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Summary of Contents for MTA AS 201 FC
- Page 1 W a t e r c h i l l e r s AS 201÷751 FC OPERATIN G AN D IN STRUC TION MANU AL Original instructions in Italian language...
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Page 3: Table Of Contents
OPERATING AND INSTRUCTION MANUAL Index N D E X ..............................1 NDEX ........................3 ENERAL INFORMATION Terminology..................... 3 Symbols ......................3 How to interpret the model ................4 How to interpret the code................. 4 How to interpret the alphanumeric string-code ..........4 ............ - Page 4 OPERATING AND INSTRUCTION MANUAL Index Operation......................21 Maintenance ....................21 8.2.1 Access to the inside of the machine ..............21 8.2.2 Maintenance Schedule ...................22 .........................23 ROUBLE SHOOTING AS 201÷751 FC The data in this manual are not binding and may be changed by the manufacturer without notice. Reproduction of this manual, even partial, is strictly prohibited.
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Page 5: G Eneral Information
OPERATING AND INSTRUCTION MANUAL General information HAPTER E N E R A L I N F O R M A T I O N 1 . 1 T e r m i n o l o g y This manual is written for those responsible for the installation, use and maintenance of the unit. The machines described in this manual are called “WATER CHILLERS”... -
Page 6: How To Interpret The Model
OPERATING AND INSTRUCTION MANUAL General information 1 . 3 H o w t o i n t e r p r e t t h e m o d e l MODEL DESCRIPTION X X X Version of the unit (N, SN or SSN) Free Cooling version Number of circuits (always 1) Compressors nominal power in HP... - Page 7 OPERATING AND INSTRUCTION MANUAL General information POS. VALUE DESCRIPTION VOLTAGE 400/3/50 CUSTOMISING STANDARD VERSION 4-5-6 REFRIGERANT R407C AMBIENT MINIMUM TEMPERATURE STANDARD -15°C EVAPORATOR SHELL AND COIL FINS COIL ELECTRONIC THERMOSTATIC VALVE HYDRAULIC GROUP NONE P2+P2 STORAGE + P2 STORAGE + P2+P2 P3+P3 STORAGE + P3 STORAGE + P3+P3...
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Page 8: T Echnical Data , Performance And Operating Limits
These data are defined during the offer stage and it is to these that reference should be made. 2 . 2 S o u n d L e v e l M e a s u r e m e n t s Model AS 201 FC AS 251 FC AS 301 FC AS 351 FC... -
Page 9: General
OPERATING AND INSTRUCTION MANUAL Safety HAPTER A F E T Y ATTENTION This machinery was designed to be safe in the use for which it was planned provided that it is installed, started up and maintained in accordance with the instructions contained in this manual. The manual must therefore be studied by all those who want to install, use or maintain the machinery. -
Page 10: Precautions During Operation
OPERATING AND INSTRUCTION MANUAL Safety If raised platforms are required to provide access to the unit they must not interfere with normal operation or obstruct access for lifting or dismantling components. Platforms and stairs should be of grid or plate construction with safety rails on all open sides. If the unit is installed in the open air, ensure that it is not exposed to very strong winds. -
Page 11: Safety Schedule
OPERATING AND INSTRUCTION MANUAL Safety 3 . 3 . 1 Sa f e t y s c h e d u l e R407C Denomination: 23% Difluoromethane (R32); 25% Pentafluoroethane (R125); 52% R134a INDICATION OF THE DANGERS Major dangers: Asphyxia Specific dangers: Rapid evaporation can cause freezing FIRST AID MEASURES... -
Page 12: D Escription
The evaporator consists of a U-type pipe-bundle exchanger in which the coolant fluid, that comes from the refrigerant circuit, evaporates removing heat from the water to be cooled which flows on the plating side. The water connections are with threading, from model AS 201 FC to model AS 601 FC. From model AS 701 FC they are of “Victaulic” type. -
Page 13: Hydraulic Circuit
OPERATING AND INSTRUCTION MANUAL Description ATTENTION The fluid flow rate which flows on the plating side must not exceed the values specified in the table of paragraph "5.5 Hydraulic connections". 4 . 3 H y d r a u l i c c i r c u i t The hydraulic circuit is equipped with the following components: •... -
Page 14: Casing
OPERATING AND INSTRUCTION MANUAL Description On request the units can be furnished with an higher lift pump. NOTE The pump must never run dry. 4 . 4 . 1 C a s i n g The casing is built with galvanised panels and painted with polyester resins. 4 . -
Page 15: I Nstallation
The performances of the Aries free-cooling units take into consideration the use of a mixture of water and glycol at 30%. The glycol percentage can be chanced, but MTA suggests the use of a mixture of water and glycol in order to prevent the formation of ice and breakings. - Page 16 The hydraulic system must be dimensioned so that water doesn’t flow in the machine with pressure values in excess of the value on the specification plate and flows greater than those set out in the table below: EVAPORATOR Maximum flow [m AS 201 FC AS 251 FC AS 301 FC AS 351 FC...
