HIdRos LHA P2U Series Technical Manual
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HIdRos LHA P2U Series Technical Manual

High efficiency air to water heat pumps
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HIGH EFFICIENCY AIR TO WATER HEAT PUMPS
LHA P2U/P2S
SERIES
TECHNICAL MANUAL
Multiple instructions:
the instructions before
the unit
Rev. E 10-2021

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  • Page 1 HIGH EFFICIENCY AIR TO WATER HEAT PUMPS LHA P2U/P2S SERIES TECHNICAL MANUAL Multiple instructions: the instructions before the unit Rev. E 10-2021...
  • Page 2 LHA P2U/P2S Declaration of conformity MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev. E 10-2021...

  • Page 3: Table Of Contents

    LHA P2U/P2S LHA P2U/P2S INDEX 1. INTRODUCTION ..............................................................................................................................................................................................................................................................................................................................................2. SAFETY ..................................................................................................................................................................................................................................................3.2 Other versions ........................................................................................................................................................................................3.8 C ................................
  • Page 4 LHA P2U/P2S ......................................................................................................................6. USE ....................................................................... 6.2 Stop ....................................6.3 Set points ......................................................................................................6.6 CIRC .......................................................................................................................................................................................................................................................................................................................... 8. DECOMMISSIONING ..................................... 8.1 Disconnect the unit ....................................................................................

  • Page 5: Introduction

    LHA P2U/P2S LHA P2U/P2S 1. INTRODUCTION 1.1 Preliminary information these instructions. 1.2 Aim and content of the manual instructions. 1.3 How to store this manual user. 1.4 Manual Update 1.5 How to use this manual MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev.
  • Page 6 LHA P2U/P2S 1.6 Potential Risks POTENTIAL LOCATION OF METHOD OF INJURY PRECAUTIONS RISK RISK Burns. severe burns. unit enclosure severe burns. unit. severe burns. open. Entire unit Entire unit MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev. E 10-2021...
  • Page 7 LHA P2U/P2S LHA P2U/P2S 1.7 General Description of Symbols Used BANNED WARNING ACTION REQUIRED MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev. E 10-2021...
  • Page 8 LHA P2U/P2S 1.8 Safety symbols used GENERAL RISK ELECTRICAL HAZARD MOVING PARTS HOT SURFACES SHARP SURFACES EARTH CONNECTION READ AND UNDERSTAND THE INSTRUCTIONS RECOVER OR RECYCLE MATERIAL 1.9 Limitations and prohibited use MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev.
  • Page 9 LHA P2U/P2S LHA P2U/P2S Manufacturer: PD322111 +39 049 9731022 123456 Modello Matricola Model Serial number /201 Categoria PED Data di fabbricazione PED Category Manifacture date R410A 2088 Tipo refrigerante Gruppo fluido Refrigerant type Fluid group Carica refrigerante Equivalente valente Refrigerant charge Equivalente Equiva ente...

  • Page 10: Safety

    LHA P2U/P2S 2. SAFETY 2.1 Warning re potentially hazardous toxic substances • • ENVIRONMENTAL PROTECTION : 2.1.3 Persistence and degradation 2.1.4 Effects of discharges 2.1.5 Exposure controls and personal protection 2.1.6 Professional exposure limits R410A 2.2 Refrigerant handling MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev.
  • Page 11 LHA P2U/P2S LHA P2U/P2S 2.3 Prevent inhalation of high vapor concentration 2.4 Procedures to be adopted in the event of accidental release of refrigerant 2.5 Main Toxicological Information Regarding the Type of refrigerant used 2.5.1 Inhalation sphere. 2.5.2 Contact with skin 2.5.3 Contact with eyes 2.5.4 Ingestion 2.6 First Aid Measures...
  • Page 12 LHA P2U/P2S 3. TECHNICAL CHARACTERISTICS 3.1 Unit description 3.1.1 Frame 3.1.2 Refrigerant circuit 3.1.3 Compressors 3.1.4 Source heat exchanger 3.1.5 User heat exchangers protection. 3.1.6 Fans 3.1.7 Microprocessors MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev. E 10-2021...

