Viessmann Vitoclima 300-S Service Instructions For Contractors
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Viessmann Vitoclima 300-S Service Instructions For Contractors

Multi-split air-conditioning unit with inverter technology comprising an external unit and an internal device
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VIESMANN
Service instructions
for contractors
Vitoclima 300-S
Multi-split air-conditioning unit with inverter technology
comprising an external unit and an internal device
For applicability, see the last page
VITOCLIMA 300-S
Please keep safe.
5692 689 GB
8/2008

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  • Page 1 VIESMANN Service instructions for contractors Vitoclima 300-S Multi-split air-conditioning unit with inverter technology comprising an external unit and an internal device For applicability, see the last page VITOCLIMA 300-S Please keep safe. 5692 689 GB 8/2008...
  • Page 2 Safety instructions Safety instructions Please follow these safety instructions closely to prevent accidents and material losses. Safety instructions explained the Code of Practice of relevant trade associations. Danger all current safety regulations as This symbol warns against the defined by DIN, EN, VDE and all risk of injury.
  • Page 3 Replace faulty components compromise its function. Instal- only with original Viessmann ling non-authorised compo- spare parts. nents and non-approved modifications or conversions can compromise safety and may invalidate our warranty.
  • Page 4 Index Index Commissioning, inspection, maintenance Steps - commissioning, inspection and maintenance ........Further details regarding the individual steps ..........Troubleshooting Diagnosis ....................16 Refrigerant circuits Type OD306H ..................... 34 Type OT307H ..................... 35 Connection and wiring diagrams Internal devices ..................36 External units .....................

  • Page 5: Table Of Contents

    Commissioning, inspection, maintenance Steps - commissioning, inspection and maintenance For further information regarding the individual steps, see the page indicated Commissioning steps Inspection steps Maintenance steps Page 1. Switching OFF the unit and the main fuse/MCB ..2.

  • Page 6: Commissioning Steps

    Commissioning, inspection, maintenance Steps - commissioning, inspection and . . . (cont.) Commissioning steps Inspection steps Maintenance steps Page 21. Charging the external unit with refrigerant (if units/ devices must be separated) ..........

  • Page 7: Switching Off The Unit And The Main Fuse/Mcb

    Commissioning, inspection, maintenance Further details regarding the individual steps Switching OFF the unit and the main fuse/MCB Danger Touching 'live' components can result in the transfer of dangerous body currents. Isolate the unit from the power supply, check that it is no longer 'live' and safeguard against unauthorised reconnection.
  • Page 8 Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) A Vacuum pump F Internal device A B Filling hose for connecting the G Internal device B pressure gauge set and the H Liquid line vacuum pump K Suction line C Pressure gauge set L Liquid line D Filling hose for service valve (one...
  • Page 9 Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) 1. Connect the ends of the filling hose 5. Close the valve between pressure without valves with the connections gauge set C and vacuum pump. of the pressure gauge set C. Stop vacuum pump A and wait 5 min.
  • Page 10 Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) A External unit E Filling hose for the suction side B Vacuum pump (one hose end with valve) C Filling hose for the liquid side (one F Service valves for the suction and hose end with valve) liquid side with protective caps D Pressure gauge set...

  • Page 11: Filling The Refrigerant Lines And Internal Device With Refrigerant

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) 5. Close the valve between pressure 6. Remove filling hoses C and E gauge set D and vacuum pump from service valves E, then first fit B. Stop the vacuum pump and and subsequently tighten the pro- wait 5 min.

  • Page 12: Checking The Condensate Drain Of The Internal Device

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Check all soldered points and connec- Further work on the refrigeration cir- tions of the refrigerant lines in the cuit must only be carried out by a qua- internal device and the external unit lified refrigeration engineer.

  • Page 13: Cleaning The Heat Exchanger Of The External Unit

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Cleaning the heat exchanger of the external unit 1. Open the casing of the external Please note unit. Excessive air pressure can result in the deformation of Please note the aluminium fins of the The sharp edges of the heat heat exchanger.

  • Page 14: Replacing Or Cleaning The Electrostatic Filter Of The Internal Device (If Installed)

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) In case of severe contamination, use Let the filter dry in a cool place. a soft brush and mild detergent. Replacing or cleaning the electrostatic filter of the internal device (if installed) Replace or clean the electrostatic filter every three months in use.

