Emerson ECD-002 Instruction Sheet page 3

Main parameters (must be checked and modified if necessary)
Code Parameter description & choices
H5 Password
u0 System Refrigerant
0 = R22; 1 = R134a; 2 = R507; 3 = R404A;
5 = R410A; 6 = R124; 7 = R744 (subcritical application)
uP Installed pressure sensor type
0 = PT4-07M (for R22/R134a/R507/R404A/R407C/R124)
1 = PT4-18M (for R410A)
2 = PT4-30M (for R744, subcritical)
ut Installed valve type
1 = EX4; 2 = EX5; 3 = EX6;
Mounting of ECD-002
ECD-002 can be installed at any time also during operation.
• ECD-002 can be mounted in
panels with 2.8x1.1 in cutout
• Push controller into panel cut-
out.(1)
• Make sure that mounting lugs are
flush with outside of controller
housing
• Insert allen key into front panel
holes and turn clockwise. Mount-
ing lugs will turn and gradually
move towards panel (2)
• Turn allen key until mounting lug
barely touches panel. Then move
other mounting lug to the same
position (3)
• Tighten both sides very carefully
until keypad is secured. Do not
over tighten as mounting lugs will
break easily.
Error/Alarm Handling
Alarm
code Description
E0 Pressure transmitter error
E1 Temperature sensor error
Π
A EX4...EX8 electrical
connection error
AL Low superheat (<1°F)
AL blinking
Ab
Ab Battery error
Ab blinking
Er Data error display –
out of range
Note: When multiple alarms occur, the highest priority alarm is displayed until being cleared,
then the next highest alarm is displayed until all alarms are cleared. Only then will param-
eters be shown again.
Checking system operating conditions
The data to be permanently shown on the display can be selected by the user
┌┘
(parameter 1). It is possible to temporarily display these values. However,
this function is not available in an alarm condition. The display will show for
Service/Troubleshooting
Symptom
Operating superheat is several degrees higher or
lower than set-point
Operating superheat is too low i.e. compressor wet running
Valve is not fully closed
Instable superheat (hunting)
Valve opens when EC3 commands to close and vice versa
EX8 is not able to open at high differential pressure
Superheat set-point is shifting after several months of
uninterrupted operation or permanent jumper of 24V
digital input
Factory Field
Min Max Setting Setting
1 199 12
0 7 1
4 = R407C;
0 1 0
1 5 5
4 = EX7; 5 = EX8
Related Alarm
parameter relay Valve
- Signalling Fully close
- Signalling Fully close
- Signalling -
uL: 1 Signalling Fully close
uL: 2 Signalling Fully close
b1: 1 - Regulating
b1: 2 Signalling Fully close
b1: 3 Signalling Fully close
- - -
Incorrect signal from pressure or
temperature sensors
1- Incorrect wiring of ECVs
2- Defective sensors
1- The digital input is ON (24V)
2- Wrong setting of parameter ut.
Evaporator is designed to operate
at higher superheat
Wrong wiring between EC3-X33
and valve
Wrong setting of parameter ut
Stepper motor driven valves
require synchronization
Optional parameters
(recommended factory setting for majority of applications)
Code Parameter description & choices
uu Start valve opening (%)
u9 Start opening duration (second)
uL Low superheat alarm function
0 = disable (for flooded evaporator)
1 = enable auto reset
Cut-out at 1°F (if it maintains 1 min.); Cut-in immediately at 6°F
u5 Superheat set-point (°F)
If uL enabled (auto or manual)
If uL disabled
u2 MOP function
0 = disable 1 = enable
u3 MOP set-point (°F) saturation temperature
Factory setting is according to selected refrigerant (u0):
+55°F for R22 +59°F for R134a
+45°F for R404A +59°F for R407C
+122°F for R124 +23°F for R744
5 Units conversion (only for u3, u5,
┌┘
0 = °C, K, bar
(Psig values are divided by 10. Example: Display 12.5 is 125 psig)
1 Value to show
┌┘
0 = Measured superheat (F) 1 =
2 = Valve opening (%)
4 = calculated evaporating temperature (°F) from the pressure
b1 Battery error management, when battery
is defective (EC3-X33 only), see below:
Alarm
Value Display Alarm Relay
0 –
1 Ab
2 Ab
3 Ab
(blinking)
* Min. and Max. setting values are dependant to selected type of refrigerant.
What to do?
Check wiring connection and measure the signal 4 to 20 mA
Check wiring connection and measure the resistance of sensor
Check wiring connection and measure the resistance of winding
Check wiring connection and operation of valve
Battery potentially does not have enough charge to close valve in case
of main power supply interruption. May occur temporarily with new
controllers or after long storage but should disappear when battery is
charged sufficiently. If Ab remains active even when battery is charged,
battery may be defective and should be replaced.
Data send to the display is out of range. Check temperature
and pressure sensor.
Message
— No data to display
The display will show an "—" at start up and when no data is sent to ECD-002
one second the numerical identifier of the data (see
the selected data. After 5 minutes, the display will return to the value selected
┌┘
by parameter 1.
Cause
1- Check the sensors
2- Make sure ECN-N60 temperature sensor is used
3- For optimum accuracy, please use:
PT4-07M for R22/R134a/R507/R404A/R407C/R124
PT4-18M for R410A
PT4-30M for R744
4- Make sure the sensor cables are not installed along
with other high voltage cables
1- Check the wiring
2- Check the sensor
1- Valve is shut off only when the digital input is turned off (0V)
2- Check the setting of parameter ut
Increase the superheat set-point
Correct the wiring
Check the parameter ut. (Larger valve requires higher torque
and higher current)
Do not apply permanent 24V digital input. Interrupt digital input
3
once every week for 5 seconds if compressor never stops.
Factory Field
Min Max Setting Setting
10 100 50
1 30 5
0 2 1
2 = enable manual reset
5.4 54 10.8
0.9 54 10.8
0 1 1
* * X
+45°F for R507
+59°F for R410A
1) 0 1 0
┌┘
1 = °F, R, psig
0 4 0
Measured evaporator pressure (psi)
3 = Measured coil-out temp. (°F)
0 3 2
Reset possibility after
Valve recovery/replacement
– Regulating –
– Regulating –
Signalling Fully close Auto
Signalling Fully close Manual
Requires manual reset
after resolving alarm
No
No
No
No
Yes
Yes
No
┌┘
1 parameter) and then
Action
-
-