The use of organic solvents may cause crack damage to the controller, electric shocks or fire.

Warning

●

●

●

●

10

Figure 4.1

Do not play with the wired controller.

Accidental operation by a child may result in impairment of bodily functions and harm health.

Never disassemble the wired controller.

Pressing the interior parts may result in electric shocks or fire.

Consult your dealer or authorized contractor for internal inspections and adjustments.

To avoid electric shocks, do not operate with wet hands.
Do not wash the wired controller.

Doing so may cause electric leakage and result in electric shocks or fire.

Do not leave the wired controller wherever there is a risk of wetting.

If water gets into the wired controller there is a risk of electrical leakage and damage to

electronic components.

Caution

●

●

●

●

●

2. Parts of the Wired Controller

⑤ Adjust ▲

⑥ Adjust ▼

⑦ ON/OFF button

⑧ Operating indicator

⑨ Cancel
⑩ Confirm

Infrared signal

receiving window

Display area of

wired controller

① Mode

② Fan speed

③ Swing

④ Function

11

Table 4.1

Note 1: Auxiliary heater function is reserved.

To turn on/off the unit

To set the operating mode: Auto → Cool→ Heat→ Dry→ Fan

To adjust temperature setting and timing (for timer) upwards.

To adjust temperature setting and timing (for timer)
downwards.

To switch to functions that can be set in the current mode.

To set the fan speed.

To set the swing function.

To turn off the timer/IDU LED display/silent/ECO/auxiliary

heater function

1

; to cancel the timer.

To turn on the timer/IDU LED display/silent/ECO/auxiliary

heater function

1

; to confirm the timer.

To indicate the ON/OFF state of the indoor unit.

Button

Functions

12

10. Confirm

8. Operating indicator

7. ON/OFF

1. Mode

5. Adjust upwards

6. Adjust downwards

4. Function

2. Fan speed

3. Swing

9. Cancel

Figure 5.1

3. Icons in the Display

4. Operation Guide

Clean filter reminder indicator

Indoor unit ON/OFF

1

Operating mode

Lock indicator

Timer ON/OFF

Fan speed

Swing

Function

Signal transmission indicator

Temperature

① ②

③ ④

⑤

⑨

⑧

③

①

②

⑤ ⑥

⑦

⑦

⑧

⑩

④

⑨

⑥

⑩

13

4-1 ON/OFF Setting

Note1: When the indoor unit is on, the icon " " spins; when the indoor unit is off, the icon " "

does not spin.

Figure 6.1

Figure 6.2

1) Press (ON/OFF) button, and the Operating Indicator " " on the wired controller will

light up, while the ON/OFF icon " " of the indoor unit on the display will spin to indicate

that the indoor unit has started running. (see Figure 6.1)

2) Press (ON/OFF) button again, and the Operating Indicator " " on the wired controller will

turn off, and the display icon " " will stop spinning as the indoor unit stops running.

4-2 Mode Setting

Press (Mode) button. Each time press this button, the operating mode will change in turn
as shown in Figure 6.3.

14

4-3 Fan Speed Setting

Figure 6.3

• The "Auto" mode is not available for all air conditioner models.

• Temperature setting is not available in the "Fan" mode.

• "Dry" mode and "Auto" mode is not available for FAPU .

Figure 6.4

Figure 6.5

15

In the "Auto", "Cool", "Dry", or "Heat" mode, press ▲ and ▼ buttons to adjust to the setting
temperature. (see Figure 6.4)

Note:

Auto →Cool→Heat→Dry→Fan

4-4 Swing Setting

In the "Cool", "Heat" or "Fan" mode, press (Fan speed) button to set the operating fan
speed (see Figure 6.5).
If the wired controller is configured with seven fan speeds, press (Fan speed) button to set

the fan speed in turn as shown in Figure 6.6.

If the wired controller is configured with three fan speeds, press (Fan speed) button to set
the fan speed in turn as shown in Figure 6.7.

• In the "Auto" and "Dry" modes, the fan speed is set to "Auto", and will not change even

press (Fan speed) button.

• The default fan speed is 7 fan speeds, please refer to "Field Setting" to adjust the default
fan speed.

