Operating instructions
EXD-TEVI Economizer Controller with
ModBus Communication Capability
Emerson Climate Technologies GmbH www.emersonclimate.eu 3/3
Holzhauser Straße 180 I 13509 Berlin I Germany Date: 19.08.2014 EXD-TEVI_OI_EN_R02_865908.docx
Upload/download Key: Function
For serial production of systems/units, upload/download key allows the
transmission of configured parameters among range of identical systems.
Uploading procedure (storing configured parameters in key)
•
Insert the key while the first (reference) controller is ON and press button;
the “uPL” message appears very short followed by “End” message for 5
seconds.
• Note: If the “Err” message is displayed for failed programming, repeat the
above procedure.
Downloading procedure (configured parameters from key to other
controllers)
•
Turn off power to new controller
•
Insert a loaded Key (with stored data from reference controller) into new
controller and turn on the power supply.
•
The stored parameters of the key will be downloaded automatically into the new
controller memory. The “doL” message appears very short followed by a “End”
message for 5 seconds.
•
The new controller with new loaded parameters setting will start to operate after
“End” message disappears.
•
Remove the key.
Note: If the “Err” message is displayed for failed programming, repeat the above
procedure.
Insert programming key here
Error/Alarm handling:
Alarm
code
Description Alarm relay Valve
What to do?
Reset Type
1E0
EVI pressure sensor fail Triggered Fully close Check wiring connection and measure the signal 4 to 20 mA Auto
1E1
EVI suction temp. sensor fail Triggered Operating Check wiring connection and measure the resistance of sensor Auto
1Ed
Hot gas temp. sensor 1 fail Triggered Fully close Check wiring connection and measure the resistance of sensor Auto
2Ed
Hot gas temp. sensor 2 fail Triggered Fully close Check wiring connection and measure the resistance of sensor Auto
1Π -
EXM/EXL electrical connection error Triggered - Check wiring connection and measure the resistance of winding Auto
2Π -
EXM/EXL electrical connection error Triggered - Check wiring connection and measure the resistance of winding Auto
1Ad
Discharge hot gas 1 temperature above
limit
Triggered Operating
Check valve opening / check liquid flow for flash gas free / check
discharge hot gas temperature sensor
Auto
2Ad
Discharge hot gas 2 temperature above
limit
Triggered Operating
Check valve opening / check liquid flow for flash gas free / check
discharge hot gas temperature sensor
Auto
Err
Failed uploading / downloading - - Repeat again the procedure for uploading/downloading Auto
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.
Technical data:
Power supply 24VAC/DC ±10%; 1A
Power consumption EXD-TEVI: 20VA
Plug-in connector Removable screw terminals wire size 0.14 .. 1.5 mm
2
Protection class IP20
Digital Inputs Potential free contacts (free from voltage)
Temperature sensors ECN-N30 (T EVI)
For 86kΩ NTC Discharge Temperature sensors (T D1/T
documentation
Pressure sensor PT5
Output alarm relay SPDT contact 24V AC 1 Amp inductive load;
24V AC/DC 4 Amp resistive load
Activated/energized: During normal operation (no alarm condition)
Deactivated/de-energized:
During alarm condition or power supply is OFF
If the output relay is not utilized, the user must ensure appropriate
safety precautions are in place to protect the system.
Stepper motor output Coil: EXM-125/EXL-125
Valves: EXM-… /EXL-…
Marking
CE
,
Dimensions: [mm]
!
3535
Ø4,3
110
1
2
5
,
5
4
5
59,5
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