Sanhua SEC Series User manual

Copyright ©SANHUA 2019 II-SEC61-EN-R1911 1 / 11
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SEC series EEV Controller
Manual/Installation Instructions
1. Basic specifications
Items
Description
Dimension
87(W)mm x 114(H)mm x 30 (D)mm
Power supply
24Vac +10%/-15%, 50/60Hz
24Vdc+10%/-10%
Class II
Power consumption
Max 4W at 24Vdc
Connection
Pluggable terminal: Screw M2
Min/Max wire diameter: 0.08²~1.3 mm²
XHP terminal
Input
Pressure sensor
Temperature sensor
RUN signal（Passive switch signal）
Output
Relay output（30Vdc/5A）
EEV (uni-polar) output
Communication
RS 485
Operation
-25~60oC，Humidity≤95%RH
Storage
-30~60 oC，Humidity≤95%RH
Protection level
IP20
Cautions
1. This product may cause an electric shock in handling. Please do not attempt to open it with power turned on.
2.This product should be installed in a place fixed secured by a rack or panel.
3.This product can be used under the following environmental conditions:
●Indoor ●Pollution Degree 2 ●At an altitude of 2000m or below
4. Power input must be within the designated ranges.
5. To turn on or turn off power supply for this product, please use the circuit breaker or switch of a standard product of
IEC 60947-1 or IEC 60947-3 product and install it within a close distance allowing convenient operation by user provided.
6. An output wire to be used for this product should be inflammable grade FV1(v-1 grade or above). The thickness of
the wire should 0.08mm²~1.3 mm²
7. In order to prevent it from an inductive noise, please maintain the high-voltage wire and power wire separated.
8. Please avoid installing the product in a place where a strong magnetism, noise, severe vibration and impact exist.
9. When extending the sensor wire, use a shield wire and do not extend it unnecessary long.
10. The sensor wire and signal wire should be away from the power and load wires using conduits separately installed.
11. Please avoid using the product near a device generating strong high frequency noise (high frequency welding machine,
high-frequency sewing machine, high-frequency radiotelegraph, high capacity SCR controller)

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2. Dimensions
3.Installation Notes
a. DIN slide rail mounting
Mount the controller on the DIN
rail by the snap on the back of the
controller. Installed in the electric
control cabinet to avoid moisture
and dust.
b. Sensors installation
Pressure transmitter / temperature sensor
installed on the tube of evaporator outlet.
If the system is divided into several evaporators,
install pressure transmitter/temperature sensor
at each evaporator outlet.

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4. Wire Connections
Type
Function
Label
Description
Pluggable
terminal
Power supply
24Vac/Vdc
+24V
AC24V / DC24V+
-24V
AC24V / DC24V-
Compressor
signal and
comm. port
RUN
GND
Passive switching signal, open or close
synchronously with the compressor, close
when using manual mode
S/W
RS485
GND
GND
B-
TRX-(B)
A+
TRX+(A)
Auxiliary relay
output
AUX-RLY
N.O
Normally Open contact
COM
common
N.C
Normally Close contact
XHP
terminal
Pressure sensor
P-SENS
Vcc
Power: YCQB: +5V
(Red) YCQC: 10-30Vdc
S1
S1 YCQB: 0.5-3.5V
(White) YCQC: 4-20mA
GND
GND YCQB: GND
(Black) YCQC: N/A
Temp. sensor
T-SENS
S2
NTC5K/B3970
GND
EEV output
EEV MOTOR
A
B
A

B

COM

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Safety Tips：
1. Do not turn on the power before completing the wiring, cut off the power before changing the wiring.
2. The RUN port (compressor signal) is a passive port. If add a voltage it may cause the controller burn out.
3. Ultracapacitor please series connected to the power supply wire. (Coming soon)
4. If you use a transformer, please ensure the minimum power is 15 VA (for 1 controller + 1 EEV).
5. Min/max wire diameter: 0.08mm²~1.3 mm²

