TECHNICAL & SERVICE MANUAL

Transcription

1 MANUFATUED FO: MITSUBISHI ELETI & ELETIS USA TEHNIAL & SEVIE MANUAL Series PVFY Vertical oncealed Indoor Unit <Indoor unit> Models PEA, PEA PEA, PEA PEA, PEA PEA TENTS SAFETY PEAUTIS. FEATUES. PAT NAMES AND FUNTIS. SPEIFIATI. OUTLINES AND DIMENSIS. WIING DIAGAM. EFIGEANT SYSTEM DIAGAM. TOUBLESHOOTING For use with A only. Before installation and electric work s s s s s SAFETY PEAUTIS Before installing the unit, make sure you read all the Safety precautions. The Safety precautions provide very important points regarding safety. Make sure you follow them. This equipment may not be applicable to EN-- : and EN--:. This equipment may have an adverse effect equipment on the same electrical supply system. Please report to or take consent by the supply authority before connection to the system. Symbols used in the text Warning: Describes precautions that should be observed to prevent danger of injury or death to the user. aution: Describes precautions that should be observed to prevent damage to the unit. Symbols used in the illustrations : Indicates an action that must be avoided. : Indicates that important instructions must be followed. : Indicates a part which must be grounded. : Indicates that caution should be taken with rotating parts. (This symbol is displayed on the main unit label.) <olor: Yellow> :Beware of electric shock (This symbol is displayed on the main unit label.) <olor: Yellow> Warning: arefully read the labels affixed to the main unit. Warning: Ask the dealer or an authorized technician to install the air conditioner. - Improper installation by the user may result in water leakage, electric shock, or fire. Install the air unit at a place that can withstand its weight. - Inadequate strength may cause the unit to fall down, resulting in injuries. Use the specified cables for wiring. Make the connections securely so that the outside force of the cable is not applied to the terminals. - Inadequate connection and fastening may generate heat and cause a fire. Prepare for typhoons and other strong winds and earthquakes and install the unit at the specified place. - Improper installation may cause the unit to topple and result in injury. Always use an air cleaner, humidifier, electric heater, and other accessories specified by Mitsubishi Electric. - Ask an authorized technician to install the accessories. Improper installation by the user may result in water leakage, electric shock, or fire. Never repair the unit. If the air conditioner must be repaired, consult the dealer. - If the unit is repaired improperly, water leakage, electric shock, or fire may result. Do not touch the heat exchanger fins. - Improper handling may result in injury. When handling this product, always wear protective equipment. EG : Gloves, full arm protection namely boiler suit, and safety glasses. - Improper handling may result in injury. If refrigerant gas leaks during installation work, ventilate the room. - If the refrigerant gas comes into contact with a flame, poisonous gases will be released. Install the air conditioner according to this Installation Manual. - If the unit is installed improperly, water leakage, electric shock, or fire may result. Have all electric work done by a licensed electrician according to Electric Facility Engineering Standard and Interior Wire egulations and the instructions given in this manual and always use a special circuit. - If the power source capacity is inadequate or electric work is performed improperly, electric shock and fire may result. Securely install the cover of control box and the panel. - If the cover and panel are not installed properly, dust or water may enter the outdoor unit and fire or electric shock may result. When installing and moving the air conditioner to another site, do not charge the it with a refrigerant different from the refrigerant (A) specified on the unit. - If a different refrigerant or air is mixed with the original refrigerant, the refrigerant cycle may malfunction and the unit may be damaged. If the air conditioner is installed in a small room, measures must be taken to prevent the refrigerant concentration from exceeding the safety limit even if the refrigerant should leak. - onsult the dealer regarding the appropriate measures to prevent the safety limit from being exceeded. Should the refrigerant leak and cause the safety limit to be exceeded, hazards due to lack of oxygen in the room could result. When moving and reinstalling the air conditioner, consult the dealer or an authorized technician. - If the air conditioner is installed improperly, water leakage, electric shock, or fire may result. After completing installation work, make sure that refrigerant gas is not leaking. - If the refrigerant gas leaks and is exposed to a fan heater, stove, oven, or other heat source, it may generate noxious gases. Do not reconstruct or change the settings of the protection devices. - If the pressure switch, thermal switch, or other protection device is shorted and operated forcibly, or parts other than those specified by Mitsubishi Electric are used, fire or explosion may result.

