Mitsubishi Electric PUZ-M200YKA2 Service Manual
  1. Manuals
  2. Brands
  3. Mitsubishi Electric Manuals
  4. Air Conditioner
  5. PUZ-M200YKA2
  6. Service manual

Mitsubishi Electric PUZ-M200YKA2 Service Manual

Split-type, heat pump air conditioners
Hide thumbs Also See for PUZ-M200YKA2:
Table of Contents

Advertisement

Quick Links

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SERVICE MANUAL
Outdoor unit
[Model Name]
PUZ-M200YKA2
PUZ-M250YKA2
[Service Ref.]
PUZ-M200YKA2.UK
PUZ-M250YKA2.UK
R32
CONTENTS
1. REFERENCE MANUAL ······················· 2
2. SAFETY PRECAUTION ······················· 2
3. FEATURES ····································· 12
4. SPECIFICATIONS ···························· 13
5. DATA ·············································· 14
6. OUTLINES AND DIMENSIONS ··········· 17
7. WIRING DIAGRAM ··························· 18
8. WIRING SPECIFICATIONS ················ 19
10. TROUBLESHOOTING ······················· 26
11. FUNCTION SETTING ························ 73
BY THE REMOTE CONTROLLER ······· 74
14. DISASSEMBLY PROCEDURE ············ 84
15. REMOTE CONTROLLER ··················· 90
PARTS CATALOG (OCB775)
September 2021
No. OCH775
Note:
• This manual describes service
data of the outdoor units only.

Advertisement

Table of Contents
loading

Related Manuals for Mitsubishi Electric PUZ-M200YKA2

Summary of Contents for Mitsubishi Electric PUZ-M200YKA2

  • Page 1: Table Of Contents

    September 2021 No. OCH775 SERVICE MANUAL Outdoor unit [Model Name] [Service Ref.] Note: • This manual describes service PUZ-M200YKA2.UK data of the outdoor units only. PUZ-M200YKA2 PUZ-M250YKA2.UK PUZ-M250YKA2 CONTENTS 1. REFERENCE MANUAL ······················· 2 2. SAFETY PRECAUTION ······················· 2 3. FEATURES ····································· 12 4.

  • Page 2: Reference Manual

    REFERENCE MANUAL INDOOR UNIT SERVICE MANUAL Service manual No. Model Name Service Ref. Parts catalog No. PLA-M50/60/71/100/125EA2 PLA-M50/60/71/100/125EA2.UK — OCH753 PCA-M71HA2 PCA-M71HA2 OCB753 OCH752 PCA-M50/60/71/100/125KA2 PCA-M50/60/71/100/125KA2 OCB752 PKA-M50LA(L)2 PKA-M50LA(L)2 .TH — PKA-M60/71/100KA(L)2 PKA-M60/71/100KA(L)2.TH — OCH724 PSA-M71/100/125KA PSA-M71/100/125KA OCB724 PEAD-M50/60/71/100/125JA(L)2 PEAD-M50/60/71/100/125JA(L)2.UK —...
  • Page 3 Use a vacuum pump with a reverse flow check Use new refrigerant pipes. valve. In the case of using the existing pipes for R22, be careful Vacuum pump oil may flow back into refrigerant cycle and with the following: that can cause deterioration of refrigerant oil, etc. ·...
  • Page 4 [1] Warning for service (1) Do not alter the unit. (2) For installation and relocation work, follow the instructions in the Installation Manual and use tools and pipe components specifically made for use with refrigerant specified in the outdoor unit installation manual. (3) Ask a dealer or an authorized technician to install, relocate and repair the unit.
  • Page 5 [4] Cautions for unit using R32 refrigerant Basic work procedures are the same as those for conventional units using refrigerant R410A. However, pay careful attention to the following points. (1) Information on servicing (1-1) Checks on the Area Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure that the risk of ignition is minimized.
  • Page 6 (3) Repair to intrinsically Safe Components Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that this will not exceed the permissible voltage and current permitted for the equipment in use. Intrinsically safe components are the only types that can be worked on while live in the presence of a flammable atmos- phere.
  • Page 7 b) Isolate system electrically. c) Before attempting the procedure, ensure that: • mechanical handling equipment is available, if required, for handling refrigerant cylinders; • all personal protective equipment is available and being used correctly; • the recovery process is supervised at all times by a competent person; •...
  • Page 8 [5] Service tools Use the below service tools as exclusive tools for R32 refrigerant. Tool name Specifications Gauge manifold · Only for R32 · Use the existing fitting specifications . (UNF1/2) · Use high-tension side pressure of 5.3MPa·G or over. Charge hose ·...
  • Page 9 (2) Cautions for refrigerant piping work New refrigerant R32 is adopted for replacement inverter series. Although the refrigerant piping work for R32 is same as for R22, exclusive tools are necessary so as not to mix with different kind of refrigerant. Furthermore as the working pressure of R32 is 1.6 times higher than that of R22, their sizes of flared sections and flare nuts are different.
  • Page 10 2-4. Choosing the outdoor unit installation location R32 is heavier than air—as well as other refrigerants— Correct Correct so tends to accumulate at the base (in the vicinity of the floor). If R32 accumulates around base, it may reach a flammable concentration in case room is small.
  • Page 11 C) Create an appropriate ventilation open area. Make sure that the width of the open area is 0.9 [m] or more and the height of the open area is 0.15 [m] or more. However, the height from the bottom of the installation space to the bottom edge of the open area should be 0.125 [m] or less.

