Danfoss Controller type AKC 24W for controlling water chillers. Vers. 4.4x. AKM Installation guide
- Type
- Installation guide
RC.1J.P1.02 → RC.1J.P2.02 10-1994
Software version 4.4x
Controller for controlling water chillers
AKC 24W
ADAP-KOOL
®
Menu operation via AKM
2 Menu operation RC.1J.P2.02 © Danfoss 09/95 AKC 24W Version 4.4X
Menu list This menu function can be used together with system software type AKM. The
description is divided up into function groups that can be displayed on the PC screen.
Within each group it is now possible to show the measured values, or settings.
Regarding the use of AKM, reference is made to the AKM Manual.
Validity This menu operation (dated March 1994), applies to controller type AKC 24W,
code number 084B2003 with programme version 4.4x.
The operation is divided up into several
function groups. When a selection has been
made, push “OK”, and you may continue to the
next display. By way of example, “
Injection Ctrl.
A
” has been selected here.
In the measurements section the different
values can be read. The values are constantly
updated.
In the list of settings the set values can be
seen. If a setting has to be changed, select the
parameter and proceed via “OK”.
Function groups
Measurements The various measurements can be read directly. If a graphic display of the
measurements is required, up to eight of them can be shown. Select the required
measurements and push “Trend”.
Settings There are four kinds of settings, ON/OFF settings, settings with a variable value, time
settings and “reset alarms”.
Enter the new value or move the sliding scale up
or down. The new value will apply, when “OK” is
pushed.
Set the required value and
push “OK”
AKC 24W Version 4.4X Menu operation RC.1J.P2.02 © Danfoss 09/95 3
Go through the individual functions one by one and make the required settings. When
settings have been made for one controller, the set values may be used as basis in
the other controllers
of the same type
and
with the same software version
. Copy the
settings by using the copy settings function in the AKM programme, and adjust
subsequently any settings where there are deviations.
NB! If a list is required for noting down the individual settings, a printout can
be made with a function in the AKM programme. Read the next section, “Docu-
mentation”.
Documentation Documentation of the settings of the individual controllers can be made with the print
function in the AKM programme. Select the controller for which documentation of the
settings is required and select the “Print Settings” function (cf. also the AKM Manual).
Functions Shown below are function groups with corresponding measurements and settings. A
printout of the given settings can be made using the AKM function “Print Settings”
(see above).
Alarms
Main Function
Measurements AKC Error When "ON", there is an alarm message. See page 11.
TQ openA % Opening of the TQ valve according to its max. permissible temperature
(Kmax.)
P0/S1 A °C Evaporating temperature converted from pressure
SH A K Superheat of evaporator measured with the sensors P0A/S1 and S2
TQ openB % Opening of the TQ valve according to its max. permissible temperature
(Kmax.)
P0/S1 B °C Evaporating temperature converted from pressure
SH B K Superheat of evaporator measured with the sensors P0B/S1 and S2
Rfg. Type R Reading of set refrigerant type
Settings MainSwitch Function switch: 1: Regulation
0: Controller stopped
-1: Service function
Cool/Heat Selection of regulation: 1: Refrigeration
2: Heat pump
See page 11.
4 Menu operation RC.1J.P2.02 © Danfoss 09/95 AKC 24W Version 4.4X
Rfg. Type Refrigerant selection: 0: No refrigerant selection 12: R142b
1: R12 13: User defined
2: R22 14: R32
3: R134a 15: R227
4: R502 16: R401A
5: R717 (ammonia) 17: AZ50
6: R13 18: R402A
7: R13b1 19: R404A
8: R23 20: KLEA 66
9: R500 21: R407A
10: R503 22: KLEA 61
11: R114
Capacity Ctrl.
Measurements AKC Error When "ON", there is an alarm message. See page 11.
TQ openA % Opening of the TQ valve according to its max. permissible temperature
(Kmax.)
P0/S1 A °C Evaporating temperature converted from pressure
SH A K Superheat of evaporator measured with the sensors P0A/S1 and S2
TQ openB % Opening of the TQ valve according to its max. permissible temperature
(Kmax.)
