SANHUA SEC Series EEV Controller Instruction Manual

This product should be installed in a place fixed secured by a rack or panel.
This product can be used under the following environmental conditions:
• Indoor
• Pollution Degree 2
• At an altitude of 2000m or below

Power input must be within the designated ranges.
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.

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
In order to prevent it from an inductive noise, please maintain the high-voltage wire and power wire separated.

Please avoid installing the product in a place where a strong magnetism, noise, severe vibration and impact exist.
When extending the sensor wire, use a shield wire and do not extend it unnecessary long.

The sensor wire and signal wire should be away from the power and load wires using conduits separately installed.
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)

Basic specifications

Items	Description
Dimension	87(W)mm x 114(H)mm x 30 (D)mm
Power supply	24Vac +10%/-15%, 50/60Hz (SEC611) 24Vdc+10%/-15% (SEC611 & SEC612) Class II
Power consumption	15VA with Sanhua EEV 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
Output	EEV (uni-polar) output
Communication	RS 485
Operation	-30~55 oC, Humidity≤95%RH
Storage	-30~55 oC, Humidity≤95%RH
Protection level	IP20

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 evapora tor outlet. If the system is divided into several eva porators, install pressure transmitter / temperature sensor at each evaporator outlet.

We recommend to install the temperature and pressure sensors within 0.5m from the evaporator to prevent ambient temperature and pressure drop interference for the superheat calculation.

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 swithcing 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 Open contact
XIIP terminal	Pressure sensor	P-SENS	Vcc	Power: YCQB: +5V (RED) YCQC: 10-30Vdc
			Si	Si YCQB: 0.5-3.5V (White) YCQC: 4-20mA
			GND	GND YCQB: GND (Black) YCQC: N/A
	Temp. sensor	T-SENS	S2	NTCSK/B3970
			GND
	EEV output	EEV MOTOR	A
			B
			A
			B
			COM

Safety Tips:

Do not turn on the power before completing the wiring, cut off the power before changing the wiring.

The RUN port (compressor signal) is a passive port. If add a voltage it may cause the controller burn out.
Ultracapacitor please series connected to the power supply wire. (Coming soon)

If you use a transformer, please ensure the minimum power is 15 VA (for 1 controller + 1 EEV).
Min/max wire diameter: 0.2 ~1.3 mm²

24Vdc or 24Vac for SEC611, 24Vdc only for SEC612.

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
1-2 phase, 500 steps, 30pps

DIP SW2: OFF, DIP SW3: ON
2phase, 2000 steps, 100PPS

DIP SW2: ON, DIP SW3: ON
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
	– DIP SW1: OFF, DIP SW4: ON – Hot gas bypass (temperature control)

Note:

While using the manual /drive mode, keep the compressor RUN signal always ON.
n drive mode, external 4-20mA or 1-5V analog signal is input through the pressure sensor port.

Buttons and operation

a. Screen introduction

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

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

c. Set/change parameters

During operating status, long press for more than 3s, enter parameter setting mode

When screen show , press until screen display 5 (original password), then press enter parameters table list
means parameters table1, press can select or (switching parameter table)
After selected parameters table, press enter the table, if you want to switch other parameter tables, press return to the parameter table select list

In parameters table, screen will directly display the parameter code, press can switch the code in parameters table
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
After finish modifying, long press for 3s will save all settings and return to the operating interface.

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.
4. Pump down function

Add.	Code	Description	Default
40025		Select pump down function and delay time	-1(OFF)
40026		Pressure set-point for stopping pump down	0.5

If 40025 value is not -1, pump down function is ON RUN signal = ON => Compressor is ON
RUN signal = OFF (need main controller to cut off) => EEV will close
when low pressure = 40026 bar or delay time = 40025 seconds, the Output Relay changes its position and will inform to cut Off the compressor
5. Reset to factory settings

Add.	Code	Description	Default
		Reset	0

Reset is in menu, use to find the parameter , input backup-password 913 and long press , all parameters reset to the default from factory

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
			Supply voltage out of tolerance

Note StP is not alarm, just reminding the compressor RUN signal is disconnected. Alarm manual reset button is on side face of SEC (EEV driver) shell.

Parameters Table

1. Refrigerant data is in

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		Min	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

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
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
40062	Refrigerant		5=R507 6=R1234ze 7=R1234yf 8=R290 9=R450A
40062	Refrigerant		10=R513A 11=R448A 12=R449A 13=R452A 14=R744(CO2) 15=R744(N20) 16=R32 17=R245fa				0
40062	Refrigerant		18=R23 19=R407A 20=R407F 21=R124 22=R717
40062	Refrigerant		23=R407H 24=R454C 25=R455A
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	1	99.9	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)

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 page 5)
Because the controller screen display maximum value is 999, so 40043 EEV total steps pulse 50 means 500 steps.

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
Bit6	MOP alarm	–	Digital	bit	0:OFF	1:ON
Bit7	Low limit pressure alarm	–	Digital	bit	0:OFF	1:ON
Bit8	High superheat alarm	–	Digital	bit	0:OFF	1:ON
Bit9	Low superheat alarm	–	Digital	bit	0:OFF	1:ON
Bit10	Freezing Protection alarm	–	Digital	bit	0:OFF	1:ON
40111	Present Superheat	K	Analog	INT 16		×10
40112	Present saturation temperature	C	Analog	INT 16		×10
40113	Present pressure	bar	Analog	INT 16	-1.0~1.0	×10
40114	Present temperature	C	Analog	INT 16	-100.0~100.0	×10
40116	EEV open ratio	%	Analog	INT 16	0.0~100.0	×10

Documents / Resources

SANHUA SEC Series EEV Controller [pdf] Instruction Manual
SEC Series EEV Controller, EEV Controller, SEC Series Controller, Controller, SEC Series

References

User Manual

SEC Series EEV Controller