Regulation Manual SYSAQUA 20 / 25 / 30 / 35 / 40 / 45 / 50 / 65 / 75 / 90 / 105 / 125 140 / 150 / 170 / 190 / 210 Air Cooled Water Chillers and Heat Pumps 19.5 â 217.6kW 19.3 â 208.
REGULATION MANUAL English MANUEL DE REGULATION Français REGELUNGSHANDBUCH Deutsch MANUALE DI REGOLAZIONE Italiano MANUAL DE REGULACIÓN Español
English 2 SYSAQUA CONTENTS 1. DESCRIPTION..................................................................................................................................................................................... 5 1.1. ABBREVIATIONS............................................................................................................................................................................................................................... 5 1.2. APPLICABLE UNITS...................
SYSAQUA 3 8.1. INTERNAL CLOCK...........................................................................................................................................................................................................................31 8.2. WATER CIRCUIT...............................................................................................................................................................................................................................31 8.2.1.
English 4 SYSAQUA
SYSAQUA 5 English 1. DESCRIPTION 1.1. ABBREVIATIONS Abb.
6 SYSAQUA English 1.3.1.2. SOFTWARE VERSION SYSAQUA1-2. 688.10101 Equipment Main regulator Integrated HMI Remote HMI Ventilation PV/GV Modulating Options Soft Starter Variable Pump Electric heating Power Command Power Command Single Double Hardware Firmware POL688 V11.22 POL871 V9.
SYSAQUA 7 English 2. PURPOSE 2.1. INTRODUCTION This document describes the functioning of the SIEMENS regulator for units of the SYSAQUA range. It is intended for the installation technician and the end user More complete information is available in the following documents: ² EDM : technical description of units and performances ² IOM : installation and maintenance recommendations, commissioning procedure 2.2.
English 8 SYSAQUA FPC As illustrated by the block diagrams, the singlecircuit units are equipped with two single-speed compressors mounted in tandem (M1 / M2), an air / refrigerant battery (3) swept by one or two axial fans (OF1 / OF2), a thermostatic expansion valve (6) and a water / refrigerant plate heat exchanger (8). The SYSAQUA.H heat pump type units are equipped with a 4-way valve (RV1) enabling teh switchover beween the hot and cold modes.
SYSAQUA 9 The SYSAQUA machines are thermodynamic machines,designed to operate within certain ranges of air and water temperature. The regulation sets up the security limits that guarantee units a correct operating point but also allow them to operate temporarily outside of this range in a secure manner (e.g. commissioning with a hot water loop in summer or a cold water loop in winter).
English 10 SYSAQUA 3. INTERFACES 3.1.
SYSAQUA 11 Q1 Alarm output Circuit 1 crankcase heater R1/R2 Q2 Circuit 1 Compressor 1 K1 Q3 Circuit 1 Compressor 2 K2 Q4 Circuit 1 4-way valve Pump 1 RV1 KWP1 Q5 Q6 Pump 2 Antifreeze electric heater KWP2 RAG Q7 Q8 Circuit 1 Slow speed fan Circuit 1 High speed fan Circuit 1 High-pressure pressostats KOF1-L KOF1-H HP1 DO1 DO2 DL1 Thermal protection pump 2 Frequency variator of pump 2 FTWP2 FDWP2 DL2 B1 B2 B3 EWT LWT OAT Water inlet temperature Water outlet temperature Air temperature
English 12 SYSAQUA 3.3. INTEGRATED DISPLAY This user interface is a liquid crystal display with 6 buttons. It is connected to the "BSP BUS" port of the regulators POL423, POL688 and POL687 with an RJ45 cable (maximum distance 2.5m). Up Info Alarm Down Escape Enter INFO From any screen, this button returns the user to the main menu or home screen and, like the ESCAPE button, invalidates a current modification.
SYSAQUA 13 English 3.5. WEB DISPLAY This interface is available on dual-circuit units connected to an IP¨network. A Web browser enables access to a unit indicating its IP address and using the WEB account (password: SBTAdmin!). 3.6. COMMUNICATION PROTOCOLS The available communication protocols depend on the unit regulator. Some are native to the regulator and others require an additional communication module.
