Danfoss EKE 1C User Manual

8.1.7 Stop state alarm
Table 61: Stop state alarm
Label
Alarm
descrip‐
tion
Actions during ac‐
tive
Trigger (how the alarm IS
raised)
How to clear the alarm
Remark
W002
Standby
mode
Controller is in stop state
Controller not in stop state
The controller is standby due R012 Main
switch and/or DI main switch is o
8.1.8 Manual mode alarm
Table 62: Manual mode alarm
Label
Alarm description
Actions during ac‐
tive
Trigger (how the alarm IS
raised)
How to clear the alarm
Remark
W003
Manual control
Controller is in manual state
Controller not in manual state
The controller is manual control, no auto-
matic control is active, and many alarms
are disabled
8.2 Troubleshooting
Table 63: Troubleshooting
ID
Symptom
Possible cause/Reaction
Solution
1
Regulation does not start on
using control modes i.e.,
MSS
DI is not connected, if dened as ON/OFF hardware switch.
• Turn on DI switch.
Sensor / transmitter error.
• Check and clear alarm.
Alarm conguration conict i.e. S2 sensor not dened or
no refrigerant selected.
• Clear and clear Alarm.
Alarm: standby mode active i.e. Parameter R012 is OFF.
• Set R012 main switch to 1.
2
Suction pressure too low
Pressure drops across evaporator too high.
• Check refrigerant ahead of expansion valve, If valve is
placed much higher than condenser outlet.
• Check pressure dierence.
Lack of sub cooling ahead of expansion valve.
• Limit max opening degree of the valve setting in con-
troller.
• Check refrigeration system capacity and compare with
expansion valve capacity.
• Use proper valve size, Suitable for the system.
Evaporator superheat too high.
• Check the section " High Superheat".
Pressure drop across the expansion valve less than valve is
sized for.
• Check pressure drop across expansion valve. Replace
with larger valve.
Expansion valve too small.
• Check refrigeration system capacity and compare with
expansion valve capacity. Replace with larger valve if
necessary.
• Check selected valve type in the controller valve list.
Expansion valve block with foreign material.
• Remove valve and examine the orice /piston.
Wrong selection of Refrigerant in the controller settings.
• Choose the correct Refrigerant from the pre-dened
list.
Lack of Charge in the system.
• Charge the system with appropriate refrigerant capaci-
ty.
• Check for leakage in the system.
Pressure transmitter ranges or type is wrongly dened.
• Dene the correct pressure range.
MOP set point is dened very low.
• Check the MOP setting, if Modbus is used, check if the
values have been scaled as indicated in the parameter
list
Evaporator wholly or partly iced up.
• De-ice evaporator.
Low chilled water ow
• Check ow as per design
chilled water temp too low
• Check temp set points as per Design
3
Low pressure cut out due to
compressor cut in and cut
out
Missing start signal.
• Check for digital input DI signal or its settings.
Startup problem.
• Check section start- up problem and its solution.
Superheat controller, Type EKE 1A, 1B, 1C, 1D
© Danfoss | Climate Solutions | 2022.06 BC398828796060en-000101 | 76

Danfoss EKE 1C Specifications

General

Brand	Danfoss
Model	EKE 1C
Category	Controller
Language	English