Mitsubishi Electric PUHY-P200 Service Handbook
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Mitsubishi Electric PUHY-P200 Service Handbook

City multi
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AIR CONDITIONERS CITY MULTI
PUHY-P200, P250, P300, P350, P400YGM-A
Models
PUHY-P450, P500, P550, P600, P650YGM-A
PUY-P200, P250, P300, P350YGM-A
Service Handbook

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Summary of Contents for Mitsubishi Electric PUHY-P200

  • Page 1 AIR CONDITIONERS CITY MULTI PUHY-P200, P250, P300, P350, P400YGM-A Models PUHY-P450, P500, P550, P600, P650YGM-A PUY-P200, P250, P300, P350YGM-A Service Handbook...

  • Page 2: Table Of Contents

    [4] Switching to the built-in Thermo on the remote controller ..54 5 Electrical Wiring Diagram ............55 [1] PUHY-P200, P250, P300, P350, P400YGM-A / PUY-P200, P250, P300, P350YGM-A .. 55 [2] PUHY-P450, P500, P550, P600, P650YGM-A ......56 [3] Power Dispatching Extension Unit for the Transmission Lines ..57 6 Refrigerant Circuit ................

  • Page 3: Safety Precautions

    Safety Precautions Before installing the unit, be sure to carefully read all of the following safety precautions. These precautions provide important information regarding safety. Be sure to follow them to ensure safety. Symbols used in the text Warning: Failure to follow all instructions may result in serious personal injury or death. Caution: Failure to follow all instructions may result in personal injury or damage to the unit.
  • Page 4 Warning : Carefully read the labels affixed to the main unit. When installing the unit in a small room, safeguard Do not touch the fins on the heat exchanger with against hypoxia that results from leaked refrigerant bare hands: they are sharp and dangerous. reaching the threshold level.

  • Page 5: Before Installing The Unit

    Caution Store the piping to be used during installation Do not use a charging cylinder. indoors, and keep both ends of the piping sealed • The use of charging cylinder will change the until immediately before brazing. (Keep elbows and composition of the refrigerant and lead to power other joints wrapped in plastic.) loss.
  • Page 6 Before Installing (Relocating) the Unit or Performing Electric Work Caution Ground the unit. Use breakers and fuses (electrical current breaker, remote switch <switch + Type-B fuse>, molded • Do not connect the grounding on the unit to gas case circuit breaker) with a proper current pipes, water pipes, lightning rods, or the grounding capacity.
  • Page 7 Before the Test Run Caution Turn on the unit at least 12 hours before the test Do not turn off the power immediately after run. stopping the unit. • Keep the unit on throughout the season. • Allow for at least five minutes before turning off the Turning the unit off during the season may cause unit;...

  • Page 8: Read Before Servicing

    ¡ ¡ Read Before Servicing [1] Items to Be Checked 1. Verify the type of refrigerant used by the unit to be serviced. Refrigerant Type : R410A 2. Check the symptom exhibited by the unit to be serviced. Look in this service handbook for symptoms relating to the refrigerant cycle. 3.

  • Page 9: Necessary Tools And Materials

    [2] Necessary Tools and Materials Prepare the following tools and materials necessary for installing and servicing the unit. [Necessary tools for use with R410A (Adaptability of tools that are for use with R22 and R407C)] 1. To be used exclusively with R410A (not to be used if used with R22 or R407C) Tools/Materials Notes Gauge Manifold...

  • Page 10: Piping Materials

    [3] Piping Materials Do not use the existing piping! New Piping Existing Piping <Types of copper pipe> Type-O pipes Soft copper pipes (annealed copper pipes) They can be bent easily with hands. Type-1/2H pipes Hard copper pipes (straight pipes) Stronger than type-O pipes of the same radial thickness. •...
  • Page 11 <Indication of the radial thickness and refrigerant type on the piping materials> “Radial thickness” and “Refrigerant Types” are indicated on the insulation material on the piping materials for the new refrigerant. Indication of the radial thickness (mm) Indication of the refrigerant type Radial thickness Symbols Refrigerant type...