English 14 SYSAQUA The units are connected either via the customer intranet or independently of the customer intranet via an optional 3G or 4G router.
SYSAQUA 15 English 4. THERMAL CONTROL 4.1. INTRODUCTION 4.1.1. LOAD AND CAPACITY The function of the SYSAQUA units is to maintain the client water circuit at the temperature specified by the client. The temperature of the water from the client network translates the client’s "charge" to which the unit must respond. The temperature of the water delivered by the unit translates its "capacity". Cooling / Heating production = CAPACITY Cooling / Heating request = LOAD 4.1.2.
16 SYSAQUA English 4.1.3. OPERATING MODES The SYSAQUA units offer three operating modes: ² Cooling mode = the unit cools the water circuit. The unit is regulated according to the water temperature sensor: If the measurement is less than the set-point: the unit is in stand-by, the pump is operating If the measurement is above the set-point: the thermodynamic cycle operates STAND-BY COOLING Setpoint Water temperature ² Heating mode = the unit heats the water circuit.
SYSAQUA 17 Temperature control ensures that the water sensor selected by the client (RWT or LWT) attains the actual set-point, SP*. To manage the compressors more efficiently, the control uses the concepts of load and capacity. Actual setpoint Load formulation SP* The load is calculated via an algorithm PI Kp minimizing the difference between the unit measurement and the set-point. δ Load The coefficients of PI depend on the range, + + the water temperature to be controlled and Kp/Ti the operating mode.
English 18 SYSAQUA 5. EQUIPMENT MANAGEMENT 5.1. TEMPERATURE SENSORS The temperatures are measured by CTN sensors 10kΩ. Resistance measurements are converted to temperature with coefficients scaled over the entire temperature range to ensure sufficient accuracy (<1 K) regardless of the operating point of the unit. Specific case of outside air temperature (OAT) The measurement of the CTN sensor undergoes several post-treatments.
SYSAQUA 19 The 4-way valve enables switching between cooling mode (valve deactivated) and heating mode (valve activated). Switchover requires either stopping the tandem for more than a minute, or a gap of less than 4 bar between the BP and the HP. 5.7. CARTER RESISTANCE 5.7.1.
English 20 SYSAQUA 6. ADDITIONAL FUNCTIONALITIES 6.1. WATER LAW The water law allows the temperature set-point to be adapted according to the exterior temperature. By default the water law is deactivated. Main Menu Status 1/4 Commissioning Commissioning 1/12 10:40:05 03.01.
To secure the unit at low temperatures, the water law automatically limits the effective set-point to the operating envelope (Refer to the § OPERATING ENVELOPES, page 9) : SP* = min [ f(OAT), envelope heating mode ] In the example below, the water law substitutes the operating envelope for function f below OAT -10 ° C. The shaded part of teh function f is therefore not retained. SP* (°C) 55 Envelope 50 A 45 B 40 C 35 -15 -10 -5 0 5 10 15 OAT (°C) 6.2.
22 SYSAQUA English 6.3. LOAD SHEDDING MODE Main Menu Status The load shedding mode limits the electrical power consumption of the unit by limiting its capacity. The amount limited is defined by a maximum value of capacity, setting between 0 and 100%. By default the load shedding mode is deactivated. The example below illustrates the limiting of the unit to 75% of its capacity. As long as load shedding is not activated, the unit adjusts its capacity to respond to load.
SYSAQUA 23 The fans turn at a fixed speed, that can be regulated between 0 and 100%. V Speed set-point 10 10V 0 Hz Voltage signal 50 50Hz 0 100 % REGULATOR Power frequency 10 V FREQUENCY INVERTER 6.5. "HIGH PRESSURE FANS” OPTION The “High Pressure Fans” option allows air rejected by the fans to be funneled. To meet the load drop due to the funneling, the fans deliver more pressure than the standard fans and are of AC type.
24 SYSAQUA English 6.6. "VARIABLE PRIMARY FLOW” OPTION Main Menu Status 1/4 Commissioning Services Configuration Manual control Defrost Operation hours Lock out Calibration Inputs-Outputs Parameters Archives Services Access 1/9 Configuration 1/8 Fan Pump Circuit control Contacts D1 D2 dT ret./sup. temp The "Variable Primary Flow" option is used to 20K Entering water T.