  • Page 15: Checking The System Function (Output Test)

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Select the installation test "It" with B/ D and confirm with C. The installation test runs automati- cally. At the end, the unit stops for 5 min. The display shows "PSS" (test suc- cessful) or "FAL"...
  • Page 16 Troubleshooting Diagnosis Diagnosis at the internal device In diagnostic mode, fault codes can be scanned individually for the internal device and the external unit. For a detailed description of the control and display elements, see the operating instructions for the "Vitoclima-S". Note For the external unit from type OT307H, the diagnosis can be implemented immediately at the external unit.
  • Page 17 Troubleshooting Diagnosis (cont.) Fault codes of the internal device Fault code Fault Cause/Remedy Room temperature Check sensor connection; sensor not connected replace sensor Room temperature sensor short circuit Temperature sensor of the heat exchanger of the internal device not connected Short circuit of the temperature sensor of the heat exchanger of...
  • Page 18 Troubleshooting Diagnosis (cont.) Fault code Fault Cause/Remedy Overtemperature cut- out of the heat exchan- ger of the internal de- vice Overrun protection (N/A) EEPROM not updated Unit operates with ROM parameters; no change of EEPROM faulty the unit settings (fan, tem- perature etc.) possible.
  • Page 19 Troubleshooting Diagnosis (cont.) The standby LED illuminates as soon as the device is switched ON. The equipment LEDs illuminate in sequence, and the respective fault code is indicated by the 5 fault LEDs. If there is no fault, the equipment LED with the corresponding status illumi- nates for 5 s and then changes to the next equipment LED.
  • Page 20 Troubleshooting Diagnosis (cont.) Fault code Fault Cause/Remedy Processor temperature Check sensor connection; sensor not connected replace sensor (if enabled) Processor temperature sensor short circuit (if enabled) Outside temperature Check sensor connection; sensor not connected replace sensor (if enabled) Outside temperature sensor short circuit (if enabled) Suction gas tempera-...
  • Page 21 Troubleshooting Diagnosis (cont.) Fault code Fault Cause/Remedy EEPROM of the com- Replace communication munication PCB (MSMP) faulty Processor overtem- perature cut-out Defrosting Compressor over- heated Compressor overcur- rent (N/A) Poor transmission Check the connecting cable quality between the internal device, the external unit and earth (N/A) No fault (heating...
  • Page 22 Troubleshooting Diagnosis (cont.) Select the required parameter with B/D. Acknowledge the selection with C. Call up the highest level with E. Select diagnosis (dIA). Select external unit/internal device: oXX Fault code external unit AXX Fault code internal device A bXX Fault code internal device B CXX Fault code internal device C dXX Fault code internal device D XX represents the fault code.
  • Page 23 Troubleshooting Diagnosis (cont.) Fault Fault Cause/Remedy code No feedback external fan/com- Check the connections of the ex- pressor ternal fan (voltage and velocity sensor); check the fan motor; check the compressor connec- tion and motor Processor fault external fan Overheating/overvoltage at the external fan controller;...
  • Page 24 Troubleshooting Diagnosis (cont.) Fault Fault Cause/Remedy code Min. compressor speed not Restart; if problem persists, re- achieved place controller of the external unit System configuration changed For information only (communi- cation cables were modified) Problem with system configura- Incorrect internal device con- tion nected;...
  • Page 25 Troubleshooting Diagnosis (cont.) Diagnosis via fault table Note Initially check the equipment for loose connecting cables. Fault Possible cause Remedy Limited heating output Extremely low outside temperature, see page 53 The standby LED of the No mains voltage (or too Check power supply internal device does not low) at the PCB term-...
  • Page 26 Troubleshooting Diagnosis (cont.) Fault Possible cause Remedy Fan of the internal device Controller (internal de- Replace controller continues to run, even vice) faulty though the equipment is switched OFF; No speed change possi- In cooling mode, limited Ice forms at the heat ex- Fix leak;...
  • Page 27 Troubleshooting Diagnosis (cont.) Fault Possible cause Remedy Compressor overheated; Electronic expansion Check expansion valve insufficient output; equip- valve faulty and replace, if required ment enters fault state Controller or refrigerant Scan fault code (see and compressor switches circuit faulty page 16) OFF without obvious rea- No output, although all Refrigerant leak;...
  • Page 28 Troubleshooting Diagnosis (cont.) Checking the essential components of the external unit, type OD306H Mains voltage The mains voltage must be between 198 and 264 V~. External fan Start test mode (see page 31). Across the orange and black core: Check the voltage at the fan motor 15 V ±...