  • Page 12: Features

    No requirements 1.84 h0 = 0 [m] Floor standing (PSA-M) FEATURES PUZ-M200YKA2.UK PUZ-M250YKA2.UK CHARGELESS SYSTEM PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT Maximum 30 m The refrigerant circuit with LEV (Linear Expansion Valve) and power reciever always control the optimal refrigerant level regardless of the length (30 m maximum and 5 m minimum) of piping.

  • Page 13: Specifications

    SPECIFICATIONS Service Ref. PUZ-M200YKA2.UK PUZ-M250YKA2.UK Power supply (phase, cycle, voltage) 3 phase 50 Hz, 400 V Max. current 22.5 External finish Munsell 3Y 7.8/1.1 Refrigerant control Linear Expansion Valve Compressor Hermetic Model AVB52FBAMT Motor output Starter type Inverter Protection devices...

  • Page 14: Data

    Initial Service Ref. charged 10 m 20 m 30 m 40 m 50 m 60 m 70 m PUZ-M200YKA2.UK +0.4 (6.0) +0.8 (6.4) +1.2 (6.8) +1.6 (7.2) PUZ-M250YKA2.UK +0.6 (7.4) +1.2 (8.0) +1.8 (8.6) +2.4 (9.2) Additional charge is required for pipes longer than 30 m.
  • Page 15 5-4. NOISE CRITERION CURVES PUZ-M200YKA2.UK PUZ-M250YKA2.UK SPL(dB) MODE LINE SPL(dB) MODE LINE COOLING COOLING HEATING HEATING NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 APPROXIMATE APPROXIMATE THRESHOLD OF THRESHOLD OF HEARING FOR HEARING FOR NC-20 NC-20 CONTINUOUS CONTINUOUS...
  • Page 16 0.07 × 2 Input 0.10 × 2 0.10 × 2 Current 0.44 × 2 0.64 × 2 0.66 × 2 0.46 × 2 Outdoor unit PUZ-M250YKA2.UK PUZ-M200YKA2.UK Phase , Hz 3, 50 3, 50 Voltage Current 10.9 2.69 2.69 Discharge pressure 3.13 3.16...

  • Page 17: Outlines And Dimensions

    OUTLINES AND DIMENSIONS Unit: mm OCH775...

  • Page 18: Wiring Diagram

    WIRING DIAGRAM OCH775...

  • Page 19: Wiring Specifications

    WIRING SPECIFICATIONS 8-1. FIELD ELECTRICAL WIRING (power wiring specifications) Outdoor unit model M200/250 Outdoor unit power supply 3N~ (3 ph 4-wires), 50 Hz, 400 V Outdoor unit input capacity main switch (Breaker) *1 32 A Outdoor unit power supply 5 × Min 4 Indoor unit-Outdoor unit Cable length 50 m:3×4 (Polar)/Cable length 80 m:3×6 (Polar) Indoor unit-Outdoor unit earth...
  • Page 20 8-2. SEPARATE INDOOR UNIT/OUTDOOR UNIT POWER SUPPLIES The following illustrations show available connection patterns. The outdoor unit power supply patterns vary on models. Simultaneous twin/triple/quadruple system <For models without heater> The optional indoor power supply terminal kit is required. Outdoor unit power supply Earth leakage breaker Wiring circuit breaker or isolating switch Outdoor unit...
  • Page 21 8-3. INDOOR – OUTDOOR CONNECTING CABLE WIRING SPECIFICATIONS FOR 220−240 V, 50 Hz (INDOOR-OUTDOOR CONNECTING CABLE) Cross section of cable Wire size (mm Number of wires Polarity L (m)*5 Round Clockwise : S1-S2-S3 (30) (Pay attention to stripe of yellow and green.) Flat Not applicable Not applicable...
  • Page 22 8-4. M-NET WIRING METHOD Points to note: (1) Outside the unit, transmission wires should stay away from electric wires in order to prevent electromagnetic noise from making an influence on the signal communication. Place them at intervals of more than 5 cm. Do not put them in the same conduit tube.
  • Page 23 M-NET wiring (1) Use 2-core × 1.25 mm² shield wire for electric wires. M-NET terminal (Excluding the case connecting to system controller.) Earth block wire (2) Connect the wire to the M-NET terminal block. Connect one core of the transmission wire (non-polar) to A terminal and the other to B.