Auto Speed 1 Speed 2 Speed 3 Speed 4 Speed 5 Speed 6 Speed 7

Figure 6.6

Figure 6.7

Figure 6.8

→ → → → → → →

16

Auto Low Mid High

→ → →

Note:

• The swing function is only available for indoor units configured with vertical louver.

• When the unit is off, the (Swing) button is invalid, and the wired controller automatically
turns off the swing function, and the display icon will no longer show the swing angle.

• This wired controller is unable to control horizontal swing in indoor unit.

Press (Swing) button to control the swing of the vertical louver of indoor unit (see Figure 6.8).

When the unit is on, the display icon shows the swing angle of the current louver.

Press (Swing) button, and the louver switches from the current angle to the angles in turn
as shown in Figure 6.9.

When the louver is in "Auto" state, Press (Swing) button again, and the louver will stop at

the current operating angle, and the display icon will show the current angle of the louver after
10 seconds.

Angle 1 Angle 2 Angle 3 Angle 4 Angle 5 Auto Stop

Figure 6.9

Figure 6.10

4-5 Function Setting

17

Note:

• Press (Function) button to go to the function settings. Press (Function) button each

time to select the function, and the icon for the selected function will blink. Press
(Confirm) button to confirm the function, or (Cancel) button to cancel the function.

• Press (Function) button to go to the function setting, and the display on the wired

controller will show in turns: " ", " ", " ", " ", " " (reserved). Alternatively, you
can press ▲ and ▼ buttons to switch to the selected function. (see Figure 6.11)

Press (Function) button to switch to the function that can be set in the current mode (see

Figure 6.10).

Press (Function) button to go to the function setting page. Press (Function) button
again to select " ", and the IDU LED Display icon " " will blink. Then press (Confirm)

button to confirm, and " " will light up, or press (Cancel) button to cancel, and the "IDU
LED Display" function will turn off. (see Figure 6.12)

Figure 6.11

Figure 6.12

→ → → →

Auxiliary

Heater

Start

Off

Steady on

Off

Blink

18

The "IDU LED Display" function is used to control the on/off state of display in the indoor unit.

4-5-1 IDU LED Display

The "Silent" function is used to send the "Silent" control signal to the indoor unit. The indoor
unit automatically optimizes the noise it generates when it is in the "Silent" state.

The "ECO" function is used to send the "ECO" control signal to the indoor unit. The indoor unit
will run in the energy saving mode when it is in the "ECO" state.

Figure 6.13

4-5-2 Silent

4-5- 3 ECO

• Turn on/off the "Silent" function: press (Function) button to switch to the "Silent"

function (" " blinks), and press (Confirm) button to turn on the function or (Cancel)
button to turn off the function (see Figure 6.13).

• The "Silent" function will be cancelled and needed to be reset when the unit is manually
turned off.

• Once it has been running for 8 hours, the Silent icon " " will no longer light up, and the
unit will exit the "Silent" operating state.

• The "Silent" and "ECO" functions cannot be set at the same time.

19

Note:

Blink

Start

Off

Off

Figure 6.14

4-5-4 Auxiliary Heater (Reserved)

4-5-5 Follow Me

• Turn on/off the "ECO" function: press (Function) button to switch to the "ECO" function
(" " blinks), and press (Confirm) button to turn on the function or (Cancel) button to

turn off the function (see Figure 6.14).

• When switching modes or turning off the unit, the unit will exit the "ECO" function.

• Once it has been running for 8 hours, the ECO icon " " will no longer light up, and the

unit will exit the "ECO" operating state.

• The "Silent" and "ECO" functions cannot be set at the same time.

20

Note:

Blink

Start

Off

Off

Figure 6.15

"Timer" is used to set the timed on/off state of indoor unit.

• press (Function) button to switch to the "Timer" function. When the indoor unit is on, first

complete the "Timer Off" settings, and then the "Timer On" settings. When the indoor unit

is off, first complete the "Timer On" settings, then the "Timer Off" settings.

• When the indoor unit is off:

1) "Timer On" setting: press (Function) button to go to the "Timer On" setting, the display
will show "0.0h Time On", and the words "Time On" will blink, then press (Confirm)
button to go to the timer setting. Press ▲ and ▼ buttons to adjust the time, and press
(Confirm) button to complete the timer setting (see Figure 6.16).

4-5-6 Timer

• When the "Follow Me" functions of wired and remote controllers are turned on at the
same time, the "Follow Me" function priority is assigned to the wired controller.