  • Page 29 Troubleshooting Diagnosis (cont.) Mains voltage The mains voltage must be between 198 and 264 V~. Main fuse/MCB (20 A) If the fuse has blown: Changing fuses. Check the compressor, fan and other If the fuse blows regularly, replace the components that may be able to controller.
  • Page 30 Troubleshooting Diagnosis (cont.) Reversing valve The reversing valve comprises an If there is no voltage, check the elec- electromagnet and the valve itself. tromagnet with a direct power supply. In heating mode, check the voltage If OK, replace the controller. across both connections of the rever- If the electromagnet and the controller sing valve.
  • Page 31 Troubleshooting Diagnosis (cont.) Never route the air-conditioning If TV and radio reception suffers inter- system cables together with aerial ference: cables. Use aerial cables with a good screen. Use suppression filters. Use signal amplifiers. Activating test mode The test mode enables the checking of the air-conditioning unit with fixed para- meters.
  • Page 32 Troubleshooting Diagnosis (cont.) Fault diag- External unit Internal device A nosis Internal device B Internal device C Internal device D Setup de- The internal device started first determines the op- termining erating mode (standard) the operat- A P Internal device A determines the operating mode ing mode Internal device B determines the operating mode C P Internal device C determines the operating mode...
  • Page 33 Troubleshooting Diagnosis (cont.) odU External Operating mode unit Four-way reversing valve Speed Outside temperature Processor temperature Temperature at the heat ex- changer of the external unit Compressor temperature Suction gas temperature cir- cuit A Suction gas temperature cir- cuit B Suction gas temperature cir- cuit C Suction gas temperature cir-...
  • Page 34 Refrigerant circuits Type OD306H A Heat exchanger of the external F Three-way valve with connection unit with temperature sensor for suction line and service valve B Filter G Heat exchanger with temperature C Electronic expansion valve sensor of internal devices A and B D Filter H Liquid separator E Valve with connection for liquid...
  • Page 35 Refrigerant circuits Type OT307H A Heat exchanger of the external H Suction gas temperature sensor unit with temperature sensor circuit A B Liquid collector K Heat exchanger with temperature C Filter dryer sensors of internal devices A, B D Three-way valve of the liquid line and D with service valve L Pre-liquid separator...
  • Page 36 Connection and wiring diagrams Internal devices Wall mounted devices, type W303H and W304H A Connection with external unit F Ioniser B Control PCB G Electrostatic filter C Fan H Stepper motor for air flaps D Room temperature sensor K On-site time switch (option) E Temperature sensor at the heat L Display PCB exchanger of the internal device...
  • Page 37 Connection and wiring diagrams Internal devices (cont.) Wall mounted device, type W305H A Connection with external unit G Ioniser B Display PCB H Electrostatic filter C Control PCB K Stepper motor for air flap D Fan L Stepper motor for air flap E Room temperature sensor M On-site time switch (option) F Temperature sensor at the heat...
  • Page 38 Connection and wiring diagrams Internal devices (cont.) Cassette devices, type C303H, C304H and C305H A Connection with external unit F Display PCB B Room temperature sensor G Stepper motor for vertical air flap C Temperature sensor at the heat H Condensate overflow switch exchanger of the internal device K Fan D Power supply, 230 V~, 50 Hz...
  • Page 39 Connection and wiring diagrams Internal devices (cont.) M Stepper motor for horizontal air O Interface RS485 flap P On-site time switch (option) N Condensate pump Colour coding to DIN IEC 60757 Black GNYE Green/Yellow Brown Grey Blue...
  • Page 40 Connection and wiring diagrams Internal devices (cont.) Duct mounted device, type D304H A Connection with external unit F Receiver B Room temperature sensor G Condensate overflow switch C Temperature sensor at the heat H Fan exchanger of the internal device K Stepper motor for horizontal air D Power supply, 230 V~, 50 Hz flap...
  • Page 41 Connection and wiring diagrams Internal devices (cont.) M Interface RS485 N On-site time switch (option) Colour coding to DIN IEC 60757 Black First floor Orange Brown Blue Violet GNYE Green/Yellow White Grey Duct mounted device, type D305H A Ioniser (option) D On-site time switch (option) B Fuse, T3, 15 A, slow E Condensate overflow switch...
  • Page 42 Connection and wiring diagrams Internal devices (cont.) G Temperature sensor at the heat L Remote control receiver with exchanger of the internal device LEDs and user interface H MegaTool (not available) M Power supply, 230 V~, 50 Hz K Connection with external unit N Fan Colour coding to DIN IEC 60757 Black...
  • Page 43 Connection and wiring diagrams External units Type OD306H A Control PCB G 1 Temperature sensor at the heat B Compressor exchanger of the external unit C Choke coil 2 Compressor temperature sen- D Four-way reversing valve E Defrost heater, 230 V~ (option) 3 Outside temperature sensor F Fan 4 Suction gas temperature sensor...
