Viessmann C303H Service Instructions For Contractors Download Page 2 | Manualshive

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Please follow these safety instructions closely to prevent accidents and
material losses.

Safety instructions explained

Danger

This symbol warns against the
risk of injury.

!

Please note

This symbol warns against the
risk of material losses and
environmental pollution.

Note

Details identified by the word "Note"
contain additional information.

Target group

These instructions are exclusively
designed for qualified personnel.

&

Work on the refrigeration circuit
must only be carried out by qualified
and authorised refrigeration engi-
neers.

&

Work on electrical equipment must
only be carried out by a qualified
electrician.

&

The system must be commissioned
by the system installer or a qualified
person authorised by the installer.

Regulations

Observe the following when working
on this system

&

all legal instructions regarding the
prevention of accidents,

&

all legal instructions regarding
environmental protection,

&

the Code of Practice of relevant
trade associations.

&

all current safety regulations as
defined by DIN, EN, VDE and all
locally applicable standards

Working on the system

&

Isolate the system from the power
supply and check that it is no longer
'live', e.g. by removing a separate
fuse or by means of a main isolator.

Danger

Contact with 'live' compo-
nents can lead to severe inju-
ries. Some components on
the PCBs will remain 'live'
even after the power supply
has been switched OFF.
Prior to removing equipment
covers wait at least 4 min. to
allow the voltage to dissi-
pate.

&

Safeguard the system against
unauthorised reconnection.

!

Please note

Electronic modules can be
damaged by electrostatic dis-
charges.
Touch earthed objects, such as
heating or water pipes, to dis-
charge static loads.

Safety instructions

2

Safety instructions

5692

689

GB

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Summary of Contents for C303H

Page 1: ... 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 5692 689 GB 8 2008 Please keep safe ...

Page 2: ...king on this system all legal instructions regarding the prevention of accidents all legal instructions regarding environmental protection the Code of Practice of relevant trade associations all current safety regulations as defined by DIN EN VDE and all locally applicable standards Working on the system Isolate the system from the power supply and check that it is no longer live e g by removing a...

Page 3: ... and wearing parts Please note Spare and wearing parts that have not been tested together with the heating system can compromise its function Instal ling non authorised compo nents and non approved modifications or conversions can compromise safety and may invalidate our warranty For replacements use only ori ginal spare parts supplied or approved by Viessmann Safety instructions cont 3 Safety ins...

Page 4: ...307H 35 Connection and wiring diagrams Internal devices 36 External units 43 Parts lists Parts lists internal devices 48 Parts list external units 49 Commissioning service reports Maintenance checklist Vitoclima 200 S 300 S 50 Specification Specification 52 Specification internal devices 53 Specification external units 55 Certificates Declaration of conformity 57 Keyword index 58 Index 4 Index 569...

Page 5: ...8 Checking the free rotation of the external fan 12 09 Cleaning the heat exchanger of the external unit 13 10 Cleaning the air filter of the internal device 13 11 Replacing or cleaning the electrostatic filter of the internal device if installed 14 12 Replacing the active charcoal filter if installed 14 13 Switching ON the main fuse MCB 14 Switching the unit ON 14 15 Installation test only type OT...

Page 6: ...ps Inspection steps Maintenance steps Page 21 Charging the external unit with refrigerant if units devices must be separated 15 Steps commissioning inspection and cont 6 Commissioning inspection maintenance 5692 689 GB ...

Page 7: ...power supply check that it is no longer live and safeguard against unauthorised reconnection Evacuating the refrigerant lines and internal devices Evacuating type OD306H Note Prior to evacuating the system carry out a leak test pressure test with dried nitrogen Further details regarding the individual steps 7 Commissioning inspection maintenance 5692 689 GB ...

Page 8: ...al unit F Internal device A G Internal device B H Liquid line K Suction line L Liquid line M Suction line N Service valve with protective cap O Three way valve Evacuate the system at the service valves of the external unit Evacuate the internal devices F and G in sequence Further details regarding the individual steps cont 8 Commissioning inspection maintenance 5692 689 GB ...