  • Page 13: Other Versions

    LHA P2U/P2S LHA P2U/P2S 3.1.8 Electric enclosure 3.1.9 Control and protection devices 3.2 Other versions 3.2.1 Version HH 3.2.2 Version RV 3.2.3 SA Version 3.2.4 SE Version 3.2.5 HA Version 3.2.6 HE Version 3.2.7 Version LS 3.2.8 HA/XL HE/XL Super low noise version MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev.
  • Page 14 LHA P2U/P2S 3.2.9 Version P2U 3.2.10 Version P2S 3.3 Accessories description 3.3.1 Condensate discharge drip tray with antifreeze heater (BRCA) 3.3.2 Antifreeze kit (RAEV2, RAEV4) 3.3.3 Rubber vibration dampers (KAVG) 3.3.4 RS485 serial interface card modbus protocol (INSE) 3.3.6 Electronic expansion valve (VTEE) 3.3.7 Electronic soft starter (DSSE) 3.3.8 Remote control panel (PCRL) 3.3.9 Hydraulic circuit antifreeze kit (KP)
  • Page 15 LHA P2U/P2S LHA P2U/P2S 3.3.11 Integrated hydraulic kit 2 pumps + Water tank (A2ZZU) 3.3.12 Hydraulic kit with one pump without tank - user circuit (A1NTU) 3.3.13 Hydraulic kit with two pumps without tank - user circuit (A2NTU) 3.3.14 Cascade control system (SGRS) 3.3.15 Fan speed control (DCCF) This MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English...
  • Page 16 LHA P2U/P2S 3.4 Technical data SA/LS/HH - P2S/P2U SCOP SE/LS/HH - P2S/P2U SCOP R410A R410A R410A R410A R410A R410A R410A R410A R410A 2088 2088 2088 2088 2088 2088 2088 2088 2088 1002 1202 1402 1602 1802 2002 2302 2502 SA/LS/HH - P2S/P2U SCOP 1002 1202...
  • Page 17 LHA P2U/P2S LHA P2U/P2S HA/LS/HH - P2S/P2U SCOP HE/LS/HH - P2S/P2U SCOP R410A R410A R410A R410A R410A R410A R410A R410A R410A 2088 2088 2088 2088 2088 2088 2088 2088 2088 1002 1202 1402 1602 1802 2002 2302 2502 HA/LS/HH - P2S/P2U SCOP 1002 1202...
  • Page 18 LHA P2U/P2S SA/LS/RV - P2S/P2U SCOP SE/LS/RV - P2S/P2U SCOP R410A R410A R410A R410A R410A R410A R410A R410A R410A 2088 2088 2088 2088 2088 2088 2088 2088 2088 1602 1802 2002 2302 2502 SA/LS/RV - P2S/P2U 1002 1202 1402 SCOP 1002 1202 1402...
  • Page 19 LHA P2U/P2S LHA P2U/P2S HA/LS/RV - P2S/P2U SCOP HE/LS/RV - P2S/P2U SCOP R410A R410A R410A R410A R410A R410A R410A R410A R410A 2088 2088 2088 2088 2088 2088 2088 2088 2088 1602 1802 2002 2302 2502 HA/LS/RV - P2S/P2U 1002 1202 1402 SCOP 1002...
  • Page 20 LHA P2U/P2S HA/XL/RV - P2S/P2U SCOP HE/XL/RV - P2S/P2U SCOP R410A R410A R410A R410A R410A R410A R410A R410A R410A 2088 2088 2088 2088 2088 2088 2088 2088 2088 1602 1802 2002 2302 2502 HA/XL/RV - P2S/P2U 1002 1202 1402 SCOP 1002 1202 1402...
  • Page 21 LHA P2U/P2S LHA P2U/P2S 3.5 Operation limits (SA/SE versions) (HA/HE versions) (RV versions Only) - 20 - 10 3.6.2 User hot water temperature (Winter operation) 3.6.3 Cold water temperature (RV versions Only) 3.6.4 Ambient air temperature MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev.
  • Page 22 LHA P2U/P2S MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev. E 10-2021...
  • Page 23 LHA P2U/P2S LHA P2U/P2S 3.6 Domestic hot water production 3.6.1 Solution 1 MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev. E 10-2021...
  • Page 24 LHA P2U/P2S 3.6.2 Solution 2 This is the solution for existing buildings or for those applications where it is not possible to remove existing plants. possibility of using the existing DHW tank. COLD WATER in the tank. AS MUCH AS POSSIBLE MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev.
  • Page 25 LHA P2U/P2S LHA P2U/P2S 3.7 Compressor capacity steps NUMBER OF COMPRESSORS Modello … … … … … … … … … … … … … … … … … … … … … … 1002 … … 1202 … … 1402 …...
  • Page 26 LHA P2U/P2S 3.8 Correction tables 3.8.1 Operation with glycol Glycol percentage Freezing point (°C) IPCF WFCF PDCF -3.2 0.985 1.02 1.08 -7.8 0.98 0.99 1.05 1.12 -14.1 0.97 0.98 1.09 1.22 -22.3 0.965 0.97 1.14 1.25 -33.8 0.955 0.965 1.33 CCF: Capacity correction factor IPCF: Input power correction factor Water temperature diff.(°C)
  • Page 27 LHA P2U/P2S LHA P2U/P2S 3.9 Sound data SA / LS Octave bands (Hz) Mod. dB(A) dB(A) SE / LS MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev. E 10-2021...
  • Page 28 LHA P2U/P2S HA / LS Octave bands (Hz) Mod. dB(A) dB(A) HE / LS MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev. E 10-2021...
  • Page 29 LHA P2U/P2S LHA P2U/P2S HA / XL Octave bands (Hz) Mod. dB(A) dB(A) HE/ XL MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev. E 10-2021...
  • Page 30 LHA P2U/P2S 4. INSTALLATION 4.1 General safety guidelines and and use of symbols tion. 4.2 Health and safety Considerations 4.3 Personal protective equipment MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev. E 10-2021...