SYSAQUA 25 The speed of the pump depends on the capacity of the unit. This speed range is determined during commissioning to adjust the power of the pump to the load drops of the installation. When the load is insufficient to activate the 1st stage of capacity, the pump runs at a reduced speed to limit the consumption of electricity. Speed set-point 100% Mod.
English 26 SYSAQUA 6.6.3. VP MODE - CONSTANT OUTPUT PRESSURE The pump modulates its speed to maintain constant water pressure at the unit output. This pressure is measured by a pressure transducer mounted on the heat exchanger outlet tube. The load is calculated via an algorithm PI minimizing the difference between the transducer measurement and the set-point. Set-point SPHS + Kp δ Kp/Ti + Speed Water pressure The set-point depends on the installation. It can be adjusted during commissioning.
6.7. "ELECTRIC HEATING" OPTION Menu 1/4 The "Electric heating" option Main Status offers an electric assistance Commissioning to the thermodynamic circuit Services Access thanks to four immersion heaters mounted in the buffer tank.
28 SYSAQUA English Load formulation in booster mode The load is zero by default and is only calculated if the thermodynamic circuit reaches 100%. The BooOff offset for the set point switches off the immersion heaters before the compressors in order to give priority to thermodynamic operation.
SYSAQUA 29 Main Menu Status English 6.8. SCHEDULING Scheduling enables operating commands to be programmed throughout the week: 1/4 Commissioning 1/12 03.01.
30 SYSAQUA Information The HMI and the D1 contact are set to ON 2xBK T2 M B3 B2 M T1 B1 M OAT 1 D2 T4 D1 COM COM B A B A LWT 2xBK SD/N O 2xBK EWT T13 English 7.3. CASCADE OF PRIORITIES The table below shows the operating mode of the unit resulting from demands of various regulators according to their priority. EEV Status D2 MMI BMS Scheduling Resulting order None W.O. (*) W.O. (*) W.O. (*) W.O.
8. PROTECTIONS, EVENTS AND ALARMS The application has equipment protection procedures based on the sensors of the unit (temperature, pressure) and on the electromechanical safety devices (pressure switch, magneto-thermal circuit breaker, internal safety, etc.). Some procedures may temporarily change the operation of the unit and give rise to a event (e.g. preheating compressors, defrosting the battery, partial load operation, activation of antifreeze heaters, etc.
English 32 SYSAQUA 8.2.3.2. SYSAQUA 140/150/170/210 Good water circulation is controlled by 3 safety systems comprising the following, depending on options: 1. a water flow sensor (FS) The triggering of sensor (FS) represents a drop in water flow rate, below the minimum value for the unit. a "lack of water" pressure switch (WPS) The triggering of pressure switch (WPS) represents a de-pressurization of the water circuit. A lack of pressure can damage the hydraulic pump. 2.
SYSAQUA 33 8.3.1. THERMAL PROTECTION Compressors are protected from over-current by manual reset circuit breakers: ² SYSAQUA 20 to 125 : the circuit breaker contact is connected in series with that of the fans and the order controller and phase breaker. The "3phdet" alarm is triggered and stops the unit. ² SYSAQUA 140 to 210 : the alarm is triggered and suspends the circuit concerned circuit 1 : Therm.flt.cpr1 Circuit 1 or Therm.flt.cpr2 Circuit 1 circuit 2 : Therm.flt.cpr1 Circuit 2 or Therm.flt.
English 34 SYSAQUA 8.3.4. EVAPORATION PRESSURE Too low or too high a pressure at the suction of the compressor can damage it. Three levels of protection against too low pressure are implemented: 1. Protection: is triggered when the pressure is too low and raises an event. The protection limits the capacity of the circuit until the pressure rises above the protection threshold. SYSAQUA 20 to 125 LOP.prot.envelo. Circuit 1 SYSAQUA 140 to 210 circuit 1 LOP.prot.envelo.
SYSAQUA 35 1. Protection: is triggered when the pressure is higher than 39.7 bar and raises an event. The protection limits the capacity of the circuit until the pressure returns below the protection threshold. SYSAQUA 20 to 125 HPMax env.prot. Circuit 1 SYSAQUA 140 to 210 circuit 1 HPMax env.prot. Circuit 1 SYSAQUA 140 to 210 circuit 2 HPMax env.prot. Circuit 2 2. Safeguard: is triggered when the pressure increases despite being under protection, raises an alarm and suspends the circuit concerned.