Page 9: ... the indicated value change within this period that would indi cate a leak Remove the leak and repeat the process 6 Run vacuum pump A until a vacuum has been built the value indicated by the pressure gauge must be near to 0 bar Note The pump runtime will be subject to the ambient conditions 7 Remove filling hose D from ser vice valve N then first fit and sub sequently tighten the protective cap wi...

Page 10: ...ose of pres sure gauge set D with vacuum pump A 2 Connect the ends of the filling hose without valves with the connections of the pressure gauge set D 3 Remove the protective caps from service valves F and connect fill ing hoses C and E 4 Start vacuum pump B The needle of the pressure gauge must move from 0 mPa towards 0 1 mPa Let the pump run for 15 min Note Should the needle not move as describe...

Page 11: ...ighten the protective valve caps with 11 to 13 Nm Checking the refrigerant lines for leaks Danger Prevent an unregulated escape of R 410A in sealed rooms ensure adequate ventilation Always observe all relevant regulations and directives regarding the handling of refrigerant Note In this refrigerant circuit the refriger ant R 410A is used R 410A is a non toxic gas that displaces air and is composed...

Page 12: ...not drain fully through the drain hose of the internal device Check the horizontal level of the internal device the condensate pan must have a slope Check the drain of the condensate pan for blockages Check the drain line The slope must be at least 2 along the entire drain line Checking the free rotation of the external fan Danger Unintentional starting of the fan can lead to severe injuries Isola...

Page 13: ...uminium fins of the heat exchanger for deformation and scratches if required repair with a suitable tool 4 Close the casing of the external unit Cleaning the air filter of the internal device Note The air filter prevents the ingress of dust and other particles A blocked air filter can reduce the output of the air conditioning unit substan tially Check the condition of the air filter regularly Wall...

Page 14: ...acing the active charcoal filter if installed Replace the active charcoal filter annually it cannot be cleaned Switching the unit ON Switch on the unit with the remote control of the internal device See operating instructions Installation test only type OT307H The installation test examines whether refrigerant lines and communication lines have been connected to the same internal device The instal...

Page 15: ...at a high fan speed Check the temperature of the inrush ing and blown out air The temperature differential should be at least 8 K Charging the external unit with refrigerant if units devices must be separated If the external unit and the internal device must be separated the external unit can be charged with refrigerant 1 Set the system to cooling 2 Close the liquid valve see page 10 3 Close the s...

Page 16: ...ing of the MODE key enables a changeover between the internal device and the external unit This is acknowledged by three short tones and the illumination of the cooling and heating LEDs The remaining LEDs on the internal device flash whilst the diagnosis of the external unit progresses The remaining LEDs on the internal device flash whilst the diagnosis of the internal device progresses Fault code...

Page 17: ...era ture sensor not con nected 06 N A 07 Communication error Incompatible controllers of the internal device and the external unit Replace the controller of the internal de vice 08 No communication Check the connecting cable between the internal device the external unit and earth 09 No coding Check fan motor connection replace fan motor Replace the controller of the internal device 10 N A 11 Exter...

Page 18: ...internal device 25 EEPROM faulty 26 Poor communication Check the electrical con necting cable between the internal device the external unit and earth 27 Utilisation of EEPROM data No fault 28 Model A 29 Model B 30 Model C 31 Model D Cooling and heating LEDs illumi nate together Only the heating LED illuminates Diagnosis at the external unit type OD306H The MSMP controller is equipped with 9 LEDs 1...

Page 19: ...code is displayed by the fault LEDs Note Only one fault code will be displayed even if several faults have occurred To display further fault codes Switch the unit OFF and isolate it from the power supply Remove the fault Call up the diagnostic function again Fault codes external unit type OD306H No Fault code Fault Cause Remedy 5 4 3 2 1 01 Temperature sensor of the heat exchanger of the external ...

