Kaysun KC-FCD2-M Operating instructions

Thank you very much for purchasing our product.
Before using your unit, please read this manual carefully and keep it for future reference.
INSTALLATION & OWNER’S
MANUAL
Wired Controller
KC-FCD2-M
KC-FCD2

This manual gives detailed description of the precautions
that should be brought to your attention during operation.
In order to ensure correct service of the wired controller
please read this manual carefully before using the unit.
For convenience of future reference, keep this manual after
reading it.

1 Quick Operation Process ............................... 01
2 Features ......................................................... 01
3 Main Parameters............................................ 02
4 Overview ....................................................... 03
5 Basic Setting ................................................. 04
6 Fan Speed Setting ........................................ 05
7 Timer Setting ................................................. 06
8 Child Lock Setting ......................................... 07
9 Indoor Temperature Display .......................... 07
10 Project Commissioning ................................. 08
11 Installation ..................................................... 12
CONTENTS

01
1 Quick Operation Process
On/Off switch Mode Adjust temperature Fan speed
1.1 Auxiliary function operation
Timer function:
Timing Adjust time
Press to conrm timing
Press and hold for 3s to cancel
the timing
ECO function:
Press and hold for 2s Enable the ECO mode
2 Features
Modbus
Modbus
(Not supported if
non-networked)
Child lockElectric auxiliary
heating mode
(Not supported if
non-networked)
ECO
setting
Timer
function

02
3 Main Parameters
Model Networked: KC-FCD2-M
Non-networked: KC-FCD2
Power supply 220-240VAC 50/60Hz
Load characteristic Resistive load< 1 A,Inductive load< 1 A
Operating environment -15°C to 43°C
Humidity ≤RH90 %
CAUTION
● Entrust a qualied local technician to perform installation.
The user must not install the unit. The unit must be installed
by a professional technician.
● Before cleaning or maintenance, ensure the power supply
is cut off. Do not use water for washing to prevent electric
shocks.
● Do not operate with wet hands to avoid electric shocks.
● Do not use pesticides, disinfectants, or ammable directly
on the wired controller as they may damage the device or
cause res.
● Do not try to remove the display panel with your bare hands
to avoid electric shocks.

03
4 Overview
Operating
mode display
Not supported
if non-networke
Fan speed display
Mode Fan speed/
ECO
Adjustment
button
Timing On/Off
Timer
display
ECO
display
Operating
indicator

04
5 Basic Setting
1 On/Off
2 Mode
selection
Press . The operating status LED turns on and the air
conditioner starts operating;
Press again. The operating status LED turns off and the
air conditioner stops operating.
The icon is displayed when the air conditioner is
off. Press to change the operating mode according to the
order shown below:
Two-pipe cooling and heating scenario is set before delivery
from factory by default. The scenario can be changed based
on the parameter settings according to the actual need. Only
two-pipe cooling and two-pipe cooling and heating modes
are supported if non-networked.
Scenario Mode switch
Two-pipe cooling Cool Fan
Two-pipe cooling and
heating
Cool Fan Heat
Two-pipe cooling + Auxiliary
electric heater
Cool Fan Auxiliary
electric heater
Two-pipe heating +
Auxiliary electric heater Cool Fan Auxiliary
electric heater
Heat + Auxiliary
electric heater
Two-pipe cooling and
heating + Auxiliary electric
heater
Cool Fan Heat Auxiliary
electric heater
Heat + Auxiliary
electric heater
Four-pipe Cool Fan Heat

05
3 Temperature
setting
4 ECO setting
Except in the Fan mode, press or to adjust the
set temperature indoors. Press and hold the button to
increase or decrease the set temperature continuously.
Press and hold bottom for 2s to enable ECO mode.
Cooling ECO: 26°C, low fan speed;
Fan ECO: low fan speed;
Heating ECO: 18°C, low fan speed;
Auxiliary electric heater ECO: 18°C, low fan speed;
Heating + Auxiliary electric heater ECO: 18°C, low fan
speed
6 Fan Speed Setting
1 Adjust fan
speed
Press to adjust the fan speed, which can be set to High,
Normal, Low and Auto.
● The fan speed cannot be adjusted in the oor heating mode.
● After the fan speed is set, it takes time for the air conditioner
to respond. It is normal if the air conditioner does not respond
to the setting immediately.
CAUTION

06
7 Timer Setting
1 Timed On setting:
Press and hold to cancel Press and hold to cancel
Press or switch
off the screen to
confirm the timing
2 Timed Off setting:
Press and hold to cancelPress and hold to cancel
Press or switch
off the screen to
confirm the timing
3 Cancel timing:
Press and hold Timer for 3s or set the timer to 0.0 to cancel timing.
● Timed Off can be set when the air conditioner is on and
Timed On can be set when the air conditioner is off.
CAUTION

07
8 Child Lock Setting
1 Enable child lock:
Press and hold the two
buttons for 1.5s
2 Disable child lock
Press and hold the two
buttons for 1.5s
Enable child lock
Disable child lock
9 Indoor Temperature Display
● The indoor temperature is displayed when the screen is off.
The wired controller doesn't
respond when buttons are
pressed and ashes.

