Danfoss EKC 326A User Manual page 8

Max. pressure in the receiver
The function monitors the pressure in the receiver and will initiate the closing of the
ICMTS valve if the pressure exceeds the preset value. The value must be at least one
bar over the reference. The function is not activated when 'n59' is set to 0.
(If n70 is active and attempts to open the valve, n58 will not be active.)
P-band to force closing the ICMTS-valve if the receiver pressure is too high
P-band over "n58, Prec Max" when the valve is forced closed.
If the pressure becomes 'n58' plus 'n59' , the ICMTS valve will be closed.
The closing of the valve will take place under controlled conditions.
Miscellaneous
Digital input signal - DI (terminal 1 and 2)
The controller has a digital input which can be used for one of the following func-
tions:
0: The input is not used
1: External main switch (se also r12)
2: Increasing the pressure in the gas cooler (additional cooling capacity). (closed DI =
additional capacity)
Address
If the controller is built into a network with data communication, it must have an
address, and the master gateway (system unit) of the data communication must then
know this address.
These settings can only be made when a data communication module has been
mounted in the controller and the installation of the data communication cable has
been completed.
This installation is mentioned in a separate document "RC8AC"
The address is set between 0 and 119 (999)
The address is sent to the gateway when the menu is set in pos. ON
(The setting will automatically change back to Off after a few seconds.)
Frequency
Set the net frequency.
Pressure transmitter definition for Pgc. Pressure transmitter lower limit
Pressure transmitter definition for Pgc. Pressure transmitter upper limit
Pressure transmitter definition for Prec. Pressure transmitter lower limit
Pressure transmitter definition for Prec. Pressure transmitter upper limit
Alarm settings
Pgc Min alarm limit
An alarm is issued if the value is exceeded
Permitted variation in relation to Pgc reference
An alarm is issued if the Pgc pressure falls below or exceeds the permitted variation,
but only once the delay time has expired. This is an 'A94 PgcRef alarm' .
Permitted variation in relation to the Prec reference
An alarm is issued if Prec pressure exceeds or falls below the permitted variation, but
only once the delay time has expired. This is an 'A95 PrecRef alarm' .
Delay time for 'A94 PgcRef alarm'
Delay time for 'A95 PrecRef alarm'
Service
A number of controller values can be printed for use in a service situation
Read input voltage at Ai-input
Read status of input DI (start/stop input)
Opening degree for ETS (CCM) valve
Calculated reference for regulation (desired pressure in the gas cooler)
The output signal to the high pressure valve ICMTS converted into opening degree
The temperature in the gas cooler. Measured using temperature sensor Sgc.
The pressure in the gas cooler. Measured using pressure transmitter Pgc.
The pressure in the receiver. Measured using pressure transmitter Prec, but only if it is
mounted.
8 Manual RS8FM602 © Danfoss 02-2016
n58 Prec Max
n59 PrecMaxPband
o02 DI Config
Following installation of a data com-
munication module, the controller can
be operated on a par with the other
controllers in ADAP-KOOL® refrigera-
tion controls.
o03 -
o04 -
o12 50 / 60 Hz
(50=0, 60=1)
o20 MinTransPgc
o21 MaxTransPgc
o47 MinTransPrec
o48 MaxTransPrec
Alarm settings
A65 PgcMin AlLim
A66 PgcAl Limit
A67 PrecAl Limit
A68 PgcAlDelay
A69 PrecAlDelay
u07 AI Volt
u10 DI
u24 Vgbp OD %
U03 Pgc Ref
U04 Vhp OD %
U05 Sgc temp.
U06 Pgc bar
U07 Prec bar
EKC 326A