  • Page 31: Inspection

    LHA P2U/P2S LHA P2U/P2S 4.4 Inspection In Case of Damage 4.5 Storage 4.5.1 Shipment 4.6 Unpacking 4.7 Lifting and handling MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev. E 10-2021...
  • Page 32 LHA P2U/P2S 4.8 Location and minimum technical clearances SA/SE 252 - 302 - 402 SA/SE 432 - 492 - 592 SA/SE 702 - 802 - 902 HA/HE 252 - 302 HA/HE 412 - 432 - 492 HA/HE 602 - 702 - 802 - 902 - 1002 - 1202 A (mm) SA-SE/LS 1500...
  • Page 33 LHA P2U/P2S LHA P2U/P2S SA/SE 1002 - 1202 - 1402 - 1602 SA/SE 1802 - 2002 SA/SE 2302 - 2502 HA/HE 1402 - 1602 - 1802 - 2002 HA/HE 2302 - 2502 1002 1202 1402 1602 1802 2002 2302 2502 A (mm) SA-SE/LS 1880...
  • Page 34 LHA P2U/P2S 4.9 Installation of rubber vibration dampers (KAVG) sez A - A ØM ØD ØE Mod. 252÷402 412÷592 602÷2502 4.10 Serial interface card RS485 (INSE) Supervision MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev. E 10-2021...
  • Page 35 LHA P2U/P2S LHA P2U/P2S 4.11 Installation of condensate drip tray (BRCA) 4.11.1 Installation of the heating cable MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev. E 10-2021...
  • Page 36 LHA P2U/P2S 4.12 Hydraulic connections • • • • • • Heating mode: Cooling mode: 4.13 Chemical characteristics of the water Total Hardness Electric conductibility Sulphur ion None Chlorine ions Ammonia ion None Sulphuric acid ions Silicon ion Total Iron MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev.
  • Page 37 LHA P2U/P2S LHA P2U/P2S 4.14 Hydraulic components 4.14.1 Standard Versions User Circuit 4.14.2 A1ZZU - A2ZZU User Circuit 4.14.3 A1NTU - A2NTU User Circuit MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev. E 10-2021...
  • Page 38 LHA P2U/P2S 4.15 User circuit minimum water content Model Minimum water content winter mode (l) Model 1002 1202 1402 1602 1802 2002 2302 2502 Minimum water content winter mode (l) 1000 1120 1240 1440 1600 1800 1920 2000 2200 4.16 Minimum domestic hot water circuit content Model Minimum water content hydraulic circuit (l) Model...
  • Page 39 LHA P2U/P2S LHA P2U/P2S 4.19 Typical installations 4.19.1 Combined heating / Cooling / Domestic hot water production – 2 pipe system P2S User circuit sensor The plant components supplied by the company are: STANDARD OPTIONS NOT AVAILABLE User circuit sensor MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev.
  • Page 40 LHA P2U/P2S 4.20 Electric connections: preliminary safety information FROST PROTECTION MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev. E 10-2021...
  • Page 41 LHA P2U/P2S LHA P2U/P2S 4.21 Electric data Model Power supply Control board Auxiliary circuit Fans power supply Line section PE section Model 1002 1202 1402 1602 1802 2002 2302 2502 Power supply Control board Auxiliary circuit Fans power supply Line section PE section present in the units.
  • Page 42 LHA P2U/P2S 4.22.2 Remote wiring connections (compulsory) USER CIRCUIT WATER INLET SENSOR (BTI) USER CIRCUIT WATER PUMP use. DOMESTIC HOT WATER SENSOR (BTS) DOMESTIC HOT WATER CIRCUIT PUMP MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev. E 10-2021...
  • Page 43 LHA P2U/P2S LHA P2U/P2S 4.22.3 Remote wiring connections (optional) 3 WAY ON/OFF VALVE REMOTE ON / OFF REMOTE SUMMER / WINTER CHANGE OVER REMOTE GENERAL ALARM 90-91-92. USER CIRCUIT ELECTRIC INTEGRATION HEATERS DOMESTIC HOT WATER ELECTRIC INTEGRATION HEATERS MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev.
  • Page 44 LHA P2U/P2S PRIORITY SELECTOR (Hot water) (only for 252÷2502) HEATING CABLE WEATHER COMPENSATED SENSOR (BTE) DOMESTIC HOT WATER OUTLET SENSOR (BTU) USER CIRCUIT FLOW SWITCH (SFW1) MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev. E 10-2021...
  • Page 45 LHA P2U/P2S LHA P2U/P2S 4.23 Positioning of the user circuit water inlet sensor (BTI) Correct positioning of the BTI sensor Incorrect positioning of the BTI sensor 4.24 Positioning of the domestic hot water circuit sensor (BTS) Correct positioning of the BTS sensor Incorrect positioning of the BTS sensor MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev.
  • Page 46 LHA P2U/P2S 4.25 Refrigerant circuit layout P2U Version P2S Version EXV 2 EXV 3 EXV 1 MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev. E 10-2021...
  • Page 47 LHA P2U/P2S LHA P2U/P2S P2U Version P2S Version EXV 2 EXV 3 EXV 1 MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev. E 10-2021...

  • Page 48: Unit Start Up

    LHA P2U/P2S 5. UNIT START UP 5.1 Preliminary checks 5.1.1 Before start-up • • • • • • • • • • • • • MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev. E 10-2021...
  • Page 49 LHA P2U/P2S LHA P2U/P2S 5.1.2 Device Set-point Differential Reset Device Set-point Differential Reset ----- ----- ----- support. 5.1.3 Controls during unit operation • • • MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev. E 10-2021...
  • Page 50 LHA P2U/P2S 5.2 Position of the control panel 5.3 Description of the control panel Unit ON: Heating Unit ON: Heating 00:00 01/01/2014 °C 30.0 Evaporator inlet temperature 35.0 °C Evaporator outlet temperature °C External air temp. (FC) San. water temperature 50.0 °C PROBES...
  • Page 51 LHA P2U/P2S LHA P2U/P2S 5.3.2 Key function PROBES ALARM SERVICE CIRC Stand-by Stand-by 00:00 01/01/2014 Evaporator inlet temperature 30.0 °C Evaporator outlet temperature °C 35.0 External air temp. (FC) °C San. water temperature 50.0 °C PROBES ALARM SERVICE CIRC. 5.4 To remote the control 5.4.1 Remote keyboard connection (VGI890) ENTER Rosso / Red...
  • Page 52 LHA P2U/P2S 5.4.2 Panel mounting connection diagram 5.4.3 Wall mounting connection diagram 5.4.4 Selection built in display or remote keyboard ENTER ENTER Remoto MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev. E 10-2021...