P0/S1 B °C Evaporating temperature converted from pressure
SH B K Superheat of evaporator measured with the sensors P0B/S1 and S2
Ref. °C Media temperature reference incl. external reference signal
DI 3 Statement of external ON/OFF switch connected to terminal DI 3
Safey A Statement of safety circuit connected to terminals DI 1 (control A)
Safey B Statement of safety circuit connected to terminals DI 2 (control B)
Run TimeA h Operating time for compressor A. Example: If 120 is displayed, the operating time
is 1200 hours
Run TimeB h Operating time for compressor A. Example: If 1200 is displayed, the operating
time is 12000 hours
Media °C Media temperature
Limit °C Temperature measured on sensor definied as “Limit” sensor
Compr.A % Cut-in capacity in %, compressor A
Compr.B % Cut-in capacity in %, compressor B
DO 9 Status of output DO 9 (extra capacity)
Settings MainSwitch Function switch: 1: Regulation
0: Controller stopped
-1: Service function
Cap.Ctrl. Choose capacity control ON/OFF
Media °C Reference value of media temperature
NZ K Neutral zone for media temperature
Limit °C Lowest permissible media temperature (frost-protection)
Media Al°C Upper alarm limit for media temperature. Absolute value.
AKC 24W Version 4.4X Menu operation RC.1J.P2.02 © Danfoss 09/95 5
Injection Ctrl. A
Measurements AKC Error When "ON", there is an alarm message. See page 11.
TQ openA % Opening of the TQ valve according to its max. permissible temperature
(Kmax.)
P0/S1 A °C Evaporating temperature converted from pressure
SH A K Superheat of evaporator measured with the sensors P0A/S1 and S2
TQ openB % Opening of the TQ valve according to its max. permissible temperature
(Kmax.)
P0/S1 B °C Evaporating temperature converted from pressure
SH B K Superheat of evaporator measured with the sensors P0B/S1 and S2
SH Ref.A K Actual superheat reference of the control
SH Mss.A K Registered optimum superheat (only with “Adap mode” in pos. 2)
S2 A °C Refrigerant temperature at evaporator outlet (suction temperature)
Settings MainSwitch Function switch: 1: Regulation
0: Controller stopped
-1: Service function
Inj.Ctrl A Choose expansion valve function ON/OFF
Adap. Mode Selection of type of regulation
1: Regulation based on fixed superheat reference (individually set for each
capacity step)
2: Adaptive regulation following minimum superheat
3: Regulation based on defined SH-curve
Injection only allowed if the respective compressor is running
4: Regulation based on defined SH-curve
Injection allowed if just one of the compressors are running
5: As 4, but the TQ valve kept in stand-by when the regulation is stopped by the
external function switch.
MOP Choose MOP function ON/OFF
MOP °C Value of MOP point
Injection Ctrl. B
Measurements AKC Error When "ON", there is an alarm message. See page 11.
TQ openA % Opening of the TQ valve according to its max. permissible temperature
(Kmax.)
P0/S1 A °C Evaporating temperature converted from pressure
SH A K Superheat of evaporator measured with the sensors P0A/S1 and S2
TQ openB % Opening of the TQ valve according to its max. permissible temperature
(Kmax.)
P0/S1 B °C Evaporating temperature converted from pressure
SH B K Superheat of evaporator measured with the sensors P0B/S1 and S2
SH Ref.B K Actual superheat reference of the control
SH Mss.B K Registered optimum superheat (only with “Adap mode” in pos. 2)
S2 B °C Refrigerant temperature at evaporator outlet (suction temperature)
6 Menu operation RC.1J.P2.02 © Danfoss 09/95 AKC 24W Version 4.4X
Settings MainSwitch Function switch: 1: Regulation
0: Controller stopped
-1: Service function
Inj.Ctrl B Choose expansion valve function ON/OFF
Adap. Mode Selection of type of regulation
1: Regulation based on fixed superheat reference (individually set for each
capacity step)
2: Adaptive regulation following minimum superheat
3: Regulation based on defined SH-curve
Injection only allowed if the respective compressor is running
4: Regulation based on defined SH-curve
Injection allowed if just one of the compressors are running
5: As 4, but the TQ valve kept in stand-by when the regulation is stopped by the
external function switch.
MOP Choose MOP function ON/OFF
MOP °C Value of MOP point
Extended capacity Ctrl.
Measurements AKC Error When "ON", there is an alarm message. See page 11.
TQ openA % Opening of the TQ valve according to its max. permissible temperature
(Kmax.)