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Page 17: Electrical Connections
OPERATING AND INSTRUCTION MANUAL Installation 5 . 6 E l e c t r i c a l c o n n e c t i o n s The connection of the unit to the power supply network must be done in conformity with the laws and prescriptions in force in the installation place. The power supply voltage, the frequency and the phase number must be as shown on the unit data plate. - Page 18 OPERATING AND INSTRUCTION MANUAL Start up HAPTER T A R T U P ATTENTION Before starting up or operating these units be sure that all personnel have read and understood the chapter " Safety" of this manual. Check that the machine on/off valves are open. If the hydraulic circuit is of the closed type, check that an expansion tank has been installed with an adequate capacity.
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Page 19: A Djustment And Control
OPERATING AND INSTRUCTION MANUAL Adjustment and control HAPTER D J U S T M E N T A N D C O N T R O L 7 . 1 F o r c e d v e n t i l a t i o n o f t h e e l e c t r i c a l b o a r d All units are equipped with a fan thermostat system in the electric board. -
Page 20: Pump Antifreeze Function
Freeze protection setpoint set at 5°C. To lower the freeze protection setpoint, modify mask NOTE To lower the freeze protection setpoint, contact the MTA after-sales service and add a suitable amount of antifreeze solutions to the system (see chap. 5.4 “Antifreeze protection” ). -
Page 21: Pressure Transducers
OPERATING AND INSTRUCTION MANUAL Adjustment and control 7 . 8 P r e s s u r e t r a n s d u c e r s For further information see the enclosed CO manual. The Aries Free-Cooling units are equipped with a low pressure switch and an high pressure switch for each circuit. Measuring the inlet and outlet pressures of the compressors, they control the unit operation, according to the pressure setpoint values adjusted by With these values it is possible to control the following functions of each circuit separately: •... -
Page 22: Level Sensor
50 K ÷ 500 K ATTENTION MTA sets the level sensor to operate with sensitivity of 250kOhm (setting =H on “Empty” side). The level sensor is set by the producer and its calibration must not be modified. ATTENTION An anti-tamper label is applied over the setting trimmers (A and B). -
Page 23: O Peration And Maintenance
OPERATING AND INSTRUCTION MANUAL Operation and maintenance HAPTER P E R A T I O N A N D M A I N T E N A N C E 8 . 1 O p e r a t i o n The machine operates in completely automatic mode. -
Page 24: Maintenance Schedule
OPERATING AND INSTRUCTION MANUAL Operation and maintenance 8 . 2 . 2 M a i n t e n a n c e S c h e d u l e OPERATION Annually Month Months Check control panel display for any alarm signals. ... -
Page 25: T Rouble Shooting
OPERATING AND INSTRUCTION MANUAL Trouble shooting HAPTER R O U B L E S H O O T I N G PROBLEM CAUSE SYMPTOM REMEDY A1.1 Increase the pressure drop in the water circuit (e.g.: by partially closing a Water outlet temperature Water flow too high. - Page 26 OPERATING AND INSTRUCTION MANUAL Trouble shooting PROBLEM CAUSE SYMPTOM REMEDY D1.1 Repair or replace the fan. Verify the heat protection of the fan/s. High pressure alarm tripped One or more fans don’t work. • Refrigerant compressor stops; (SEE pCO MANUAL) •...