2 Warning: Note the following when building a heater in the air conditioning system. - Leave enough space between units for proper ventilation so that the indoor unit temperature does not exceed when windless. - Keep the heater clean, and take appropriate measures so that the indoor unit does not suck in the dust particles that accumulate on the heater. - Use the optional heater cable (PA-YUHT) to perform an interlocked operation with indoor units. - Do not build a heater inside the indoor unit. ecommended circuit Wiring diagram -phase power supply V, V/Hz S S ontrol board H H N H FS FS FS FS FS, Thermal fuse H, H Heater H Overheat protection thermostat H Electromagnetic contactor H H H. Precautions for devices that use A refrigerant aution: Do not use the existing refrigerant piping. - The old refrigerant and refrigerator oil in the existing piping contains a large amount of chlorine which may cause the refrigerator oil of the new unit to deteriorate. Use refrigerant piping made of (u-dhp) phosphorus deoxidized copper as specified in the *JIS H opper and copper alloy seamless pipes and tubes. In addition, be sure that the inner and outer surfaces of the pipes are clean and free of hazardous sulphur, oxides, dust/dirt, shaving particles, oils, moisture, or any other contaminant. - ontaminants on the inside of the refrigerant piping may cause the refrigerant residual oil to deteriorate. *JIS: Japanese Industrial Standard Store the piping to be used during installation indoors and keep both ends of the piping sealed until just before brazing. (Store elbows and other joints in a plastic bag.) - If dust, dirt, or water enters the refrigerant cycle, deterioration of the oil and compressor trouble may result. Use ester oil, ether oil or alkylbenzene (small amount) as the refrigerator oil to coat flares and flange connections. - The refrigerator oil will degrade if it is mixed with a large amount of mineral oil. Use liquid refrigerant to fill the system. - If gas refrigerant is used to seal the system, the composition of the refrigerant in the cylinder will change and performance may drop. Do not use a refrigerant other than A. - If another refrigerant (, etc.) is used, the chlorine in the refrigerant may cause the refrigerator oil to deteriorate. Use a vacuum pump with a reverse flow check valve. - The vacuum pump oil may flow back into the refrigerant cycle and cause the refrigerator oil to deteriorate. Do not use the following tools that are used with conventional refrigerants. (Gauge manifold, charge hose, gas leak detector, reverse flow check valve, refrigerant charge base, vacuum gauge, refrigerant recovery equipment) - If the conventional refrigerant and refrigerator oil are mixed in the A, the refrigerant may deteriorated. - If water is mixed in the A, the refrigerator oil may deteriorate. -Since A does not contain any chlorine, gas leak detectors for conventional refrigerants will not react to it. Do not use a charging cylinder. - Using a charging cylinder may cause the refrigerant to deteriorate. Be especially careful when managing the tools. - If dust, dirt, or water gets in the refrigerant cycle, the refrigerant may deteriorate. FEATUES Series PVFY Vertical oncealed Indoor Unit Indoor unit Models ooling capacity/heating capacity kw Btu / h PEA PEA PEA PEA PEA PEA PEA. /.. /.. /.. /.. /.. /.. /., /,, /,, /,, /,, /,, /,, /,