P0/S1 A °C Evaporating temperature converted from pressure
SH A K Superheat of evaporator measured with the sensors P0A/S1 and S2
TQ openB % Opening of the TQ valve according to its max. permissible temperature
(Kmax.)
P0/S1 B °C Evaporating temperature converted from pressure
SH B K Superheat of evaporator measured with the sensors P0B/S1 and S2
Settings MainSwitch Function switch: 1: Regulation
0: Controller stopped
-1: Service function
+Zone s Time delay between step cut-ins in the regulating band above the neutral zone.
Set in seconds.
-Zone s Time delay between step cut-outs in the regulating band below the neutral zone.
Set in seconds.
Max step A Definition of compressor A steps
Max step Definition of total number of steps. (sum of steps: compressor A + compressor B)
Ext.Ref. Definition of external reference signal (connect to terminal “REF”)
0: No connection
1: 0 - 10 V signal
2: 2 - 10 V signal
SH Step 1 Superheat reference at initial start or control without adaptive control
(ADAP MODE = 1)
SH Step 2 Superheat reference at initial start or control without adaptive control
(ADAP MODE = 1)
SH Step 3 Superheat reference at initial start or control without adaptive control
(ADAP MODE = 1)
SH Step 4 Superheat reference at initial start or control without adaptive control
(ADAP MODE = 1)
SH Step 5 Superheat reference at initial start or control without adaptive control
(ADAP MODE = 1)
SH Step 6 Superheat reference at initial start or control without adaptive control
(ADAP MODE = 1)
SH Step 7 Superheat reference at initial start or control without adaptive control
(ADAP MODE = 1)
AKC 24W Version 4.4X Menu operation RC.1J.P2.02 © Danfoss 09/95 7
SH Step 8 Superheat reference at initial start or control without adaptive control
(ADAP MODE = 1)
++Zone s Time delay between step cut-ins in the regulating band above the “+zone-band”.
Set in seconds.
+Zone K Regulating band above neutral zone
-Zone K Regulating band below neutral zone
- -Zone s Time delay between step cut-outs in the regulating band below the “-zone-band”.
Set in seconds.
Del A min. Minimum time before compressor A can be restarted. Set in minutes.
Del B min. Minimum time before compressor B can be restarted. Set in minutes.
MaxTimeA h Setting of hour counter for next compressor service to be performed
(compressor A)
MaxTimeB h Setting of hour counter for next compressor service to be performed
(compressor B)
Media Sens Selection of sensor input for measuring media temperature
1: S3
2: S4
3: P0 A
4: P0 B
5: P AUX
Limit Sens Selection of sensor input for limit measurement
0: No sensor
1: S3
2: S4
3: P0 A
4: P0 B
5: P AUX
6: Lowest value of P0 A or P0 B
Time share Priorities for operation of compressors A and B:
1: A starts before B
2: B starts before A
3: Equalisation of operating time
Time diff Max. time difference prior to change-over (at Time Share = “3”)
Me.Al.diff Alarm differential for media temperature
Lim.Dif.K Alarm differential for low media temperature (“Limit” sensor)
Lim.dly s Time delay for “Limit” alarm compressor cutouts
Ext.Max. K Displacement to be produced by max reference signal (10 V)
DO 9 mode Additional capacity required
1: Because all steps are cut-in
2: The media temperature sensor registers a higher value than the one set in the
next menu
DO 9 set °C Temperature value where additional capacity is cut-in
(see previous menu, setting 2)
DO 9 diff K Temperature differential for previous menu
Step mode Step cut-outs with two compressors
1: Last in, first out
2: Change of sequence! (eg. 7-6-4-5-3)
8 Menu operation RC.1J.P2.02 © Danfoss 09/95 AKC 24W Version 4.4X
Extended injection Ctrl. A
Measurements AKC Error When "ON", there is an alarm message. See page 11.
TQ openA % Opening of the TQ valve according to its max. permissible temperature
(Kmax.)
P0/S1 A °C Evaporating temperature converted from pressure
SH A K Superheat of evaporator measured with the sensors P0A/S1 and S2
TQ openB % Opening of the TQ valve according to its max. permissible temperature
(Kmax.)
