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W i r i n g : U p p e r b o a r d ( E X D - H P 2 ) :
PT5(N)
NOTE:
•
Upper board is only for function of superheat control.
•
Upper board does not need to be wired if the circuit 2 is disabled.
P r e p a r a t i o n f o r S t a r t - u p :
•
Vacuum the entire refrigeration circuit.
•
WARNING: Electrical Control Valves EXM/EXL or EXN are delivered partially
open position. Do not charge system with refrigerant before closure of valve.
•
Apply supply voltage 24 V to EXD-HP1/2 while the digital input (DI1/DI2) is OFF (open).
The valve will be driven to close position.
•
After closure of valve, start to charge the system with refrigerant.
S e t u p o f p a r a m e t e r s :
(need to be checked/modified before start-up)
•
Make sure that digital input (DI1/DI2) is off (open). Turn the power supply ON.
•
Four main parameters Password (H5), type of function (1uE), refrigerant type (1u0/2u0)
and pressure sensor type (1uP/2uP) can be set only when digital input DI1/DI2 is off
(open) while the power supply is ON (24 V). This feature is for added safety to prevent
accidental damage of compressors and other system components.
•
Once the main parameters have been selected/saved the EXD-HP1/2 is ready for start-
up. All other parameters can be modified at any time during operation or standby if it is
necessary.
Emerson Climate Technologies GmbH
Pascalstrasse 65 I 52076 Aachen I Germany
O P E R A T I N G I N ST RU C T I O N S
EXD-HP1/2 Controller with
ModBus communication capability
www.climate.emerson.com/en-gb
D i s p l a y / k e y p a d u n i t ( L E D s a n d b u t t o n f u n c t i o n s ) :
ON: Data display
ON: Data display
Circuit 1
Circuit 2
Blinking: valve is opening
Blinking: valve is closing
ON: valve is fully open
ON: valve is fully close
P r o c e d u r e f o r p a r a m e t e r m o d i f i c a t i o n :
The parameters can be accessed via the 4-button keypad. The configuration parameters
are protected by a numerical password. The default password is "12". To select the
parameter configuration:
•
Press the
button for more than 5 seconds, A flashing "0" is displayed
•
Press
until "12" is displayed; (password)
•
Press
to confirm password
•
Press
or
to show the code of the parameter that has to be changed
•
Press
to display the selected parameter value
•
Press
or
to increase or decrease the value
•
Press
to temporarily confirm the new value and display its code
•
Repeat the procedure from the beginning "press
To exit and save the new settings:
•
Press
to confirm the new values and exit the parameters modification procedure.
•
To exit without modifying/saving any parameters:
•
Do not press any button for at least 60 seconds (TIME OUT).
Reset all parameters to factory setting:
•
Make sure that digital input (DI1/DI2) is Off (open).
•
Press
and
together for more than 5 seconds.
•
A flashing "0" is displayed.
•
Press
or
until the password is displayed (Factory setting = 12).
•
If password was changed, select the new password.
•
Press
to confirm password
•
Factory setting are applied
NOTE: In standard mode the actual superheat is shown at the display. In case of liquid
injection and economizer function this change to discharge temperature.
•
To display other data of circuit 1 of EXD-HP1/2 or 2 of EXD-HP2:
Press
and
together for 3 seconds to show data of circuit 1
Press
and
together for 3 seconds to show data of circuit 2
•
To display data of each circuit: Press the
according to the below table appears. Release the
data will appear. By repeating above procedure, variable data can be displayed in a
sequence as Measured superheat (K) → Measured suction pressure (bar) → Valve
position (%) → Measured suction gas temperature (°C) → Calculated saturated
temperature (°C) → Measured discharge temperature (°C) (if economizer function is
selected) →REPEATING....
Variable data
Circuit 1 (EXD-HP1/2)
Default Superheat K
1
Suction pressure bar
1
Valve position %
1
Suction gas temp °C.
1
Saturation temp. °C
1
Discharge temp. °C
1
NOTE 1: Discharge temp. is available only if economizer function is selected.
NOTE 2: After 30 minutes, display reverts to index 0.
Manual alarm reset/clearing functional alarms (except hardware errors):
•
Press
and
together for 5 seconds. When the clearing is done, "CL"
message appears for 2 seconds.
OI_EXD-HP12_A1_A2L_A3_EN_DE_RU_Rev08_865921.docx
ON: alarm
ON: ModBus
OFF: no alarm
communication
Next parameter/
value (higher)
Next parameter/
value (lower)
Selecting/
confirming
Parameters setting/saving
or
to show..."
button for 1 second until index number
button and the next variable
Circuit 2 (EXD-HP2)
0
2
1
2
2
2
3
2
4
2
-
5
Date: 30.06.2022
EN
0
1
2
3
4
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