08
10 Project Commissioning
10.1 Restore Factory Default Settings
● Touch and hold , and at the same time for 5s, and the wired
controller will restart with its parameters restored to the factory settings.
10.2 Error Display
● When the sensor fails, the LCD displays the error code E1 in the
Temperature Setting display area;
● In the Parameter Settings interface, the LCD displays the icon
when Modbus communication fails. It always displays if non-networked;
● Notify the distributor of the error code. Do not disassemble, modify or
repair the air conditioner without authorization.
10.3 Parameter Settings of the Temperature Controller
● Parameters can be set when the unit is on or off.
● Touch and hold and for 3s to enter the parameter settings
interface.
● After entering the page for parameter settings, C0 is displayed in the
temperature display zone. Press and to switch over to Parameter
Code; after selecting Parameter Code, press to enter the specic
parameter settings. Press and to set parameters. Press to
return to Parameter Code. Press to save the parameters and
complete the settings.
● If no operation is made in 60s, the page will save your parameters and
close.
● When it is in the parameter settings page, the wired controller cannot
communicate with Modbus.

09
Parameter
Code Parameter Name Parameter Range Default Value Remarks
C0 Wired controller address 01-32 01
C1 Two-pipe/four-pipe
selection
00: Two-pipe cooling and heating
01: Two-pipe cooling
02: Two-pipe cooling +Auxiliary
electric heater
03: Two-pipe heating +Auxiliary
electric heater
04: Two-pipe cooling and heating
+Auxiliary electric heater
05: Four-pipe
00
C2 ECO cooling
temperature setting 17°C to 30°C / 62°F to 86°F 26°C / 86°F Stepping 0.5°C /1°F
C3 ECO heating
temperature setting 17°C to 30°C / 62°F to 86°F 18°C / 64°F Stepping 0.5°C /1°F
C4 Anti-freezing protection 00: Off 01:Start 00
C5 Anti-freeze temperature
setting 0°C to 20°C / 32°F to 68°F 5°C / 41°F Stepping 0.5°C /1°F
C6 Baud rate setting 00: 4800 01: 9600 01
C7 Celsius/Fahrenheit 00: °C 01: °F 00
C8 Button backlight
setting 00: Off 01: On 01
C9 Language 00: Chinese 01: English 01
C10 Temperature
compensation
-3°C to 3°C (Min. 0.5°C)
-6°F to 6°F (Max. 1°F) 0
C11 Temperature return
difference 1, 2, 3 (°C) / 2, 4, 6 (°F) 1° C / 2°F
C12
Fan always on/always
off (After setting
temperature)
00: Always on 01: Always off 0
C13 Version Read only
Note: The “ ” indicates the function is not supported if non-networked.

10
10.4 Modbus
Only available in KC-FCD2-M model.
Transmission rate: 9600 bps; Data length: 8 bits; Stop bit: 1 bit;
Check bit: no check; Transmission code: hexadecimal value (MODBUS RTU
mode);
Error detection: CRC-16 (MODBUS RTU mode);
MODBUS communication IP address of slave unit: 1-32;
Command = 03: Multi-register read instruction; Command = 06: Single
register write instruction;
Command = 16: Multi-register write instruction.
Command Register
Address
Parameter
Name Parameter Range Default Value
03 1 Thermostat program
version No. 1~255
03 2 Room temperature 0~0xffff
03/06/16 3 Current ON/OFF
mode 0: OFF; 1: ON
03/06/16 4 Current setting
temperature 17°~30°C / 41°F~95°F
03/06/16 5 System mode
setting
0: Ventilation; 1: Cooling; 2: Heating;
3: Auxiliary electric heater;
4: Heating + Auxiliary electric heater
0
03/06/16 6 Set fan speed 1: Low; 2: Medium; 3: High; 4: Auto 4
03/06/16 7
Fan always on/
always off (After
setting temperature)
00: OFF; 01: ON 0
03/06/16 8 Select temperature
unit
00:°C degrees Celsius
01:°F degrees Fahrenheit 0
03/06/16 9 Temperature
compensation -3C°~3°C/ -6°F~6°F 0C° / 0°F
03/06/16 10 Temperature return
difference 1, 2, 3 C (°C) / 2, 4, 6 (°F) 1C° / 2°F
03/06/16 11 Communication IP
address (Modbus) 01-32 1