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5. DIP SW Setting
All DIP switches are OFF in default mode (suitable for most applications). There are 4 DIP switches, 2, 3 used as a group for
selecting EEV type, 1, 4 used as a group for selecting controller operating mode.
a. EEV type selecting
EEV total steps, excitation speed and excitation mode is determined by the DIP SW2, 3
(Default mode)
DIP SW2: OFF, DIP SW3: OFF DIP SW2: OFF, DIP SW3: ON DIP SW2: ON, DIP SW3: ON
1-2 phase, 500 steps, 30pps 2phase, 2000 steps, 100PPS Custom mode, set by parameter table 3
b. Control method selecting
Control method determined by the DIP SW1, 4
DIP SW position
Description
Schematic
-DIP SW1: OFF, DIP SW4: OFF
-Superheat control (Default mode)
-Temp./pressure signal ensures
system SH stable
-DIP SW1: ON, DIP SW4: OFF
-Manual operation
-Use Button directly
controls the valve opening ratio
-DIP SW1: ON, DIP SW4: ON
-Drive mode
-Use 4-20mA or 1-5Vanalog signal
control

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-DIP SW1: OFF, DIP SW4: ON
-Hot gas bypass (temperature control)
Note: 1. While using the manual /drive mode, keep the compressor RUN signal always ON.
2.In drive mode, external 4-20mA or 1-5V analog signal is input through the pressure sensor port.
6.Buttons and operation
a. Screen introduction
Use button can switch the display on screen among superheat/pressure/valve opening/temperature (current display
is indicated by the cursor pointer)
b. Buttons introduction
Enter the parameter setting interface / return parameter list
Switch screen display parameters, increase/decrease parameters
Confirm key, parameter switch in parameter table, long press save parameter
LED
Description
SH
Display current superheat
PRESS
Display pressure sensor value
OPEN
Display current EEV opening
TEMP
Display temperature sensor value
oC /bar
Unit of temp./pressure
Lighting when alarming
Flickering at communication mode
POWER
Lighting at power up
TX,RX
Flickering at communication

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c. Set/change parameters
1.During operating status, long press for more than 3s, enter parameter setting mode
2. When screen show , press until screen display 5(original password), then press enter parameters
table list
3. means parameters table1，press can select or (switching parameter table)
4.After selected parameters table, press enter the table, if you want to switch other parameter tables, press
return to the parameter table select list
5. In parameters table, screen will directly display the parameter code, press can switch the code in parameters table
6. When the screen displays the parameter code which you want to modify, press can modify parameters
directly, and press will turn to next parameter or press return to the parameter table select list
7. After finish modifying, long press for 3s will save all settings and return to the operating interface.

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d.Main parameter setting
1.Refrigerant selection
Refrigerant data is in
Add.
Code
Description
Default
40062
Refrigerant
0(R22)
Now 26 kinds refrigerants is available in controller as below:
0
R22
7
R1234YF
14
R744(CO2)
21
R124
1
R404A
8
R290
15
R744(N2O)
22
R717
2
R410A
9
R450A
16
R32
23
R407H
3
R134A
10
R513A
17
R245FA
24
R454C
4
R407C
11
R448A
18
R23
25
R455A
5
R507
12
R449A
19
R407A
6
R1234ZE
13
R452A
20
R407F
2.Target superheat setting
Target superheat is in
Add.
Code
Description
Default
40001
Target superheat
6
If the target SH is too small, may cause liquid hammer in compressor; if the target value is too large, the evaporator
energy efficiency will be very low.
3.Start open ratio and duration time
You can find it in
Add.
Code
Description
Default
40003
Start open ratio
0
40004
Start open ratio duration time
0
When controller receives compressor RUN signal, EEV will keep the start opening ratio for the duration time.
7.Alarm mode
Code
Description
Code
Description
RUN signal disconnected
MOP high pressure alarm
Pressure transmitter disconnected
LOP Low pressure alarm
Pressure transmitter short circuit
High superheat alarm
Temperature sensor disconnected
Low superheat alarm
Temperature sensor short circuit
Low temperature freezing alarm
Note : is not alarm, just reminding the compressor RUN signal is disconnected.

