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Appendix 1

Interaction between internal and external Main switch.

(Only when using the Modbus communication)

Main switch (r12)

External main switch (DI) 

(if enabled be setting 

register 64100 = 1)

Super Heat

Regulation

Alarm

monitoring

Off

Off

Off

No

Off

On

On

Yes

On

Off

Off

No

On

On

On

Yes

Appendix 2 

Bit 15

Bit 14

Bit 13

Bit 12

Bit 11

Bit 10

Bit 9

Bit 8

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Unused

MOP

Active

Close

Timer 

active

Sensor Errors

Control state

Variables / parameters

CTRLstatus :

bit 0…3 : Controlstate

0: closed

1: Error

2: Inject

3: De-humidify

4: Force OD

5: Defrost state

6: Hold1 state (defrost sequence)

7: Hold2 state (defrost sequence)

8: Startup stage

9 -15: unused

bit 4 …7: Sensor Errors

bit 4 : Te error

bit 5 : S2 error

bit 6 : S4 error, (not active)

bit 7 : (not active)

bit 8 : Close timer

bit 8:  timer active

bit 9 : MOP

bit 9 : MOP active.

bit 10…15: unused

16 

DKRCC.PS.RQ0.B7.02 /520H8832  

© Danfoss A/S (AC-MCI / sw), 2014-11

Manual 

Superheat Controller EIM 336

Summary of Contents for EIM 336

Page 1: ...ess noise The EIM 336 is the superheat controller that can be used to control the opening degree of a valve based on the superheat of the evaporator This is applicable in applications such as air cond...

Page 2: ...allation sensors 17 Warnings 17 Acronyms and abbreviations used in this manual LOC Loss of charge indication SH Superheat MOP Maximum operating pressure MSS Minimum stable superheat Te Saturated sucti...

Page 3: ...densed Superheat close When the superheat is below a set minimum value the valve will close faster in order to protect the compressor from the risk of getting liquid in the suction line Manual control...

Page 4: ...S2 PT1000 S4 PT1000 or digital input from external contact EEV driver Max current 150 mA EEV Uni or bipolar coil Data communication RS485 Modbus RTU Environment Storage 34 C to 71 C 30 F to 160 F Ope...

Page 5: ...odbus address stored in PNU no 40041 default 165 Jumper not mounted Outdoor unit condenser Modbus address stored in PNU no 40042 default 164 Com KM5 1 Drain D 2 RS485 TxD RxD 3 RS485 TxD RxD 4 Not Use...

Page 6: ...trol mode does not depend on the r12 Main Switch and will set the opening degree regardless of its setting Setting o18 Manual ctrl to 0 again the controller will assume normal control and will open or...

Page 7: ...secondary address is 164 Note Changes to these parameters will become active immediately This means that a modbus tool or controller that changes these settings will loose connection to the EIM 336 an...

Page 8: ...e controller is powered the valve will first be closed fully so that the controller starts from a known opening degree 0 In order to make sure that it is fully closed the valve will be closed 100 plus...

Page 9: ...sensor value will be used 5 Configuring the superheat control The superheat control algorithm will attempt to regulate the superheat down to the lowest stable value between the minimum superheat sett...

Page 10: ...um operation pressure If Pe goes above this value the controller will control on Pe and not on superheat Kp MOP 3113 Kp proportional gain while in MOP control mode Tn MOP 3114 Tn integration time whil...

Page 11: ...05 Timer to trigger LOC alarm LOC Alarm 50006 Loss of charge alarm flag 0 no alarm 1 LOC alarm LOC SH Trig 50007 SH error trigger level for LOC alarm LOC Tmr 3102 Loss Of Charge time readout displays...

Page 12: ...t regulation response Very low value give the risk of unstable regulation For Danfoss only 3105 SHL SH Low 3 20 6 K Superheat low setting for non linear control 3106 SHH SH High 8 40 16 K Superheat hi...

Page 13: ...ext S2 temp 200 200 0 C External S2 This value can be used instead of a sensor This register must be written at least every 5 seconds otherwise the sensor value will be used 2646 TS4 ext S4 Air temp 2...

Page 14: ...ain Switch 64309 Manual OD as steps 0 1 0 Enable the manual OD in o45 to be entered as halfsteps Readouts are still in percent Service Alarm 2046 RAL Reset alarm 0 1 0 1 clear alarm 20001 EKC Error 0...

Page 15: ...troller will go to either the low or high boundary de pending on the error The highest value will be shown if the signal is above the maximum value The lowest value will be shown if the signal is belo...

Page 16: ...it 3 Bit 2 Bit 1 Bit 0 Unused MOP Active Close Timer active Sensor Errors Control state Variables parameters CTRLstatus bit 0 3 Controlstate 0 closed 1 Error 2 Inject 3 De humidify 4 Force OD 5 Defros...

Page 17: ...ght after the evaporator If the measured value is 1 2 K lower than the actual value of Pe right after the evaporator it may cause the evaporator to flood This is the case when the pressure transmitter...

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