Page 20: ...Suction gas tempera ture sensor short cir cuit if enabled 11 Processor fault Controller problem Check the connecting cable and jumper settings replace con troller 12 EEPROM faulty Device operates with ROM parameters replace control ler 13 DC undervoltage Check the voltage at the ex ternal unit 14 DC overvoltage 15 AC undervoltage 16 Communication error Incompatible controllers of the internal devi...

Page 21: ...e connecting cable between the internal device the external unit and earth N A 29 No fault heating mode 30 No fault cooling de humidifying ventila tion operation 31 No fault standby Cooling and heating LEDs illumi nate together Only the heating LED illuminates Diagnosis at the external unit type OT307H The external unit is equipped with a programming unit with a three digit display Menu structure ...

Page 22: ... fault code Note Only one fault code will be displayed even if several faults have occurred To display further fault codes Switch the unit OFF and isolate it from the power supply Remove the fault Call up the diagnostic function again Fault codes external unit type OT307H Fault code Fault Cause Remedy 01 Temperature sensor at the heat exchanger of the external unit Check sensor connection replace ...

Page 23: ...age at the compressor speed controller air inlet blocked check compressor motor 12 Compressor idle Checking the compressor 13 Max compressor speed ex ceeded Restart if problem persists re place controller 14 Excessive compressor power consumption Checking the compressor 15 DC undervoltage DC voltage below limit replace controller 16 DC overvoltage Check mains voltage max 264 V if OK then replace c...

Page 24: ... 26 Protection against icing up No fault protection against icing up is active during defrosting 27 Overtemperature cut out com pressor compressor is switched OFF Check whether there is insuffi cient refrigerant 28 System overload protection compressor is switched OFF No measure required compres sor delay approx 2 h 29 EEPROM faulty Restart replace controller if EE PROM is required operation with ...

Page 25: ...eries dead Replace batteries Faulty connection be tween PCB internal de vice and display PCB receiver PCB for duct mounted devices Check connection Display PCB receiver PCB for duct mounted devices faulty Replace PCB PCB internal device faulty Replace PCB No air delivery at the in ternal device Equipment in heating mode and heat exchan ger not yet warm Switch to cooling mode and check No low volta...

Page 26: ...nger of the external unit is icing up Temperature sensor of the heat exchanger of the external unit faulty or incorrect connection Check connection and re place temperature sen sor if required Controller external unit faulty Replace controller Ice forms at the bottom of the external unit Condensate drain frozen up Connect defrost heater Compressor in the exter nal unit does not run No voltage at t...

Page 27: ... Condensate pan drain or drain pipe blocked Remove blockage Drain pipe incorrectly routed Route the drain pipe with a slope of at least 2 For cassette device Condensate pump does not start Check sensors for con densate level controller and pump Water drips from the bot tom of the external unit Condensate drain blocked Open external unit re move blockage clean the bottom of the equipment interior O...

Page 28: ...e lower than 0 5 Ohm Reversing valve In heating mode the voltage at the reversing valve must be 220 V Electronic expansion valve EEV The voltage at the stepper motor of the valve must be 12 V The EEV must be switched ON simul taneously with the external unit It will generate noise and vibrations Checking the essential components of the external unit type OT307H Refrigerant circuit The refrigerant ...

Page 29: ...e the motor if the motor bearings have seized up If the fan can rotate freely the AC power consumption of every phase must be below 1 A If no current flows check the resis tance between the three poles The three winding resistances should be approximately the same The stan dard value would be between 10 and 20 Ω Switch the equipment to standby or OFF and then ON again If the pro blem persists repl...

Page 30: ...n the EEV is faulty If the stepper motor is OK see above and the internal device still delivers no cooling replace the valve It is not necessary to drain the refrigerant Charge the external unit with refriger ant see page 15 Temperature sensors Check connections and connecting cables At a temperature of 0 to 40 C the sensor resistance should be between 35 and 5 kΩ Communication between the interna...