3 PAT NAMES AND FUNTIS Indoor (Main) Unit [Display] A P E B STAND BY DEFOST ENTALLY TOLLED HEK TEMP. LOK EO ODE Hr. NOT AVAILABLE FILTE HEK MODE TEST UN FUNTI / M F K Horizontal Left G O L I N H Q J D emote controller Operation buttons Vertical [PA-MAA] Once the controls are set, the same operation mode can be repeated by simply pressing the / button. A urrent time/timer B entralized control Timer D Timer indicator E Operation mode: OOL, DY, AUTO, FAN, HEAT F Locked indicator G Set temperature H Power I Louver J Ventilation K Filter sign L M N O P Set effective for hr. Sensor position oom temperature Airflow Fan speed BAK PA-MAA TEMP. MENU / MITO/SET DAY LOK OPEATI / FILTE HEK TEST LEA B A [Set Temperature] Button [Timer Menu] Button [Monitor/Set] Button [Mode] Button [eturn] Button [Timer On/Off] Button [Set Day] Button D [Louver] Button [Operation] Button [Fan Speed] Button [Airflow Up/Down] Button [Ventilation] Button [Operation] Button [heck/lear] Button [Test run] Button A [Filter] Button [ ] Button B [/] Button Position of built-in room temperature D [Set Time] Button Never expose the remote controller to direct sunlight. Doing so can result in the erroneous measurement of room temperature. Never place any obstacle around the lower right-hand section of the remote controller. Doing so can result in the erroneous measurement of room temperature.

4 SPEIFIATIS -. P-EA Specifications -. Electrical Parts Specifications Model Name Power Source PEA PEA PVFY Specifications PEA PEA /V, -phase, Hz PEA Note: * ooling/heating capacity indicates the maximum value at operation under the following conditions: ooling: Indoor: F ( ) DB/ F ( ) WB; Outdoor: F ( ) DB Heating: Indoor: F ( ) DB; Outdoor: F ( ) DB/ F ( ) WB * Airflow rate / sound pressure levels are at (-Mid-High) PEA PEA ooling apacity Btu/h *,,,,,,, Heating apacity Btu/h *,,,,,,, Power ooling kw. /.. /.. /.. /.. /.. /.. /. onsumption Heating kw. /.. /.. /.. /.. /.. /.. /. urrent ooling A. /.. /.. /.. /.. /.. /.. /. Heating A. /.. /.. /.. /.. /.. /.. /. MA ( / V). /.. /.. /.. /.. /.. /.. /. MOP A Height Inches -/ -/ Dimensions Width Inches -/ -/ Depth Inches -/ Net Weight Unit Pounds Heat Exchanger ross Fin (Aluminum Plate Fin and opper Tube) Type x Qty. Forward urved Blower x Fan Air Filter efrigerant Pipe Dimensions Drain Pipe Dimension. ESP Airflow ate , * External Static Pressure Motor Type Pressure (Brazed) High Pressure (Brazed) Primary Secondary -,-,. ESP ,.-,-, In. WG. /. (Selectable) High-efficiency D Filter and ack -field supplied Inches / / Inches / / Inches / FPT / FPT,-,-,,-,-, Model Parts Symbol name MF LEV PEA PEA PEA PEA PEA Transformer T (Primary) V Hz (Secondary) (.V.A) Transformer T (Primary) /V Hz (Secondary) (V) oom temperature thermistor Liquid pipe thermistor Gas pipe thermistor Fuse(Indoor controller board) Linear expansion valve Power supply terminal bed Transterminal mission bed TH TH TH esistance [ F]/k, [ F]/.k, [ F]/.k, [ F]/.k, [ F]/.k, [ F]/.k esistance [ F]/k, [ F]/.k, [ F]/.k, [ F]/.k, [ F]/.k, [ F]/.k esistance [ F]/k, [ F]/.k, [ F]/.k, [ F]/.k, [ F]/.k, [ F]/.k FUSE V.A TB TB TB / hp / hp / hp / hp DV Stepping motor drive port dimension. (~pulse) EDM-MD. (~pulse) EDM-MD (L,L,G) V A / hp (,),(M,M,S) V A Fan motor (with Innerthermostat) PEA / hp DV Stepping motor drive port dimension PEA / hp. (~ pulse) EDM-AY