  • Page 24: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM Unit: mm Heat exchanger Thermistor TH6 Thermistor TH7 (2-phase pipe) (Ambient) Ball valve 4-way valve Strainer Refrigerant GAS pipe connection ø25.4 (ø 1 inch ) Muffler Distributor Charge plug (Low pressure) High pressure switch 63H Charge plug Strainer (High pressure) Thermistor TH3...
  • Page 25 9-1. REFRIGERANT COLLECTING (PUMP DOWN) When relocating or disposing of the indoor/outdoor unit, pump down the system following the procedure below so that no refrig- erant is released into the atmosphere. 1 Turn off the power supply (circuit breaker). 2 Connect the low pressure valve on the gauge manifold to the charge plug (low pressure side) on the outdoor unit. 3 Close the liquid stop valve completely.

  • Page 26: Troubleshooting

    TROUBLESHOOTING 10-1. TROUBLESHOOTING <Check code displayed by self-diagnosis and actions to be taken for service (summary)> Present and past check codes are logged, and they can be displayed on the control board of outdoor unit. Actions to be taken for service, which depends on whether or not the trouble is reoccurring in the field, are summarized in the table below. Check the contents below before investigating details.
  • Page 27 • Refer to the following tables for details on the check codes. [Output pattern A] Beeper sounds Beep Beep Beep Beep Beep Beep Beep OPERATION · · · Repeated INDICATOR lamp blink pattern Approx. 2.5 s 0.5 s 0.5 s 0.5 s Approx.
  • Page 28 10-3. SELF-DIAGNOSIS ACTION TABLE <Abnormalities detected when the power is put on> Note: Refer to indoor unit section for codes starting with P and E. Check Code Abnormal points and detection method Cause Judgment and action 1 No voltage is supplied to terminal 1 Check following items.
  • Page 29 Check Code Abnormal points and detection method Cause Judgment and action Miswiring of indoor/outdoor unit 1 Contact failure or miswiring of 1 Check disconnection or looseness or connecting wire indoor/outdoor unit connecting polarity of indoor/outdoor unit connecting 1. Outdoor controller circuit board can wire wire of indoor and outdoor units.
  • Page 30 <Abnormalities detected while unit is operating> Check Code Abnormal points and detection method Cause Judgment and action High pressure(High pressure switch 63H 1 Short cycle of indoor unit 1–6 Check indoor unit and repair defect. operated)/High compressor temperature 2 Clogged filter of indoor unit 3 Decreased airflow caused by dirt (Thermal protector TRS operated) of indoor fan...
  • Page 31 Check Code Abnormal points and detection method Cause Judgment and action Open/short of outdoor unit thermistors 1 Disconnection or contact failure of 1 Check connection of connector (TH3,TH6/ (TH3, TH6, TH7, and TH8) connectors TH7) on the outdoor controller circuit Abnormal if open or short is detected during Outdoor controller circuit board.
  • Page 32 Check Code Abnormal points and detection method Cause Judgment and action To find out the detail history (latest) about U9 error, turn ON SW2-1, 2-2 and 2-6. Detailed codes Refer to "10-9. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS". Overvoltage error 1 Abnormal increase in power source 1 Check the field facility for the power •...
  • Page 33 Check Code Abnormal points and detection method Cause Judgment and action Over heat protection 1 Defective outdoor fan (fan motor) 1 Check outdoor unit air passage. Abnormal if outdoor pipe thermistor (TH3) or short cycle of outdoor unit detects 70: or more during compressor during cooling operation operation.
  • Page 34 Check Code Abnormal points and detection method Cause Judgment and action Remote controller transmission error (E0)/ 1 Contact failure at transmission 1 Check disconnection or looseness of signal receiving error (E4) wire of remote controller indoor unit or transmission wire of remote 1 Abnormal if main or sub remote controller controller.
  • Page 35 Check Code Abnormal points and detection method Cause Judgment and action Indoor/outdoor unit communication error Check LED display on outdoor controller (Signal receiving error) circuit board. (Connect A-Control service 1 Abnormal if indoor controller board could tool (PAC-SK52ST)) Refer to EA−EC item if not receive any signal normally for 6 LED displays EA−AC.
  • Page 36 Check Code Abnormal points and detection method Cause Judgment and action Serial communication error 1 Breaking of wire or contact failure 12 Check connection of each connector CN2 1 Abnormal if serial communication between of connector CN2 between the and CN4 between the outdoor controller outdoor controller circuit board and out- outdoor controller circuit board circuit board and the outdoor power cir-...
  • Page 37 <M-NET communication error> Note: “Indoor unit” in the text indicates M-NET board in outdoor unit. Check Code Abnormal points and detection method Cause Judgment and action Address duplicate definition Search the unit with same address as 1 There are 2 or more same This error is displayed when transmission address of controller of outdoor abnormality occurred.
  • Page 38 Check Code Abnormal points and detection method Cause Judgment and action NO ACK signal Common factor that has no relation Always try the following when the error with abnormality source 1. Transmitting side controller detects “A7” occurs. 1 The unit of former address does abnormal if a message was transmitted 1 Turn off the power supply of outdoor not exist as address switch has...