- Page 27 OPERATING AND INSTRUCTION MANUAL Trouble shooting PROBLEM CAUSE SYMPTOM REMEDY K1.1 Identify and remove the cause. If necessary, adjust alarm temperature Low water outlet temperature Set point value of alarm, stored, • See problem; set point to a value lower than that alarm tripped is higher than value measured by •...
- Page 28 OPERATING AND INSTRUCTION MANUAL Trouble shooting AS 201÷751 FC The data in this manual are not binding and may be changed by the manufacturer without notice. Reproduction of this manual, even partial, is strictly prohibited.
- Page 29 p C O E l e c t r o n i c C o n t r o l C H I L L E R S A R I E S F R E E - C O O L I N G E L E C T R O N I C C O N T R O L I N S T R U C T I O N M A N U A L AS 201÷751 FC Original instructions in Italian language...
- Page 31 ELECTRONIC CONTROL INSTRUCTION MANUAL Index N D E X ..............................1 NDEX Chapter 1 ......................3 ECHNICAL CHARACTERISTICS Structure of units....................3 Components of pCO network ................3 pCO inlet and outlet connections..............3 Layout of module network................4 Terminal unit....................4 Hardware addressing of the local/remote terminal ..........
- Page 32 ELECTRONIC CONTROL INSTRUCTION MANUAL Index Modbus......................22 Gsm ........................ 22 Direct Modem (Rs232)................... 22 LonWorks....................... 23 Variables managed by the electronic control ..........23 9.6.1 Digital variables .....................23 ..............27 9.6.2 Analogue variables 9.6.3 Entire variables ....................29 Chapter 10 ....................33 ASKS NO PASSWORD REQUIRED 10.1 Menu ......................
- Page 33 ELECTRONIC CONTROL INSTRUCTION MANUAL Technical characteristics HAPTER E C H N I C A L C H A R A C T E R I S T I C S 1 . 1 S t r u c t u r e o f u n i t s All units have one circuit and are equipped with two SCROLL compressors.
- Page 34 ELECTRONIC CONTROL INSTRUCTION MANUAL Technical characteristics L a y o u t o f m o d u l e n e t w o r k 1 . 4 On each unit is installed a board which, together with the terminal, constitutes pCO network. The unit can operate in an independently way (LOCAL operation) or can operate connected to other units (until four units max., MODULAR operation).
- Page 35 ELECTRONIC CONTROL INSTRUCTION MANUAL Technical characteristics 1 . 7 H o w t o s e t t h e s o f t w a r e a d d r e s s b e t w e e n t h e t e r m i n a l a n d t h e b o a r d ATTENTION Before carrying out the following operations be sure that all the wiring of the board and of the terminal have been correctly carried out (see...
- Page 36 ELECTRONIC CONTROL INSTRUCTION MANUAL Technical characteristics 1 . 8 H o w t o a d d r e s s t h e e l e c t r o n i c t h e r m o s t a t i c v a l v e s The electronic thermostatic valves, positioned inside the refrigerant circuit, must be addressed by means of their dip-switches of the Driver positioned in the electrical panel (see Fig.4) in order to operate correctly EVD D...
- Page 37 ELECTRONIC CONTROL INSTRUCTION MANUAL Technical characteristics 1 . 1 0 H o w t o w i r e t h e r e m o t e t e r m i n a l ( o p t i o n a l ) LOCAL Adr: 3 REMOTE Adr: 13 Fig.7...
- Page 38 ELECTRONIC CONTROL INSTRUCTION MANUAL Pressure and temperature transducers HAPTER R E S S U R E A N D T E M P E R A T U R E T R A N S D U C E R S 2 .
