Menu List, Validity, and Function Groups
This menu function is used with system software type AKM. It is divided into function groups displayed on the PC screen, allowing users to view measured values or settings. Reference is made to the AKM Manual for AKM usage.
This menu operation (from January 2016) applies to controller type AK-CH 650, code number/080Z0132 with program version 2.0x.
The operation is divided into several function groups. Selecting a group and pressing "[OK]" allows navigation to the next display. For example, "Suction capacity control" can be selected.
Measured values are displayed on the "measure" line and are constantly updated. In the "settings" list, set values are visible. To change a setting, select the parameter and press "[OK]".
Measurements
Measurements can be read directly. A graphic display of up to eight measurements can be shown by selecting them and pressing "[Trend]".
Settings
Settings can only be made for daily operation. Configuration settings are not visible, changeable, or writable via this interface; they require the Service Tool program.
There are four types of settings: ON/OFF settings, variable value settings, time settings, and "reset alarms".
To set a required value, press "[OK]". To enter a new value or adjust a sliding scale, use the controls. The new value applies when "[OK]" is pressed.
Documentation
Go through individual functions to make required settings. Once settings are made for one controller, they can be copied to other controllers of the same type and software version using the AKM program's "copy settings" function, with subsequent adjustments for deviations.
A printout of individual settings can be made using a function within the AKM program. Refer to the "Documentation" section for more details.
Documentation of individual controller settings can be generated via the AKM program's print function. Select the controller and then the "Print Settings" function (refer to the AKM Manual).
AKM Menu Example:
The AKM menu includes options such as Plant overview, History, Configuration, AKC, AKA, AKSC, Access, and Help. Sub-menu items include Controllers, Copy Settings, Print Settings, Programming, and Reset Alarms.
Functions
Function groups with corresponding measurements and settings are shown. A printout of the given settings can be made using the AKM function "Print Settings".
Note: Selections are made among many measurements and settings from the controller. The AKM program operation cannot display all of them. For access to all measurements and settings, use Service Tool type AK-ST 500.
Main Settings
Measurements
| Parameter | Description |
|---|---|
| AK error | When "ON", the controller is in alarm condition. |
| Comp. Ctrl. temp. | Actual temperature for compressor control. |
| S4 Cold brine supply | Actual cold brine supply temperature measured with S4 temp. sensor. |
| S3 Cold brine return | Actual cold brine return temperature measured with S3 temp. sensor. |
| P0 °C | Suction pressure in °C. (Measured with the pressure transmitter). |
| Comp. ctrl. Ref. °C | Actual reference temperature for compressor control. |
| Compressor cap. % | Cut-in compressor capacity in % (of total capacity). |
| Request Comp. Cap % | Reference for compressor capacity (deviations may be due to time delays). |
| Cond. ctrl. temp °C | Actual temperature for control sensor (Pc or S7). |
| S7 warm brine °C | Actual warm brine temperature for S7 media sensor (Only used if S7 sensor is selected as regulation sensor). |
| Pc °C | Condensing pressure in °C. (measured with the pressure transmitter). |
| Cond. ctrl. ref. °C | Actual reference temp. for condenser capacity (incl. external reference signal, if any). |
| Cond. cap. % | Cut-in condenser capacity in % (of total capacity). |
| Request Cond. cap % | Reference for condenser capacity. |
| External Main Switch | Status of input "Extern Main Switch". In pos. "OFF" the regulation is stopped by force. |
Settings
| Parameter | Description |
|---|---|
| Main switch | ON: Regulation OFF: Controller stopped |
| Configuration lock | Lock of configuration. To select quick setup or refrigerant type, the configuration lock must be "open". Note: "Main switch" must be OFF to set configuration lock to "open". |
