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HIdRos LHi P2U Series Technical Manual

High efficiency air to water heat pumps with dc inverter compressor
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HIGH EFFICIENCY AIR TO WATER HEAT PUMPS
WITH DC INVERTER COMPRESSOR
LHi P2U/P2S/P4U/P4S
SERIES
TECHNICAL MANUAL
Multiple instructions:
the instructions before
the unit
Rev. C 05-2021

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Summary of Contents for HIdRos LHi P2U Series

  • Page 1 HIGH EFFICIENCY AIR TO WATER HEAT PUMPS WITH DC INVERTER COMPRESSOR LHi P2U/P2S/P4U/P4S SERIES TECHNICAL MANUAL Multiple instructions: the instructions before the unit Rev. C 05-2021...
  • Page 2 LHi P2U/P2S/P4U/P4S Declaration of conformity MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...

  • Page 3: Table Of Contents

    LHi P2U/P2S/P4U/P4S INDEX 1. INTRODUCTION ..............................................................................................................................................................................................................................................................................................................................................2. SAFETY ..................................................................................................................................................................................................................................................3.2 Other versions ............................................................................................................................................................................................................3.9 C ..................................................................
  • Page 4 LHi P2U/P2S/P4U/P4S ....................................................................................................................6. USE ........................................................................6.2 Stop .................................................................................................................................... 6.6 CIRC ................................................................................................................................7. UNIT MAINTENANCE .................................................................... 7.2 Access to the unit ........................................................................................................................8. DECOMMISSIONING ...........................................................................................

  • Page 5: Introduction

    LHi P2U/P2S/P4U/P4S 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.7100.GB-C-1 Operation and maintenance manual LHi series English Rev.
  • Page 6 LHi P2U/P2S/P4U/P4S 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.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...
  • Page 7 LHi P2U/P2S/P4U/P4S 1.7 General Description of Symbols Used BANNED WARNING ACTION REQUIRED MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...
  • Page 8 LHi P2U/P2S/P4U/P4S 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.7100.GB-C-1 Operation and maintenance manual LHi series English Rev.
  • Page 9 LHi P2U/P2S/P4U/P4S 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 400V-3ph-50Hz...

  • Page 10: Safety

    LHi P2U/P2S/P4U/P4S 2. SAFETY 2.1 Warning re potentially hazardous toxic substances • • ENVIRONMENTAL PROTECTION : 2.1.3 Persistence and degradation 2000. 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.7100.GB-C-1 Operation and maintenance manual LHi series English Rev.
  • Page 11 LHi P2U/P2S/P4U/P4S 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 2.6.1 Inhalation...
  • Page 12 LHi P2U/P2S/P4U/P4S 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 (P4U/P4S versions) protection. MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...