- Page 39 ELECTRONIC CONTROL INSTRUCTION MANUAL Pressure and temperature transducers 2 . 4 L o c a t i o n o f t r a n s d u c e r s To identify the temperature and pressure transducers and verify their location, please consult the refrigerant drawing annexed to the manual. The presence of absence of any transducer depends on the unit type.
- Page 40 ELECTRONIC CONTROL INSTRUCTION MANUAL Utilisation of the terminal HAPTER T I L I S A T I O N O F T H E T E R M I N A L 3 . 1 D i s p l a y o f p C O t e r m i n a l The display of pCO terminal is used to show the information about the unit status and to change the values of programmable parameters.
- Page 41 ELECTRONIC CONTROL INSTRUCTION MANUAL Utilisation of the terminal 3 . 1 . 1 D i s p l a y i n g / s i g n a l l i n g m a s k s In the electronic control are available other displaying and signalling masks. These masks are displayed after a period of transition during which no button of pGD is pressed.
- Page 42 ELECTRONIC CONTROL INSTRUCTION MANUAL Utilisation of the terminal 3 . 2 T e r m i n a l b u t t o n s The functions of pGD terminal buttons are explained here below: Utilized to return from the various menus to the main displaying mask. If pressed once it allows to enter DIRECT loop.
- Page 43 ELECTRONIC CONTROL INSTRUCTION MANUAL Unit starting and stopping HAPTER N I T S T A R T I N G A N D S T O P P I N G 4 . 1 U n i t s t a r t - u p When the installation and electrical connections have been made, operate on the unit general switch-breaker (on the electrical panel) putting it in ON position.
- Page 44 ELECTRONIC CONTROL INSTRUCTION MANUAL Access to the programming HAPTER C C E S S T O T H E P R O G R A M M I N G The electronic control is furnished with two main menus: FREE menu (PASSWORD NOT needed) see "5.1 How to modify a parameter in “Free Menu”" It can be accessed by pressing and releasing button.
- Page 45 ELECTRONIC CONTROL INSTRUCTION MANUAL Access to the programming 5 . 2 H o w t o m o d i f y a p a r a m e t e r o f “ P a s s w o r d M e n u ” Enable the password menu pressing for 5 sec.
- Page 46 ELECTRONIC CONTROL INSTRUCTION MANUAL Access to the programming 5 . 3 H o w t o m o d i f y t h e l a n g u a g e The pCO allows to choose the language of the masks. The available languages are: Italian, English, German, French and Spanish.
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Page 47: Setpoint Second Summer Setp. 000.0Ssc
ELECTRONIC CONTROL INSTRUCTION MANUAL Main settings HAPTER A I N S E T T I N G S ATTENTION Each unit is delivered ready to work, therefore all the control parameters have been already set during the testing operation and it isn’t necessary to modify them. -
Page 48: Ssc 00.0Ssc
ELECTRONIC CONTROL INSTRUCTION MANUAL Main settings 6 . 2 H o w t o m o d i f y t h e d i f f e r e n t i a l v a l u e If the unit is off, switch it on by means of the main breaker of the electrical panel and wait at least one minute to allow pCO net to stabilize;... - Page 49 ELECTRONIC CONTROL INSTRUCTION MANUAL Free-Cooling system management HAPTER R E E O O L I N G S Y S T E M M A N A G E M E N T The pCO control manages the Free-Cooling system. It activates or deactivates the Free-Cooling system according to the medium ambient temperature “Tamb”, which is checked by the BAT1 and BAT2 probes and the unit inlet water temperature “Tin FC”, which is checked by the BFCIT probe.
- Page 50 ELECTRONIC CONTROL INSTRUCTION MANUAL Single or double pump operation management HAPTER I N G L E O R D O U B L E P U M P O P E R A T I O N M A N A G E M E N T 8 .
- Page 51 ELECTRONIC CONTROL INSTRUCTION MANUAL Single or double pump operation management 8 . 2 . 1 M a n u a l r o t a t i o n When the pump “automatic rotation” is disabled, pCO allows to manually manage the pump by enabling the single pump using the mask “ ...