| Select quick setup | Select a pre-defined application. All I/Os and setpoints are pre-defined and adapted to the selected application. The controller will restart upon selection. See AK-PC 840 manual for details. |
| Refrigerant type Po | Select refrigerant type. Options include R12, R22, R134a, R502, R717, R13, R13b1, R23, R500, R503, R114, R142b, User defined, R32, R227, R401A, R507, R402A, R404A, R407C, R407A, R407B, R410A, R170, R290, R600, R600a, R744, R1270, R417A. |
Suction capacity control
Measurements
| Parameter | Description |
|---|---|
| AK error | When "ON", the controller is in alarm condition. |
| Comp. Ctrl. temp. | Actual temperature for compressor control. |
| S4 Cold brine supply | Actual cold brine supply temperature measured with S4 temp. sensor. |
| S3 Cold brine return | Actual cold brine return temperature measured with S3 temp. sensor. |
| P0 °C | Suction pressure in °C. (Measured with the pressure transmitter). |
| Comp. ctrl. Ref. °C | Actual reference temperature for compressor control. |
| Compressor cap. % | Cut-in compressor capacity in % (of total capacity). |
| Request Comp. Cap % | Reference for compressor capacity (deviations may be due to time delays). |
| Cond. ctrl. temp °C | Actual temperature for control sensor (Pc or S7). |
| S7 warm brine °C | Actual warm brine temperature for S7 media sensor (Only used if S7 sensor is selected as regulation sensor). |
| Pc °C | Condensing pressure in °C. (measured with the pressure transmitter). |
| Cond. ctrl. ref. °C | Actual reference temp. for condenser capacity (incl. external reference signal, if any). |
| Cond. cap. % | Cut-in condenser capacity in % (of total capacity). |
| Request Cond. cap % | Reference for condenser capacity. |
| MC dP0 offset K | Actual displacement value for suction pressure in connection with "P0 Optimiser" function (Master control function in AKA gateway). |
| S3 offset | Contribution from reference displacement via S3 sensor. |
| Ext. Ref. Offset °C | Contribution from external reference displacement. |
| Night setback | Status of night setback function: ON: Night (increase of evaporating pressure permitted), OFF: Normal situation. |
| Suction status | 0: Power up (Controller powered up), 1: Stopped (Capacity control stopped), 2: Manual (Capacity controlled manually), 3: Alarm (Alarm condition), 4: Restart (Waiting for restart time), 5: Standby (Ready to start), 10: Full loaded (All capacity cutin), 11: Running (Capacity control running). |
Settings
| Parameter | Description |
|---|---|
| Actual Zone | Actual zone for capacity regulation: 0: P0-error, 1: -- Zone, 2: - Zone, 3: NZ, 4: + Zone, 5: ++ Zone. |
| Load shed input 1 | Actual status on Load shed input 1. |
| Load shed input 2 | Actual status on Load shed input 2. |
| Liq. Inj. heat exch | Liquid injection can be coordinated with compressor operation: 0: no coordination, 1: Synchronization with compressor operation, 2: Last compressor stopped after pump down. |
| No. of compressors | Defined number of compressors. |
| Comp. application | Select compressor application (see AK-CH 650 manual). Options: 0: Single step only, 1: 1xComp. w. unloaders + Single step, 2: 2xComp. w. unloaders + Single step, 3: Comp. w. unloaders only, 4: 1xVariable speed + Single step, 5: 1xVariable speed + Comp. w. unloaders, 6: 2xVariable speed + Single step. |
| Step control mode | Selected coupling pattern for compressors: Sequential (cut in/out by number), Cyclic (runtime equalization), Best fit (best fit to actual load). Options: 0: Sequential, 2: Cyclic, 3: Best fit. |
| S4 Min 24h | Minimum value for S4 temp. for the last 24 hours. |
| S4 Max 24h | Maximum value for S4 temp. for the last 24 hours. |
| S4 Average 24h | Average value for S4 temp. for the last 24 hours. |
| Extra cooling req. | Brine temperature is higher than desired, and the relay "extra cooling" is active. |
| Main switch | ON: Regulation OFF: Controller stopped |
| Cap. control mode | 0: MAN (Manual control), 1: OFF (Control stopped), 2: AUTO (PI controller). |
| Manual capacity % | Manual setting of compressor capacity (in % of total capacity). |
| Control sensor | Choice of regulation sensor: 0: P0, 3: S4. |
| Reference mode | Choice of suction pressure reference: 0: SP + Ext. Ref + Night + S3 offset, 1: SP + Po optimization. |