P0/S1 B °C Evaporating temperature converted from pressure
SH B K Superheat of evaporator measured with the sensors P0B/S1 and S2
Settings MainSwitch Function switch: 1: Regulation
0: Controller stopped
-1: Service function
SH Min K Min. value of superheat reference
SH Max K Max.value of superheat reference
Use AKS 32 ON for use of pressure transmitter for registration of P0A
OFF for use of Pt 1000 ohm sensor as S1A sensor
Kp Amplification factor
Tper. sec. Period time. (Minimum time between two automatic reductions of the superheat
reference = 1.5 x Tper. Integration time = 0.8 x Tper)
Kmax. Curve Change of TQ valve K max. curve
Standby K Displacement of TQ valve’s standby temperature: relation to the TQ valve’s
opening temperature (K curve) (negative values only)
SH Close K Min. value of superheat reference at loads below 10%
(The value must be lower than SH min.)
Extended injection Ctrl. B
Measurements AKC Error When "ON", there is an alarm message. See page 11.
TQ openA % Opening of the TQ valve according to its max. permissible temperature
(Kmax.)
P0/S1 A °C Evaporating temperature converted from pressure
SH A K Superheat of evaporator measured with the sensors P0A/S1 and S2
TQ openB % Opening of the TQ valve according to its max. permissible temperature
(Kmax.)
P0/S1 B °C Evaporating temperature converted from pressure
SH B K Superheat of evaporator measured with the sensors P0B/S1 and S2
Settings MainSwitch Function switch: 1: Regulation
0: Controller stopped
-1: Service function
SH Min K Min. value of superheat reference
SH Max K Max.value of superheat reference
Use AKS 32 ON for use of pressure transmitter for registration of P0B
OFF for use of Pt 1000 ohm sensor as S1B sensor
Kp Amplification factor
Tper. sec. Period time. (Minimum time between two automatic reductions of the superheat
reference = 1.5 x Tper. Integration time = 0.8 x Tper)
Kmax. Curve Change of TQ valve K max. curve
Standby K Displacement of TQ valve’s standby temperature: relation to the TQ valve’s
opening temperature (K curve) (negative values only)
SH Close K Min. value of superheat reference at loads below 10%
(The value must be lower than SH min.)
AKC 24W Version 4.4X Menu operation RC.1J.P2.02 © Danfoss 09/95 9
Service Mode
Measurements AKC Error When "ON", there is an alarm message. See page 11.
AKC Error When "ON", there is an alarm message. See page 11.
TQ openA % Opening of the TQ valve according to its max. permissible temperature
(Kmax.)
P0/S1 A °C Evaporating temperature converted from pressure
SH A K Superheat of evaporator measured with the sensors P0A/S1 and S2
TQ openB % Opening of the TQ valve according to its max. permissible temperature
(Kmax.)
P0/S1 B °C Evaporating temperature converted from pressure
SH B K Superheat of evaporator measured with the sensors P0B/S1 and S2
P0 A bar Pressure measured with pressure transmitter connected to P0A inlet
P0 B bar Pressure measured with pressure transmitter connected to P0B inlet
Paux bar Pressure measured with pressure transmitter connected to Paux inlet
S1 A °C Refrigerant temperature at evaporator inlet control A
S2 A °C Refrigerant temperature at evaporator outlet control A
S1 B °C Refrigerant temperature at evaporator inlet control B
S2 B °C Refrigerant temperature at evaporator outlet control B
S3 °C Media temperature measured with S3 sensor
S4 °C Temperature measured with S4 sensor
Ext.ref. V Registered value of external reference connected to terminal “REF”
DI 3 Statement of cut-off function connected to terminal “DI 3”
TQ A °C TQ-temperature, control A (NTC)
TQ B °C TQ-temperature, control B (NTC)
Safety A Statement of safety circuit at terminal DI 1 (control A)
Safety B Statement of safety circuit at terminal DI 2 (control B)
Settings MainSwitch Function switch: 1: Regulation
0: Controller stopped
-1: Service function
Man. Ctrl. ON: Manual setting allowed.
PLEASE NOTE: No monitoring
When manual setting has been completed, setting must be changed to OFF
TQ A % Forced servo operation of power supply to expansion valve control A.
TQ B % Forced servo operation of power supply to expansion valve control B.