36 SYSAQUA English 8.5. HYDRAULIC PUMPS The pumps are protected from over-current by manual reset circuit breakers: ² SYSAQUA 20 to 125 : the circuit breaker contact (FTWP) is wired in series with the flow sensor and the "Lack of Water" pressure switch. Triggering is treated in the same way.(Refer to the § WATER CIRCULATION, page 31) ² SYSAQUA 140 to 210 :the circuit breaker contact (FTWP) is wired separately (in the case of modulating speed, the inverter fault report (FDWP) is wired in series).
SYSAQUA 37 The triggering or repeated occurrence of an alarm after a certain lapse of time may reflect a problem with the unit's equipment or at installation level. To safeguard the equipment, the control suspends the unit or circuit concerned (Refer to the § LIST OF EVENTS, page 62 / Refer to the § LIST OF ALARMS, page 63). 8.10. DEFROST CYCLE 8.10.1. PRINCIPLES When the unit is operating in heating mode and the outdoor temperature is cool, air humidity may freeze on contact with the fins.
38 SYSAQUA English 8.10.3. CYCLE STOPPAGE CONDITIONS Three conditions can stop the defrosting cycle: 1. Dry battery (normal condition) : the battery is considered to be dry when the temperature reaches 18°C (adjustable between 16 and 20°C) 2.
9. USER INTERFACE 9.1. ORGANIZATION OF INFORMATION AND LEVEL OF ACCESS The HMI allows the state of the unit to be visualized and certain adjustments to be made. The information displayed depends upon: ² the configuration of the unit: information not related to the unit do not appear ² the access level: information requiring a higher access level are not displayed The information is organized into 5 menus.
40 SYSAQUA English 9.4. STATUS MENU Main Menu Status 1/4 Commissioning Services Access Status HMI status HMI mode Status from Actuak status Cooling setp. Current setp. cool Heating setp. Current setp. heat Load Capacity Hydraulic circuit Circuit 1 heaters 1/13 Delegate Automatic Schedul. Off 8.0°C 8.0°C 44°C 44°C 0.0% 0.
SYSAQUA 41 English 9.5. INSTALLATION MENU Limited access with the "Installer" or "Maintenance". Main Menu Status Commissioning Services Access 1/4 Commissioning 1/12 03.01.2021 10:40:05 Language selection Communications Glycolconcentr. 30% Auto changeover Water Law Reduced mode Load Shedding Cold OAT protection Small volume protection Scheduling Versions This menu allows the commissioning and installation to proceed: ² Defining the date and time.
English 42 SYSAQUA 9.6. MAINTENANCE MENU Limited access with the "Maintenance" profile.
9.7. ALARMS MENU If no alarm is active, pressing the "Alarm" button takes you to the alarm history Main overview 1/3 Current mode Red. H RWT 42.3°C LWT 45.2°C Alarm history 1/5 Entries 4 - Discharge T. Circuit 1 : op. loop... + Discharge T. Circuit 1 : op. loop... + Condensing P. Circuit 1: op. loop... + Evaporating P. Circuit 1: op. loop. If at least one alarm or event is active, the alarm button flashes.
English 44 SYSAQUA 9.7.1. ALARM DETAILS This page is displayed : ² Details of the last active alarm ² If you request the details of an alarm in the list of active alarms ² If you request the details of an alarm in the alarms history Alarm liste detail 1/4 +Condensing P. Circuit 1: Op... Priority Critical(A) Occured: 08:13:33 > 03.01.21 Alarm designation Alarm critical level Date and time of the alarm 9.7.2.
SYSAQUA 45 English 10. AUTOMATIC ARCHIVING 10.1. SAVING ARCHIVES Information Activating this function requires integration of an SD card into the regulator. The regulator records the variables of the unit in CSV format. The values are recorded according to the principle of the circular buffer in the controller internal memory. The data is transferred to the standard SD card depending on the configuration set up during the installation.
