Emerson XEV22D Service Manual download pdf (Page 2)

1592025920 XEV22D GB r3.0 02.02.2011.doc XEV22D 2/2

6. FRONT PANEL

To display and to modify the set point.

In programming mode it selects a

parameter or it confirms a value.

By pressing and releasing this key, it’s

possible to see the values of the

probes.

In programming mode it slides the

codes of the parameters or it

increases their values.

In programming mode it slides the

codes of parameters or it decreases

their values.

KEYS COMBINATIONS

To lock or to unlock

the keyboard

To enter

programming mode.

6.1 XEV22D LEDS

On display there are some luminous dots. Their meaning is described in the following table:

LED MODE Function

ON Low pressure alarm

ON Maximum Operating Pressure alarm

OFF Valve is completely closed

BLINKING Valve is moving

ON Valve is completely opened

BLINKING Serial communication present

OFF Serial communication absent

ON Superheat alarm

7. USER INTERFACE

7.1 HOW TO: SEE THE READ-ONLY VALUES

1) Press and release UP button.

2) First read-only label is showed;

3) Brows parameter labels with UP or DOWN buttons.

4) Press SET to see read-only value. To change parameter, press SET.

5) To leave the fast access menu, press and release SET+UP or wait for time-out to expire (about 3

minutes).

7.2 HOW TO: SEE THE SET POINT

1) Press the SET buttons until the set point will be showed.

2) To come back to see temperature, wait about 5s or press newly SET key.

7.3 HOW TO: MODIFY THE SET POINT

To change the set point value operate as follows:

1) Press the SET button until the set point will be showed.

2) Use UP or DOWN buttons to change its value.

3) Press SET button to store the new value.

7.4 HOW TO: ENTERING “PR1” PARAMETER MENU

To enter in “Pr1” level menu:

1) Pressing SET+ DOWN buttons for about 3 seconds.

2) Instruments shows first parameter in Pr1 menu

7.5 HOW TO: ENTERING “PR2” PARAMETER MENU

To enter to “Pr2” parameters list:

1. Enter to “Pr1”.

2. Select “Pr2” parameter and press SET.

3. The “PAS” label will be shown, then “0--” with

0 blinking.

4. Insert “321” password through UP and

DOWN buttons, then press SET to confirm.

7.6 HOW TO: CHANGE A PARAMETERS VALUE

To change the parameter’s value operate as

follows:

1. Enter the Programming mode by

pressing the Set and DOWN button for

about 3s.

2. Select the required parameter.

3. Press the SET button to display the value.

4. Use UP or DOWN to change the value.

5. Press SET to store the new value and move to the following parameter.

To exit: Press SET + UP or wait 30s without pressing any button.

NOTE: the set value is stored even when the procedure is exited by waiting the time-out to expire.

8. PARAMETER LIST

NOTE: All pressure parameters are relatives or absolutes depending on the PrM parameter.

REGULATION

FtY Kind of gas: (R22, 134, 404, 407, 410, 507, CO2) type of gas used by plant. This is a

fundamental parameter for correct functioning of all system.

PEo Probe Error opening percentage: (0 to 100%) if a temporary probe error occurs, valve

opening percentage is PEo until PEd time is elapsed. If PEO is different from 0 it

assures cooling also with probe error, because even if the device cannot calculate

superheat the valve can work at PEo percentage.

PEd Probe Error delay before stopping regulation: (0 to 239sec; 240=On=unlimited) if

probe error duration is higher than PEd, valve will close completely and “Pf” message will

be showed. With PEd=on, valve opening is PEo until probe error finishes.

tEU Type of Stepper motor: (UP; bP) it permits to select the kind of valve. UP = 5-6 wires

unipolar valves; bP = 4 wires bipolar valves. !!!!! WARNING !!!!! by changing this

parameter the valve has to be reinitialized.

tEP Predefined valve selection: (0 to 13) if tEP=0 the user has to modify all the

parameters of configuration in order to use the valve. If tEP is different from 0 the

device performs a fast configuration of the following parameters: LSt, USt, Sr, CPP,