  • Page 12: Storage Of Piping Material

    [4] Storage of Piping Material 1. Storage location Store the pipes to be used indoors. (Warehouse at site or owner’s warehouse) Storing them outdoors may cause dirt, waste, or water to infiltrate. 2. Pipe sealing before storage Both ends of the pipes should be sealed until immediately before brazing. Wrap elbows and T’s in plastic bags for storage.

  • Page 13: Piping Machining

    [5] Piping Machining Use ester oil, ether oil or alkylbenzene (small amount) as the refrigerator oil to coat flares and flange connections. Reason : 1. The refrigerator oil used for the equipment is highly hygroscopic and may introduce water inside. Notes : •...

  • Page 14: Brazing

    [6] Brazing No changes from the conventional method, but special care is required so that foreign matter (ie. oxide scale, water, dirt, etc.) does not enter the refrigerant circuit. Example : Inner state of brazed section When non-oxide brazing was not used When non-oxide brazing was used Items to be strictly observed : 1.

  • Page 15: Airtightness Test

    [7] Airtightness Test No changes from the conventional method. Note that a refrigerant leakage detector for R22 or R407C cannot detect R410A leakage. Halide torch R22 or R407C leakage detector Items to be strictly observed : 1. Pressurize the equipment with nitrogen up to the design pressure and then judge the equipment’s airtightness, taking temperature variations into account.

  • Page 16: Vacuum Drying

    Vacuum Drying Photo 1 15010H Photo 2 14010 Recommended vacuum gauge : ROBINAIR 14010 Thermistor Vacuum Gauge 1. Vacuum pump with reverse-flow check valve (Photo 1) To prevent vacuum pump oil from flowing back into the refrigerant circuit upon turning off the vacuum pump’s power source, use a vacuum pump equipped with a reverse flow check valve.

  • Page 17: Changing Refrigerant

    [10] Changing Refrigerant R410A must be in a liquid state when charging. For a cylinder with a syphon attached For a cylinder without a syphon attached Cylin- Cylin- Cylinder color identification R407C-Gray Charged with liquid refrigerant R410A-Pink Valve Valve Liquid Liquid Reasons : R410A is a pseudo-azeotropic refrigerant (boiling point R32 = -52˚C, R125 = -49˚C) and can roughly be handled...

  • Page 18: Characteristics Of The Conventional And The New Refrigerants

    [12] Characteristics of the Conventional and the New Refrigerants 1. Chemical property As with R22, the new refrigerant (R410A) is low in toxicity and a chemically stable non-flammable refrigerant. However, because the specific gravity of steam is greater than that of air, leaked refrigerant in a closed room will accumulate at the bottom of the room and may cause hypoxia.

  • Page 19: Notes On Refrigerating Machine Oil

    [13] Notes on Refrigerating Machine Oil 1. Refrigerating Machine Oil in the HFC Refrigerant System HFC type refrigerants use a refrigerating machine oil different from that used in the R22 refrigerant system. Please note that the ester oil sealed in the unit is not the same as commercially available ester oil. Refrigerant Refrigerating machine oil Mineral oil...

  • Page 20: Restrictions

    ™ ™ Restrictions [1] Electrical Work & M-NET control 1. Attention ➀ Follow ordinance of your governmental organization for technical standard related to electrical equipment, wiring regulations, and guidance of each electric power company. ➁ Wiring for control (hereinafter referred to as transmission line) shall be (5cm or more) apart from power source wiring so that it is not influenced by electric noise from power source wiring.

  • Page 21: Types Of Switch Setting And Address Setting

    [2] Types of Switch Setting and Address Setting 1. Switch setting Type and method of switch setting Switch setting vary depending on the system configuration. Make sure to read “[3] Examples of system connection” before conducting electrical work. Turn off the power before setting the switch. Operating the switch while the unit is being powered will not change the setting, and the unit will not properly function.
  • Page 22 Setting the power supply selecting connector for the outdoor unit (Factory setting: CN41 is connected.) System Connection with Power supply unit Grouping operation The setting of the power supply Configuration the system for the of different selecting connector controller transmission lines refrigerant systems Single refrigerant system...