21

Note:

The "Follow Me" function of the wired controller is on by default, and its icon lights up when
the function is on.

1) Turn off "Follow Me": Press (Swing) and (Confirm) buttons at the same time, and

hold for 5 seconds to turn off the "Follow Me" function, and its icon disappear.

2) Turn on "Follow Me": When the "Follow Me" function is off, Press (Swing) and

(Confirm) buttons at the same time, and hold for 5 seconds to start the "Follow Me"
function again, and display its icon " " (see Figure 6.15).

Press at the same

time and hold for 5 seconds

Figure 6.16

2) "Timer Off" setting: Once the "Timer On" setting is completed, press (Function) button

to go to the "Timer Off" setting, the display will show "0.0h Time Off", and the words

"Time Of" will blink. press (Confirm) button to go to the timer setting, and press ▲ and
▼ buttons to adjust the time, then press (Confirm) button to complete the timer setting.

• When the indoor unit is on: Refer to the above operations to configure the "Timer On" and

"Timer Off" settings.

• When adjusting the timing steps, press and hold ▲ and ▼ buttons for more than 1 second

to adjust the timing step values quickly.

• "Cancel Timer" Function: press (Function) button to go to the timer setting, press
(Cancel) or (ON/OFF) button or set the time value to zero to cancel the timer settings. Go

back to the main page.

• When the unit is on, the wired controller can be used to set the timer information for "Timer
Off" and "Timer On", and when "Timer Off" is cancelled, "Timer On" will be cancelled

as well. When the unit is off, timer information for both "Timer On" and "Timer Off" can be
set, and when "Timer On" is cancelled, "Timer Off" will be cancelled as well.

• Once the wired controller has set the timer information, the Timer icon in the display of

the indoor unit will not light up until the preset timing when the wired controller sends the

ON/OFF signal to the indoor unit.

• Secondary wired controller has no timer function.

22

Note:

• When the system contains both the centralized controller and wired controller at the same
time, the centralized controller can lock the indoor unit so that some of its functions become
unavailable. If the indoor unit is locked by the centralized controller, and the display icon of
the wired controller " " is on, and some operations fail to respond, please check the
corresponding setting of the centralized controller.

• When the wired controller locks the temperature range by itself, the icon " " will light up,
but the outer frame " " will be off. When the temperature range is locked by the centralized
controller, the lock icon " " and the outer frame " " will both light up at the same time.
When two locks exist, the interval for the alternating display is 5 seconds.

4-6 Clean Filer Reminder

Figure 6.17

Figure 6.18

• When the operating time reaches the preset time, the Filter icon " " lights up to remind

users to clean the filter.

• Press and hold (Swing) button for 5 seconds to remove the Filter icon " ".

• Go to "Field Setting" to turn on/off this function or preset time of this function.

• The secondary wired controller has no clean filer reminder function.

4-7 Locking Function

23

24

• One or more of the following functions of the indoor unit are locked when the icon " " lights

up on the display: wireless remote controller, on/off state, lowest cooling set temperature,
highest set temperature, mode, fan speed, wired controller lock.

• When the centralized controller and wired controller execute the lock function on the wired
controller at the same time, priority is assigned to the centralized controller.

• When two wired controllers control one indoor unit at the same time, one controller will be
the "Main", and the other will be the "Secondary".

• Go to "Field Setting" to configure the "Main" and "Secondary" controllers. The default

setting is set to main wired controller.

Note:

• The main wired controller can set the "Timer", "Filter" and "Indoor unit commissioning
parameter" , but not the secondary remoter controller.

• The "Follow Me" function of the main wired controller is effective but the secondary wired
controller does not have this function.

• If either controller is used to change the operating state of the indoor unit, the change will be

4.8 Main/Secondary Wired Controller

• At any time, press and hold (Mode), (Function), ▲ and ▼ buttons at the same time for

5 seconds, and the wired controller will reset.

Field Setting

1. Restore Factory Default

• If the indoor unit has no address, the display will show "FE", and the wired controller will

display an E9 error.

• Press and hold ▲ and ▼ buttons for 8 seconds to go to the page to set the indoor unit
address. press (Cancel) button to exit the settings page.

• Query and set up the address of the indoor unit is allowed in the address setting page.