English 46 SYSAQUA 11. MANAGEMENT OF SITE AND APPLICATION PARAMETERS 11.1. SAVING OF PARAMETERS ON AN SD CARD The unit parameters can be recovered with a standard SD card. This conserves a copy of he settings made during commissioning or after an intervention. 1. Insert the unlocked SD card into the regulator POL 423 2.
SYSAQUA 47 English 11.2. RELOADING PARAMETERS FROM AN SD CARD The unit parameters contained on the SD card can be reinserted into the regulator. Caution The SD card must contain only one parameters file (*.ucf) 1. Switch on the regulator. 2. Insert the locked SD card into the regulator. 3. Access the "Maintenance" level, then go to "Maintenance Parameters Settings load. <- SD" 4. Select "Execute". 5. The "Full>Wait 2m for Restart” message appears. 6.
English 48 SYSAQUA 12. COMMUNICATION 12.1. MODBUS 12.1.1. FACTORY CONFIGURATION The configuration can be modified using the removable or remote HMI. Setting Physical layer RTU Address Speed Parity Number of stop bits TCP/IP DHCP Default value Range RTU RTU (RS485), TCP/IP (Ethernet) 1 1 … 247 9600 bauds 2400, 4800, 9600, 19200, 38400 none none, even, odd 1 bit 1…2 active inactive, active 12.1.2.
SYSAQUA 49 Variable Symbol Unit Type Gain Off. Registre SYSAQUA 20 to 125 SYSAQUA 140 to 210 ComSta enum UW 1 0 40 001 4 4 ComMod enum UW 1 0 40 002 4 4 OpModHMI enum UW 1 0 40 039 4 4 ChoHMI enum UW 1 0 40 040 4 4 CtrlSta enum UW 1 0 30 001 4 4 CtrlMod enum UW 1 0 30 002 4 4 CurOp enum UW 1 0 30 003 4 4 EWT LWT OAT Req Cap °C °C °C % % SW SW SW UW UW 0.01 0.01 0.01 0.01 0.
English 50 SYSAQUA Symbol Unit Type Gain Off. Registre SYSAQUA 20 to 125 SYSAQUA 140 to 210 SPC SPH SPC* SPH* °C °C °C °C SW SW SW SW 0.01 0.01 0.01 0.01 0 0 0 0 40 003 40 004 30 031 30 032 4 4 4 4 4 4 4 4 enum UW 1 0 40 005 4 4 K K K SW SW SW 0.01 0.01 0.01 0 0 0 40 006 40 007 40 008 4 4 4 4 4 4 circuit 1 low noise shift in cooling mode bar SW 0.01 0 40 009 4 4 circuit 1 low noise shift in heating mode bar SW 0.
Variable Unit Type Gain Off. Registre SYSAQUA 20 to 125 SYSAQUA 140 to 210 h min s year month day UW UW UW UW UW UW 1 1 1 1 1 1 0 0 0 0 0 0 40 119 40 120 40 121 40 122 40 123 40 124 4 4 4 4 4 4 4 4 4 4 4 4 - B 1 0 10 004 4 4 - B 1 0 10 005 4 B 1 0 10 006 4 % UW 1 0 30 035 4 4 OCT BP HP CST CDT SH °C bar bar °C °C K SW UW UW SW SW SW 0.01 0.01 0.01 0.01 0.01 0.