  • Page 23: Examples Of System Connection

    [3] Examples of system connection 1. System using MA remote controller (1) In the case of single refrigerant system (Automatic address set-up) Control wiring example Interlocking with ventilation Group Group TB15 TB15 M1M2 M1M2 M1M2 M1M2 M1M2 A1 B2 A1 B2 A1 B2 Group Group...
  • Page 24 Wiring method Address setting method • a. Indoor/outdoor transmission line Apply jumper wiring connection between M1, M2 terminals of the indoor/outdoor transmission line terminal block (TB3) on the outdoor unit (OC) and that of indoor/outdoor transmission line terminal block (TB5) on each indoor unit (IC).
  • Page 25 1. System using MA remote controller (2) In the case of single refrigerant system connecting 2 or more LOSSNAY units (Manual address set-up) Control wiring example Interlocking with ventilation Group Group TB15 TB15 M1M2 M1M2 M1M2 M1M2 M1M2 A1 B2 A1 B2 Group TB15...
  • Page 26 Wiring method Address setting method • a. Indoor/outdoor transmission line The same as 1. (1) Connection of shielded wire: The same as 1. (1) b. Centralized control transmission line No connection is required. c. MA remote controller wiring The same as 1. (1) For 2-remote controller operation: The same as 1.
  • Page 27 1. System using MA remote controller (3) In the case of different refrigerant grouping operation Control wiring example Interlocking with ventilation CN41→CN40 Replace Group Group TB15 TB15 M1M2 M1M2 M1M2 M1M2 M1M2 Connect A1 B2 A1 B2 Leave CN41 as it is. Group TB15 TB15...
  • Page 28 Wiring method Address setting method • a. Indoor/outdoor transmission line Apply jumper wiring connection between M1, M2 terminals of the indoor/outdoor transmission line terminal block (TB3) on the outdoor unit (OC) and that of indoor/outdoor transmission line terminal block (TB5) on each indoor unit (IC).
  • Page 29 1. System using MA remote controller (4) In the case of connecting system controller to centralized control transmission line Control wiring example Interlocking with ventilation CN41→CN40 Replace SW2-1 OFF→ON Note 1 Group Group TB15 TB15 M1M2 M1M2 M1M2 M1M2 M1M2 A1 B2 A1 B2 Leave CN41 as it is.
  • Page 30 Wiring method Address setting method • a. Indoor/outdoor transmission line The same as 1. (3) Connection of shielded wire: The same as 1. (1) b. Centralized control transmission line Apply jumper wiring between M1, M2 terminals of centralized control transmission line terminal blocks (TB7) on each OC.
  • Page 31 1. System using MA remote controller (5) In the case of connecting system controller to indoor/outdoor transmission line (excluding LM adaptor) Control wiring example Interlocking with ventilation CN41→CN40 Replace SW2-1 OFF→ON Group Group TB15 TB15 M1M2 M1M2 M1M2 M1M2 M1M2 Connect A1 B2 A1 B2...
  • Page 32 Wiring method Address setting method • a. Indoor/outdoor transmission line Apply jumper wiring connection between M1, M2 terminals of the indoor/outdoor transmission line terminal block (TB3) on the outdoor unit (OC) and that of indoor/outdoor transmission line terminal block (TB5) on each indoor unit (IC).
  • Page 33 2. System Using the M-NET Remote Controller (1) System with the system controller connected to the transmission lines for centralized control Control wiring example Interlocking with ventilation CN41→CN40 Replace SW2-1 OFF→ON Note 1 Group Group TB15 TB15 M1M2 M1M2 M1M2 M1M2 M1M2 Connect...
  • Page 34 Wiring method Address setting method • a. Indoor/outdoor transmission line The same as 1. (3) Connection of shielded wire: The same as 1. (1) b. Centralized control transmission line The same as 1. (4) Connection of shielded wire: The same as 1. (4) c.
  • Page 35 3. System where MA remote controller and M-NET remote controller coexist Control wiring example CN41→CN40 Replace SW2-1 OFF→ON Note 1 Group Group TB15 TB15 TB15 M1M2 M1M2 M1M2 M1M2 M1M2 A1 B2 A1 B2 Leave CN41 as it is. SW2-1 OFF→ON Note 1 Group Group...
  • Page 36 Wiring method Address setting method • a. Indoor/outdoor transmission line The same as 1. (3) Connection of shielded wire: The same as 1. (1) b. Centralized control transmission line The same as 1. (4) Connection of shielded wire: The same as 1. (4) c-1.