• In the address setting page, the wired controller displays the current address if the indoor
unit has an address. If the indoor unit has no address, press ▲ and ▼ buttons to

2. Query and Set the Indoor Unit Address

Figure 7.1

Figure 7.2

25

• Go to the commissioning parameter setting page. Check that "C0" is displayed in the temperature
display area. Press ▲ and ▼ buttons to change the "commissioning parameter Code".

• Once the "commissioning parameter Code" is selected, press (Confirm) button to go to the
specific commissioning parameter settings, and then press ▲ and ▼ buttons to adjust the value.

Press (Confirm) button to save the value and complete the commissioning parameter
setting.

• Press (Cancel) button to return to the previous page until you exit commissioning parameter
settings. Alternatively, system will exit the commissioning parameter settings page if there is no
operation for 60 seconds.

• When it is in the commissioning parameter settings page, the wired controller does not

respond to any remote control signals.

• In the commissioning parameter setting page, the (Mode), (Fan speed), (Swing),
(Function) and (ON/OFF) buttons are not available.

• Commissioning parameter can be set when the unit is on or off.

• Press and hold (Function) and (Mode) buttons for 5 seconds to go to the page for

commissioning parameter settings.

3. Commissioning Parameter Settings

Figure 7.3

26

adjust the address to the required value (address range is 0-63). press (Confirm) button

to send the current address value to the indoor unit. In 60 seconds, the wired controller will
exit the address setting page, or press (Cancel) button to exit the address setting page.

• In the address setting page, the wired controller will not respond to any remote control signals.

C7

Table 5.1

27

Parameter
Code

Parameter
Content

Select
Parameters

Address
Setting

F0: Main wired
controller

F0

If two wired controllers control one indoor unit,

the address must be different

F1: Secondary
wired controller

Cooling

Only/Cooling
and Heating

Setting

00: Cooling and
Heating

00

Heating mode is not available in cooling only

setting.

01: Cooling
Only

Reserved

/

/

/

Set time to
remind users
to clean the
filter

00/01/02/03/04 02

00: No reminder to clean filter

01: 1250h

02: 2500h

03: 5000h

04: 10000h

Settings for

infrared
receiver of
wired

controller

00: Disable

01

When "Disable" is selected, the wired controller
cannot receive remote control signal,

01: Enable

Fan speed
setting in
wired
controller

00: 3 fan
speeds

02

Default is 7 fan speeds.

01: 4 fan

speeds

02: 7 fan
speeds

Reserved

/

/

/

Display
indoor
room
temperature

00: No

00

If "00" is selected, the wired controller will

01: Yes

Default

Value

Remarks

C0

C1

C2

C3

C4

C5

C6

C7

The bi-directional communication automatically
identifies 3 fan speeds or 7 fan speeds.

display the setting temperature when the
backlight is off. If "01" is selected, the wired
controller will display the room temperature
when the backlight is off.

1

28

Settings to
turn on/off
operating
indicator

01

Select "On" and the operating indicator will show the

ON/OFF state of the indoor unit.
Select "Off" and the operating indicator will always
be off regardless if the indoor unit is on or off.

C91

Static
pressure
setting of
indoor unit

A52:00/01/02/

03/04/05/06/07
/08/09/FF
H-DUCT

3

4

,
FAPU :
00/01/~/19/

FF

01

The indoor unit sets the selected corresponding
static pressure.
Refer to the indoor unit for specific static pressure
values. FF: initial value is based on the
indoor unit data read by the wired controller.

C101

Set the time
delay to
stop the
fan of the
indoor unit.

