Emerson EC3-X33 Mode D'emploi page 3

E r r o r / A l a r m h a n d l i n g :
Alarm
Description
code
Pressure transmitter
E0
error
Temperature sensor
E1
error
EXV electrical
AΠ
connection error
Low superheat
AL
(<0,5K)
AL
blinking
Ab
Battery error
Ab
Ab
blinking
Data error display -
Er
out of range
No data to display
---
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 parameters be shown again.
C h e c k i n g s y s t e m o p e r a t i n g c o n d i t i o n s :
The data to be permanently shown on the display can be selected by the user (parameter ┌┘1). It is possible to temporarily display other values. However this function is
not available in an alarm condition. The display will show for one second the numerical identifier of the data (see ┌┘1 parameter) and then the selected data. After 5
minutes, the display will return to the value selected by parameter┌┘1.
S e r v i c e / T r o u b l e s h o o t i n g :
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 24 V digital
input
Emerson Climate Technologies GmbH
Am Borsigturm 31 I 13507 Berlin I Germany
EC3-X33 Superheat Controller and ECD-002
Keypad / Display Unit
Related Alarm
Valve
parameter relay
- Signalling Fully close
- Signalling Fully close
- Signalling -
uL: 1 Signalling Fully close Check wiring connection and operation of valve
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 EXVs
2- Defective sensors
1- The digital input is ON (24 V)
2- Wrong setting of parameter ut.
Evaporator is designed to operate at
higher superheat
Wrong wiring between EC3-X3...
and valve
Wrong setting of parameter ut
Stepper motor driven valves require
synchronization
www.emersonclimate.eu
Operating instruction
Check wiring connection and measure the signal 4...20 mA
Check wiring connection and measure the resistance of sensor
Check wiring connection and measure the resistance of winding
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. (Replacement kit: 807 790).
Data send to the display is out of range. Check temperature and
pressure sensor.
Check Cable and plug connection between EC3-X3... and
ECD-002
Cause
1- Check the sensors
2- Make sure ECN-N60 temperature sensor is used
3- For optimum accuracy, please use:
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 (0 V)
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 24 V digital input. Interrupt digital input
once every week for 5 seconds if compressor never stops.
Date: 03.04.2017
What to do?
Action
PT5-07x (for R22 / R134a / R507 / R404A / R407A / R407C /
R407F / R124 / R448A /R449A / R450A / R513A /
R1234ze)
PT5-18x (for R410A/ R32)
PT5-30x (for R410A / R744 / R32)
PT5-50x (for R744)
EC3-X33_OI_ML_R12_865009.docx
Requires manual
reset after resolving
alarm
No
No
No
No
Yes
-
-
Yes
No
No