| Setpoint °C | Setting of required suction pressure in °C. |
| ++Zone delay s | Time delay between step cut-ins in the regulation band over the "+Zone band" (seconds). |
| +Zone delay s | Time delay between step cut-ins in the regulation band over the neutral zone (seconds). |
| +Zone band K | Regulation band over the neutral zone. |
| Neutral zone K | Neutral zone for suction pressure. |
| -Zone band K | Regulation band under the neutral zone. |
| -Zone delay s | Time delay between step cut-outs in the regulation band under the neutral zone (seconds). |
Suction compressor status
Measurements
| Parameter | Description |
|---|---|
| AK error | When "ON", the controller is in alarm condition. |
| Comp. Ctrl. temp. | Actual temperature for compressor control. |
| S4 Cold brine supply | Actual cold brine supply temperature measured with S4 temp. sensor. |
| S3 Cold brine return | Actual cold brine return temperature measured with S3 temp. sensor. |
| P0 °C | Suction pressure in °C. (Measured with the pressure transmitter). |
| Comp. ctrl. Ref. °C | Actual reference temperature for compressor control. |
| Compressor cap. % | Cut-in compressor capacity in % (of total capacity). |
| Request Comp. Cap % | Reference for compressor capacity (deviations may be due to time delays). |
| Cond. ctrl. temp °C | Actual temperature for control sensor (Pc or S7). |
| S7 warm brine °C | Actual warm brine temperature for S7 media sensor (Only used if S7 sensor is selected as regulation sensor). |
| Pc °C | Condensing pressure in °C. (measured with the pressure transmitter). |
| Cond. ctrl. ref. °C | Actual reference temp. for condenser capacity (incl. external reference signal, if any). |
| Cond. cap. % | Cut-in condenser capacity in % (of total capacity). |
| Request Cond. cap % | Reference for condenser capacity. |
| --Zone delay s | Time delay between step cut-outs in the regulation band under the "-Zone band" (seconds). |
| Kp S4 | Amplification factor for P0 regulation. |
| Night offset K | Displacement value for suction pressure with active night setback signal (Kelvin). |
| Tref S3 offset | Reference temperature for S3 signal; if = Tref, no displacement. |
| K1 S3 offset | Displacement of S4 reference based on S3 temperature increase relative to "Tref S3 offset" (1°C). (K1=0 means no displacement). |
| Max.Reference °C | Max. permissible suction pressure reference. |
| Min.Reference °C | Min. permissible suction pressure reference. |
| VSD Min. speed Hz | Minimum allowed speed before stop of Variable Speed drive (Low load). |
| VSD Start speed Hz | Minimum speed for start of Variable speed drive (Must be higher than "VSD Min. Speed Hz"). |
| VSD Max. speed Hz | Highest permissible speed for the compressor motor. |
| Load shed limit 1 | Set max capacity limit for load shed input 1. |
| Load shed limit 2 | Set max capacity limit for load shed input 2. |
| Override limit Po | Set max load shedding override limit for suction pressure Po. |
| Override delay 1 min | Delay for load shed limit 1. If suction pressure exceeds "Override limit Po" and delay expires, limit 1 is cancelled. |
| Override delay 2 min | Delay for load shed limit 2. If suction pressure exceeds "Override limit Po" and delay expires, limit 2 is cancelled. |
| Po pump down limit °C | Set the actual pump down limit for the last compressor. |
| Initial start time | Time after start-up where cut-in capacity is limited to the first compressor step. |
| 1 comp. start delay | On new start, delay of first compressor start to allow brine pumps to reach speed. |
| Extra cooling mode | A relay is activated if brine temperature is higher than desired. |
| Extra cooling offset | Set value (K above reference) for relay activation. |
| Extra cooling delay | Delay before relay activation (applies during normal regulation). |
| Extra cooling init d. | Delay before relay activation (applies during cooling after start-up and defrost). |
Settings
| Parameter | Description |
|---|---|
| Comp 1 Status | 0: Power up, 1: Stopped, 2: Manual, 3: Alarm, 4: Restart, 5: Standby, 10: Full loaded, 11: Running. |
| VSD Speed % | Present speed of the compressor motor (frequency converter). |
| Comp 1 capacity % | Actual cut-in capacity for this compressor. |
| Comp 2 ...capacity % | As above for compressor no. 2 to 6. |
