Product Overview

© Danfoss | DCS | 2019.04
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C
DKRCC.PD.RS0.A4.02 | 65
Label MODbus
PNU
Bit
No.
Alarm Description Actions during
active
Trigger (how the alarm is
raised)
How to clear the alarm Remark
APPLICATION ALARMS
A994 1902 8 Low S4 media outlet
temperature
Injection active and Min S4
function active and S4 below
MIN S4 set point - Low Min S4
band and Low Min S4 delay
expired
Injection not active or Min
S4 function disabled or S4
above MIN S4 set point -
Low Min S4 band
Media out temperature is below
alarm limit and alarm delay has
expired.
A991 1902 11 High evaporation
pressure (MOP)
Injection active and Mop active
and Te higher than mop set
point + MOP alarm dierential
and MOP alarm delay expired
Injection not active or
Mop disabled or Te below
mop set point + MOP
alarm dierential
Pe / Te is higher than alarm limit
and alarm delay has expired.
A990 1902 12 Low evaporation
pressure (LOP)
Injection active and Lop active
and Te lower than lop set point
- LOP alarm dierential and
Cond..temp alarm delay expired
Injection not active or
Lop disabled or Te above
lop set point + LOP alarm
dierential
Pe / Te is lower than alarm limit
and alarm delay has expired.
A989 1902 13 High condensing
temperature
Injection active and HCTP active
and Tc above HCTP set point +
Cond. temp.alarm dierential
and LOP alarm delay expired
Injection not active or
HCTP disabled or Tc below
HCTP set point + Cond.
temp.alarm dierential
Pc / Tc is higher than alarm limit
and alarm delay has expired.
A988 1902 14 High superheat Injection active and SH above
SH reference +High SH alarm
dierential and High SH alarm
delay expired
Injection not activeor SH
below SH reference +High
SH alarm dierential
Superheat is higher than alarm
limit and alarm delay has expired.
A987 1902 15 Low superheat Injection active and SH below
SH reference - low SH alarm
dierential and low SH alarm
delay expired
Injection not active or SH
above SH reference - low
SH alarm dierential
Superheat is below alarm limit and
alarm delay has expired.
A986 1902 0 Lack of valve capacity Injection active and OD higher
than max OD - 5% for more than
90 % of Lack of capacity alarm
delay time
Injection not active or
OD higher OD - 5% in
less than 88 % for Lack of
capacity alarm delay time
Valve is running close to full
capacity for long time.
E135 1904 12 Error in Heat/Cold in
thermostat mode
Use of DI as H/C function in
thermostat mode.
Avoid H/C function in DI
while in thermostat mode.
H/C function not avialable in
thermostat mode.
THERMOSTAT ALARMS
A993 1902 9 High temperature Thermostat active and
thermostat temperature (s4/
S3) above actual reference +
Upper temperature alarm for
Temperature alarm delay time
Thermostat not active or
thermostat temperature
(s4/S3) below actual
reference + Upper
temperature alarm
Thermostat temperature is higher
than alarm limit and alarm delay
has expired
A992 1902 10 Low temperature Thermostat active and
thermostat temperature (s4/
S3) below actual reference -
lower temperature alarm for
Temperature alarm delay time
Thermostat not active or
thermostat temperature
(s4/S3) above actual
reference - lower
temperature alarm
Thermostat temperature is lower
than alarm limit and alarm delay
has expired
STOP STATE ALARM
W002 1902 1 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
MANUAL MODE ALARM
W003 1902 2 Manual control Controller is in manual state Controller not in manual
state
The controller is manual control,
no automatic control is active and
many alarm are disabled