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Selection for both circuits and discharge temperature control
Code
Parameter description and choices
Et
Valve type
0 = EXM / EXL
1 = EXN (not permitted for R454A)
NOTE: EXD-HP2 can drive two similar valves i.e. both valves must be either
EXM/EXL or EXN.
1E3
Discharge Temperature Setpoint
Start Setpoint
1E4
Discharge Temperature Control band
1E5
Discharge Temperature limit
1E6
Max. condensing pressure
1E7
Injection Pressure Limit
1E8
High injection pressure alarm delay (s)
M O P T a b l e ( ° C )
Refrigerant
Min.
Max.
R22
-40
+50
R134a
-40
+66
R410A
-40
+45
R32
-40
+30
R407C
-40
+48
R290
-40
+50
R448A
-57
+66
R449A
-57
+66
E r r o r / A l a r m H a n d l i n g
Alarm code Description
1E0/2E0
Pressure sensor 1/2 error
1E1/2E0
Temperature sensor 1/2 error
Discharge hot gas
1Ed
temperature sensor 3 error
EXM/EXL or EXN electrical
1Π-/2Π-
connection error
Discharge hot gas
1Ad
temperature above limit
1AF/2AF
Freeze protection
1AF/2AF
blinking
1AL/2AL
Low superheat
1AL/2AL
(<0,5K)
blinking
1AH/2AH
High superheat
1AP/2AP
Low pressure
1AP/2AP
blinking
High injection pressure
1Ai
circuit 1
Failed
Err
uploading/downloading
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.
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
ModBus communication capability
Min
0
70
2
100
10
10
1
Factory
Refrigerant
Min.
setting
+15
R452A
-45
+15
R454A
-57
+15
R454B
-40
+15
R454C
-66
+15
R513A
-57
+15
R452B
-45
+12
R1234ze
-57
+12
R1234yf
-52
Related
Alarm relay Valve
parameter
-
Triggered
-
Triggered
-
Triggered
-
Triggered
Triggered
1P4/2P4: 1
Triggered
1P4/2P4: 2
Triggered
1uL/2uL: 1
Triggered
1uL/2uL: 2
Triggered
1uH/2uH: 1
Triggered
1P9/2P9: 1
Triggered
1P9/2P9: 2
Triggered
1E7 / 1E8
Triggered
-
-
www.climate.emerson.com/en-gb
EXD-HP1/2 Controller with
C o n t r o l ( v a l v e ) s t a r t - u p b e h a v i o r :
(Parameter 1uu/2uu and 1u9/2u9)
Factory
Max
setting
1
0
1uu/2uu:
Min.:
10% (<1 sec.)
Default: 20% (< 1.5 sec.)
Max.:
100% (< 6 sec.)
140
85
25
20
U p l o a d / d o w n l o a d K e y : F u n c t i o n
150
120
45
20
•
For serial production of systems/units, upload/download key allows the transmission of
1E6
20
configured parameters among range of identical systems.
300
60
U p l o a d i n g p r o c e d u r e :
(storing configured parameters in key)
Max.
Factory
•
Insert the key while the first (reference) controller is ON and press
setting
message appears followed by "End" message for 5 seconds.
+66
+15
•
Note: If the "Err" message is displayed for failed programming, repeat the above
+66
+10
procedure.
+45
+18
D o w n l o a d i n g p r o c e d u r e :
+48
+17
+66
+13
(configured parameters from key to other controllers)
• Turn off power to new controller
+66
+25
• Insert a loaded Key (with stored data from reference controller) into new controller and
+66
+24
turn on the power supply.
+66
+15
• The stored parameters of the key will be downloaded automatically into the new controller
memory; The "doL" message appears 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.
What to do?
Fully close Check wiring connection and measure the signal 4 to 20 mA
Fully close Check wiring connection and measure the resistance of sensor
Operating
Check wiring connection and measure the resistance of sensor
-
Check wiring connection and measure the resistance of winding
Check valve opening/ check liquid flow for flash gas free/check
Operating
discharge hot gas temperature sensor
Fully close
Check the system for cause of low pressure such as insufficient load
on evaporator
Fully close
Fully close
Check wiring connection and operation of valve
Fully close
Operating
Check the system
Operating
Check the system for cause of low pressure such as refrigerant loss
Operating
Operating
Check the system
-
Repeat again the procedure for uploading/downloading
OI_EXD-HP12_A1_A2L_A3_EN_DE_RU_Rev08_865921.docx
EN
button; the "uPL"
Requires manual reset
after resolving alarm
No
No
No
No
No
No
Yes
No
Yes
No
No
Yes
No
No
Date: 30.06.2022
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