English 52 SYSAQUA Variable Circuit 2 Coil temperature Evaporating pressure Condensing pressure Suction temperature Discharge temperature Superheat Reverse valve status: 0 = inactive 1 = active Compressor 1 status: 0= OFF 1 = ON Compressor 2 status: 0= OFF 1 = ON Cranckcase heater status: 0 = OFF 1 = ON AC FAN status: 0 = NULL 1 = OFF 2 = Stage 1 3 = Stage 2 Modulating fan speed EEV position order Evaporating temperature Condensing temperature Electrical heaters Requested load Heater 1 status : 0 = OFF 1 =
Variable OAT sensor alarm : 0 = alarm inactive 1 = alarm active Water pump 1 alarm: 0 = alarm inactive 1 = alarm active Water pump 2 alarm: 0 = alarm inactive 1 = alarm active Frost protection alarm: 0 = alarm inactive 1 = alarm active Circuit 1 OCT sensor alarm: 0 = no sensor alarm 1 = in sensor alarm LP sensor alarm: 0 = sensor alarm inactive 1 = sensor alarm active HP sensor alarm: 0 = sensor alarm inactive 1 = sensor alarm active CST sensor alarm: 0 = sensor alarm inactive 1 = sensor alarm active CDT se
English 54 SYSAQUA Variable Circuit 2 OCT sensor alarm: 0 = no sensor alarm 1 = in sensor alarm LP sensor alarm: 0 = sensor alarm inactive 1 = sensor alarm active HP sensor alarm: 0 = sensor alarm inactive 1 = sensor alarm active CST sensor alarm: 0 = sensor alarm inactive 1 = sensor alarm active CDT sensor alarm: 0 = sensor alarm inactive 1 = sensor alarm active SH alarm: 0 = alarm inactive 1 = alarm active Fan circuit breaker alarm: 0 = alarm inactive 1 = alarm active C1 circuit breaker alarm: 0 = alarm
SYSAQUA 55 English 12.2. BACNET 12.2.1. FACTORY CONFIGURATION The configuration can be modified using the removable or remote HMI. Maximum number of devices: Speed 76800 38400 19200 Number of devices 64 32 Not recommended 12.2.1.1. SYSAQUA 20/25/30/35/40/45/55/65/75/90/105/125 Setting Address MS/TP Mac Master Device Addresses Slave Device Addresses Speed Max info Frames Default value Range 1 1 … 254 1 1 … 127 128 128 … 254 76800 bauds 9600, 19200, 38400, 76800 1 1 ... 32 12.2.1.2.
56 SYSAQUA English 12.2.2.
SYSAQUA 20 to 125 SYSAQUA 140 to 210 61647 19350 34868 223443 245372 4 4 4 4 4 4 4 4 4 4 4 4 Analog Value 20968 4 4 enum RW MS Value 20252 4 4 WLCAT WLCAD WLCBT WLCBD WLHAT WLHAF WLHBT WLHBF WLHCT WLHCF °C K °C K °C °C °C °C °C °C RW RW RW RW RW RW RW RW RW RW Analog Value Analog Value Analog Value Analog Value Analog Value Analog Value Analog Value Analog Value Analog Value Analog Value 49973 6888 28471 46826 10236 8986 14301 15459 26488 55364 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
English 58 SYSAQUA Variable Circuit 1 Coil temperature Evaporating pressure Condensing pressure Suction temperature Discharge temperature Superheat Reverse valve status: 0 = inactive 1 = active Compressor 1 status: 0= OFF 1 = ON Compressor 2 status: 0= OFF 1 = ON Cranckcase heater status: 0 = OFF 1 = ON AC FAN status: 0 = NULL 1 = OFF 2 = Stage 1 3 = Stage 2 Modulating fan speed EEV position order Evaporating temperature Condensing temperature Circuit 2 Coil temperature Evaporating pressure Condensing pres
Variable Heater 2 status: 0 = OFF 1 = ON ALARMS Unit Time setting: 0 = alarm inactive 1 = alarm active Flowswitch protection : 0 = alarm (flowrate too small) 1 = no alarm (flowrate OK) Water pump 1 alarm: 0 = alarm inactive 1 = alarm active Water pump 2 alarm: 0 = alarm inactive 1 = alarm active Frost protection alarm: 0 = alarm inactive 1 = alarm active Circuit 1 X8 breakers alarm (POL423): 0 = alarm inactive 1 = alarm active D1 breakers alarm (POL688): 0 = alarm inactive 1 = alarm active Fan circuit break
English 60 SYSAQUA 13. OVERVIEW OF THE HMI 13.1. SYSAQUA 20/25/30/35/40/45/55/65/75/90/105/125 Main overview 1/3 Current mode Red. H RWT 42.3°C LWT 45.2°C Main Menu Status 1/4 1/3 Hydraulic circuit Access 1/13 Delegate Automatic Schedul. Off 8.0°C 8.0°C 44°C 44°C 0.0% 0.0% Commissioning 1/12 03.01.