5 OUTLINES AND DIMENSIS P EA P EA

6 P EA WIING DIAGAM P,, P, P, P, P, PEA NV X NT NP(Blue) INSIDE SETI OF TOL BOX X X X X N ZN I.B. NA (Blue) N N N N (Green) F AV (.A T ) NM (Blue) ZN DSA ND(ed) TB (TANSMISSI TEMINAL BED) M M TB (TANSMISSI TEMINAL BED) S(SHIELD) L L TB TO MA EMOTE TOLLE TO OUTDOO UNIT B TOLLE EMOTE TOLLE TO NEXT INDOO UNIT PULL BOX G FUSE(A) BEAKE(A) POWE SUPPLY /V Hz V V L High Med. VA T Volts A For V power supply, switch the transformer lead marked V with the one marker V. eattach wire nut to bare wire. VA VA VA FAN MOTO L G N VA /V Hz Ground /V Hz (Yellow) As shipped. esp connection VA VA VA FAN MOTO L G N N For field selected. esp, change low voltage connections as shown N N N (Green) (ed) LED LED SW SW SW (st digit) SW (nd digit) A B D E F SW (onnection No.) SW SW SW SW SW N(ed) N N(Black) N N NT(ed) T TH TH TH LEV NAME onnector onnector onnector onnector onnector onnector (central control) onnector (HA terminal-a) onnector (central control) onnector (remote indication) Power supply (I.B.) Power supply (emote controller) SYMBOL NV N N N N N N N N LED LED SYMBOL EXPLANATI SYMBOL NAME MF Fan motor apacitor (for MF) I.B. Indoor controller board TB Power source terminal bed TB Transmission terminal bed Transmission terminal bed Fuse AV.A T Varistor Transformer Electronic linear expan. valve Thermistor (inlet temp.detection) TB F ZN,ZN T LEV Thermistor (piping temp.detection/liquid) Thermistor (piping temp.detection/gas) TH TH TH SW Switch (st digit address set) SW Switch (nd digit address set) SW Switch (connection No.set) SW Switch (for mode selection) SW Switch (for capacity code) SW Switch(for mode selection) SW Switch(for model selection) SW Switch(for voltage selection) SW Switch(for model selection) SW Switch(for mode selection ) X,X X Aux.relay <T>,T,T Terminal NOTE:.The wirings to TB,TB,TB shown in chained line are field work..mark indicates terminal bed, connector, board insertion connector or fastening connector of control board.

7 EFIGEANT SYSTEM DIAGAM TOUBLESHOOTING Item Item Gas pipe Heat exchanger oom temparature thermistor TH apacity A Gas pipe thermistor TH Liquid pipe thermistor TH Linear expansion valve Strainer (#mesh) Gas pipe Strainer (#mesh) P,EA ø. (/) Liquid pipe A ø. (/) Gas pipe apacity A P,,,, EA ø. (/) Liquid pipe A ø. (/) Electrical omponent Location Fan Speed elays Med High L G L M M S ircuit Board T VA T VA Flare connection mm <in.> mm <in.> -. How to check the parts Parts name oom temparature thermistor (TH) Liquid pipe thermistor (TH) Gas pipe thermistor (TH) Transformer V NT T NT ed Blue White Blue Transformer VA Fan elays For V power supply, switch the transformer lead marked V with the one marker V. eattach wire nut to bare wire. / volt supply from circuit board VA ommon lead High Med. V Orange Disconnect the connector, then measure the resistance using a tester. (Sorrounding temperature ~ [ F~ F]) Normal.k ~.k Abnormal Open or short (efer to the thermistor) Disconnect the connector and measure the resistance using a tester. NT()-() NT()-() V White L Black /VA T Volts A For V power supply, switch the transformer lead marked V with the one marker V. eattach wire nut to bare wire. VA to motor speeds VA Normal App. App. V Orange heck points Abnormal Open or short Make sure the proper transformer lead is connected for the proper supply voltage. See diagram at left. Measure the supply voltage to the transformer. The supply voltage should be between and volts if the transformer is connected to a volt power supply. The reading should be between and volts if connected to a volt power supply. With the proper supply voltage, the transformer output voltage should be approximately volts. If no voltage is measured, replace the transformer. /VA Volts A There are fan relays. One relay for each high, medium and low speed operation. The fan relays have a / V A coil that is energized by the circuit board. The relay switches a V A circuit, which provides the speed signal for the motor. The relay energized will be determined by which speed is selected at the controller. To check operation: Make sure power to the system is on and the unit is not in standby mode.. Select high, medium or low speed at the controller.. At the corresponding relay based on the speed selected, check the voltage across the relay coil which is supplied from the circuit board.. If / V is measured, go on to step. If no voltage is measured, replace the circuit board.. If there is voltage present, the relay contact should be closed.. To check the contact. Turn power off. emove the V wires from relay contact.. eapply voltage and select the fan speed. heck the continuity across the contact. If there is no continuity across the contact, replace the relay. If there is continuity across the contact, the relay is OK. efer to the motor troubleshooting section. Linear expansion Disconnect the connector then measure the resistance valve using a tester. valve N efer to the next page for a detail. White Normal Abnormal Yellow Orange ()-() ()-() ()-() ()-() LEV Blue White-ed Yellow-Brown Orange-ed Blue-Brown ed Brown % V White L Black T Open or short Line Voltage TB TB Terminal Strip Terminal Terminal Transformers /V ph.