- Page 52 ELECTRONIC CONTROL INSTRUCTION MANUAL Supervision system HAPTER U P E R V I S I O N S Y S T E M pCO can manage various supervision protocols. They can be: • CAREL • MODBUS • • DIRECT MODEM •...
- Page 53 ELECTRONIC CONTROL INSTRUCTION MANUAL Supervision system 9 . 5 L o n W o r k s Ref. U2 Setting LonWorks protocol in mask pCO allows to use the supervision system. LonWorks protocol allows pCO to be managed by a remote supervisor by connecting it directly to a LonWorks network. The communication between pCO and the LonWorks protocol is carried out following the RS485 standard, for this reason it is necessary to install an appropriate interface.
- Page 54 ELECTRONIC CONTROL INSTRUCTION MANUAL Supervision system Variable Variable type for Variable name Description Flow address LonWorks network Not utilized Not utilized Not utilized Not utilized Not utilized Not utilized Not utilized QEPROMNOOK Flash memory malfunction alarm QAL_CLOCK Clock damaged alarm QAL_FLUS_ACQ Water differential pressure switch alarm QAL_LIV_SERB...
- Page 55 ELECTRONIC CONTROL INSTRUCTION MANUAL Supervision system Variable Variable type for Variable name Description Flow address LonWorks network QAL_ORE_C_1_1 Compressor 1 of circuit 1 maintenance alarm QAL_ORE_C_1_2 Compressor 2 of circuit 1 maintenance alarm QAL_ORE_C_1_3 Compressor 3 of circuit 1 maintenance alarm QAL_ORE_C_2_1 Compressor 1 of circuit 2 maintenance alarm QAL_ORE_C_2_2...
- Page 56 ELECTRONIC CONTROL INSTRUCTION MANUAL Supervision system Variable Variable type for Variable name Description Flow address LonWorks network EN_SONDA_B2 Water outlet temperature probe -BEWOT enable In/Out EN_SONDA_B3 Coil 1 temperature probe -BD1 enable In/Out EN_SONDA_B11 Coil 2 temperature probe -BD2 enable In/Out EN_SONDA_B5 High pressure probe -BHP1 of circuit 1 enable...
- Page 57 ELECTRONIC CONTROL INSTRUCTION MANUAL Supervision system Variable Variable type for Variable name Description Flow address LonWorks network ABIL_SBR_DT Defrost for dt enable ABIL_SBR_TEMP Defrost in temperature enable FINE_SBR_TEMP End of defrost in temperature enable AB_SBR_SINGOLO Single defrost enable AB_BI_SBR Defrost on double-circuits enable IGITAL VARIABLES Table 4 9 .
- Page 58 ELECTRONIC CONTROL INSTRUCTION MANUAL Supervision system Variable Variable type for Variable name Description Flow address LonWorks network SET_FASCIA3_INV Winter temperature setpoint hourly band 3 In/Out SET_FASCIA4_EST Second summer temperature setpoint hourly band 4 In/Out SET_FASCIA4_INV Winter temperature setpoint hourly band 4 In/Out MAX_SET_EXT Max.
- Page 59 ELECTRONIC CONTROL INSTRUCTION MANUAL Supervision system Variable Variable type for Variable name Description Flow address LonWorks network SET_POMP_ANTIG Setpoint enable pump as antifreeze In/Out DIFF_POMP_ANTIG Differential pump as antifreeze In/Out SUPER_HEAT_SET_CH Overheating regulation setpoint in CH In/Out SUPER_HEAT_SET_HP Overheating regulation setpoint in HP In/Out SUPER_HEAT_SET_DF Overheating regulation setpoint in DF...
- Page 60 ELECTRONIC CONTROL INSTRUCTION MANUAL Supervision system Variable Variable type for Variable name Description Flow address LonWorks network TIME_TRA_RECUP Min. time between two recoveries In/Out TIME_MINON_REC Min. time of on recovery In/Out TIME_MINOFF_REC Min. time of off recovery In/Out TIME_RECUP_T1 Delay on outlet recovery enable In/Out TIME_RECUP_T2 Min.