  • Page 39 Check Code Abnormal points and detection method Cause Judgment and action 4. If displayed address or attribute is remote Same as mentioned in “A7” of the previ- 1 During group operation with indoor unit of multi-refrigerant controller, indoor unit detects abnormal- ous page.
  • Page 40 Check Code Abnormal points and detection method Cause Judgment and action M-NET NO RESPONSE 1 Transmitting condition is repeated 1 Check transmission waveform or noise on Abnormal if a message was transmitted and fault because of noise and the transmission wire. there were reply (ACK) that message was like.
  • Page 41 Phenomena Factor Countermeasure 4. Even controlling by the wireless 1 The pair number settings of the wireless remote 1 Check the pair number settings. remote controller, no beep is heard controller and indoor controller board are and the unit does not start operating. mismatched.
  • Page 42 Symptoms: “Please Wait” is kept being displayed on the remote controller. Inspection method and Diagnosis flow Cause troubleshooting Check the display time of “Please Wait” after turning on the main power. 6 minutes 2 minutes or more or less How long is “Please Wait” •...
  • Page 43 LED display of the indoor controller board Symptoms: Nothing is displayed on the remote controller. 1 LED1 : LED2 : LED3 : Inspection method and Diagnosis flow Cause troubleshooting Check the voltage between S1 and S2 on the terminal block (TB4) of the indoor unit which is used to connect the indoor unit and the outdoor unit.
  • Page 44 LED display of the indoor controller board Symptoms: Nothing is displayed on the remote controller. 2 LED1 : LED2 : LED3 : Inspection method and Diagnosis flow Cause troubleshooting Check the voltage between S1 and S2 on the terminal block (TB4) of the indoor unit which is used to connect the indoor unit and the outdoor unit.
  • Page 45 LED display of the indoor controller board Symptoms: Nothing is displayed on the remote controller. 3 LED1 : LED2 : LED3 : — Inspection method and Diagnosis flow Cause troubleshooting Check the voltage of the terminal block (TB6) of the remote controller. 10 to 16 VDC? •...
  • Page 46 • Before repair Frequent calls from customers Phone Calls From Customers How to Respond Note Unit does 1 The operating display of remote 1 Check if power is supplied to air conditioner. not operate controller does not come on. Nothing appears on the display unless power is at all.
  • Page 47 Phone Calls From Customers How to Respond Note The room cannot be cooled or heated sufficiently. 1 Check the set temperature of remote controller. The outdoor unit cannot be operated if the set temperature is not appropriate. The outdoor unit operates in the following modes. COOL: When the set temperature is lower than the room temperature.
  • Page 48 Phone Calls From Customers How to Respond Note Something 3 Air blows out for a while after However, this control is also 3 This is not a malfunction. is wrong HEAT operation is stopped. The blower is operating just for cooling down the applied to the models which with the heated-up air conditioner.
  • Page 49 Phone Calls From Customers How to Respond Note A white mist is expelled from the indoor unit. This is not a malfunction. This may occur when the operation is started in the room of high humidity. Water or moisture is expelled from the outdoor COOL: when pipes or piping joints are cooled, they unit.
  • Page 50 10-5. HOW TO CHECK THE PARTS Parts name Checkpoints Thermistor (TH3) Disconnect the connector then measure the resistance with a multimeter. <Liquid> (At the ambient temperature 10 to 30°C) Thermistor (TH4) <Discharge> Normal Abnormal Thermistor (TH6) TH4/TH33 160 to 410 k" <2-phase pipe>...
  • Page 51 Check method of DC fan motor (fan motor/outdoor controller circuit board) 1 Notes · High voltage is applied to the connector (CNF1, 2) for the fan motor. Pay attention to the service. · Do not pull out the connector (CNF1, 2) for the motor with the power supply on. (It causes trouble of the outdoor controller circuit board and fan motor.) 2 Self check Symptom: The outdoor fan cannot rotate.
  • Page 52 10-6. HOW TO CHECK THE COMPONENTS <Thermistor feature chart> Low temperature thermistors • Thermistor <Liquid> (TH3) • Thermistor <2-phase pipe> (TH6) • Thermistor <Ambient> (TH7) Thermistor R0 = 15 k" ± 3% B constant = 3480 ± 1% =15exp{3480( – 273+t 15 k"...
  • Page 53 Linear expansion valve (1) Operation summary of the linear expansion valve • Linear expansion valve opens/closes through stepping motor after receiving the pulse signal from the outdoor controller cir- cuit board. • Valve position can be changed in proportion to the number of pulse signal. <Connection between the outdoor controller board and the linear expansion valve>...
  • Page 54 (3) How to attach and detach the coil of linear expansion valve <Composition> Linear expansion valve is separable into the main body and the coil as shown in the diagram below. Main body Stopper Coil Lead wire <How to detach the coil> Hold the lower part of the main body (shown as A) firmly so that the main body does not move and detach the coil by pulling it upward.
  • Page 55 10-7. EMERGENCY OPERATION (1) When any check codes shown below is displayed on outdoor unit, or microprocessor for wired remote controller or indoor unit has a failure while no other problems are found, emergency operation will be available by setting the emergency opera- tion switch (SWE) ON and short-circuiting the connector (CN31) on outdoor controller board.