Page 31: ... C set temperature and a high fan speed or heating 30 C set temperature and a high fan speed See operating instructions 2 Hold down the MODE key at the internal device for duct mounted devices at the receiver for 5 to 10 s Type OT307H Call up the test mode Maintenance at the programming unit of the external unit see page 31 Menu structure overview only external unit type OT307H CL Ht Sb Operating ...

Page 32: ...ch Default operation determines the operating mode PAr Parameter change CHg Change parameters rSt Reset to factory settings Stt Status 2 IdU Internal de vice ICt Tempera ture at the heat ex changer of the internal device A Internal de vice A b Internal de vice B C Internal de vice C d Internal de vice D oPr Operating mode A Internal de vice A b Internal de vice B C Internal de vice C d Internal de...

Page 33: ...tion gas temperature cir cuit A rgb Suction gas temperature cir cuit B rgC Suction gas temperature cir cuit C rgd Suction gas temperature cir cuit D SCt Wet steam temperature EEA Electronic expansion valve A EEb Electronic expansion valve B EEC Electronic expansion valve C EEd Electronic expansion valve D Pr Power supply CUr Current A at the compressor tr Timer CoP Compressor time Diagnosis cont 3...

Page 34: ...ine F Three way valve with connection for suction line and service valve G Heat exchanger with temperature sensor of internal devices A and B H Liquid separator K Compressor L Four way reversing valve Note The refrigerant circuit is changed over by four way reversing valve L from cooling to heating Type OD306H 34 Refrigerant circuits 5692 689 GB ...

Page 35: ...lve F Electronic expansion valves G Filter H Suction gas temperature sensor circuit A K Heat exchanger with temperature sensors of internal devices A B and D L Pre liquid separator M Main liquid separator N Compressor O Oil separator P Four way reversing valve Note The refrigerant circuit is changed over by four way reversing valve P from cooling to heating Type OT307H 35 Refrigerant circuits 5692...

Page 36: ...r at the heat exchanger of the internal device F Ioniser G Electrostatic filter H Stepper motor for air flaps K On site time switch option L Display PCB M Power supply 230 V 50 Hz Colour coding to DIN IEC 60757 BK Black BN Brown BU Blue GNYE Green Yellow GY Grey RD Red WH White Internal devices 36 Connection and wiring diagrams 5692 689 GB ...

Page 37: ... heat exchanger of the internal device G Ioniser H Electrostatic filter K Stepper motor for air flap L Stepper motor for air flap M On site time switch option N Power supply 230 V 50 Hz Colour coding to DIN IEC 60757 BK Black BN Brown BU Blue GNYE Green Yellow GY Grey RD Red WH White Internal devices cont 37 Connection and wiring diagrams 5692 689 GB ...

Page 38: ...rature sensor C Temperature sensor at the heat exchanger of the internal device D Power supply 230 V 50 Hz E Control PCB F Display PCB G Stepper motor for vertical air flap H Condensate overflow switch K Fan L Transformer Internal devices cont 38 Connection and wiring diagrams 5692 689 GB ...

Page 39: ... air flap N Condensate pump O Interface RS485 P On site time switch option Colour coding to DIN IEC 60757 BK Black BN Brown BU Blue GNYE Green Yellow GY Grey RD Red Internal devices cont 39 Connection and wiring diagrams 5692 689 GB ...

Page 40: ... Temperature sensor at the heat exchanger of the internal device D Power supply 230 V 50 Hz E Control PCB F Receiver G Condensate overflow switch H Fan K Stepper motor for horizontal air flap L On site condensate pump option Internal devices cont 40 Connection and wiring diagrams 5692 689 GB ...

Page 41: ...n Yellow GY Grey First floor Orange RD Red VT Violet WH White Duct mounted device type D305H A Ioniser option B Fuse T3 15 A slow C On site condensate pump option D On site time switch option E Condensate overflow switch F Room temperature sensor Internal devices cont 41 Connection and wiring diagrams 5692 689 GB ...