| Comp 1 Runtime % 24 | Running time for compressor 1 in percent within the past 24 hours. |
| Comp 2 ...Runtime % 24 | As above for compressor no. 2 to 6. |
| Comp 1 Cycles / 24 h | Number of compressor starts during the past 24 hours. |
| Comp 2 ...Cycles / 24 h | As above for compressor no. 2 to 6. |
| Main switch | ON: Regulation OFF: Controller stopped |
| 1 Min. ON-time m | Minimum duration of ON period. |
| 2...Min. ON-time m | As above for compressor no. 2 to 6. |
| 1 Min. OFF-time m | Minimum duration of OFF period. |
| 2... Min. OFF-time m | As above for compressor no. 2 to 6. |
| 1 recycle time m | Minimum period between two successive starts. |
| 2...recycle time m | As above for compressor no. 2 to 6. |
| 1 runtime h | Compressor's total run time in hours. |
| 2...runtime h | As above for compressor no. 2 to 6. |
Pump control
Measurements
| Parameter | Description |
|---|---|
| AK error | When "ON", the controller is in alarm condition. |
| Comp. Ctrl. temp. | Actual temperature for compressor control. |
| S4 Cold brine supply | Actual cold brine supply temperature measured with S4 temp. sensor. |
| S3 Cold brine return | Actual cold brine return temperature measured with S3 temp. sensor. |
| P0 °C | Suction pressure in °C. (Measured with the pressure transmitter). |
| Comp. ctrl. Ref. °C | Actual reference temperature for compressor control. |
| Compressor cap. % | Cut-in compressor capacity in % (of total capacity). |
| Request Comp. Cap % | Reference for compressor capacity (deviations may be due to time delays). |
| Cond. ctrl. temp °C | Actual temperature for control sensor (Pc or S7). |
| S7 warm brine °C | Actual warm brine temperature for S7 media sensor (Only used if S7 sensor is selected as regulation sensor). |
| Pc °C | Condensing pressure in °C. (measured with the pressure transmitter). |
| Cond. ctrl. ref. °C | Actual reference temp. for condenser capacity (incl. external reference signal, if any). |
| Cond. cap. % | Cut-in condenser capacity in % (of total capacity). |
| Request Cond. cap % | Reference for condenser capacity. |
| Cold pump running | Reading of pump status: 0: Pumps stopped, 1: Cold pump 1 in use, 2: Cold pump 2 in use, 3: Both pumps in use. |
| Flow switch status | Current status for flow switch input. |
| Pump 1 safety | Actual status for input "Pump 1". |
| Pump 2 safety | Actual status for input "Pump 2". |
Settings
| Parameter | Description |
|---|---|
| Main switch | ON: Regulation OFF: Controller stopped |
| Cold Pump ctrl. | Choice of pump operation: 0: Both pumps stopped, 1: Cold pump 1 constant use, 2: Cold pump 2 constant use, 3: Both pumps constant use, 4: Offset operational time (start before stop), 5: Offset operational time (stop before start). |
| Pump cycle time | Operational times of pumps before switchover. |
| Pump switch time | Overlap time (both pumps in use) or break time (switching between pumps) if "Cold Pump ctrl" is 4 or 5. |
| Pump alarm delay | Delay on pump alarm before activation and automatic changeover (if "Cold Pump ctrl" is 4 or 5). |
Defrost control
Measurements
| Parameter | Description |
|---|---|
| AK error | When "ON", the controller is in alarm condition. |
| Comp. Ctrl. temp. | Actual temperature for compressor control. |
| S4 Cold brine supply | Actual cold brine supply temperature measured with S4 temp. sensor. |
| S3 Cold brine return | Actual cold brine return temperature measured with S3 temp. sensor. |
| P0 °C | Suction pressure in °C. (Measured with the pressure transmitter). |
| Comp. ctrl. Ref. °C | Actual reference temperature for compressor control. |
| Compressor cap. % | Cut-in compressor capacity in % (of total capacity). |
| Request Comp. Cap % | Reference for compressor capacity (deviations may be due to time delays). |
| Cond. ctrl. temp °C | Actual temperature for control sensor (Pc or S7). |
| S7 warm brine °C | Actual warm brine temperature for S7 media sensor (Only used if S7 sensor is selected as regulation sensor). |
| Pc °C | Condensing pressure in °C. (measured with the pressure transmitter). |
| Cond. ctrl. ref. °C | Actual reference temp. for condenser capacity (incl. external reference signal, if any). |
| Cond. cap. % | Cut-in condenser capacity in % (of total capacity). |
| Request Cond. cap % | Reference for condenser capacity. |