  • Page 56 (5) Operation data during emergency operation During emergency operation, no communication is performed with the indoor unit, so the data items needed for operation are set to the following values: Operation mode Operation data Remarks COOL HEAT Intake temperature (TH1) 20.5: —...
  • Page 57 10-8. TEST POINT DIAGRAM Outdoor controller circuit board <CAUTION> TEST POINT1 is high voltage. CNDM Manual defrost, Demand control setting 1 to 2: Input of low-level sound priority mode detect history 1 to 3: Input of external contact point CN51 record reset, External signal output refrigerant address...
  • Page 58 Outdoor noise filter circuit board LI1, LI2, LI3, NI POWER SUPPLY LI1-LI2/LI2-LI3/LI3-LI1: 400 VAC input LI1-NI/LI2-NI/LI3-NI: 230 VAC input (Connect to the terminal block (TB1)) Connect to the elec- trical parts box CNAC1, CNAC2 230 VAC (Connect to the outdoor controller circuit board (CNAC)) Connect to the ACL4 CNCT...
  • Page 59 Outdoor power circuit board Brief Check of POWER MODULE If they are short-circuited, it means that they are broken. Measure the resistance in the following points (connectors, etc.). 1. Check of DIODE MODULE L1 - P1 , L2 - P1 , L3 - P1 , L1 - N1 , L2 - N1 , L3 - N1 2.
  • Page 60 Outdoor M-NET board (optional) Switch for communication LED11 LED13 display between LED12 Outdoor unit Receiving CN2M M-NET and outdoor board Transmitting connecting display Connect to M-NET Serial communication with outdoor board LED2 Energizing display of M-NET board (5V power supply) SW11 SW12 Power supply (5V/12V) input...
  • Page 61 Action by the switch operation Type of Switch No. Function Effective timing Switch No function — — — Power failure Auto recovery No auto recovery When power supply ON automatic recovery * 3,4,5 No function — — — No function —...
  • Page 62 (2) Function of connector Action by open/ short operation Types Connector Function Effective timing Short Open Connector CN31 Start When power supply ON Emergency operation Normal Special function (a) Low-level sound priority mode (Local wiring) By performing the following modification, operation noise of the outdoor unit can be reduced by about 3-4 dB. The low noise mode will be activated when a commercially available timer or the contact input of an ON/OFF switch is added to the CNDM connector (option) on the control board of the outdoor unit.
  • Page 63 <Display function of inspection for outdoor unit> The blinking patterns of both LED1 (green) and LED2 (red) indicate the types of abnormality when it occurs. Types of abnormality can be indicated in details by connecting an optional part ‘A-Control Service Tool (PAC-SK52ST)’ to connector CNM on outdoor controller board.
  • Page 64 Indication Error Outdoor controller board Check Detailed Contents code Inspection method reference LED1 LED2 page (Green) (Red) 3 blinking 1 blinking Abnormality of discharge thermistor/comp. 1 Check if stop valves are open. P.30 surface thermistor (TH4/TH33) 2 Check if connectors (TH4,TH33, LEV-A, LEV-B) on outdoor controller board are not disconnected.
  • Page 65 <Outdoor unit operation monitor function> [When optional part ‘A-Control Service Tool (PAC-SK52ST)’ is connected to outdoor controller board (CNM)] Digital indicator LED1 displays 2 digit number or code to inform operation condition and the meaning of check code by controlling DIP SW2 on ‘A-Control Service Tool’. Operation indicator SW2: Indicator change of self-diagnosis SW2 setting...
  • Page 66 The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit Pipe temperature/Liquid (TH3) −60 to 91 −60 to 91 (When the coil thermistor detects 0°C or below, “–” and temperature are displayed by turns.) °C (Example) When −10°C;...
  • Page 67 The black square ( ) indicates a switch position. Display detail Explanation for display Unit SW2 setting Pipe temperature/Liquid (TH3) on error −60 to 91 occurring (When the coil thermistor detects 0°C or below, “–” −60 to 91 and temperature are displayed by turns.) °C (Example) When −15°C;...
  • Page 68 The black square ( ) indicates a switch position. Display detail Explanation for display SW2 setting Unit 0 to 4 The number of connected indoor units (The number of connected indoor units are dis- played.) Unit 2 3 4 5 6 Capacity setting display Displayed as an outdoor capacity code.
  • Page 69 The black square ( ) indicates a switch position. Display detail Explanation for display Unit SW2 setting Indoor setting temperature 17 to 30 17 to 30 °C 2 3 4 5 6 Outdoor pipe temperature/2-phase (TH6) −60 to 91 −60 to 91 (When the temperature is 0°C or less, “–”...
  • Page 70 The black square ( ) indicates a switch position. Display detail Explanation for display Unit SW2 setting DC bus voltage 300 to 750 (M200-250Y) 300 to 750 (M200-250Y) (When it is 100 V or more, hundreds digit, tens digit and ones digit are displayed by turns.) 2 3 4 5 6 0 to 100 Capacity save...
  • Page 71 The black square ( ) indicates a switch position. Display detail Explanation for display Unit SW2 setting LEV-C opening pulse 0 to 480 0 to 480 (When it is 100 pulse or more, hundreds digit, tens digit and ones digit are displayed by turns.) (Example) When 130 pulse;...
  • Page 72 The black square ( ) indicates a switch position. Display detail SW2 setting Explanation for display Unit Sub cool on error occurring SC 0 to 130 0 to 130 (When the temperature is 100°C or more, hundreds digit, tens digit and ones digit are displayed by Cooling = TH6−TH3 turns.) °C...