Page 42: ...n with external unit L Remote control receiver with LEDs and user interface M Power supply 230 V 50 Hz N Fan Colour coding to DIN IEC 60757 BK Black BN Brown BU Blue GNYE Green Yellow GY Grey First floor Orange RD Red VT Violet WH White Internal devices cont 42 Connection and wiring diagrams 5692 689 GB ...

Page 43: ...the heat exchanger of the external unit 2 Compressor temperature sen sor 3 Outside temperature sensor 4 Suction gas temperature sensor on the compressor 5 Processor temperature sensor H Connection with internal device A K Connection with internal device B L Power supply 230 V 50 Hz External units 43 Connection and wiring diagrams 5692 689 GB ...

Page 44: ... message output T Night mode switch U Standby mode switch V 1 Suction gas temperature sensor circuit A 2 Suction gas temperature sensor circuit B Colour coding to DIN IEC 60757 BK Black BN Brown BU Blue RD Red WH White External units cont 44 Connection and wiring diagrams 5692 689 GB 1Filter for electromagnetic interferences ...

Page 45: ...voltage E Compressor F Electronic expansion valves EEV for the refrigerant circuits A B C 1 and D G Fan speed sensors H Additional connection e g PC for software update K Wet steam temperature sensor External units cont 45 Connection and wiring diagrams 5692 689 GB 1Not applicable to type OT307H ...

Page 46: ...switch 4 Default mode switch 1 heat ing 0 cooling 5 Fault message output max 230 V 1 A 6 MegaTool not available S Programming unit PCB T Choke coil U Connection to the EMI filter PCB see page 46 U Connection to the power supply PCB see page 45 V EMI filter PCB 2 W Power supply 230 V 50 Hz X Connection with the internal devices A B C 1 and D External units cont 46 Connection and wiring diagrams 569...

Page 47: ...Colour coding to DIN IEC 60757 BK Black BN Brown BU Blue GNYE Green Yellow GY Grey First floor Orange RD Red VT Violet WH White External units cont 47 Connection and wiring diagrams 5692 689 GB ...

Page 48: ...d C305H When ordering spare parts Quote the part and serial no see type plate and the item no of the required part as per this parts list Obtain standard parts from your local supplier Parts 001 Air filter 006 Impeller 007 Fan motor 009 Display PCB 010 Controller 011 Room temperature sensor 012 Temperature sensor 014 Condensate pump 015 Air flap 016 Stepper motor for air flap 017 Economy transform...

Page 49: ...ersing valve 005 Coil for four way reversing valve only type OT307H 006 Compressor temperature sensor 007 Temperature sensor only type OD306H 008 Temperature sensor suction side only type OT307H 009 Temperature sensor heat exchanger only type OT307H 010 Electronic expansion valve 011 Electronic display only type OT307H 012 Terminal block only type OT307H 013 Outside temperature sensor 014 Controll...

Page 50: ... Inlet Outlet Compressor in the external unit Compressor condition Noise emissions test Compressor current Hot gas temperature C Suction gas tempera ture C Liquid pressure bar Vacuum pressure bar Compressor heater option Defrost heater option Refrigerant circuit Soundness Filling level Thermal insulation Four way reversing valve Expansion valves Maintenance checklist Vitoclima 200 S 300 S 50 Commi...

Page 51: ...Cleane d Comments Control unit and electrical equipment Contactors Remote control Cables Temperature sensors Relay Other Tested by Date Maintenance checklist Vitoclima 200 S 300 S cont 51 Commissioning service reports 5692 689 GB ...

Page 52: ... EER Heating COP 01 5 0 1 4 6 0 6 2 1 3 7 1 1 5 0 4 2 1 1 7 0 3 2 0 3 4 A 3 7 A 02 5 5 1 4 6 4 6 6 1 3 7 4 1 9 0 4 2 1 1 8 0 3 2 0 3 0 C 3 7 A 03 6 0 1 4 6 5 7 0 1 3 7 8 2 0 0 4 2 2 2 0 0 3 2 1 2 9 C 3 5 B 04 to 12 7 2 2 7 9 0 9 2 1 10 9 2 2 1 0 3 0 2 4 0 6 2 9 3 2 A 4 0 A Specification 52 Specification 5692 689 GB 1Internal devices type W303H and C303H 2Internal devices type W304H C304H and D304H...