8 <Output pulse signal and the valve operation> <Thermistor haracteristic graph> Thermistor for lower temperature Thermistor =k % Fixed number of B=k % t=exp { ( )} +t F k F.k F.k F.k F.k F.k oom temparature thermistor(th) Liquid pipe thermistor(th) Gas pipe temparature thermistor(th) esistance (k ) < Thermistor for lower temperature > - - ( ) - [ F] Temperature Output (Phase) ø ø ø ø Output ➁ Linear expansion valve operation Valve position (capacity) A E lose Open D pulse Opening a valve all the way losing a valve : Opening a valve : The output pulse shifts in above order.. When linear expansion valve operation stops, all output phase become.. At phase interruption or when phase does not shift in order, motor does not rotate smoothly and motor will locks and vibrates. When the switch is turned on, pulse closing valve signal will be send till it goes to A point in order to define the valve position. When the valve move smoothly, there is no noise or vibration occurring from the linear expansion valve : however, when the pulse number moves from E to A or when the valve is locked, more noise can be heard than normal situation. Noise can be detected by placing the ear against the screw driver handle while putting the screw driver to the linear expansion valve. Linear expansion valve B Extra tightning (~pulse) Pulse number Operation summary of the linear expansion valve. Linear expansion valve open/close through stepping motor after receiving the pulse signal from the indoor controller board. Valve position can be changed in proportion to the number of pulse signal. <onnection between the indoor controller board and the linear expasion valve> Linear expansion valve M White ed Blue Brown Yellow Orange ø ø ø ø Brown ed Blue Orange Yellow White onnector(n) ontroller board ø DV ø ø ø Drive circuit ➂ Trouble shooting Symptom Operation circuit failure of the micro processor. Linear expansion valve mechanism is locked. Short or breakage of the motor coil of the linear expansion valve. Valve doesn t close completely (thermistor leaking). Wrong connection of the connector or contact failure. heck points Disconnect the connector on the controller board, then connect LED for checking. kω LED Pulse signal will be sent out for seconds as soon as the main switch is turn on. If there is LED with lights on or lights off, it means the operation circuit is abnormal. Motor will idle and make ticking noise when motor is operated while the linear expansion valve is locked. This ticking sound is the sign of the abnormality. Measure the resistance between the each coil (red-white, red-orange, brown-yellow, brown-blue) using a tester. It is normal if the resistance is in the range of Ω %. To check the linear expansion valve, operate the indoor unit in fan mode and at the same time operate other indoor units in cooling mode, then check the pipe temperature <liquid pipe temperature> of the indoor unit by the outdoor multi controller board operation monitor. During fan operation, linear expansion valve is closed completely and if there are some leaking, detecting temperature of the thermistor will go lower. If the detected temperature is much lower than the temperature indicated in the remote controller, it means the valve is not closed all the way. It is not necessary to exchange the linear expansion valve, if the leakage is small and not making any trouble. ountermeasures Exchange the indoor controller board at drive circuit failure. Thermistor (TH) Linear expansion valve heck the color of lead wire and missing terminal of the connector. Exchange the linear expansion vale. Exchange the linear expansion valve. If large amount of refrigeration is leaked, exchange the linear expansion valve. Disconnect the connector at the controller board, then check the continuity.

