Nordmann Engineering AT4 D SPA Display Service Manual Download Page 26 | Manualshive

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4.2

Principle diagram P-regulation

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10

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100

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Example: Setpoint 48°C / P range 4°C / Temperature range 25° - 55°C

Current Temperature in °C

P range

Setpoint

System Demand in %

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24
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Summary of Contents for AT4 D SPA Display

Page 1: ...SERVICE MANUAL Steam generator Nordmann AT4 D 2567909 EN 1 NORDMANN E N G I N E E R I N G...

Page 2: ......

Page 3: ...sensor monitoring function 10 2 10 Resetting the control to factory settings 11 2 10 Setting up countdown function resetting countdown 12 3 Malfunctions 14 3 1 Operating malfunctions 14 4 Control matr...

Page 4: ...s of the operating instructions of the Nordmann AT4 D and that he is familiar with the dangers when working on the unit The present service manual includes the following information Description of the...

Page 5: ...ation 3 seconds Level 3 interval time 6 minutes pulse duration 3 seconds Level 4 interval time 4 minutes pulse duration 4 seconds Level 5 interval time 3 minutes pulse duration 5 seconds Note the frag...

Page 6: ...Factory setting On Options On Inlet valve opens during drain cycle Off Inlet valve remains closed during drain cycle 2 5 Setting GFCI operation Select GFCI in the engineering menu then press the Set...

Page 7: ...up to 2 0 Filling cycle 60 seconds Note With inlet factor 1 the filling cycle takes 30 seconds then the inlet valve is closed and the main contactor is activated in order to check the current rise If...

Page 8: ...the unit goes on error Error 24 This threshold is fixed based on the maximum nominal current if Fixed is selected light blue con tinuous line in the following diagram With the function Float the over...

Page 9: ...sedduringbathingoperation Select Stop Mode in the engineering menu then press the Set key In the upcoming modification dialogue you determine whether the bathing time is automatically controlled via t...

Page 10: ...key In the upcoming display activate the monitoring function On then press the Set key Now determine the desired settings for the temperature sensor monitoring Temp Range Temperature range Factory set...

Page 11: ...s key to reset the control to factory set tings The control is reset to factory settings and restarted Note By pressing the No key the reset procedure can be aborted The control returns to the engi ne...

Page 12: ...n If the unlock code gets lost the CPU board must be replaced or newly programmed Activating the countdown function Select Countdown in the engineering menu then press the Set key Now set the desired...

Page 13: ...t Running Time 720h Esc Set Countdown Unlock Code 1239 ProgramReset Set Running Time 720h Esc Set Countdown Unlock Code void Running Time 720h Esc Set Running Time 720 h 720 h Esc Set ProgrammReset Ar...

Page 14: ...Unit blocked Time delay According to parameter Max Heating Reset Unit Off On E14 Steam bath cabin door open too long Function indicates that the steam bath cabin is open too long during steam bath ope...

Page 15: ...in temperature in the steam bath cabin is too high Procedure In order to detect a manipulation on the temperature sensor the temperature curve of the temperature sensor is monitored during steam bath...

Page 16: ...dicates that the maximum level sensor has triggered Procedure if the water level reaches the maximum level sensor the warning message W21 is triggered The maximum level sensor features a software rela...

Page 17: ...module with activated warning W22 or W23 goes on standby the warn ing message remains existing advantage you can see at any time that a module has problems with the water supply In addition to the no...

Page 18: ...urrent If however the steam demand drops quickly so called correction drainings are carried out with this function in order to achieve the new working point faster The overcurrent is analysed only if...

Page 19: ...fore the fuse is triggered Behaviour on activation Warning Error Display W25A B Excess Current E25A B Excess Current LED display Red lights Fault Remote Error Relay Error History E25A B System Unit is...

Page 20: ...tercounts up to 2 the warning W27 is triggered If the counter has reached the value of 6 the cylinder is drained and the counter is reset to 0 If within 24 hours 4 drainings occurred the error E27 is...

Page 21: ...lay Service Error Relay Error History E28A B System 72 h Timer is started Unit blocked Time delay 2400 4800 Sensor contacts 72 hours warning time Reset User Maintenance Cyl Reset User Maintenance Cyl...

Page 22: ...Fault Remote Error Relay Error History E32A System Steam production 0 Steam production 0 Time delay 60 seconds Reset automatic reset automatic reset E35 Modbus Timeout Function monitoringforcontinuous...

Page 23: ...If still current flows the electrodes are still in the water the draining is repeated max 20 times If no current flows partial draining is terminated If the safety chain is interrupted no partial drai...

Page 24: ...e unit During draining the information W37 is shown in the display Subsequently the cylinder is refilled with water and operation continuous This procedure is repeated every 72 hours of opera tion ste...

Page 25: ...Set up Fan during bathing No one Supply Exhaust Supply and exhaust In bathing operation the supply and exhaust fan are controlled depending on the set temperature steam bath operation or the set humid...

Page 26: ...gram P regulation 0 10 20 30 40 50 60 70 80 90 100 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 Example Setpoint 48 C P range 4 C Temperature range 25 55 C Current Temperature in C P range Setpo...

Page 27: ...alue and switches on if the temperature is 1 C above the setpoint value Note If the supply fan is controlled with the RLS option de pendent on the heating voltage supply fan is running when the heatin...

Page 28: ...on binding and precipitation of lime plays the carbonic acid H2 CO3 contained in the water and the so called lime carbonic acid equilibrium Carbonic acid is a reaction product of carbon dioxide CO2 w...

Page 29: ...ms will appear By the softening process the Calcium and Magnesium ions representing the hardness of the water are replaced by sodium ions Due to the evaporation of the water the content of the sodium...

Page 30: ...Please be aware of the steam loss if forced draining is activated Forced draining delay Force Delay 72h Note the Nordmann AT4 D increases drain cycle automatically if water with high conductivity is...

Page 31: ...F 12864WM 04 LCD RxW 21 22 23 24 25 26 27 28 29 30 A K xCS LCD xRESET LCD RS PERI DATA0 PERI DATA1 PERI DATA2 PERI DATA3 PERI DATA4 PERI DATA5 PERI DATA6 PERI DATA7 3 3V GND 5V 3 3V BACKLIGHT LCD3 Mar...

Page 32: ...D O MAIN CONTACT2 O SC PUMP2 DI BOARD2 REL4 PWR_L1_SW REL3 PWR_L1_SC 24V1_F INLET VALVE DRAIN PUMP X4 N_SW 1 2 3 4 X11 Control Signal JP3 5V_F 24V1_F X10 3 2 1 2 1 Limitting Signal V IN GND IN GND 3 2...

Page 33: ...CE PUMP1 O FAN1 O RESERVE1 DI BOARD2 S3 S2 S1 24V TEMP IN GND SC_LV 24V Safety chain low voltage GND DI EXT BATH DI EXT LIGHT2 DI EXT LIGHT1 GND VCC AI TEMP SENSOR 0 10V 24V1_F O LIGHT1 O LIGHT2 Reser...

Page 34: ...Notes...

Page 35: ...Nordmann Engineering Technical modifications reserved...

Page 36: ...ordmann Engineering AG Lindenhofstrasse 28 CH 4052 Basel Phone 41 61 404 46 50 Fax 41 61 404 46 79 www nordmann engineering com info nordmann engineering com CH94 0002 01 NORDMANN E N G I N E E R I N...

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