Danfoss EET Series User Manual

Automatic Heater Control
Table 22: Automatic Heater Control
Parameter name
Code
Default
value
Min.
Max.
Description
Automatic Heater Control
AHC
Automatic Heater Control Mode
AuH
No
No
Yes
Automatic Heater Control / dual mode protects food items stored in cabinets instal-
led outdoors from freezing during winter. Automatic Heater Control uses the defrost
heater to increase the cabinet temperature when it goes below the cut-out temper-
ature during Cooling mode.
No: this feature is disabled
Yes: this feature is active
Heater low set point (°C)
CHI
-100
-100
120
Heater cut-out temperature at coldest position of the spindle (thermostat knob) au-
to heating.
Heater high set point (°C)
WHI
-100
-100
120
Heater cut-out temperature at warmest position of the spindle (thermostat knob)
auto heating.
Heater low dierential (K)
CDH
2
1
50
It the dierence between the heater cut-out and cut-in at the coldest position of
thermostat for auto heating.
Heater high dierential (K)
WDH
2
1
50
It the dierence between the heater cut-out and cut-in at the warmest position of
thermostat for auto heating.
Energy mode delay (Mins)
End
60
0
360
This is the delay in minutes between the heater and the compressor operation. The
heater is not allowed to start until the number of minutes has expired after the com-
pressor has cut out and vice versa.
System protection
Table 23: System protection
Parameter name
Code
Default
value
Min.
Max.
Description
System Protection
SyP
Voltage Protection function
uPt
No
No
Yes
This feature protects the compressor if the line voltage goes beyond the operating
range
Minimum Cut-in Voltage
uLi
100
70
230
The lowest voltage at which the compressor is allowed to cut-in
Minimum Cut out Voltage
uL0
90
70
225
If the voltage goes below this value when the compressor is running, the compres-
sor will be switched o. It is to avoid sudden switching on and o of the compressor
due to voltage uctuations. This cut-o voltage will override the compressor mini-
mum run time
Maximum cut out Voltage
uHi
260
110
270
When the compressor is running, it will be switched o if the voltage exceeds this
value, if the compressor is already stopped, it will remain switched o
Condenser Alarm Limit (°C)
CAL
80
0
120
It sets the condenser temperature at which an alarm will be generated
Condenser Block Limit (°C)
CbL
85
0
120
It sets the compressor switched o due to high condenser temperature
Condenser OK Limit (°C)
CoL
60
0
120
It sets the compressor to switch on again after having been switched o due to high
condenser temperature, respecting the minimum compressor stop time
Control sensor error handling type
EHd
Aut
no
Aut
Method to control the cooling cycle in case of cabinet air sensor error:
"No" : no sensor error handling
"SEt" : follow congured error run and stop time
"Aut" : control automatically based on past cycles time
Error Run Time (Mins)
Ert
0
0
60
Cooling cycle ON time in case of cabinet sensor error (active only if EHd=SEt)
Error Stop Time (Mins)
Est
0
0
60
Cooling cycle OFF time in case of cabinet sensor error (active only if EHd=SEt)
Zero Cross Cong
ZC
Yes
No
Yes
It enhances the relay life and avoids relay sparks during relay ON and OFF. If “Yes” is
selected, relays will be switched ON and OFF when the line voltage is closer to zero
© Danfoss | Climate Solutions | 2023.07 BC320944106159en-000301 | 25
Refrigeration controller, type EET series

Danfoss EET Series Specifications

General

Brand	Danfoss
Model	EET Series
Category	Controller
Language	English