  • Page 13: Other Versions

    LHi P2U/P2S/P4U/P4S 3.1.7 Electric enclosure 3.1.8 Microprocessors 3.1.9 Control and protection devices 3.1.11 Electronic expansion valve (VTEE) 3.2 Other versions 3.2.1 Version HH 3.2.2 Version RV 3.2.6 SE Version 3.2.7 Version LS 3.2.8 XL Super low noise version MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev.
  • Page 14 LHi P2U/P2S/P4U/P4S 3.2.9 P2U Version 3.2.10 P2S Version 3.2.8 P4U version 1. User water heating: 2. User water cooling: 3. Simultaneous user Cooling + heating: P4U version 7°C 7°C 12°C 12°C 35°C 35°C 30°C 30°C MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev.
  • Page 15 LHi P2U/P2S/P4U/P4S 3.2.9 P4S Version 1. User water heating: 2. User water cooling: 3. Domestic hot water production (D.H.W.): 4. User water cooling + D.H.W. production: 55°C 55°C 50°C 50°C 35°C 7°C 7°C 30°C 12°C 12°C 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)
  • Page 16 LHi P2U/P2S/P4U/P4S 3.3.5 Electronic soft starter (DSSE) 3.3.6 Remote control panel (PCRL) 3.3.7 Hydraulic circuit antifreeze kit (KP) 3.3.8 Integrated hydraulic kit 1 pump + Water tank (A1ZZU) 3.3.9 Integrated hydraulic kit 2 pumps + Water tank (A2ZZU) 3.3.10 Hydraulic kit with one pump without tank - user circuit (A1NTU) 3.3.11 Hydraulic kit with one pump without tank - recovery circuit (A1NTR) 3.3.12 Hydraulic kit with two pumps without tank - user circuit (A2NTU) 3.3.13 Hydraulic kit with two pumps without tank - recovery circuit (A2NTR)
  • Page 17 LHi P2U/P2S/P4U/P4S 3.3.15 Accessories availability LHi SE/HH-RV 1052 1222 BRCA DSSE INSE RICO RICSS GBPE RDCO A1NTU A2NTU A1ZZU A2ZZU BUF4A A1NTR A2NTR MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...
  • Page 18 LHi P2U/P2S/P4U/P4S LHi SE/HH-RV 1534 1654 1854 1964 2254 2554 – – – – – – BRCA DSSE INSE RICO RICSS GBPE RDCO A1NTU A2NTU A1ZZU A2ZZU BUF4A A1NTR A2NTR MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...
  • Page 19 LHi P2U/P2S/P4U/P4S 3.4 Technical data 1052 1222 1534 1654 1854 1964 2254 2554 SE/LS/HH - P2S/P2U SCOP R410A R410A R410A R410A R410A R410A R410A R410A R410A R410A R410A R410A R410A 2088 2088 2088 2088 2088 2088 2088 2088 2088 2088 2088 2088 2088...
  • Page 20 LHi P2U/P2S/P4U/P4S 1052 1222 1534 1654 1854 1964 2254 2554 SE/LS/RV - P2S/P2U SCOP R410A R410A R410A R410A R410A R410A R410A R410A R410A R410A R410A R410A R410A 2088 2088 2088 2088 2088 2088 2088 2088 2088 2088 2088 2088 2088 1052 1222 1534...
  • Page 21 LHi P2U/P2S/P4U/P4S 1052 1222 1534 1654 1854 1964 2254 2554 SE/LS/RV - P4U SCOP R410A R410A R410A R410A R410A R410A R410A R410A R410A R410A R410A R410A R410A 2088 2088 2088 2088 2088 2088 2088 2088 2088 2088 2088 2088 2088 1052 1222 1534...
  • Page 22 LHi P2U/P2S/P4U/P4S 1052 1222 1534 1654 1854 1964 2254 2554 SE/XL/RV - P4S SCOP R410A R410A R410A R410A R410A R410A R410A R410A R410A R410A R410A R410A R410A 2088 2088 2088 2088 2088 2088 2088 2088 2088 2088 2088 2088 2088 1052 1222 1534...
  • Page 23 LHi P2U/P2S/P4U/P4S 3.5 Operation limits (SE versions) (RV versions Only) - 20 - 10 3.5.2 User hot water temperature (Winter operation) the unit. 3.5.3 Cold water temperature (RV versions Only) 3.5.4 Ambient air temperature MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev.
  • Page 24 LHi P2U/P2S/P4U/P4S MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...
  • Page 25 LHi P2U/P2S/P4U/P4S 3.6 Domestic hot water production (P2S Versions) 3.6.1 Solution 1 MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...
  • Page 26 LHi P2U/P2S/P4U/P4S 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.7100.GB-C-1 Operation and maintenance manual LHi series English Rev.
  • Page 27 LHi P2U/P2S/P4U/P4S 3.7 Domestic hot water production (only for P4S version) 3.7.1 Solution MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...
  • Page 28 LHi P2U/P2S/P4U/P4S 3.8 Compressor capacity steps 3.9 Correction tables 3.9.1 Operation with glycol -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) CCCP...
  • Page 29 LHi P2U/P2S/P4U/P4S 3.10 Sound data LHi / SE / LS Octave bands (Hz) Mod. dB(A) dB(A) LHi / SE / XL MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...
  • Page 30 LHi P2U/P2S/P4U/P4S 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.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...