  • Page 44 Connection and wiring diagrams External units (cont.) M Fuse, 20 A, 250 V~ T Night mode switch N Terminals U Standby mode switch O EMI filter PCB V 1 Suction gas temperature sensor P Electronic expansion valves circuit A (EEV1 and EEV2) 2 Suction gas temperature sensor R Communication PCB (MSMP) circuit B...
  • Page 45 Connection and wiring diagrams External units (cont.) Type OT307H A Power supply PCB F Electronic expansion valves B Defrost heater, 230 V~ (option) (EEV) for the refrigerant circuits C Four-way reversing valve A, B, C and D D Fan voltage G Fan speed sensors E Compressor H Additional connection (e.g.
  • Page 46 Connection and wiring diagrams External units (cont.) L Temperature sensor at the heat R Accessory connections exchanger of the external unit 1 Night mode switch M Compressor temperature sensor 2 Standby mode switch N Outside temperature sensor 3 Economy mode switch O Suction gas temperature sensors 4 Default mode switch (1 = heat- at the EEV A, B, C...
  • Page 47 Connection and wiring diagrams External units (cont.) Colour coding to DIN IEC 60757 Black First floor Orange Brown Blue Violet GNYE Green/Yellow White Grey...
  • Page 48 Parts lists Parts lists, internal devices Wall mounted devices, type W303H, W304H and W305H When ordering spare parts: 007 Fan motor Quote the part and serial no. (see 008 Stepper motor for air flaps type plate) and the item no. of the 009 Display PCB required part (as per this parts list).
  • Page 49 Parts lists Parts lists, internal devices (cont.) 020 Room temperature sensor (only 023 Room temperature sensor (only type D304H) type D305H) 021 Temperature sensor (only type 044 Remote control D304H) 022 Temperature sensor (only type 040 Operating instructions D305H) 041 Installation instructions 043 Service instructions Parts list, external units Type OD306H and OT307H...
  • Page 50 Commissioning/service reports Maintenance checklist Vitoclima 200-S/300-S Assembly checke- Cleane- Comments placed Internal device Heat exchanger sur- face Fins Condensate pan Air filter Air temperatures [ °C] Inlet Outlet External unit Fins Heat exchanger sur- face Condensate drain Air temperatures [ °C] Inlet Outlet Compressor in the external unit...
  • Page 51 Commissioning/service reports Maintenance checklist Vitoclima 200-S/300-S (cont.) Assembly checke- Cleane- Comments placed Control unit and electrical equipment Contactors Remote control Cables Temperature sensors Relay Other Tested by: Date:...
  • Page 52 Specification Specification Equipment combinations Equipment External unit Internal de- Internal de- Internal de- combination vice A vice B vice D OD306H OT307H Output overview Equip- Output in kW Power consumption Energy efficiency ment in kW combi- Cooling Heating Cooling Heating Cooling Heating (EER)
  • Page 53 Specification Specification (cont.) Power supply External unit OD306H OT307H Operating voltage V~/Ph/Hz 230/1/50 Rated current Cooling Heating Starting current 10.5 Fuse, slow Power supply cable 3 x 2.5 Connecting line to the in- each 4 x 1.5 ternal device Operating conditions Cooling Heating Internal temperature...
  • Page 54 Specification Specification, internal devices (cont.) Internal device W303H W304H W305H Air flow rate heating 570/460/350 580/480/370 850/760/620 (3 stages) Sound power level dB(A) 39 - 51 39 - 52 55/51/47 (3 stages) Sound pressure dB(A) 38/31/27 39/32/27 45/39/34 level (3 stages) Dimensions Width 1060...
  • Page 55 Specification Specification, internal devices (cont.) Duct mounted devices Internal device D304H D305H 2 radial fan 1 radial fan Speed (3 stages) 1150/1000/760 630/530/425 Air flow rate (3 stages) 830/700/530 1170/920/730 External static pressure 25 - 60 dB(A) 59/55/52 55/53/50 Sound power level stages) Sound pressure level (3 dB(A)
  • Page 56 Specification Specification external units (cont.) External unit OD306H OT307H Liquid line Connection 2 x ¼" 3 x ¼" Dimensions 2 x 6 x 1 3 x 6 x 1 Suction line Connection " 3 x ½" Dimensions 2 x 10 x 1 3 x 12 x 1 Max.
  • Page 57 Certificates Declaration of conformity We, Viessmann Werke GmbH & Co KG, D-35107 Allendorf, confirm as sole responsible body that the product Vitoclima 300-S complies with the following standards: EN 255 EN 55 082-1 EN 378 EN 60 204-1 EN 55 014-1; 2003-09 EN 60 335-1;...
  • Page 58 Keyword index Keyword index Active charcoal filter Declaration of conformity ........Air filter Diagnosis .
  • Page 59 Keyword index Keyword index (cont.) Specification Test mode ........Equipment combinations Troubleshooting .
  • Page 60 Applicability Applicable for air-conditioning units Vitoclima 300-S: Internal devices Type from serial no. W303H 3004 481 W304H 3004 482 W305H 3004 483 C303H 3004 484 C304H 3004 485 C305H 3004 486 D304H 3004 487 D305H 3004 488 External units Type from serial no.

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