  • Page 53: Use

    LHA P2U/P2S LHA P2U/P2S 6. USE 6.1 Switch the unit on Unit 6.1.1 Switch the unit on from the keyboard Cooling mode Heating mode Domestic hot water mode MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev. E 10-2021...

  • Page 54: Stop

    LHA P2U/P2S 6.1.2 Heating and cooling mode Unit ON: Heating Unit ON: Heating Unit ON: Cooling Unit ON: Cooling 00:00 01/01/2014 00:00 01/01/2014 Evaporator inlet temperature 28.4 °C Evaporator inlet temperature 20.2 °C Evaporator outlet temperature °C Evaporator outlet temperature °C 27.0 63.6...

  • Page 55: Set Points

    LHA P2U/P2S LHA P2U/P2S 6.3 Set point Set point Set point Stand-by Stand-by 00:00 01/01/2014 Energy saving Evaporator inlet temperature 30.0 °C Dynamic set Heating 35.0 °C Evaporator outlet temperature 35.0 °C Sanitary water 50.0 °C External air temp. (FC) °C San.
  • Page 56 LHA P2U/P2S 6.4 PROBES key PROBES Stand-by Stand-by 00:00 01/01/2014 Evaporator inlet temperature 30.0 °C Evaporator outlet temperature 35.0 °C External air temp. (FC) °C San. water temperature 50.0 °C PROBES ALARM SERVICE CIRC. Probes visualization Probes visualization Probes visualization Probes visualization Evaporator inlet temperature San.