00/01/02/03
/FF

00

Parameter

00

01

02

03

FF

Value
Represents

4
Min

8
Min

12
Min

16
Min

Based on

the dial
switches in
the main
PCB of the

indoor unit

C111

Indoor unit

-

cold draft
prevention
temperature
settings

00/01/02/03
/FF

00

Parameter

00

01

02

03

FF

Common
Indoor Unit

15°C/
59°F

20°C/
68°F

24°C/
75°F

26°C/
79°F

Based on

the dial
switches in
the main
PCB of the

indoor unit

FAPU

14°C/
57°F

12°C/
54°F

16°C/

61°F

18°C/
64°F

Based on

the dial
switches in
the main
PCB of the
indoor unit

01: On

00: Off

Remarks

Default
Value

Select
Parameters

Parameter
Content

Parameter
Code

C8

29

C12

1 and 5

Indoor unit
heating
temperature
compensation
setting

00/01/02/
03/04/FF

00

Parameter 00 01 02 03 04 FF

Value
Represents

6°C/
43°F

2°C/
36°

F

4°C/
39°F

6°C/

43°F

0°C/

32° F

Based on
the dial
switches
in the
main PC

B

of the
indoor
unit

C13

1 and 5

Indoor unit

cooling ­Temperature
compensation
setting

00/01/FF 00

Parameter 00 01 FF

Value
Represents

0°C/32°F 2°C/36°F

Based on the

dial switches in
the main PCB of

the indoor unit

C145

Indoor unit
auxiliary
heater setting

00: None

Common

Indoor
Unit: 01

FAPU: 00

01:

Available

C151

Indoor unit

auto-restart

setting

00: None

01

01:

Available

C165

Indoor unit
vertical
swing setting

00: None

Common

Indoor
Unit: 01

FAPU: 00

01:

Available

Remarks

Value

Default Select

Parameters

Parameter
Content

Parameter
Code

30

C175

Indoor unit
horizontal swing

setting

00: None

Common

Indoor Unit:
01

FAPU: 00

01: Available

C18

Display of

indoor unit to
receive the
remote control

signals

00: No

01

01: Yes

C19

Buzzer of the
indoor unit rings

00: No

01

01: Yes

C20

Follow Me in

wired controller
temperature

correction

Celsius:

-5.0~5.0°C
Fahrenheit:

-9.0~9.0°F

Celsius:

-3.0°C
Fahrenheit:

-6.0°F

Accuracy is 0.5°C/1°F.

C21

Set outdoor
ambient
temperature
value when
auxiliary
heater is on

Celsius:

-5~20°C
Fahrenheit:
23-68°F

Accuracy is 1°C/1°F.

C22

Mode switch
interval in Auto
mode

00/01/02/03 00

Parameter 00 01 02 03

Value
Represents

15 Min 30 Min 60 Min 90 Min

Remarks

Default
Value

Select
Parameters

Parameter
Content

Parameter
Code

Celsius:

15 °C

Fahrenheit:

59 °F

31

C23

Select opening
of electronic
expansion valve
in Heating or
Standby mode

00/01/FF 01

Parameter FF

Value
Represents

Based on the dial
switches in the
main PCB of the
indoor unit

C24

Temperature

Unit

00/01 00

00: Celsius
01: Fahrenheit

C25

Set lowest
cooling
temperature
limit

Celsius:
30°C - 17°C
(default is 17°C)
Fahrenheit:
86°F - 62°F
(default is
62°F)

Only available for the wired controller itself.

C26

Set highest
heating
temperature
limit

Celsius:
30°C - 17°C
(default is 17°C)
Fahrenheit:
86°F - 62°F
(default is
62°F)

Only available for the wired controller itself.

C27

Set to display

0.5°C

00/01 00

00: Show 1

°

C

01: Show 0.5°C

Remarks

Default
Value

Select
Parameters

Parameter
Content

Parameter
Code

Celsius:

17 °C

Fahrenheit:

62 °F

Celsius:

30 °C

Fahrenheit:

86 °F

00

72

01

96

1 Once the indoor unit and wired controller communicate successfully, the default parameters

of the above table will synchronize to the indoor unit settings.

2 Only for medium static duct unit

4 Only for FAPU models

5 This parameter is not available for the FAPU models.

• The secondary wired controller can only perform the parameter settings for C0-C8 and
C24-C27.

Capacity

00 01

02 03 04 05 06

07

08 09

1.8 - 7.1kW

0Pa

10Pa

20Pa

30Pa

40Pa

50Pa

50Pa

50Pa

50Pa

50Pa

8.0

-

12.5kW

10Pa

20Pa

30Pa

40Pa

50Pa

60Pa

70Pa

80Pa

90Pa

100Pa

14.0kW

30Pa

40Pa

50Pa

60Pa

70Pa

80Pa

90Pa

100Pa

125Pa

150Pa

32

Note:

Capacity 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19

1

4.0 kW

100

Pa

110

Pa

120

Pa

130

Pa

140

Pa

150

Pa

160

Pa

170

Pa

180

Pa

190

Pa

200

Pa

210

Pa

220

Pa

230

Pa

240

Pa

250

Pa

250

Pa

250

Pa

250

Pa

250

Pa

20.0- 28.0
kW

100

Pa

120

Pa

140

Pa

160

Pa

180

Pa

200

Pa

220

Pa

240

Pa

260

Pa

270

Pa

280

Pa

290

Pa

300

Pa

310

Pa

320

Pa

330

Pa

340

Pa

360

Pa

380

Pa

400

Pa

45.0-56.0
kW

100

Pa

120

Pa

140

Pa

160

Pa

180

Pa

200

Pa

220

Pa

240

Pa

260

Pa

270

Pa

280

Pa

290

Pa

300

Pa

310

Pa

320

Pa

330

Pa

340

Pa

360

Pa

380

Pa

400

Pa

3 Only for high static duct unit

Capacity 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19

7.1 - 1

6.0

kW

30

Pa

50

Pa

60
Pa

70
Pa

80
Pa

90
Pa

100

Pa

110

Pa

120

Pa

130

Pa

140

Pa

150

Pa

160

Pa

170

Pa

180

Pa

190

Pa

200

Pa

200

Pa

200

Pa

200

Pa

20.0- 28.0

kW

30

Pa

50

Pa

60
Pa

70
Pa

80
Pa

90
Pa

100

Pa

110

Pa

120

Pa

130

Pa

140

Pa

150

Pa

160

Pa

170

Pa

180

Pa

190

Pa

200

Pa

210

Pa

230

Pa

250

Pa

40.0-56.0

kW

100

Pa

120

Pa

140

Pa

160

Pa

180

Pa

200

Pa

220

Pa

240

Pa

260

Pa

270

Pa

280

Pa

290

Pa

300

Pa

310

Pa

320

Pa

330

Pa

340

Pa

360

Pa

380

Pa

400

Pa

In the main page, press and hold (Fan speed) and (Confirm) buttons at the same time for
5 seconds to go to the query page. You can query the check operation parameters of the

outdoor and indoor units as well as the program version of the wired controller.

Press ▲ and ▼ buttons to select the indoor or outdoor unit: o00-o03 for outdoor unit; n00-n63

for indoor unit.

• press (Confirm) button to query the parameter, or (Cancel) button to quit the query

function.

• In the query page, press ▲ and ▼ buttons to query the parameters. Parameters can be

queried in turn.

• The "Check No." is displayed in the timer area at the top of the query page, and the

contents of the checked parameter is displayed in the temperature area.

4. Query Operations

Figure 7.4

33

1

ODU address

2 Outdoor ambient(T4) temperature (°C)

3

T2/T2B average Temp. (corrected) (°C)

Main heat exchanger pipe(T3) temperature (°C)

5

Discharge Temp. of compressor A(°C)

6 Discharge Temp. of compressor A(°C)

7

Inverter compressor A current (A)

8 Inverter compressor B current (A)

9

Reserved

10 Fan speed

11

EXVA position/4

12 EXVB position/4

13

EXVC position/4

14 Operating mode

15

Priority mode

16 Total capacity requirement correction of indoor unit

17

Number of outdoor units

18 Total capacity of outdoor unit

Parameter displayed on the wired controller during ODU spot check No.

4

34

Table 6.1

Address of VIP indoor unit

No. Parameter displayed on the wired controller during ODU spot check

19

Inverter-module heatsink Temp. A(°C)

20 Inverter-module heatsink Temp. B(°C) (reserved)

21

Reserved

22 --

23

Plate heat exchanger outlet (T6B) temperature (°C)

24 Plate heat exchanger inlet (T6A) temperature (°C)

25

System discharge superheat degree

26 --

27 Number of operating indoor units

(in case of virtual addresses, this is

the number of units with the virtual addresses included)

28 --

29

High pressure of system

30 Low pressure of the system (reserved)

31

Most recent error or protection code

32 Inverter compressor A frequency

33

Inverter compressor B frequency

34 Unit capacity

35

Program version No.

35

36

No.