| Defrost status | Current status for defrost function. |
| Defrost temp. | Current temperature of chosen defrost stop sensor. |
| Defrost time | Defrosting time for current or most recently completed defrost. |
| Average defrost time | Average defrosting time for the 10 most recent defrosts. |
Settings
| Parameter | Description |
|---|---|
| Main switch | ON: Regulation OFF: Controller stopped |
| Start defrost | Manual start of defrost. |
| Stop defrost | Manual stop of defrost. |
| Defrost control | Select if defrost function is required. |
| Defrost stop sensor | Select defrost stop method: 0: Stop exclusively on time, 1: Stop at S3 temp. (with time backup), 2: Stop at S4 temp. (with time backup). |
| Defrost stop temp. | Temperature value for defrost stop (when selected sensor reaches set value). |
| Max. defrost time | Maximum permitted defrosting time in minutes (security time for stop using temperature). |
| Drip delay | Delay after defrost before compressors start, allowing water to run off surfaces. |
| Comp. run at def. | Select if compressors are permitted to run during defrost. |
Condenser capacity control
Measurements
| Parameter | Description |
|---|---|
| AK error | When "ON", the controller is in alarm condition. |
| Comp. Ctrl. temp. | Actual temperature for compressor control. |
| S4 Cold brine supply | Actual cold brine supply temperature measured with S4 temp. sensor. |
| S3 Cold brine return | Actual cold brine return temperature measured with S3 temp. sensor. |
| P0 °C | Suction pressure in °C. (Measured with the pressure transmitter). |
| Comp. ctrl. Ref. °C | Actual reference temperature for compressor control. |
| Compressor cap. % | Cut-in compressor capacity in % (of total capacity). |
| Request Comp. Cap % | Reference for compressor capacity (deviations may be due to time delays). |
| Cond. ctrl. temp °C | Actual temperature for control sensor (Pc or S7). |
| S7 warm brine °C | Actual warm brine temperature for S7 media sensor (Only used if S7 sensor is selected as regulation sensor). |
| Pc °C | Condensing pressure in °C. (measured with the pressure transmitter). |
| Cond. ctrl. ref. °C | Actual reference temp. for condenser capacity (incl. external reference signal, if any). |
| Cond. cap. % | Cut-in condenser capacity in % (of total capacity). |
| Request Cond. cap % | Reference for condenser capacity. |
| Condenser status | 0: Power up, 1: Stopped, 2: Manual, 3: Alarm, 4: Restart, 5: Standby, 10: Full loaded, 11: Running. |
Condenser fan status
Measurements
| Parameter | Description |
|---|---|
| AK error | When "ON", the controller is in alarm condition. |
| Comp. Ctrl. temp. | Actual temperature for compressor control. |
| S4 Cold brine supply | Actual cold brine supply temperature measured with S4 temp. sensor. |
| S3 Cold brine return | Actual cold brine return temperature measured with S3 temp. sensor. |
| P0 °C | Suction pressure in °C. (Measured with the pressure transmitter). |
| Comp. ctrl. Ref. °C | Actual reference temperature for compressor control. |
| Compressor cap. % | Cut-in compressor capacity in % (of total capacity). |
| Request Comp. Cap % | Reference for compressor capacity (deviations may be due to time delays). |
| Cond. ctrl. temp °C | Actual temperature for control sensor (Pc or S7). |
| S7 warm brine °C | Actual warm brine temperature for S7 media sensor (Only used if S7 sensor is selected as regulation sensor). |
| Pc °C | Condensing pressure in °C. (measured with the pressure transmitter). |
| Cond. ctrl. ref. °C | Actual reference temp. for condenser capacity (incl. external reference signal, if any). |
| Cond. cap. % | Cut-in condenser capacity in % (of total capacity). |
| Request Cond. cap % | Reference for condenser capacity. |
| Fan1/VSD status | Status of Fan 1: ON: Fan is running, OFF: Fan is not running. |
| Fan2.... status | As above for fan 2 to 8. |
Settings
| Parameter | Description |
|---|---|
| Main switch | ON: Regulation OFF: Controller stopped |
| Fan 1 runtime | Total on time for fan 1. |
| Fan 2.... runtime | Total on time for fan 2 to 8. |
Safety Functions
Measurements
| Parameter | Description |
|---|---|
| AK error | When "ON", the controller is in alarm condition. |
| Comp. Ctrl. temp. | Actual temperature for compressor control. |