  • Page 57: Circ

    LHA P2U/P2S LHA P2U/P2S • Reset: RESET • Password • Active RST ALL 6.6 CIRC key CIRC ENTER State of the compressors Color black: Color white: level of step control. Unit ON: Heating Unit ON: Heating 00:00 01/01/2014 Evaporator inlet temperature 28.4 °C Evaporator outlet temperature...
  • Page 58 LHA P2U/P2S Unloading status Unloading status Compressor status Compressor status Circuit 1 Circuit 1 Circuit 1 Circuit 1 unloading not ongoing 51 % Circuit 2 Circuit 2 Circuit 2 Circuit 2 ALARM EXIT ALARM EXIT Evaporating-condensing probe Evaporating-condensing probe Evaporator pump status Evaporator pump status Evap.
  • Page 59 LHA P2U/P2S LHA P2U/P2S 6.7 SERVICE key ENTER EXIT ENTER EXIT Press the SERVICE Press ENTER Press the EXIT MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev. E 10-2021...
  • Page 60 LHA P2U/P2S 6.7.1 Service parameters setting 1st level password (Pr1) 1st level password (Pr1) ALARM EXIT 1st level password (Pr1) 1st level password (Pr1) Password OK! Press ENTER to continue ALARM ENTER EXIT Code Meaning Code Meaning Set point Defrost MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev.
  • Page 61 LHA P2U/P2S LHA P2U/P2S press Parameter group selection Parameter group selection St01 10.0 °C St02 °C 15.0 °C St03 St04 40.0 °C Set point Set point Summer set point Summer set point ALARM ENTER EXIT ALARM EXIT Parameter group selection Parameter group selection Sd01 °C...
  • Page 62 LHA P2U/P2S Weather compensated function MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev. E 10-2021...
  • Page 63 LHA P2U/P2S LHA P2U/P2S Parameter group selection Parameter group selection FS02 FS03 45.0 °C FS04 °C Sanitary circuit Sanitary circuit Sanitary water priority Sanitary water priority ALARM ENTER EXIT ALARM EXIT 6.7.2 Time bands setting ES01 ES17 ES02 ES18 ES03 ES19 ES04 ES20...
  • Page 64 LHA P2U/P2S Operating modes • Automatic ON-OFF: • Energy Saving: Parameter group selection Parameter group selection ES01 ES01 18:00 18:00 Time band n°1 Time band n°1 ES02 ES02 00:00 00:00 Time band n°2 Time band n°2 ES03 ES03 05:00 05:00 Time band n°3 Time band n°3 Energy Saving...
  • Page 65 LHA P2U/P2S LHA P2U/P2S 6.7.3 Setting date and time Clock setting Clock setting : 07 Energy saving Energy saving Disabled Disabled Data setting Data setting 05 / 7 / 14 ON/OFF scheduling ON/OFF scheduling Disabled Disabled Dat of the week Dat of the week Tuesday Tuesday...
  • Page 66 LHA P2U/P2S 6.7.4 Compressor maintenance Circuit Circuit Compressor mainteinance Compressor mainteinance Status Hour Start-up Reset Comp 1 Comp 1 Comp 1 abilitato enabled Circuit 1 Circuit 2 ALARM ENTER EXIT ALARM ENB/DIS EXIT 6.7.5 Water pumps Water pumps Water pumps Hour Reset Reset...
  • Page 67 LHA P2U/P2S LHA P2U/P2S 6.7.7 Alarms Alarms Alarms b1HP b1HP Attivo Aktiv Clock alarm RST ALL RESET EXIT 6.7.8 Alarm log Alarm log Alarm log b1HP b1HP High pressure circuit 1 b1AC b1AC Antifreeze circuit 1 in summer mode ALARM RST ALL EXIT 6.7.9 Defrost...