  • Page 31: Inspection

    LHi P2U/P2S/P4U/P4S 4.4 Inspection In Case of Damage 4.5 Storage 4.5.1 Shipment 4.6 Unpacking 4.7 Lifting and handling MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...
  • Page 32 LHi P2U/P2S/P4U/P4S 4.8 Location and minimum technical clearances SE/LS 532 SE/LS 632 - 742 SE/LS 862 - 912 - 1052 - 1222 SE/XL 532 SE/XL 632 SE/XL 742 - 862 - 912 - 1052 - 1222 1052 1222 A (mm) SE/LS 1690 1840...
  • Page 33 LHi P2U/P2S/P4U/P4S SE/LS 1534 SE/XL 1534 SE/LS 1654 - 1854 - 1964 SE/LS 2504 - 3004 SE/XL 1654 - 1854 - 1964 SE/XL 2504 - 3004 1534 1654 1854 1964 2504 3004 A (mm) SE/LS 1890 1890 1890 1890 2350 2350 B (mm) SE/LS...
  • Page 34 LHi P2U/P2S/P4U/P4S 4.9 Installation of rubber vibration dampers (KAVG) sez A - A ØM ØD ØE Mod. 532÷1222 1534÷2554 4.10 Serial interface card RS485 (INSE) Supervision MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...
  • Page 35 LHi P2U/P2S/P4U/P4S 4.11 Installation of condensate drip tray (BRCA) 4.11.1 Installation of the heating cable MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...
  • Page 36 LHi P2U/P2S/P4U/P4S 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.7100.GB-C-1 Operation and maintenance manual LHi series English Rev.
  • Page 37 LHi P2U/P2S/P4U/P4S 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.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...
  • Page 38 LHi P2U/P2S/P4U/P4S 4.14.4 P4S Versions P4U Versions 4.14.5 P4S Versions + A2NTR + A2ZZU P4U Versions + A2NTR + A2ZZU 4.14.6 P4S Versions + A2NTR + A2NTU P4U Versions + A2NTR + A2NTU MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev.
  • Page 39 LHi P2U/P2S/P4U/P4S 4.15 User circuit minimum water content Model 1052 1222 Minimum water content winter mode (l) 1025 1180 Model 1534 1654 1854 1964 2254 2554 Minimum water content winter mode (l) 1120 1350 4.16 Minimum domestic hot water circuit content 1052 1222 Model...
  • Page 40 LHi P2U/P2S/P4U/P4S 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.7100.GB-C-1 Operation and maintenance manual LHi series English Rev.
  • Page 41 LHi P2U/P2S/P4U/P4S 4.19.1 Combined heating / Cooling / Domestic hot water production – 4 pipe system P4S User circuit sensor The plant components supplied by the company are: STANDARD OPTIONS NOT AVAILABLE User circuit sensor MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev.
  • Page 42 LHi P2U/P2S/P4U/P4S 4.19.2 Combined heating / Cooling production – 4 pipe system P4U The system components are provided : STANDARD OPTIONS NOT AVAILABLE MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...
  • Page 43 LHi P2U/P2S/P4U/P4S 4.20 Electric connections: preliminary safety information FROST PROTECTION MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...
  • Page 44 LHi P2U/P2S/P4U/P4S 4.21 Electric data 1052 1222 Model Power supply Control board Auxiliary circuit Fans power supply Line section PE section Model 1534 1654 1854 1964 2254 2554 Power supply Control board Auxiliary circuit Fans power supply Line section PE section present in the units.
  • Page 45 LHi P2U/P2S/P4U/P4S 4.22 Electric connections 4.22.1 Power supply and electrical connections 4.22.2 Remote wiring connections (compulsory) USER CIRCUIT WATER INLET SENSOR (BTI) USER CIRCUIT WATER PUMP DOMESTIC HOT WATER SENSOR (BTS) MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...
  • Page 46 LHi P2U/P2S/P4U/P4S DOMESTIC HOT WATER CIRCUIT PUMP 4.22.3 Remote wiring connections (optional) 3 WAY ON/OFF VALVE(Only required on 2 pipes systems versions); Not required on /P4 versions) REMOTE ON / OFF REMOTE SUMMER / WINTER CHANGE OVER REMOTE GENERAL ALARM 90-91-92.
  • Page 47 LHi P2U/P2S/P4U/P4S INTEGRATIVE HEATING ELEMENTS DOMESTIC HOT WATER CIRCUIT (98-2N1) MOD. 532 - 1252 (15-2N1) MOD. 1534 - 2554 PRIORITY SELECTOR (Hot water) (Only P2S, P2U) WEATHER COMPENSATED SENSOR (BTE) USER CIRCUIT WATER OUTLET SENSOR (BTO) DOMESTIC HOT WATER OUTLET SENSOR (BTU) USER CIRCUIT FLOW SWITCH (SFW1) MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev.
  • Page 48 LHi P2U/P2S/P4U/P4S 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.7100.GB-C-1 Operation and maintenance manual LHi series English Rev.
  • Page 49 LHi P2U/P2S/P4U/P4S 4.25 Refrigerant circuit layout P2U Version P2S Version EXV 2 EXV 1 MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...
  • Page 50 LHi P2U/P2S/P4U/P4S P2U Version P2S Version EXV 2 EXV 3 MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...
  • Page 51 LHi P2U/P2S/P4U/P4S P4S Version EXV 2 EXV 1 MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...
  • Page 52 LHi P2U/P2S/P4U/P4S P4U Version YDEF YTUT1 YTUT BTI VR YTSO YDEF1 YDEF YDEF1 YTSO YTUT connections MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...
  • Page 53 LHi P2U/P2S/P4U/P4S P4S Version EXV 2 EXV 3 EXV 1 MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...
  • Page 54 LHi P2U/P2S/P4U/P4S P4U Version YDEF YTUT1 YTUT BTI VR YTSO YDEF1 YDEF YDEF1 YTSO YTUT MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...