  • Page 37: Restrictions On Refrigerant Piping Length

    [4] Restrictions on Refrigerant Piping Length For the piping connection, the end branching system is applied where the end of refrigerant piping from the outdoor unit is branched and connected to each indoor unit. As the piping connection method, the indoor unit is applied with flare connec- tion, outdoor unit gas piping is flange connection, and liquid piping is flare connection.
  • Page 38 2. Header branching system Outdoor unit Note: The branch piping can not be branched again after header branching. First branch Indoor Indoor Indoor Indoor Indoor Indoor Item Piping section Allowable value Total piping length A + a + b + c + d + e + f Less than 300m Length Farthest piping length (L)

  • Page 39: Components Of The Outdoor Unit

    £ £ Components of the Outdoor Unit [1] Appearance of the Components and Refrigerant Circuit < P200, P250, P300, P350-Types > [ Front view of the unit ] Fan guard Heat exchanger [ Rear view of the unit ] Fan guard Heat exchanger - 37 -...
  • Page 40 < P200, P250, P300, P350-Types > [ Front view of the refrigerant circuit ] High-pressure check joint High-pressure pressure sensor Pressure switch Discharge muffler 4-way valve Accumulator (21S4a) Inverter Drier compressor Low-pressure check joint Gas-side ball valve Liquid-side ball valve [ Rear view of the refrigerant circuit ] Linear expansion 4-way valve...
  • Page 41 < P400-type > Fan guard [ Front view of the unit ] Heat exchanger [ Rear view of the unit ] Fan guard Heat exchanger - 39 -...
  • Page 42 < P400-type > [ Front view of the refrigerant circuit ] High-pressure High-pressure 4-way valve 4-way valve Low-pressure pressure sensor check joint (21S4b) (21S4c) pressure sensor Discharge Pressure muffler switch 4-way valve Accumulator (21S4a) Inverter compressor Drier Gas-side ball valve Liquid-side Low-pressure ball valve...
  • Page 43 < P450, P500, P550, P600, P650-Types > [ Front view of the unit ] Fan guard Heat exchanger [ Rear view of the unit ] Fan guard Heat exchanger - 41 -...
  • Page 44 < P450, P500, P550, P600, P650-Types > [ Front view of the refrigerant circuit ] Oil separator (No.1) Oil separator (No.2) Pressure switch Accumulator Inverter compressor (No.1) Oil balancer tube Commercial power supply compressor (No.2) [ Rear view of the refrigerant circuit ] (Rear) (Front) High-pressure...

  • Page 45: Control Box

    [2] Control Box < P200~P400-Types > [ Appearance ] Main board INV board Transmission line terminal block Choke coil for centralized control (L1, L2) (TB7) Transformer Indoor/outdoor transmission terminal block Power supply terminal (TB3) block (TB1) [ Under the circuit board cover ] ACCT-U phase ACCT-W phase DCL (back)
  • Page 46 < P450~P650-Types > [ Appearance ] RELAY board INV board Main board Transmission line terminal block for centralized control (TB7) FILTER board Indoor/outdoor transmission Choke coil terminal block (L1, L2) Transformer Power supply terminal (TB3) block (TB1) [ Under the circuit board cover ] Gate amp board DCL (back) (G/A board)