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8.Parameters Table
1) (Parameters Table1)
1) Alarm setting
When alarm setting is ON, if system pressure/temperature exceeds/below the set alarm value and keep more than the delay
time, the controller will generate an alarm and act accordingly
Add.
Description
Code
Unit
Step
Min.
Max.
Default
40001
Superheat set point
K
0.1
0.5
30
6
40003
Start open ratio
%
1
0
100
0
40004
Start open ratio duration time
Sec
1
0
600
0
40005
P: Proportional gain
%
0.1
0.1
99.9
3
40006
I: Integral time
Sec
1
0
999
20
40007
D: Derivative time
Sec
1
0
999
4
40008
Low SH alarm mode
0=No use 1=automatic return 2=manual return
1
40009
Low SH alarm value
K
0.1
0.5
30
0.5
40010
Low SH alarm delay time
Sec
1
1
300
15
40011
Clear low SH alarm
K
0.1
1
30.5
3
40012
MOP alarm mode
0=No use 1=automatic return 2=manual return
1
40013
MOP alarm pressure
bar
0.1
-1
50
9
40014
MOP alarm delay time
Min
1
1
15
1
40015
Clear MOP alarm
bar
0.1
-1
50
8
40016
High SH alarm mode
0=No use 1=automatic return 2=manual return
0
40017
High SH alarm value
K
1
10
40
30
40018
High SH alarm delay time
Sec
1
1
600
3
40019
Clear high SH alarm
K
0.1
7
37
27
40021
Freeze prevention alarm mode
0=No use 1=automatic return 2=manual return
0
40022
Freeze prevention alarm value
oC
1
-40
40
0
40023
Freeze prevention alarm delay time
Sec
1
5
200
30
40024
Clear freeze prevention alarm
oC
1
-37
43
3
40025
Select pump down function and
delay time
Sec
1
0
180
-1(OFF)
40026
Pressure set-point for stopping
pump down
bar
0.1
-0.5
18
0.5
40027
Pressure low limit alarm mode
0=No use 1=automatic return 2=manual return
0
40028
Pressure low limit alarm value
bar
0.1
-0.8
17.7
0
40029
Low limit pressure alarm delay
time
Sec
1
5
200
5
40030
Clear low limit pressure alarm
bar
0.1
-0.5
18
0.3