  • Page 73: Function Setting

    FUNCTION SETTING 11-1. UNIT FUNCTION SETTING BY THE REMOTE CONTROLLER Each function can be set as necessary using the remote controller. The setting of function for each unit can only be done by the remote controller. Select function available from the table 1. <Table 1>...

  • Page 74: Monitoring The Operation Data By The Remote Controller

    MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER 12-1. HOW TO "MONITOR THE OPERATION DATA" Refer to "15-10. REQUEST CODE" when monitoring the operation data. 12-2. Request code list Certain indoor/outdoor combinations do not have the request code function; therefore, no request codes are displayed. Description Request content Unit...
  • Page 75 Description Request content Unit Remarks (Display range) Indoor unit-Control state – Refer to 12-2-1.Detail Contents in Request Code. Outdoor unit-Control state – Refer to 12-2-1.Detail Contents in Request Code. Compressor-Frequency control state Refer to 12-2-1.Detail Contents in Request Code. – Outdoor unit-Fan control state Refer to 12-2-1.Detail Contents in Request Code.
  • Page 76 Description Request content Unit Remarks (Display range) Error history 1 (latest) Displays error history. (" --" is displayed if no history is present.) Code Error history 2 (second to last) Displays error history. (" --" is displayed if no history is present.) Code Error history 3 (third to last) Displays error history.
  • Page 77 Description Request content Unit Remarks (Display range) Indoor-Fan operating time 0–9999 1 hour (After filter is reset) Indoor-Total operating time 0–9999 10 hours (Fan motor ON time) Indoor fan output value (Sj value) 0–255 Fan control data – For indoor fan phase control Indoor fan output value "...
  • Page 78 12-2-1. Detail Contents in Request Code [Operation state] (Request code :" 0") Relay output state Power currently Data display Display Compressor Four-way valve Solenoid valve supplied to compressor – – – – Relay output state Operation mode Operation mode Display Operation mode STOP •...
  • Page 79 [Fan control state] (Request code :" 53 ") Data display Fan step correction value by heat sink temperature overheat prevention control Fan step correction value by cool condensation temperature overheat prevention control Display Correction value − (minus) − 1 [Actuator output state] (Request code :"54") Data display Actuator output state 1 Actuator output state 2...
  • Page 80 [Contact demand capacity] (Request code : " 61") Setting content Data display Display Setting value Setting content 100% [External input state] (Request code : "62") Input state : Input present Data display Contact demand Silent mode Spare 1 Spare 2 Display Input state input...
  • Page 81 [Indoor unit – Capacity setting information] (Request code : "163") Data display Display Capacity setting state Display Capacity setting state See the table on the right. 35, 36 [Wireless pair No. (indoor control board side) setting] (Request code :" 165") Data display Display Pair No.

  • Page 82: Easy Maintenance Function

    EASY MAINTENANCE FUNCTION 13-1. SMOOTH MAINTENANCE Refer to "15-9. SMOOTH MAINTENANCE" for operation procedure. Maintenance data, such as the indoor/outdoor unit’s heat exchanger temperature and compressor operation current can be displayed with “Smooth maintenance”. This cannot be executed during test operation. Depending on the combination with the outdoor unit, this may not be supported by some models.
  • Page 83 <Guide for operation condition> Checkpoints Enter the temperature differences between into the graph given below. Operation state is determined according to the plotted areas on the graph. For data measurements, set the fan speed to "Hi" before activat ing maintenance mode. Classification Item Result...