  • Page 55: Unit Start Up

    LHi P2U/P2S/P4U/P4S 5. UNIT START UP 5.1 Preliminary checks 5.1.1 Before start-up • • • • • • • • • • • • • MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...
  • Page 56 LHi P2U/P2S/P4U/P4S 5.1.2 Device Set-point Differential Reset Device Set-point Differential Reset ----- ----- ----- support. 5.1.3 Controls during unit operation • • • MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...
  • Page 57 LHi P2U/P2S/P4U/P4S 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 30.0 °C Evaporator inlet temperature °C Evaporator outlet temperature 35.0 External air temp. (FC) °C San. water temperature 50.0 °C PROBES...
  • Page 58 LHi P2U/P2S/P4U/P4S 5.3.2 Key function PROBES ALARM SERVICE CIRC Stand-by Stand-by 00:00 01/01/2014 30.0 °C Evaporator inlet temperature 35.0 °C Evaporator outlet temperature °C External air temp. (FC) San. water temperature 50.0 °C PROBES ALARM SERVICE CIRC. MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev.
  • Page 59 LHi P2U/P2S/P4U/P4S 5.4 Remote display connection diagram ENTER ENTER • • 5.4.1 Wall mounting connection diagram MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...

  • Page 60: Use

    LHi P2U/P2S/P4U/P4S 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.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...