  • Page 47: Circuit Board

    [3] Circuit Board 1. Main board CNRS3B CNRS3A CNS1 CNS2 CN40 CN41 CN38 CNVCC1 Controlled source input CNRT1 – DC30V – DC30V CN52C – DC7V Control for – DC12V 52C1 – DC7V CN51 – Compressor ON/OFF – Trouble CN3N CN3D CN3S CNOUT1 CNAC3...
  • Page 48 2. INV board CNVDC CN15V2 Power supply for IPM control CNVCC1 Power supply – DC30V – DC30V – DC7V – DC12V CN52C – DC7V CNDR2 CNAC2 Power Source CNCT CNTH CNFAN CNRS1 CNRS2 CNCT2 Serial transmission for MAIN board - 46 -...
  • Page 49 3. FAN board CNVDC CNINV Fan motor output DC bus voltage input Fuse CNRS2 – LED1 LED2 IPM (back) CNTR 4. Relay board CNRT2 – 52C2, 52F, CH12 Power input (AC220~240V) CN51C2 CNOUT2 – 51C2 51C2 contact input Relay driving input Detection output CN52C2 52C2...
  • Page 50 5. Filter board CNOUT CNIN Controlled Controlled CNFG source output CNL1 CNL2 source input 6. G/A board CNDC1 CNDC2 CN15V1 CNIPM1 CNDR1 - 48 -...

  • Page 51: Remote Controller

    ¢ ¢ Remote Controller [1] Functions and Specifications of MA and ME Remote Controllers There are two types of remote controllers: M-NET (ME) remote controller, which is connected on the indoor/outdoor transmission line, and MA remote controller, which is connected to each indoor unit.

  • Page 52: Group Setting And Interlocking Settings That Are Made On The Me Remote Controller

    [2] Group Setting and Interlocking Settings that are Made on the ME Remote Controller 1. Group setting/interlocking setting This operation should be performed to set a group of indoor units between different refrigerant systems and to manually raise the indoor/outdoor unit addresses.
  • Page 53 Repeat steps 7 and 8 above to interlock all the indoor units in a group with the LOSSNAY. (C) Returning to the normal state When all the group registration and interlock registration operations To return to the normal state, To confirm the addresses, go are completed, return to the normal state as described below.
  • Page 54 (A) Deleting group registration information (B) When deleting interlocked registration <When completed normally> When deletion was completed normally, “ ” is displayed at the unit type display. If a deletion error occurred, (Alternate display) “ ” is displayed at the room temperature display. “...

  • Page 55: Interlocking Setting That Is Made On The Ma Remote Controller

    [PROCEDURE] 1. Set the air conditioner to the off state with the remote controller [ON/OFF] button. The remote controller display shifts to the OFF window display shown at the left. 2. When the [CHECK] and [Mode selection] buttons 1 are pressed and held down at the same time for two seconds, the remote controller switches to the remote controller function selection mode and the “OPERATION MODE DISPLAY SELECTION MODE”...

  • Page 56: Switching To The Built-In Thermo On The Remote Controller

    3 Registration confirmation result - The indoor unit address and registered LOSSNAY address are displayed alternately. FUNCTION FUNCTION <Indoor unit address and indoor unit display> <LOSSNAY address display and LOSSNAY display> - When LOSSNAY are not registered FUNCTION 4 If registration is unnecessary, end registration by pressing and holding down the B [FILTER] and c [Louver] buttons at the same time for two seconds.

  • Page 57: Electrical Wiring Diagram

    ∞ ∞ Electrical Wiring Diagram PUHY-P200, P250, P300, P350, P400YGM-A / PUY-P200, P250, P300, P350YGM-A - 55 -...

  • Page 58: Puhy-P450, P500, P550, P600, P650Ygm-A

    PUHY-P450, P500, P550, P600, P650YGM-A - 56 -...

  • Page 59: Power Dispatching Extension Unit For The Transmission Lines

    Power Dispatching Extension Unit for the Transmission Lines - 57 -...

  • Page 60: Refrigerant Circuit

    § § Refrigerant Circuit [1] Refrigerant Circuit Diagram < PUHY-P200, P250, P300, P350YGM-A > - 58 -...
  • Page 61 < PUY-P200, P250, P300, P350YGM-A > - 59 -...
  • Page 62 < PUHY-P400YGM-A > - 60 -...
  • Page 63 < PUHY-P450, P550, P600, P650YGM-A > - 61 -...