- Page 61 ELECTRONIC CONTROL INSTRUCTION MANUAL Supervision system Variable Variable type for Variable name Description Flow address LonWorks network RIT_DISAT_GRAD Delay between stops out of neutral zone In/Out RIT_AT_INT_GRAD Delay between starts in of neutral zone In/Out TEMPO_INTEGRA PI control integration time In/Out RIT_ON_COMP Delay on compressor start at unit start...
- Page 62 ELECTRONIC CONTROL INSTRUCTION MANUAL Supervision system Variable name Bit Nr. Single bit description WORD_IN_OUT_1 Status of digital inlet 13 (0=Closed - 1=Opened) WORD_IN_OUT_1 Status of digital inlet 14 (0=Closed - 1=Opened) WORD_IN_OUT_1 Status of digital inlet 15 (0=Closed - 1=Opened) WORD_IN_OUT_1 Status of digital inlet 16 (0=Closed - 1=Opened) WORD_IN_OUT_2...
- Page 63 ELECTRONIC CONTROL INSTRUCTION MANUAL Masks no password required HAPTER A S K S N O P A S S W O R D R E Q U I R E D DANGER The wrong pCO programming can cause big damages to the unit; if there is any doubt please call an authorised service centre.
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Page 64: Summer Setpoint Second
ELECTRONIC CONTROL INSTRUCTION MANUAL Masks no password required 1 0 . 2 F r e e M e n u Press and release button on the terminal to access the loop mask (Free Menu); to modify a parameter see Chapter 5 “How to modify a parameter in “Free Menu”“... -
Page 65: Time Band 3
ELECTRONIC CONTROL INSTRUCTION MANUAL Masks no password required Ref. Mask Range Notes Use this mask to set the starting hour and the setpoint of the third band. ÷ ÷ Time Band 3 step: 00.1 Starting Time 00:00 Summer Set 000.0ßC... - Page 66 ELECTRONIC CONTROL INSTRUCTION MANUAL Masks no password required Ref. Mask Range Notes Values measured by high pressure transducers of circuits 1, expressed in °C. This mask will be displayed only if -BHP1 probe has been previously High Pressure: enabled. Circuit 1 000.0ßC For further information see Chapter 2 “Pressure and temperature transducers“...
- Page 67 ELECTRONIC CONTROL INSTRUCTION MANUAL Masks requiring a password HAPTER A S K S R E Q U I R I N G A P A S S W O R D 1 1 . 1 M e n u w i t h p a s s w o r d DANGER The wrong pCO programming can cause big damages to the unit;...
- Page 68 ELECTRONIC CONTROL INSTRUCTION MANUAL Masks requiring a password Ref. Mask Range Notes When this mask has been reached, to enter the parameters follow the indications of the diagram here below: ...
- Page 69 ELECTRONIC CONTROL INSTRUCTION MANUAL Masks requiring a password Ref. F2 Inside the masks of a loop (see masks “UNIT CONFIGURATION”) it is possible to return to Password Menu (see ), simply pressing once button; Ref. A1 press it twice to return to the main mask ( - see paragraph "10.1 Menu").
- Page 70 ELECTRONIC CONTROL INSTRUCTION MANUAL Masks requiring a password PUMPS Ref. Mask Range Notes ÷ This mask is displayed only if the double pump is enabled and if the Ref. M2 automatic rotation of pumps is enabled ( ÷ ...
- Page 71 ELECTRONIC CONTROL INSTRUCTION MANUAL Masks requiring a password CLOCK Ref. Mask Range Notes ÷ Used to set the date, current day and hour. ÷ Clock ÷ Setting ÷ Time 00:00 Date 00/00/00 ...