  • Page 61: Stop

    LHi P2U/P2S/P4U/P4S 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 Evaporator inlet temperature 28.4 °C 20.2 °C Evaporator outlet temperature Evaporator outlet temperature 27.0 °C 63.6 °C...
  • Page 62 LHi P2U/P2S/P4U/P4S 6.3 Set point Set point Set point Stand-by Stand-by 00:00 01/01/2014 Energy saving 30.0 °C Evaporator inlet temperature Dynamic set 35.0 °C Heating 35.0 °C Evaporator outlet temperature 50.0 °C Sanitary water °C 35.0 °C External air temp. (FC) 50.0 °C San.
  • Page 63 LHi P2U/P2S/P4U/P4S 6.4 PROBES key Probes visualization Probes visualization Stand-by Stand-by 00:00 01/01/2014 Evaporator inlet temperature 58.8 °C Evaporator inlet temperature 28.4 °C Evaporator outlet temperature °C 25.7 °C Evaporator outlet temperature 27.0 San. water temperature °C External air temp. (FC) °C 47.6 31.8...

  • Page 64: Circ

    LHi P2U/P2S/P4U/P4S • Reset: • Password • Active 6.6 CIRC key CIRC 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 27.0 °C External air temp.
  • Page 65 LHi P2U/P2S/P4U/P4S Evaporator pump status Evaporator pump status Fan speed regulation Fan speed regulation Evap. pump 1 Evap. pump 1 Cond.Fan1: Cond.Fan1: 100% 100% ALARM ALARM 6.7 SERVICE key Service Service Unit ON: Heating Unit ON: Heating 00:00 01/01/2014 1st Level Pass 28.4 °C Evaporator inlet temperature...
  • Page 66 LHi P2U/P2S/P4U/P4S ALARM ENTER ALARM ENTER MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...
  • Page 67 LHi P2U/P2S/P4U/P4S 6.7.1 Service parameters setting Code Meaning Code Meaning Parameter programming Parameter programming St: Set-point St: Set-point 1st level 1st level Chiller set point ALARM ENTER ALARM SP: Setup SP: Setup Parameter programming Parameter programming 1st level 1st level SP14 Serial address Serial address...
  • Page 68 LHi P2U/P2S/P4U/P4S Sd: Dynamic set point Sd: Dynamic set point Parameter programming Parameter programming °C Sd01 1st level 1st level Sd02 10.0 °C Sd03 °C Sd04 20.0 °C Max increase in chiller dynamic set ALARM ALARM ENTER Press T4 Weather compensated function MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev.
  • Page 69 LHi P2U/P2S/P4U/P4S Parameter programming Parameter programming ES: Energy saving ES: Energy saving 1st level 1st level 00:00 00:00 00:00 00:00 Start of work time band 1 ALARM ENTER ALARM Parameter programming Parameter programming FS02 1st level 1st level FS03 45.0 °C FS04 °C...
  • Page 70 LHi P2U/P2S/P4U/P4S 6.7.2 Setting date and time Press T4 T5 to set the Start Start Stop Stop : 07 Clock setting Clock setting 00:00 00:00 00:00 00:00 Time band n°1 Time band n°1 05 / 7 / 14 Data setting Data setting 00:00 00:00...
  • Page 71 LHi P2U/P2S/P4U/P4S 6.7.4 Water pumps Water pumps Water pumps Hour Evaporator water pump RESET ENB/DIS HOURS 6.7.5 Alarms Alarms Alarms Active Clock alarm ESC RST ALL RESET 6.7.6 Alarm log Alarm log Alarm log 2/10 b1HP b1HP High pressure circuit 1 10:12 13/09/2016 b1AC...
  • Page 72 LHi P2U/P2S/P4U/P4S 6.7.7 Defrost Defrost status Defrost status Circuit 1 Circuit 1 cycle not in progress cycle not in progress 45 : 0 Time to start (mm:ss) ALARM ENTER Press Defrost circ. 1: Defrost circ. 1: cycle not in progress Defrost circ.
  • Page 73 LHi P2U/P2S/P4U/P4S 6.7.9 I/O Status (Input/Output) I/O Status I/O Status Analog input Analog output Digital input Digital output ALARM ENTER 6.7.10 Auxiliary output Auxiliary output status Auxiliary output status 51.3 °C External air temp.: 17.6 °C San.water sec. t.: ALARM 6.7.11 Sanitary water .
  • Page 74 LHi P2U/P2S/P4U/P4S 6.9 Inverter management U n ità IN : C h ille r 08:18 08/07/2020 10.9 °C T. IN Evap: 32.9 °C T. OUT Evap: 43.8 °C T. Regol.Acqua San.: 27.4 °C T. Sic.Acqua San.: PROBES ALARM SERVICE CIRC. Menu Service 1°...
  • Page 75 LHi P2U/P2S/P4U/P4S • Inverter speed • Status • RV • Fixed Inverter Management In ve rte r spee d : 5 2 9 5 Fixed Compressor Status: SET PAG • P1: Suction pressure circ. 1 • P2 • SuperHeat Set Point •...
  • Page 76 LHi P2U/P2S/P4U/P4S • P3: Suction pressure circuit 2 • P4 • SuperHeat Set Point • Values from T8 to T12 Inverter Management Circ.2 p2.2 °C °C Suction probe Circ. 2 T10: °C T11: °C S up erH ea t S e t Poi nt : T12: °C SET PAG...
  • Page 77 LHi P2U/P2S/P4U/P4S • Capacity request • System capacity Inverter Management Capacity Request: System capacity: ESC SET PAG Inverter Management Alarm Software1: 0000 Alarm Software2: 0000 Alarm Hardware1: 0000 Alarm Hardware2: 0000 ESC SET PAG Inverter Management 20 / 20 00:00 31/08/18 00:00 31/08/18...