13.2. SYSAQUA 140/150/170/190/210 Main overview 1/3 Current mode Red. H RWT 42.3°C LWT 45.2°C Main Menu Status 1/4 1/3 Hydraulic circuit Access 1/13 Delegate Automatic Schedul. HMI 8.0°C 8.0°C 44°C 44°C 0.0% 0.0% Commissioning 1/12 03.02.
English 62 SYSAQUA 14. LIST OF EVENTS Message Definition Triggering threshold Desc. Defrost req.delta temp. Circuit 1 Defrosting by delta T Variable according to OAT § 8.10. DEFROST CYCLE, page 37 Defrost req.delta temp. Circuit 2 Defrosting by delta T Variable according to OAT § 8.10. DEFROST CYCLE, page 37 Defrost before shutdown Circuit 1 Defrosting prior to circuit stop 13K § 8.10. DEFROST CYCLE, page 37 Defrost before shutdown Circuit 2 Defrosting prior to circuit stop 13K § 8.10.
Cut-off of safety system X6 Cut-off of safety system X7 Cut-off of safety system X6 Cut-off of safety system X7 circuit circuit circuit circuit circuit unit Defrosting stopped because overlong Defrosting stopped because overlong Fault in communication with electronic pressure reducing valve Fault in communication with electronic pressure reducing valve defrosting by low evaporation pressure compressor circuit breaker C1.1 (SYSAQUA 140 circuit to 210) compressor circuit breaker C1.
/ double pump circuit breaker no.2 (SYSAQUA 140 to 210) General pump fault (SYSAQUA 140 to 210) Anti-freeze protection HP/HP1 pressure switch Max. condensation pressure Min. condensation pressure Min. condensation pressure HP2 pressure switch Max. condensation pressure Min. condensation pressure Min. condensation pressure Min. evaporation pressure Min. evaporation pressure Min. evaporation pressure Min. evaporation pressure Max. evaporation pressure Max. evaporation pressure Max.
Sensor FPC2 in short-circuit Sensor FPE/FPE1 at low limit Sensor FPE/FPE1 in open loop Condensing P.shortedLoop Circuit 2 Min.evap.press. Evaporating P.openLoop Circuit 1 circuit circuit circuit circuit circuit circuit circuit circuit circuit HP/BPmax.env.lck Circuit 1 Max. pressure ratio Min. pressure ratio Min. pressure ratio Max. pressure ratio HP/BPmin.envel. Circuit 1 HP/BPmin.env.lck Circuit 1 HP/BPmax.envel. Circuit 2 HP/BPmax.env.lck Circuit 2 Max. pressure ratio HP/BPmin.envel.
Invalid date Sensor OAT at low limit Sensor OAT in open loop Set date & time TOa.lowLimit TOa.openloop unit unit unit circuit circuit High temperature protection CDT2 circuit T.discharge.prot Circuit 2 Sensor CDT2 at low limit Pdc2Discharge T.lowLimit circuit High temperature protection CDT/CDT1 Sensor CDT/CDT1 in short circuit Pdc Discharge T.shortedloop circuit T.discharge.prot Circuit 1 Sensor CDT/CDT1 in open loop Pdc:Discharge T.
Definition Sensor OAT in short-circuit Sensor EWT at low limit Sensor EWT in open loop Sensor EWT in short-circuit Sensor OCT/OCT1 at low limit Sensor OCT/OCT1 in open loop Sensor OCT/OCT1 in short circuit Sensor OCT2 at low limit Sensor OCT2 in open loop Sensor OCT2 in short-circuit Sensor LWT at low limit Sensor LWT in open loop Message TOa.shortedLoop RWT.lowLimit RWT.openloop RWT.shortedLoop Coil T.lowLimit Circuit 1 Coil T.openloop Circuit 1 Coil T.shortedloop Circuit 1 Coil T.
circuit Suction T.shortedloop Circuit 1 circuit circuit Suction T.openloop Circuit 2 Sensor CST2 in open loop Sensor CST2 in short-circuit Low overheating fault, circuit 1 Low overheating fault, circuit 2 Internal memory full Suction T.shortedloop Circuit 2 Pdc:SHAlmCnt Pdc2:SHAlmCnt ArchFull / circuit circuit circuit Suction T.lowLimit Circuit 2 Sensor CST2 at low limit Sensor CST1 in short-circuit circuit Suction T.
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