| S4 Cold brine supply | Actual cold brine supply temperature measured with S4 temp. sensor. |
| S3 Cold brine return | Actual cold brine return temperature measured with S3 temp. sensor. |
| P0 °C | Suction pressure in °C. (Measured with the pressure transmitter). |
| Comp. ctrl. Ref. °C | Actual reference temperature for compressor control. |
| Compressor cap. % | Cut-in compressor capacity in % (of total capacity). |
| Request Comp. Cap % | Reference for compressor capacity (deviations may be due to time delays). |
| Cond. ctrl. temp °C | Actual temperature for control sensor (Pc or S7). |
| S7 warm brine °C | Actual warm brine temperature for S7 media sensor (Only used if S7 sensor is selected as regulation sensor). |
| Pc °C | Condensing pressure in °C. (measured with the pressure transmitter). |
| Cond. ctrl. ref. °C | Actual reference temp. for condenser capacity (incl. external reference signal, if any). |
| Cond. cap. % | Cut-in condenser capacity in % (of total capacity). |
| Request Cond. cap % | Reference for condenser capacity. |
| Ss suction gas °C | Suction gas temperature in °C. |
| Suction superheat K | Superheat in suction line. |
| Sd discharge gas °C | Discharge gas temperature in °C. |
| Anti freeze safety | Actual status of general shared frost protection input for all compressors. |
Settings
| Parameter | Description |
|---|---|
| Main switch | ON: Regulation OFF: Controller stopped |
| Pc max. limit °C | Max. value of discharge pressure in °C. (If exceeded, entire compressor capacity cut out). (At 3 K under PcA max., condenser capacity cut in, compressor capacity reduced). |
| Sd max. limit °C | Max. value of discharge pressure in °C. (If exceeded, entire compressor capacity cut out and entire condenser capacity cut in). |
| P0 min. limit °C | Min. value of suction pressure in °C. (If less, entire compressor capacity cut out). |
| P0 min del at start | On start of first compressor, low-pressure security function "Po My limit" is delayed to prevent low-pressure dropout at start. |
General alarm inputs
Measurements
| Parameter | Description |
|---|---|
| AK error | When "ON", the controller is in alarm condition. |
| Comp. Ctrl. temp. | Actual temperature for compressor control. |
| S4 Cold brine supply | Actual cold brine supply temperature measured with S4 temp. sensor. |
| S3 Cold brine return | Actual cold brine return temperature measured with S3 temp. sensor. |
| P0 °C | Suction pressure in °C. (Measured with the pressure transmitter). |
| Comp. ctrl. Ref. °C | Actual reference temperature for compressor control. |
| Compressor cap. % | Cut-in compressor capacity in % (of total capacity). |
| Request Comp. Cap % | Reference for compressor capacity (deviations may be due to time delays). |
| Cond. ctrl. temp °C | Actual temperature for control sensor (Pc or S7). |
| S7 warm brine °C | Actual warm brine temperature for S7 media sensor (Only used if S7 sensor is selected as regulation sensor). |
| Pc °C | Condensing pressure in °C. (measured with the pressure transmitter). |
| Cond. ctrl. ref. °C | Actual reference temp. for condenser capacity (incl. external reference signal, if any). |
| Cond. cap. % | Cut-in condenser capacity in % (of total capacity). |
| Request Cond. cap % | Reference for condenser capacity. |
| DI 1 Alarm | Alarm status on function defined as DI1 alarm: ON: Alarm active, OFF: No alarm, normal situation. |
| DI 2.... Alarm | As above, but for alarm functions 2 to 8. |
Settings
| Parameter | Description |
|---|---|
| Main switch | ON: Regulation OFF: Controller stopped |
| DI 1 Alarm delay m | Time delay for the alarm "DI 1 Alarm". |
| DI 2.... Alarm delay m | As above, but for alarm functions 2 to 8. |
Thermostat/pressostats
Measurements
| Parameter | Description |
|---|---|
| AK error | When "ON", the controller is in alarm condition. |
| Comp. Ctrl. temp. | Actual temperature for compressor control. |
| S4 Cold brine supply | Actual cold brine supply temperature measured with S4 temp. sensor. |
| S3 Cold brine return | Actual cold brine return temperature measured with S3 temp. sensor. |
| P0 °C | Suction pressure in °C. (Measured with the pressure transmitter). |
| Comp. ctrl. Ref. °C | Actual reference temperature for compressor control. |