- Page 72 ELECTRONIC CONTROL INSTRUCTION MANUAL Masks requiring a password At each alarm tripping pCO automatically stores in some masks the operating conditions (pressure, temperature, status of inlets, etc..). These masks are listed here below. The displaying of some masks depends on unit configuration. ALARMS HISTORY Ref.
- Page 73 ELECTRONIC CONTROL INSTRUCTION MANUAL Masks requiring a password Ref. Mask Range Notes Free-Cooling 3-way-valve and speed regulator staus Freecooling Valve Freecooling Fans Rotation Reg. R: Read only mask W: Read and write mask. SUPERVISOR Ref. Mask Range Notes ÷ This mask allows pCO to be managed by a supervision system. ...
- Page 74 ELECTRONIC CONTROL INSTRUCTION MANUAL Masks requiring a password OTHER SETTINGS Ref. Mask Range Notes ÷ This mask allows to change USER password. Step:1 New User Password 00000 R: Read only mask W: Read and write mask. FREECOOLING AS 201÷751 FC The data in this manual are not binding and may be changed by the manufacturer without notice.
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Page 75: Pressure Switch
ELECTRONIC CONTROL INSTRUCTION MANUAL Alarm management HAPTER L A R M M A N A G E M E N T 1 2 . 1 A l a r m s i g n a l s 1 2 . 1 . 1 A l a r m d i s p l a y i n g During the unit working, some alarm conditions could happen. -
Page 76: Table
ELECTRONIC CONTROL INSTRUCTION MANUAL Alarm management Ref. Mask Reset Controller action Input Notes manual Complete stop of the Pump 1 overload. unit and of the pump >> Alarm << Pump 1 Overload manual Complete stop of the ID10 Pump 2 overload. unit and of the pump >>... -
Page 77: See Chapter
ELECTRONIC CONTROL INSTRUCTION MANUAL Alarm management Ref. Mask Reset Controller action Input Notes AM17 manual Stop of the unit, the The temperature value measured by the probe is pump remains on equal to or lower than the alarm threshold. See Chapter 2 “Pressure and temperature >>... - Page 78 ELECTRONIC CONTROL INSTRUCTION MANUAL Alarm management Ref. Mask Reset Controller action Input Notes AM28 aut. Warning Pump 1 maintenance is required. For further information please consult paragraph "8.1 Operating hours and number of startings of the >> Alarm << pump". Pump 1 Maintenance AM29...
- Page 79 ELECTRONIC CONTROL INSTRUCTION MANUAL Alarm management Ref. Mask Reset Controller action Input Notes AM39 manual Stop of compressor 1 The probe connected to the Driver of the electronic thermostatic valve of circuit 1 measures a too high temperature of the refrigerant fluid suction during >>...
- Page 80 ELECTRONIC CONTROL INSTRUCTION MANUAL History HAPTER I S T O R Y Ref. U1 The electronic control is furnished with a “history” loop, see Chapter 11 “Masks requiring a password“ and . Inside this loop are stored: the last 50 accesses to User, Service and Manufacturer menus with the appropriate date and hour; the last 50 alarms with the appropriate: •...
- Page 81 ELECTRONIC CONTROL INSTRUCTION MANUAL Setting Tables HAPTER E T T I N G A B L E S The following tables show the list of all masks which contain adjustable parameters, important for unit operation. The absence of any mask on the display is not a malfunction. ATTENTION The displaying of some masks depends on the settings of other masks and also on the unit configuration, decided during design phase.
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Page 82: Mask Factory Setting
ELECTRONIC CONTROL INSTRUCTION MANUAL Setting Tables 1 4 . 2 S e t t i n g s w i t h p a s s w o r d ATTENTION Ref. Mask Factory Setting The modifying of parameters with password must be carried out by specialized personnel only, therefore it is necessary to call an Weekly Band authorized service centre. - Page 83 ELECTRONIC CONTROL INSTRUCTION MANUAL Parameters with settings related to the type of unit HAPTER A R A M E T E R S W I T H S E T T I N G S R E L A T E D T O T H E T Y P E O F U N I T In the tables of Chapter 14 “Setting Tables“...
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