Product Overview
Table Of Contents
© Danfoss | DCS | 2019.04
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C
DKRCC.PD.RS0.A4.02 | 70
ID Symptom Possible cause / Reaction Solution
24 Fluctuating pressure
signal
Change in load of the system. • Observe the change in the load of the system.
Faulty pressure sensor. • Replace faulty pressure transmitter.
Flash gas in the system. • Check the section ash gas.
25 Compressor thermal cut
out (Mop is not working
or going higher than set
value)
MOP is not enable, or wrongly dened. • Check mop settings.
Change in operating condition. • Observe the operating condition.
• Controller need time to adjust to the stable condition.
26 LOP protection doesn’t
work at low pressure
if low superheat and low suction pressure
exist same time for some time, LOP function is
disabled.
• Check operating condition and settings.
Fast change in operating condition. • Controller need time to adapt to the change condition.
27 Controller is in safe state
(check LED or display)
Internal error i.e. eeprom error in controller
software exceptions.
• The controller must be power cycle, if continue to get the same
error then replace controller.
28 Controller freeze.
nothing happens
loose connections. • Check the connection in the EKE.
Incorrect voltage supplies to the controller. • Check the power supply and measure input voltage to the controller.
• Power cycle controller and observe the LEDs, IF no LEDs are not
lighting during power cycle, replace controller.
29 No communication
(Indicated by LEDs)
Wrong Modbus settings. • Check Modbus address, baud rate, and protocol.
• EKE only supports Modbus RS 485 RTU, it does not support
Modicon conventions.
Loose connection or no termination. • Check the Modbus terminals and use terminations.
Check power supply to EKE controller • If o, power on the controller