| Compressor cap. % | Cut-in compressor capacity in % (of total capacity). |
| Request Comp. Cap % | Reference for compressor capacity (deviations may be due to time delays). |
| Cond. ctrl. temp °C | Actual temperature for control sensor (Pc or S7). |
| S7 warm brine °C | Actual warm brine temperature for S7 media sensor (Only used if S7 sensor is selected as regulation sensor). |
| Pc °C | Condensing pressure in °C. (measured with the pressure transmitter). |
| Cond. ctrl. ref. °C | Actual reference temp. for condenser capacity (incl. external reference signal, if any). |
| Cond. cap. % | Cut-in condenser capacity in % (of total capacity). |
| Request Cond. cap % | Reference for condenser capacity. |
| Thermostat 1 °C | Temperature measurement of function defined in Thermostat 1. |
| Thermostat 2 °C | Temperature measurement of function defined in Thermostat 2. |
| Thermostat 3 °C | Temperature measurement of function defined in Thermostat 3. |
| Pressostat 1 Bar | Pressure measurement of function defined in Pressure Control 1. |
| Pressostat 2 Bar | As above, but for pressostat 2. |
Settings
| Parameter | Description |
|---|---|
| Main switch | ON: Regulation OFF: Controller stopped |
| Ther. 1 Cutin °C | Cutin value for function defined in "Thermostat 1". |
| Ther. 1 Cutout °C | Cutout value for function defined in "Thermostat 1". |
| Ther. 1 High Alarm °C | High alarm limit "Thermostat 1". |
| Ther. 1 Low Alarm °C | Low alarm limit "Thermostat 1". |
| Ther. 1 High ALDly m | Time delay for high alarm "Thermostat 1". |
| Ther. 1 Low ALDly m | Time delay for low alarm "Thermostat 1". |
| Ther. 2............ | As above, but for thermostat 2. |
| Ther. 3............ | As above, but for thermostat 3. |
| Pres. 1 Cutin bar | Cutin value for function defined in "Pressure Control 1". |
| Pres. 1 Cutout bar | Cutout value for function defined in "Pressure Control 1". |
| Pres. 1 High alarm bar | High alarm limit "Pressostat 1". |
| Pres. 1 Low alarm bar | Low alarm limit "Pressostat 1". |
| Pres. 1 High ALDly m | Time delay for high alarm "Pressostat 1". |
| Pres. 1 Low ALDly m | Time delay for low alarm "Pressostat 1". |
| Pres. 2............ | As above, but for pressostat 2. |
(Use Service Tool if data concerning thermostats 4 and 5 or from pressure controls 3, 4 and 5 have to be downloaded).
Voltage inputs
Measurements
| Parameter | Description |
|---|---|
| AK error | When "ON", the controller is in alarm condition. |
| Comp. Ctrl. temp. | Actual temperature for compressor control. |
| S4 Cold brine supply | Actual cold brine supply temperature measured with S4 temp. sensor. |
| S3 Cold brine return | Actual cold brine return temperature measured with S3 temp. sensor. |
| P0 °C | Suction pressure in °C. (Measured with the pressure transmitter). |
| Comp. ctrl. Ref. °C | Actual reference temperature for compressor control. |
| Compressor cap. % | Cut-in compressor capacity in % (of total capacity). |
| Request Comp. Cap % | Reference for compressor capacity (deviations may be due to time delays). |
| Cond. ctrl. temp °C | Actual temperature for control sensor (Pc or S7). |
| S7 warm brine °C | Actual warm brine temperature for S7 media sensor (Only used if S7 sensor is selected as regulation sensor). |
| Pc °C | Condensing pressure in °C. (measured with the pressure transmitter). |
| Cond. ctrl. ref. °C | Actual reference temp. for condenser capacity (incl. external reference signal, if any). |
| Cond. cap. % | Cut-in condenser capacity in % (of total capacity). |
| Request Cond. cap % | Reference for condenser capacity. |
| Volt 1 readout | Voltage measurement on the function defined in Volt 1. |
Settings
| Parameter | Description |
|---|---|
| Main switch | ON: Regulation OFF: Controller stopped |
| Volt 1 Cutin | The value where the relay is to cut in. |
| Volt 1 Cutout | The value where the relay is to cut out. |
| Volt 1 Cutin del. m | Time delay for cutin of relay. |
| Volt 1 Cutout del. m | Time delay for cutout of relay. |
| Volt 1 High Al.Limit | The value for the high alarm limit. |
| Volt 1 Low Al.Limit | The value for the low alarm limit. |
| Volt 1 High Al.Dly m | Time delay for high alarm. |
| Volt 1 Low Al.Dly m | Time delay for low alarm. |
(Use Service Tool if data concerning Volt 2, 3, 4 and 5 are to be downloaded).
