Danfoss AK-PC 530 User Manual

4 Manual RS8EJ302 © Danfoss 05-2010 AK-PC 530
Suvey of functions
The total function content is shown below – not all functions are present at the same
time. The setting of o61 determines which functions are present.
The menu overview on page 14 shows the various functions and settings.
Function
Para-
meter
Parameter by operation via
data communication
Normal display
If the two displays are mounted:
P0 will be shown on EKA 165 (the one with buttons)
Pc will be shown on EKA 163. Both readouts will be in temperature or in bar.
P0 °C or P0 b
Pc °C or Pc b
Compressor regulation reference Compressor control
P0 setpoint
Regulation is based on the set value plus an oset, if applicable. An oset can be cre-
ated from night setback r13 and/or from a system units override function.
r23 P0Set Point °C / P0Set Point b
Oset
The set reference may be displaced with a xed value when a signal is received at the
DI4 input or from the function "Night setback" (r27).
(Cf. also Denition of DI4 input).
r13 Night oset
Night setback
OFF: No change of the reference
ON: Oset value forms part of the reference
r27 NightSetBack
Reference
The regulation reference is shown here
r24 P0 ref. °C / P0 ref. b
Set point limitation
With these settings the setpoint can only be set between the two values.
(This also apply if regulation with displacements of the reference).
Max. permissible setpoint value. r25 P0RefMax °C / P0RefMax b
Min. permissible setpoint value. r26 P0RefMin °C / P0RefMin b
Neutral zone
There is a neutral zone around the reference. See also page 3.
r01 Neutral zone
Correction of pressure measurement
An oset adjustment of the registered pressure can be made.
r04 AdjustSensor
Unit
Here you can select whether the display is to indicate in SI units or US units.
0: SI (°C / bar)
1: US (°F / psig)
r05
(In AKM onlySI (bar and °C) is used,
whatever the setting)
Start/stop of refrigeration
With this setting the refrigeration can be started and stopped. Start/stop of refrigera-
tion may also be performed with an external contact function connected to the input
named “ON input”. (The input must be wired).
r12 Main Switch
Condenser regulation reference Condenser control
Pc setpoint
Regulation is based on the set value plus an oset, if applicable. An oset can be cre-
ated via the “r34” function and/or from a system units override function.
r28 PcSet Point °C / PcSet Point b
Oset
The set reference may be displaced with a xed value when a signal is received at the
DI5 input. (Cf. also Denition of DI5 input).
r34 PcRefOset
Pc reference variation. See also page 22
Regulation with setting 1 (or 2 if the reference is to vary with the outdoor tempera-
ture) will give the best regulation if the system is in balance. But if a lot of condenser
steps are cut in and out and the compressor capacity often becomes low, it will be
necessary to select setting 3 instead (or 4, if there is regulation with the outdoor tem-
perature). (Settings 3 and 4 will generally be preferable if a Pc-oset at max. compres-
sor capacity can be accepted).
1: No change of the reference. Regulation based on set setpoint. And oset with the
DI5 function is allowed.
2: Outdoor temperature forms part of the reference. The outdoor temperature is
measured with Sc3. When the outdoor temperature drops one degree, the reference
is lowered one degree.
Here is oset with the DI5 function not allowed. At DI5 signal the reference will
change to the set setpoint.
Setting 1 and 2 operate with a PI regulation, but if the system is unstable and the PI
regulation not satisfactory the I element may be left out, so that the controller will be
with P regulation only.
3: As 1, but with P regulation (xp-band)
4: As 2, but with P regulation (xp-band)
r33 Pc mode

Danfoss AK-PC 530 Specifications

General

Brand	Danfoss
Model	AK-PC 530
Category	Controller
Language	English