9 -. Fan Motor Troubleshooting All Models If the motor rocks back and forth on start up, this is normal do not replace the motor. The motor may surge if operating outside the design static pressure range. Verify that the system design static matches the selected motor static pressure settings. The system is noisy and does not change speeds based on commands from the remote controller or the indoor unit is going into freeze protection cycle. heck to make sure the airflow settings are correct for the installation per the indoor unit specifications. First remove the system filter and check that all dampers and diffusers are open. If after removing the filter this corrects the problem, change or clean the filter. Also, check the indoor unit heat exchanger and clean as necessary. If none of this corrects the problem, check the static pressure of the system. The static pressure should fall within the guidelines given on the airflow charts. If it s outside the parameters given on these charts, correct the airflow problem. Make sure the static pressure setting on the motor matches the system requirements. If the above checks do not solve the problem, check that the supply voltage applied to the motor is correct. Measure voltage at the (L), (G), (N) connector shown on the diagram below. The motor supply voltage should be + or -% of the nominal /VA rating. If the supply voltage is not within this range, correct this before any further troubleshooting. Static Setting (esp).. High Medium High Medium FAN MOTO VA VA ommon VA L /V Hz VA G Ground -. Dip Switch Settings Switch Pole Function SW Mode Selection SW apacity code setting ~ Thermistor<Intake temperature detection>position Filter clogging detection Provided Not provided Filter life,hr hr Air intake Effective Not effective emote indication switching Thermostat signal indication Fan output indication Humidifier control Always operated while the heat is Operated depends on the condition Air flow Extra low Heat thermostat Setting air flow eset to SW- Auto reset function Effective Not effective Power / Effective Not effective MODELS SW MODELS SW MODELS SW PEA PEA Built-in remote controller PEA PEA Operation by switch Indoor unit PEA PEA emarks Address board <At delivery> Indoor controller board Set while the unit is off. <At delivery> Set for each capacity. VA N /V Hz VA PEA The motor does not run. heck for the proper line voltage power supply and ground at the (L), (G), and (N) connections. orrect any voltage issues before proceeding to the next step. Speed selections on the blower motor are done by volt supply to the motor terminals. The low voltage connections are programmed for the operating characteristics as shown in the chart above. SW Function Selection ~ MODELS SW MODELS P, EA P,,,, EA SW Indoor controller board Set while the unit is off. Turn the indoor unit on and set to any mode that will normally run the fan. (Heat, ool or Fan) If there is no volt power supply between terminals,, or and common, check the wire(s) from the relays located in the control box. If the line voltage supply is within range and volts is supplied to any of the connector combinations shown in the chart above and the motor does not operate, replace the motor. SW Unit ~ Selection P~EA <At delivery> Indoor controller board Set while the unit is off. Note :The DipSW setting is effective during unit stopping ( remote controller ) for SW,, and commonly and the power source is not required to reset.

10 Switch Pole Operation by switch emarks SW st digit address setting SW nd digit address setting otary switch SW SW Address setting should be done when network remote controller (PA-FMA) is being used. Address board Address can be set while the unit is stopped. <At delivery> SW SW Note: SW onnect ion No. setting Note: otary switch E D B SW A F This is the switch to be used when the indoor unit is operated with series outdoor unit as a set. Address board <At delivery> SW E D F B A Note : The DipSW setting is effective while the unit is not operating (remote controller ) for SW,,, and. MANUFATUED FO: MITSUBISHI ELETI & ELETIS USA,