  • Page 68 LHA P2U/P2S Press Defrost circ. 1: Defrost circ. 1: cycle not in progress Defrost circ. 1: Defrost circ. 1: cycle not in progress Condenser 1 probe Condenser 1 probe Defrost end set Defrost end set 36.2 bar 36.2 bar Evaporator 1 probe Evaporator 1 probe Combined defrost probe Combined defrost probe...
  • Page 69 LHA P2U/P2S LHA P2U/P2S 6.7.12 Screw compressor (If available) Screw compressors Screw compressors Screw compressors circ. 1 Screw compressors circ. 1 Discharge temperature Discharge temperature 86.0 °C Disch.temp.alarm Disch.temp.alarm 100.0 °C 10.0 °C Liquid injection valve Liquid injection valve Liquid inject. set Liquid inject.
  • Page 70 LHA P2U/P2S 6.7.14 Sanitary water Sanitary water: Sanitary water: Antilegionella cycle: disabled Antilegionella cycle: disabled Sanitary water temp. Sanitary water temp. 44.9 °C 45.3 °C Sanitary water Set point Antilegionella set point 50.0 °C 60.0 °C Real san. water set point 50.0 °C ALARM EXIT...
  • Page 71 LHA P2U/P2S LHA P2U/P2S 6.8 Acoustic signal silencing 6.9 Emergency Stop 6.9.1 Start after an emergency stop MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev. E 10-2021...
  • Page 72 LHA P2U/P2S 7. MAINTENANCE OF THE UNIT 7.1 General warnings • • • 7.2 Drive access MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev. E 10-2021...
  • Page 73 LHA P2U/P2S LHA P2U/P2S 7.3 Scheduled maintenance Search for leaks CASE Visual Inspection Pressure Test 7.4 Periodical checks and start up MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev. E 10-2021...
  • Page 74 LHA P2U/P2S 7.4.1 Electrical system and adjustment Frequency Action to be performed As neces- 7.4.2 Condensing coils and fans Frequency Action to be performed As neces- present every three months or more MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev.
  • Page 75 LHA P2U/P2S LHA P2U/P2S 7.4.3 Compressors Frequency Action to be performed As neces- service. MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev. E 10-2021...

  • Page 76: Decommissioning

    LHA P2U/P2S 7.5 Refrigerant circuit repair Therefore: • • • • • • 8. DECOMMISSIONING 8.1 Disconnect the unit • • • • • 8.2 Disposal, recovery and recycling MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev. E 10-2021...
  • Page 77 LHA P2U/P2S LHA P2U/P2S 8.3 RAEE Directive (only UE) 9. DIAGNOSIS AND TROUBLESHOOTING Code Alarm Description Cause Solution ACF1 ACF2 ACF3 ACF4 ACF5 ACF6 ACF7 ACF8 ACF9 AEFL AEUn AHFL MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev. E 10-2021...
  • Page 78 LHA P2U/P2S Code Alarm Description Cause Solution sensor AP10 sensor sensor sensor. sensor sensor. AtE1 AtE2 Restore the correct user circuit B1 HP b1AC b1AH b1dF b1hP circuit 1 B1LP b1lP circuit 1 MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev.
  • Page 79 LHA P2U/P2S LHA P2U/P2S b1tF C1tr C2tr MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English Rev. E 10-2021...

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