  • Page 84: Disassembly Procedure

    DISASSEMBLY PROCEDURE : Indicates the visible parts in the photos/figures. OPERATING PROCEDURE PHOTOS/FIGURES 1. Removing the service panel and top panel Photo 1 Top panel fixing screws Top panel (1) Remove the service panel fixing screws (4 for front/ 5 x 12), then slide the service panel downward to remove it.
  • Page 85 OPERATING PROCEDURE PHOTOS/FIGURES 3. Removing the electrical parts box Photo 4 (1) Remove the service panel. (See Photo 1) Electrical parts box (2) Remove the top panel. (See Photo 1) Controller (3) Disconnect the power supply cable from terminal block. circuit board (4) Disconnect the indoor/outdoor connecting wire from ter- minal block.
  • Page 86 OPERATING PROCEDURE PHOTOS/FIGURES 4. Disassembling the electrical parts box Photo 5 Controller Cont. base circuit board (C.B.) (1) Disconnect all the connectors on the controller circuit board. (2) To remove the controller circuit board, release it from the support. (3) Remove cont. base fixing screws (2 for front/ 4 x 10) and clip. (Photo 5) (The cont.
  • Page 87 OPERATING PROCEDURE PHOTOS/FIGURES 6. Removing the thermistor <Ambient> (TH7) Photo 11 Sensor holder (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Disconnect the connector TH7/6 (RD) on the controller circuit board in the electrical parts box. (See Photo 4) (4) Loosen the fastener for the lead wire in the electrical parts box.
  • Page 88 OPERATING PROCEDURE PHOTOS/FIGURES 8. Removing the 4-way valve coil (21S4), LEV coil (LEV(A)/ Photo 13 LEV(B)) and lead wire for high pressure switch. High pressure (1) Remove the electrical parts box. (See Photo 4) switch (2) Loosen the clamp for the lead wire on separator. [Removing the lead wire for high pressure switch] (3) Disconnect the lead wire from the high pressure switch.
  • Page 89 OPERATING PROCEDURE PHOTOS/FIGURES 10. Removing the compressor (MC) Photo 14 (1) Remove the electrical parts box. (See Photo 4) Ball valve fixing (2) Remove the cover panel (front). (See Photo 1) Stop valve screws (3) Remove the cover panel (rear). (See Photo 1) fixing screws Valve bed (4) Remove the valve bed.