Alarm priorities
Measurements
| Parameter | Description |
|---|---|
| AK error | When "ON", the controller is in alarm condition. |
| Comp. Ctrl. temp. | Actual temperature for compressor control. |
| S4 Cold brine supply | Actual cold brine supply temperature measured with S4 temp. sensor. |
| S3 Cold brine return | Actual cold brine return temperature measured with S3 temp. sensor. |
| P0 °C | Suction pressure in °C. (Measured with the pressure transmitter). |
| Comp. ctrl. Ref. °C | Actual reference temperature for compressor control. |
| Compressor cap. % | Cut-in compressor capacity in % (of total capacity). |
| Request Comp. Cap % | Reference for compressor capacity (deviations may be due to time delays). |
| Cond. ctrl. temp °C | Actual temperature for control sensor (Pc or S7). |
| S7 warm brine °C | Actual warm brine temperature for S7 media sensor (Only used if S7 sensor is selected as regulation sensor). |
| Pc °C | Condensing pressure in °C. (measured with the pressure transmitter). |
| Cond. ctrl. ref. °C | Actual reference temp. for condenser capacity (incl. external reference signal, if any). |
| Cond. cap. % | Cut-in condenser capacity in % (of total capacity). |
| Request Cond. cap % | Reference for condenser capacity. |
Settings
| Parameter | Description |
|---|---|
| Main switch | ON: Regulation OFF: Controller stopped |
| Standby mode | Regulation has stopped. |
| Low P0 | Minimum safety limit for suction pressure P0 has been violated. |
| High S4 | High alarm limit for S4 has been exceeded. |
| Low S4 | Low alarm limit for S4 has been exceeded. |
| High Pc/Sd | Safety limit for condensing pressure Pc /discharge gas temperature is exceeded. |
| Superheat min/max | Superheat in suction line to low / high. |
| Load Shedding | Load shedding has been activated. |
| P0/S4 sensor error | Sensor signal for P0 / S4 is defective. |
| Misc. sensor error | Sensor signal for Ss, Sd, S3, Sc3, Saux is defective. |
| Cold pump alarm | Pump alarm. One of the pumps has fallen out. Signal from flow switch. |
| Cold pump 1 & 2 alarm | Pump alarm. Both pumps have fallen out. Signal from flow switch. |
| Anti freeze safety | All compressors have been cut out on frost protection. |
| Compr VSD safety | Variable speed drive for compressor has been cut out on safety. |
| Comp. 1 safety | Compressor has been cut out on safety. |
| Comp. 2 safety | Compressor has been cut out on safety. |
| Comp. 3 safety | Compressor has been cut out on safety. |
| Comp. 4 safety | Compressor has been cut out on safety. |
| Comp. 5 safety | Compressor has been cut out on safety. |
| Comp. 6 safety | Compressor has been cut out on safety. |
| Pc/S7 sensor error | Signal from pressure transmitter/temperature sensor is defective. |
| Blocked air flow | The intelligent air flow monitoring of the condenser reports that a cleaning is due. |
| Fan safety | Variable speed drive for condenser fans has been cut out on safety. |
| Max def. time | Defrost is stopped because of too long defrost time. Check evaporator. |
AKM menu: "For DANFOSS only"
This menu contains data and setting values for special internal controller functions. Do not change the stated values.