Parameter displayed on the wired controller during ODU spot check

37 Reserved 2

38

Reserved 2

No. Parameter displayed on the wired controller during IDU spot check

1

IDU communication address

2 Capacity (HP) of IDU

3

IDU network address (the same as the communication address)

4 Set temperature Ts

5

Room temperature T1

6 Actual T2 indoor temperature

7

Actual T2A indoor temperature

8 Actual T2B indoor temperature

9

Ta temperature (FAPU)

11

Target superheat degree (reserved)

12 EXV position/8

13

Software version No.

14 Error Code

Compressor discharge temperature (show high discharge temperature)

10

36

Table 6.2

• When there is a communication error between the wired controller and the indoor unit, the

wired controller will show the error code "E9", an indication of a communication failure in
wired controller.

• When the indoor or outdoor unit fails, the display of the wired controller shows the address
of faulty unit(s) in the timer area, and the error code in the temperature area.

Table 7.1

5. Error Display

List of IDU error codes:

Error
Code

Error Definition and Description

FE Indoor unit has no address

E0 Mode conflict error

E1 Communication error between indoor and outdoor units

E2 T1 sensor error

T2 sensor error

E4 T2B sensor error

E5 T2A sensor error (Reserved)

E6

Fan error in indoor unit

E7 EEPROM error fault

Ed

Outdoor unit error

EE Water level alarm error

Eb Electronic expansion valve of indoor unit has error

E3

37

Table 7.2

List of ODU error codes:

Error
Code

E0

ODU communication fault

XF1

PTC error

E1

Three-phase power supply
phase protection

F3

Error in temperature sensor at T6B
plate heat exchanger outlet

E2

Communication error between

indoor and outdoor units

F5

Error in temperature sensor at T6A

plate heat exchanger inlet

E4

Error in condenser

temperature sensor (T3) or
ambient temperature sensor

(T4)

P0

Inverter compressor top temperature
protection

E5

Voltage protection

P1

High pressure protection

E7

Discharge temperature sensor
fault

P2 Low pressure protection

E8

ODU address error fault

XP3

Compressor overcurrent protection

XE9 Drive mismatching fault P4

Protection against excessive
discharge temperature of compressor

EL Reserved P5

High temperature protection of

condenser

XH0

Communication error between
IR341 and master chip

P9 DC Fan Error

H1

Communication chip and
master chip communication

fault

PF Reserved

H2 ODU qty decrease fault PL

Protection against excessive
temperature of the inverter module

H3 ODU qty increase fault PP

Protection against excessively low

discharge superheat

Code

Error

Error Definition and
Description

Error Definition and Description

38

List of ODU error codes:

Error
Code

Error Definition and
Description

Error
Code

Error Definition and Description

XH4

Inverter module protection

fault

XL0 Inverter module fault

H5

3X P2 protection fault in 60
minutes

XL1 DC bus low voltage protection

H6

3X P4 protection fault in 100

minutes

XL2 DC bus high voltage protection

H7

IDU qty decrease fault

XL3

Reserved

H8

High-pressure sensor fault

XL4

MCE fault/synchronization/closed loop

H9

3X P9 protection in 60
minutes

XL5 Zero speed protection

Hb

Low pressure sensor fault

XL7

Phase sequence error protection

C7

3X PL protection in 100
minutes

XL8

Protection against sudden speed
change in compressor > 15Hz

F0

3X PP protection in 100
minutes

XL9

Protection to prevent the difference
between the speed setting and actual
operating speed of the compressor >

15Hz

39

40

Troubleshooting

Error code and

description

Possible Causes Possible Solutions

No display on the
wired controller

IDU is not powered on Power on the IDU.

Wired controller connection error

First power off the IDU, and then check if
the wired controller connection is correct.
See Section 3.4 on the wiring requirements.

Wired controller damaged Replace the wired controller.

Power supply failure of the IDU main PCB Replace the IDU main PCB.

E9

Wired
controller
and IDU
communi
cation
fault

IDU has no address or IDU address
duplicated

Set an address for the IDU; duplicated IDU

addresses are not allowed in the same

system.

Wired controller damaged Replace the wired controller.

IDU main PCB fault Replace the IDU main PCB.

Some functions of

the indoor unit
cannot be
controlled, such
as ON/OFF,
temperature, mode,
fan speed and

wired

controller lock.

The

" "

icon in the wired controller is

always on.

Check if the indoor unit has been locked by
the centralized controller.

Table 8.1

16117100001523

MD18U-003DW