11
● The minimum interval of data packet is 100 ms. In case of
excessive data in a single data packet, adjust the time interval
appropriately.
Command Register
Address Parameter Name Parameter Range Default Value
03/06/16 12 Whether anti-freezing
protection is enabled 00: OFF; 01: ON 0
03/06/16 13 Anti-freezing setting
temperature 0° ~20°C / 32°F~68°F 5°C / 41°F
03/06/16 14 Centralized control
locking 00: OFF; 01: ON 0
03/06/16 15 System type
00: Two-pipe cooling and
heating
01: Two-pipe cooling
02: Two-pipe cooling +Electric
auxiliary heating
03: Two-pipe heating +Electric
auxiliary heating
04: Two-pipe cooling and
heating +Electric auxiliary
heating
05: Four-pipe
0
03 16 Restore factory
settings
0: General; 1: Restore factory
settings 0
03 17 High fan speed status 00: OFF; 01: ON 0
03 18 Medium fan speed
status 00: OFF; 01: ON 0
03 19 Low fan speed status 00: OFF; 01: ON 0
03 20 Valve 1 status 00: OFF; 01: ON 0
03 21 Valve 2 status 00: OFF; 01: ON 0
CAUTION

12
CAUTION
● Degrees Celsius: Value=Set temperature x 10. For example, if
the set temperature is 17.5°C, the value written to the register=
17.5 x 10 = 175.
● Currently, the set temperature can be adjusted only with an
accuracy of 0.5 degrees.
● The default status of Valve1 and Valve 2 will depending on the
system state.
11 Installation
11.1 Installation Precautions
● To ensure correct installation, read the "Installation" section of
this manual.
● The content provided here covers warnings, which contains
important information about safety that must be followed.
CAUTION
● Entrust the local distributor or local service agent to appoint
a qualied technician to perform installation. The user must
not install the unit.
● Do not disassemble and assemble the product without
permission.
● The wiring must be compatible with the wired controller
current.
● Use the specied cables, and do not place heavy object on
the wiring terminals.

13
11.2 Installation Accessories
Please check that you have all the following parts.
No. Name Qty Remarks
1 Wired controller 1
2 Philips head screw, M4×25 2 Used to install the wired controller
on the electrical box
3 Installation & Owner’s Manual 1
4 Plastic support bar 2 Used to install the wired controller
on the electrical box
5 Installation box (recessed type) 1
General specifications of the
installation box, which is embedded
into the wall
Prepare the following parts in the eld:
No. Name Qty Remarks
1 Shielded 3-core cable 1
RVVP-0.5 mm2×3, embedded into
the wall (Non-networked without
preparetion)
2Control cable (with the null and
live wires) 1 1.5 mm2×7, embedded into the wall
3 Small slotted screwdriver 2
Used to install the slotted head
screws and remove the bottom
cover of the wired controller

14
11.3 Product Dimensions (mm)
28
Mounting hole: 60
9
86
86
UP
X
Y
E
A
B
GND
11.4 Installation Method
1. Remove rear cover of the wired controller: insert a slotted-head screwdriver into
the bottom buckle of the wired controller, and rotate in the direction indicated to
remove the rear cover. Remove the at cable connecting the front and rear PCBs
and remove the front cover of the wired controller.
Screwdriver
rotation
direction
Slotted
screwdriver
Buckle

15
2. Install support bars: Adjust the lengths of the two plastic support bars in the
accessories. Ensure that the rear cover of the wired controller stays level with the wall
when installed on the screw post of installation box (cassette type).
Screw post of the installation
box (cassette type)
Use a cutting tool to adjust the lengths
of the two plastic support bars
3. Wiring: Connect the cables according to the following wiring drawing
UP
X
Y
E
A
B
GND
Low Valve 1 Valve 2 Neutral wireMediumHighLive wire
485
communication
interface
(Not supported if
non-networked)
(Valve 2 is not
supported if
non-networked)

16
● This product must be installed by a specialized technician.
Do not connect cables when the unit is active.
● Do not connect the neatral and live wires to the X/Y/E ends.
Otherwise, the wired controller will be burnt.
● Check the wiring before powering on the unit. Wrong wiring
may damage the wired controller.
Installation and Wiring diagram\
L Hf Mf Lf
Fan
V1 V2 N
N
L
Valve
AC220V N
LAC220V
L Hf Mf Lf
Fan
V1 V2 N
Valve
On Off
Three-wire
ball valve
Normally
close valve
Two-pipe cooling/cooling and
heating (Networked)
Two-pipe cooling/cooling and heating
(Networked/Non-networked)
PROHIBIT
WARNING

17
N
L
AC220V
L Hf Mf Lf
Fan
V1 V2 N
Valve
Heating
Valve
Cooling
Four-pipe(Networked)
Two-pipe heating + Auxiliary electric heater
Two-pipe cooling + Auxiliary electric heater
Two-pipe cooling and heating + Auxiliary
electric heater
(Networked)
Two-pipe cooling/cooling and
heating (Networked)
N
LAC220V
L Hf Mf Lf
Fan
V1 V2 N
Valve
Normally
open valve
N
L
AC220V
L Hf Mf Lf
Fan
V1 V2 N
ValveValve
Normally
close
valve
Auxiliary
electric
heater