Step 8 Forced servo operation of outlet DO8. ON => 24 V a.c. on C3/C4
More Cap. Forced servo operation of outlet DO9. ON => 24 V a.c. on D3/D4
Step 1 Forced servo operation of outlet DO1. ON => 24 V a.c. on X1/X2
Step 2 Forced servo operation of outlet DO2. ON => 24 V a.c. on X3/X4
Step 3 Forced servo operation of outlet DO3. ON => 24 V a.c. on X5/X6
Step 4 Forced servo operation of outlet DO4. ON => 24 V a.c. on X7/X8
Step 5 Forced servo operation of outlet DO5. ON => 24 V a.c. on Y1/Y2
Step 6 Forced servo operation of outlet DO6. ON => 24 V a.c. on Y3/Y4
Step 7 Forced servo operation of outlet DO7. ON => 24 V a.c. on Y5/Y6
Alarm out Forced servo operation of alarm outlet.
ON => Relay switch closed = no alarm (0 V on Y7/Y8)
10 Menu operation RC.1J.P2.02 © Danfoss 09/95 AKC 24W Version 4.4X
Alarm destinations
Measurements AKC Error When "ON", there is an alarm message. See page 11.
TQ openA % Opening of the TQ valve according to its max. permissible temperature
(Kmax.)
P0/S1 A °C Evaporating temperature converted from pressure
SH A K Superheat of evaporator measured with the sensors P0A/S1 and S2
TQ openB % Opening of the TQ valve according to its max. permissible temperature
(Kmax.)
P0/S1 B °C Evaporating temperature converted from pressure
SH B K Superheat of evaporator measured with the sensors P0B/S1 and S2
Settings MainSwitch Function switch: 1: Regulation
0: Controller stopped
-1: Service function
Network ON: When alarms are registrated via PC or Gateway printer
OFF: When alarm are registrated via AKA 21, only
Set the priority for the following alarm texts (choose between 1, 2 or 0. They have the following
meaning:)
1: Alarm at relay output + DANBUSS
®
message
2: DANBUSS
®
message only
0: No alarm and no DANBUSS
®
message
The individual alarms are explained in more detail on page 11
Stdby dest (Regulation has stopped)
Rfg change (Changed refrigerant)
S3max.dest (Too high media temperature)
S4cut dest (Low temperature. Risk of frost)
Safety (Cut-out in safety circuit)
Max.step A (Programming error)
Serv. dest (Service information)
TQ adj. (Setting error)
AKM menu "For DANFOSS only"
This menu contains data and setting values for special internal controller functions.
Do not chage the stated values.
AKC 24W Version 4.4X Menu operation RC.1J.P2.02 © Danfoss 09/95 11
Alarms
Alarms may be acknowledged one by one by
selecting one, and then pushing "OK". An Alarm
message will now appear, e.g.:
Push "OK" to acknowledge.
The following alarm messages may occur:
Alarm message Meaning Action/cause
Sx error ( ) Sx sensor error Check sensor connection / sensor resistance
P0 Error ( ) Pressure transmitter error Check connections
Paux Error Pressure transmitter error Check connections
NTC Error TQ ( ) NTC sensor error in TQ actuator Check sensor connection/sensor resistance.
Standby Mode Regulation has stopped Function switch (Main Switch) is either in
pos.”Controller stopped” or “Service mode”
Time for Compr. ( ) Service information The operating time set for the compressor has
inspection been reached. Plan service.
Rfg.Type changed after Changed refrigerant Check chosen refrigerant. Regulation with
pow_up changed refrigerant not possible before the
controller has been de-energized.
Rfg. Type No selection of refrigerant Select refrigerant
Not selected
Too high Media temperature Too high media temperature
Cut off below Limit temp. Low temperature. Wait for temperature rise
Risk of frost.
Safety ( ) Cutout Cut-out in safety circuit Check safety automatic
Max step A >Max step Programming error Correction of data
Adj. Error TQ ( ) Setting error Check if P0 is measured by AKS 32
AKS 32 not ON
The menu display for alarms shows the active alarms. Dots will appear at the top of the menu
while data is being obtained.
12 Menu operation RC.1J.P2.02 © Danfoss 09/95 AKC 24W Version 4.4X
Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products
already on order provided that such alternations can be made without subsequential changes being necessary in specifications already agreed.
All trademarks in this material are property of the respecitve companies. Danfoss and Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.
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Danfoss Controller type AKC 24W for controlling water chillers. Vers. 4.4x. AKM Installation guide
- Type
- Installation guide
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