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2) (Parameters Table2)
Add.
Description
Code
Unit
Step
Min.
Max.
Default
40061
Password
/
1
0
999
5
40062
Refrigerant
0=R22 1=R404A 2=R410A 3=R134a 4=R407C 5=R507
6=R1234ze 7=R1234yf 8=R290 9=R450A 10=R513A
11=R448A 12=R449A 13=R452A 14=R744(CO2)
15=R744(N20) 16=R32 17=R245fa 18=R23 19=R407A
20=R407F 21=R124 22=R717 23=R407H 24=R454C
25=R455A
0
40063
Pressure sensor MAX. range
bar
1
0
99
12(Current)
20(Voltage)
40064
Pressure sensor MIN. range
bar
1
-1
99
-1(Current)
0(S Voltage)
40065
Pressure sensor offset correction
K
0.1
-9.9
9.9
0
40066
Temp. sensor offset correction
K
0.1
-20
19.9
0
40069
Jerk control ratio
0.1
0.1
100
100
40070
EEV open ratio upper limit
%
1
0
100
100
40071
EEV open ratio lower limit
%
1
0
100
0
40072
Sensor input filter time
/
0.1
0.1
10
1
40073
EEV compulsory open ratio
%
0.1
0
100
OFF(-1)
40076
Display mode
0=1~4 rotation / 1= Superheat
2=Evaporator outlet pressure / 3= Expansion valve open ratio
4= Evaporator outlet temperature / 5= Saturation temperature
1
40077
Run/stop method
0= Always run / 1= Digital input
2= Communication Run
1
40078
CommunicationID setup
/
1
1
254
1
40079
Communication speed setup
48(0)=4800 96(1)=9600 192(2)=19200 384(3)=38400
96
Reset
/
1
0
999
0
1) set to password value (default 5), and then long press the controller will factory reset.
3) (Parameters Table3)
Add.
Description
Code
Unit
Step
Min.
Max.
Default
40041
Hold current
0=OFF
1=ON
0
40042
Expansion valve excitation type
1-2(0)=1-2 phase excitation
2(1)=2 phase excitation
1-2
40043
Expansion valve total pulse
pulse
1
10
999
50
40044
Expansion valve open pulse
pulse
1
0
999
30
40045
EEV drive speed (PPS)
10(0)=10PPS 20(1)=20PPS 30(2)=30PPS
50(3)=50PPS 80(4)=80PPS 100(5)=100PPS
200(6)=200PPS 250(7)=250PPS 500(8)=500PPS
30(2)
1) Parameter Table 3 is usually not use, SANHUA standard EEV can directly set by the DIP SW. If you want modify parameters
table 3, please change DIP SW first. (See page5)
2) Because the controller screen display maximum value is 999，so 40043EEV total stepspulse50 means 500 steps.

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9.Communication Protocol
a. Specification
Item
Description
Transmission line connection
Multiple line
Communication method
RS485（2-wire, half-duplex）
Baud-rate
Default 9600BPS
Parity, Data, Stop bit
None，8 data，1 stop
Protocol Type
Modbus RTU Mode
Function Code
Read Hold Registers（0×03）/Preset Single Register（0×06）
Max. Read Word
32word
Media Type
Belden 9841/9842, LG LIREV-AMESB
Poll interval
100ms
b. Status of Communication table
Add.
Function
Unit
Type
S
SEC601
MMI
40073
EEV compulsory open ratio
-
Analog
INT 16
0.0-100.0
×10
40099
Reset command
-
Analog
INT 16
0:OFF
1:ON
40101
Run/Stop input
-
Analog
INT 16
0:Stop
1:Run
40102
Operation status
-
Analog
INT 16
Refer to below bit
Bit0
Operation status of EEV
-
Digital
bit
0:OFF
1:ON
Bit1
Aux. relay output
-
Digital
bit
0:OFF
1:ON
40110
Alarm status
-
Analog
INT 16
Refer to below bit
Bit0
Press. sensor disconnection
-
Digital
bit
0:OFF
1:ON
Bit1
Press. sensor short circuit
-
Digital
bit
0:OFF
1:ON
Bit2
Temp. sensor disconnection
-
Digital
bit
0:OFF
1:ON
Bit3
Temp. sensor short circuit
-
Digital
bit
0:OFF
1:ON
Bit4
MOP alarm
-
Digital
bit
0:OFF
1:ON
Bit5
Low limit pressure alarm
-
Digital
bit
0:OFF
1:ON
Bit6
High superheat alarm
-
Digital
bit
0:OFF
1:ON
Bit7
Low superheat alarm
-
Digital
bit
0:OFF
1:ON
Bit8
Freezing Protection alarm
-
Digital
bit
0:OFF
1:ON
40111
Present Superheat
K
Analog
INT 16
×10
40112
Present saturation temperature
℃
Analog
INT 16
×10
40113
Present pressure
bar
Analog
INT 16
-1.0~1.0
×10
40114
Present temperature
℃
Analog
INT 16
-100.0~100.0
×10
40116
EEV open ratio
%
Analog
INT 16
0.0~100.0
×10