Operating instruction
EC3-P33 Superheat Controller and
ECD-002 Keypad / Display Unit
Installation in non explosive environment
Emerson Climate Technologies GmbH
www.emersonclimate.eu
Am Borsigturm 31 I 13507 Berlin I Germany
Date: 04.05.2017
EC3-P33_OI_ML_R01_865919.docx
E r r o r / A l a r m h a n d l i n g :
Alarm code
Description
Related
parameter
Alarm
relay
Valve
What to do?
Requires manual
reset after resolving
alarm
E0
Pressure
transmitter error
-
Signalling Fully close Check wiring connection and measure the signal 4…20 mA
No
E1
Temperature
sensor error
-
Signalling Fully close Check wiring connection and measure the resistance of sensor
No
AΠ
EXV electrical
connection error
-
Signalling
-
Check wiring connection and measure the resistance of winding
No
AL
Low superheat
(<0,5K)
uL: 1
Signalling Fully close
Check wiring connection and operation of valve
No
AL blinking
uL: 2
Signalling Fully close
Yes
Ab
Battery error
b1: 1
-
Regulating
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: 807790).
-
Ab
b1: 2
Signalling Fully close
-
Ab blinking
b1: 3
Signalling Fully close
Yes
Er
Data error display
- out of range
-
-
-
Data send to the display is out of range. Check temperature and
pressure sensor.
No
---
No data to display
-
-
-
Check Cable and plug connection between EC3-X33 and ECD-002.
No
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
Cause
Action
Operating superheat is several degrees higher or lower
than set-point
Incorrect signal from pressure or
temperature sensors
1- Check the sensors
2- Make sure ECN-N60 temperature sensor is used
3- For optimum accuracy, please use: PT5-30L-FLR
4- Make sure the sensor cables are not installed along with other
high voltage cables
Operating superheat is too low i.e. compressor wet
running
1- Incorrect wiring of ECV05A
2- Defective sensors
1- Check the wiring
2- Check the sensor
Valve is not fully closed
1- The digital input is ON (24 V)
2- Wrong setting of parameter ut.
1- Valve is shut off only when the digital input is turned off (0 V)
2- Check the setting of parameter ut
Instable superheat (hunting)
Evaporator is designed to operate at
higher superheat
Increase the superheat set-point
Valve opens when EC3 commands to close and vice versa Wrong wiring between EC3-P33 and
valve
Correct the wiring
Superheat set-point is shifting after several months of
uninterrupted operation or permanent jumper of 24 V
digital input
Stepper motor driven valves require
synchronization
Do not apply permanent 24V digital input. Interrupt digital input
once every week for 5 seconds if compressor never stops.
T e c h n i c a l d a t a
D i m e n s i o n s [ m m ] :
Power supply
24 VAC ±10%; 50/60 Hz; 1 A
EC3-P3
3
Power consumption
25 VA max.
including EX4-7-…FLR.
Plug-in connector
Removable screw terminals wire size 0.14…1.5 mm
2
Grounding
6.3 mm spade earth connector
Protection class
IP20
Connection to ECD-002
ECC-Nxx or CAT5 cable with RJ45 connectors
Digital Inputs
0/24VAC/DC for stop/start function
NTC input
EMERSON temperature sensor ECN-N60
4…20 mA Analog input
EMERSON PT5-30L-FLR Pressure Transmitter
4-20 mA Analog output
Deviation from input
signal
For connection to any 3
rd
party controller with
12/24 VDC power supply and appropriate burden
±8% max
ECD-002
Output alarm relay
SPDT contacts 24 VAC/DC, 2 Amp inductive load
Activated:
During normal operation (no alarm condition)
Deactivated:
During alarm condition or power supply is OFF
Stepper motor output for
EX4-7
Maximum current 0.8 A with nominal 24 VDC
operating voltage
Ambient temperature
range
0…+60°C
+1…+25°C (for best battery life time)
> 35°C battery life time < 2 years
Marking