  • Page 78: Unit Maintenance

    LHi P2U/P2S/P4U/P4S 7. MAINTENANCE OF THE UNIT 7.1 General warnings • • • 7.2 Drive access MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...
  • Page 79 LHi P2U/P2S/P4U/P4S 7.3 Scheduled maintenance Search for leaks CASE Visual Inspection Pressure Test 7.4 Periodical checks and start up MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...
  • Page 80 LHi P2U/P2S/P4U/P4S 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.7100.GB-C-1 Operation and maintenance manual LHi series English Rev.
  • Page 81 LHi P2U/P2S/P4U/P4S 7.4.3 Compressors Frequency Action to be performed As neces- service. MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...

  • Page 82: Decommissioning

    LHi P2U/P2S/P4U/P4S 7.5 Refrigerant circuit repair Therefore: • • • • • • 8. DECOMMISSIONING 8.1 Disconnect the unit • • • • • 8.2 Disposal, recovery and recycling MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...
  • Page 83 LHi P2U/P2S/P4U/P4S 8.3 RAEE Directive (only UE) 9. DIAGNOSIS AND TROUBLESHOOTING Unit alarms Code Visualization Alarm Description Cause Solution ACF1..ACF19 AEFL ACFL AEUn AHFL MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...
  • Page 84 LHi P2U/P2S/P4U/P4S AP1...AP10 nection of the sensor to the AP11...AP20 sensor. AP21...AP27 AtC1 AtC1 AtE1 AtE2 AEht AEM1 AEM2 AFFC Atrb ALc1 ALc2 nection of the sensor to the Probe fault sensor MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev.
  • Page 85 LHi P2U/P2S/P4U/P4S Circuit alarms Code Visualization Alarm Description Cause Solution Restore the correct user B(n)HP b(n)AC b(n)AH stet point. b(n)dF Restore the correct user b(n)hP B(n)LP b(n)lP b(n)tF b(n)Cu MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...
  • Page 86 LHi P2U/P2S/P4U/P4S Compressors alarms Code Visualization Alarm Description Cause Solution C(n)tr C(n)oP C(n)dt Other alarms Visualization Alarm Description Cause Solution Termostatic expansion valves AL! Flowmeter transd. MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...
  • Page 87 LHi P2U/P2S/P4U/P4S MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...
  • Page 88 LHi P2U/P2S/P4U/P4S MTEC.7100.GB-C-1 Operation and maintenance manual LHi series English Rev. C 05-2021...

This manual is also suitable for:

Lhi p2s seriesLhi p4u seriesLhi p4s series

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