CHd. To select the right number please read the following table:

tEP Model

LSt

(steps*10)

uSt

(steps*10)

CPP

(mA*10)

CHd

(mA*10)

(step/s)

0 Manual settings Par Par Par Par Par

1 Alco EX4-EX5-EX6 5 75 50 10 500

2 Alco EX7 10 160 75 25 500

3 Alco EX8 500 10 260 80 50 500

4 Danfoss ETS-25/50 7 262 10 10 300

5 Danfoss ETS-100 10 353 10 10 300

6 Danfoss ETS-250/400 11 381 10 10 300

7 Sporlan SEI 0.5-11 0 159 16 5 200

8 Sporlan SER 1.5-20 0 159 12 5 200

9 Sporlan SEI 30 0 319 16 5 200

10 Sporlan SER(I) G,J,K 0 250 12 5 200

11 Sporlan SEI 50 0 638 16 5 200

12 Sporlan SEH(I) 100 0 638 16 5 200

13 Sporlan SEH(I) 175 0 638 16 5 200

If tEP is different from 0, previous configuration of LSt, uSt, Sr, CPP and CHd will be overwritten.

HFS Kind of motor movement: (HAF; FUL)

 HAF = half step. Use this setting for the unipolar valve.

 FUL = half step. Use this setting for the bipolar valve.

LSt Minimum number of steps: (0 to USt (*10)) it permits to select the minimum number

of steps. At this number of steps the valve should be closed. So it’s necessary the

reading of manufacturer datasheet to set correctly this parameter. It’s the minimum

number of steps to stay in advised range of functioning. !!!!! WARNING !!!!! after

changing this parameter the valve will have to be reinitialized. The device

performs this procedure automatically and restarts its normal functioning when

the programming mode ends.

USt Maximum number of steps: (LSt to 800 (*10)) it permits to select the maximum

number of steps. At this number of steps the valve should be completely opened. Read

the datasheet provided by manufacturer of the valve to set correctly this parameter. It’s

the maximum number of steps to stay in advised range of functioning. !!!!! WARNING

!!!!! after changing this parameter the valve will have to be reinitialized. The

device performs this procedure automatically and restarts its normal functioning

when the programming mode ends.

ESt Extra step in closing phase: (0 to 255 (*10)) it sets the number of extra steps the

controller performs, when the valve is closed at start up, to force the closure of the valve.

Sr Step rate: (10 to 600 step/sec) it is the maximum speed to change step without losing

precision (=losing steps). It’s advised to stay under the maximum speed.

CPP Current per phase (only bipolar valves): (0 to 100 (*10mA)) it is the maximum

current per phase used to drive valve. It’s used only with bipolar valves.

CHd Holding current per phase (only bipolar valves): (0 to 100 (*10mA)) it is the current

per phase when the valve is stopped for more than 4 minutes. It’s used only with

bipolar valves.

oPE Start opening Percentage: (0 to 100%) opening valve percentage when start function

is active and during post defrost phase. This phase duration is SFd time.

SFd Start Function duration: (0.0 to 42min 00s, res. 10s) it sets start function duration and

post-defrost duration. During this phase the alarms are neglected.

Sti Stop regulation interval: (0.0 to 24h 00min. res. 10min) after regulating continuously

for Sti time, the valve closes for Std time in order to prevent ice creation.

Std Stop duration: (0 to 60 min) it defines stop regulation time after Sti. During this stop

display shows StP message.

MnF Maximum opening percentage at normal Functioning: (0 to 100%) during

regulation it sets the maximum valve opening percentage.

FoP Forced Opening percentage: (0 to 100; nU) if FoP=nU valve works with regulation

algorithm. If FoP is different from nU the valve stays at FoP opening percentage. This

function could be useful during plant starting or during service operations.

PI PARAMETERS (trained staff)

Proportional band:

(0.1 to 50.0°C; 1 to 90°F)

PI proportional band. A value

bigger than 5°C is advised.

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