  • Page 90: Remote Controller

    REMOTE CONTROLLER 15-1. REMOTE CONTROLLER FUNCTIONS <PAR-41MAA> Controller interface The functions of the function buttons change depending on the screen. Refer to the button function guide that appears at the bottom of the LCD for the functions they serve on a given screen. When the system is centrally controlled, the button function guide that corresponds to the locked button will not appear.
  • Page 91 Display The main display can be displayed in two different modes: ˝Full˝ and ˝Basic˝. The initial setting is ˝Full˝. To switch to the ˝Basic˝ mode, change the setting on the Main display setting. (Refer to operation manual included with remote controller.) <Full mode>...
  • Page 92 Menu structure Main menu Press the button. Move the cursor to the desired item with the buttons, and press the button. Operation Vane · 3D i-See · Vent. (Lossnay) High power Comfort Manual vane angle 3D i-See sensor Vertical air direction Horizontal air direction Timer menu Timer...
  • Page 93 Continue from the previous page. Maintenance menu Error information Filter information Cleaning Auto descending panel Descending operation Descending adjustment Service menu Test run menu Test run Drain pump test run Maintenance information Collect model names and serial No. Model name input Serial No.
  • Page 94 Main menu list Main Setting and display items Setting details menu Operation Vane · 3D i-See · Vent. Vane: Use to set the vertical air direction. (Vane.Vent. (Lossnay)) Louver: Use to set the horizontal air direction. 3D i-See sensor: This setting is available only for the air conditioners that support easy setting function of motion sensing air direction.
  • Page 95 Main Setting and display items Setting details menu Initial Basic Main/Sub When connecting 2 remote controllers, one of them needs to be designated as setting setting a sub controller. Clock Use to set the current time. Daylight Set the daylight saving time. saving time Administrator The administrator password is required to make the settings for the following...
  • Page 96 <PAR-SL97A-E> Controller interface Transmission area Transmission indicator Remote controller display Timer indicator *For explanation purposes, all of the items that appear in the display are shown. *All items are displayed when the Reset button is pressed. Operation areas ON/OFF button Temperature setting buttons Fan Speed button (Changes fan speed) Timer Off button...
  • Page 97 <PAR-SL100A-E> Controller interface Transmission area Remote controller display Set Temperature buttons OFF/ON button Mode button (Changes operation mode) Fan Speed button (Changes fan speed) Airflow button (Changes up/ i-see button* down airflow direction) Timer ON button Menu button Timer OFF button SET/SEND button Weekly timer ON/OFF button* CANCEL button...
  • Page 98 15-2. ERROR INFORMATION When an error occurs, the following screen will appear. Check the error status, stop the operation, and consult your dealer. 1. Check code, error unit, refrigerant address, date and time of occur- Error information rence, model name, and serial number will appear. Error code The model name and serial number will appear only if the informa- Error unit...
  • Page 99 • Checking the error information Maintenance menu While no errors are occurring, page 2/2 of the error information can be Error information viewed by selecting ˝Error information˝ from the Maintenance menu. Filter information Errors cannot be reset from this screen. Cleaning Main menu: Cursor...
  • Page 100 15-3. SERVICE MENU Maintenance password is required 1. Select ˝Service˝ from the Main menu, and press the [ ] button. Main Main menu *At the main display, the menu button and select ˝Service˝ to make the maintenance setting. Service 2. When the Service menu is selected, a window will appear asking for the pass- Service menu word.
  • Page 101 15-4. TEST RUN 15-4-1. PAR-41MAA 1. Select ˝Service˝ from the Main menu, and press the [ ] button. Test run Input maintenance info. Settings Check Select ˝Test run˝ with the F1 or F2 button, and press the [ Others ] button. 2.
  • Page 102 15-4-2. PAR-SL97A-E Measure an impedance between the power supply terminal block on the outdoor unit and ground with a 500 V Megger and check that it is equal to or greater than 1.0 MΩ. TEST RUN 1. Turn on the main power to the unit. TEST RUN 2.
  • Page 103 15-5. FUNCTION SETTING 15-5-1. PAR-41MAA Settings menu 1. Select ˝Service˝ from the Main menu, and press the [ ] button. Function setting Rotation setting Select ˝Setting˝ from the Service menu, and press the [ ] button. Service menu: Select ˝Function setting˝, and press the [ ] button.
  • Page 104 Pattern 2 Function setting Ref. address Grp. (1/8) 4. Toggle through the pages with the F3 or F4 button. Mode 1 Mode 2 Mode 3 5. Select the mode number with the F1 or F2 button, and then press the [ Mode 4 button.
  • Page 105 15-5-2. PAR-SL97A-E Functions can be selected with the wireless remote controller. Function selection using wireless remote controller is available only for refriger- ant system with wireless function. Refrigerant address cannot be specified by the wireless remote controller. [Flow of function selection procedure] Flow of function selection procedure The flow of the function selection procedure is shown below.
  • Page 106 15-5-3. PAR-SL100A-E 1. Going to the function select mode Press the button between of 5 seconds. (Start this operation from the status of remote controller display turned off.) [CHECK] is lit and ˝00˝ blinks. (Fig. 1) Press the button to set the ˝50˝. Direct the wireless remote controller toward the receiver of the indoor unit and press the button.
  • Page 107 15-6. ERROR HISTORY 1. Select ˝Service˝ from the Main menu, and press the [ ] button. Test run Input maintenance info. Settings Check Others Select ˝Check˝ with the F1 or F2 button, and press the [ button. Select ˝Error history˝ with the F1 or F2 button, and press the [ ] button.
  • Page 108 5. Preliminary error history Preliminary error history Error Unt# dd/mm/yy Select "Preliminary error history" from the Error history menu, and press the [ ] button. 32 preliminary error history records will appear. Error history menu: Page Delete 4 records are shown per page, and the top record on the first page indi- cates the latest error record.
  • Page 109 15-7. SELF-DIAGNOSIS 15-7-1. PAR-41MAA 1. Select ˝Service˝ from the Main menu, and press the [ ] button. Diagnosis Self check Select ˝Check˝ from the Service menu, Remote controller check and press the [ ] button. Service menu: Select ˝Diagnosis˝ from the Check menu, Cursor and press the [ ] button.
  • Page 110 15-7-2. PAR-SL97A-E When a malfunction occurs to air conditioner, both indoor unit and outdoor unit will stop and operation lamp blinks to inform unusual stop. < Malfunction-diagnosis method at maintenance service> Refrigerant [Procedure] address display 1. Press the CHECK button twice. CHECK •...
  • Page 111 15-8. REMOTE CONTROLLER CHECK If operations cannot be completed with the remote controller, diagnose the remote controller with this function. 1. Select ˝Service˝ from the Main menu, Diagnosis and press the [ ] button. Self check Remote controller check Select ˝Check˝ from the Service menu, and press the [ ] button.
  • Page 112 15-9. SMOOTH MAINTENANCE 1. Select ˝Service˝ from the Main menu, and press the [ ] button. Check menu Error history Diagnosis Smooth maintenance Request code Select ˝Check˝ with the F1 or F2 button, and press the [ ] button. Service menu: Cursor Select ˝Smooth maintenance˝...
  • Page 113 ■ Refrigerant address Single refrigerant system Multi refrigerant system (group control) In the case of single refrigerant system, the refrigerant address Up to 16 refrigerant systems (16 outdoor units) can be con- is ˝00˝ and no operation is required. nected as a group by 1 remote controller. To check or set the Simultaneous twin, triple units belong to this category refrigerant addresses.
  • Page 114 HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN CCopyright 2021 MITSUBISHI ELECTRIC CORPORATION Published: Sep. 2021 No.OCH775 Made in Japan Specifications are subject to change without notice.

This manual is also suitable for:

Puz-m250yka2

Table of Contents