Page 53: ... 15 wet bulb 10 Standard 1 C 27 19 wet bulb 20 Maximum C 32 23 wet bulb 27 Outside temperature Minimum C 10 15 16 wet bulb Standard C 35 7 6 wet bulb Maximum C 46 24 18 wet bulb Voltage range V 198 to 264 Specification internal devices Wall mounted boilers Internal device W303H W304H W305H Fan 1 crosscurrent fan 1 radial fan Speed 3 stages rpm 1200 1050 900 Air flow rate cooling 3 stages m3 h 530 ...

Page 54: ...rnal device C303H C304H C305H Fan 1 radial fan Air flow rate cooling 3 stages m3 h 570 500 435 580 510 435 730 630 510 Air flow rate heating 3 stages m3 h 600 530 450 620 560 450 730 630 510 Sound power level 3 stages dB A 42 48 42 49 59 55 46 Sound pressure level 1 3 stages dB A 40 36 31 40 36 30 44 42 40 Dimensions Width mm 571 Height mm 287 Length mm 571 Weight kg 26 Condensate drain pipe inter...

Page 55: ...9 Condensate drain pipe in ternal Ø R mm 16 19 Specification external units External unit OD306H OT307H Refrigerant R410A Refrigerant control Electronic expansion valve Compressor SCROLL Double piston Fans 1 axial fan Air volume m3 h 2160 3200 Sound power level dB A 63 64 Sound pressure level 3 dB A 37 38 Dimensions Width mm 795 950 Height mm 610 835 Length mm 290 340 Weight kg 432 70 Refrigerant ...

Page 56: ...7H Liquid line Connection R 2 x 3 x Dimensions mm 2 x 6 x 1 3 x 6 x 1 Suction line Connection R 2 x 3 x Dimensions mm 2 x 10 x 1 3 x 12 x 1 Max cable length m 30 50 Specification external units cont 56 Specification 5692 689 GB ...

Page 57: ... 1 2003 09 EN 60 335 1 2001 08 EN 55 014 2 2003 08 EN 60 335 2 40 2001 05 EN 55 022 EN 814 In accordance with the following Directives this product is designated with _ 2006 95 EC 97 23 EC 2004 108 EC 98 37 EC 93 68 EC Details as per Pressure Equipment Directive Category I module A Allendorf 01 08 08 Viessmann Werke GmbH Co KG pp Manfred Sommer Declaration of conformity 57 Certificates 5692 689 GB...

Page 58: ...ng the refrigerant lines for leaks 11 Checklist 50 Cleaning the heat exchanger of the external unit 13 Commissioning 7 Connection and wiring diagrams 36 D Declaration of conformity 57 Diagnosis at the external unit type OD306H 18 at the external unit type OT307H 21 at the internal device 16 via fault table 25 Diagnostic mode 16 E Electromagnetic faults 30 Electrostatic filter 14 Evacuating the ref...

Page 59: ...cation Equipment combinations 52 External units 55 Internal devices 53 Operating conditions 53 Output overview 52 Power supply 53 T Test mode 31 Troubleshooting 16 Keyword index cont 59 Keyword index 5692 689 GB ...

Page 60: ...8 External units Type from serial no OD306H 7245 534 OT307H 7245 535 60 Printed on environmentally friendly chlorine free bleached paper 5692 689 GB Subject to technical modifications Viessmann Werke GmbH Co KG D 35107 Allendorf Telephone 49 6452 70 0 Fax 49 6452 70 2780 www viessmann com Viessmann Limited Hortonwood 30 Telford Shropshire TF1 7YP GB Telephone 44 1952 675000 Fax 44 1952 675040 E ma...

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