  • Page 64: Functions Of Principal Parts

    Functions of Principal Parts 1. Outdoor Unit Symbol Name Notes Function Specification Check method (function) Compres- Adjusts the volume of circulating re- (P200-type) frigerant by controlling the operating High-pressure shell scroll type frequency with the operating pres- Winding resistance sure. 20˚C : 0.72Ω...
  • Page 65 Symbol Name Notes Function Specification Check method (function) 1 High/low pressure bypass at Solenoid AC220~240V Continuity check valve Discharge- starting and stopping, and capacity Open when energized with a tester suction bypass control during low-load operation Closed when not energized 2 High-pressure rise suppression P450-P650 Provides compressor protection...

  • Page 66: Control

    ¶ ¶ Control [1] Dip Switch Functions and Their Factory Settings 1. Outdoor unit (1) Main board Function according to switch setting Switch setting timing Switch Function Unit address setting Set to 00 or 51-100 with the dial switch Before power on SW1 1~10 For self-diagnosis/operation Refer to the LED monitor display on the outdoor unit board Anytime after power on...
  • Page 67 DipSW5-1 DipSW3-9 Standard specification Standard specification High-static pressure High-static pressure (60Pa) specification (30Pa) specification (2) INV board Function according to switch setting Switch setting timing Switch Function Enabling/disabling the following error Error detection enabled Error detection disabled Anytime after power on detection functions: ACCT, DCCT sensor circuit error (530X Detail No.
  • Page 68 2. Indoor unit DIP SW1, 3 Function according to switch operation Switch set timing Switch Function Remarks Room temp. sensor position Indoor unit inlet Built in remote controller Clogged filter detect. None Provided Filter duration 100h 2500h Always ineffective for PKFY-P.VAM OA intake Ineffective Effective...
  • Page 69 Setting of DIP SW5 220V 240V ON : 220V 230V OFF : 240V (PLFY-P·VLMD-E) Switch Function Operation by switch Switch set timing (PCFY-P-VGM-E) Ceiling height Ceiling height Always after powering 3.5m setting 2.8m 2.3m (PDFY-P20 ~ 80VM-E, PEFY-P20 ~ 80VMM-E) 100Pa 50Pa External static...
  • Page 70 3. Remote controller (1) MA remote controller (PAR-20MAA) Removing the cover shows switches at the lower part of the remote controller unit. By operating these switches, the remote controller main/sub, and other function will be set. In normal case, do not change the setting except No.1 switch used to set the main/sub. (All setting at factory shipment are "ON."...

  • Page 71: Controlling The Outdoor Unit

    [2] Controlling the Outdoor Unit 1. Initial control • When the power is turned on, the initial processing of the microcomputer is given top priority. • During the initial processing, control processing of the operation signal is suspended. The control processing is resumed after the initial processing is completed.
  • Page 72 4. Frequency control • Depending on the capacity required, the frequency of the compressor is controlled to keep constant the evap- oration temperature (0˚C = 0.71MPa) during cooling operation and condensing temperature (49˚C = 2.88MPa) during heating operation. • The capacity of the P200-P400 is controlled solely by the inverter-driven compressor, and the capacity of P450-P650 is controlled by No.1 and No.2 compressors.
  • Page 73 5. Defrost operation control (1) Starting the defrost operation • Defrost operation is started when the pipe temperature (TH5) of -10˚C or below (-8˚C or below for P400- type and above) has continuously been detected for 3 minutes after the integrated compressor operation time of 50 minutes have passed.
  • Page 74 6. Refrigerant recovery control • Recovery of refrigerant is performed during heating operation to prevent the refrigerant from accumulating inside the unit while it is stopped (unit in fan mode), or inside the indoor unit that is in cooling mode or in heat- ing mode with thermo off.
  • Page 75 (3) Patterns of outdoor unit heat exchanger capacity control [P200-P350types] [P400-P650types] Operation Heat exchanger Inverter Operation Heat exchanger Number Inverter Remarks Remarks mode capacity control mode capacity of fans control 21S4b ON 21S4b, 21S4c ON 5~100% 5~100% SV5b SV5b, SV5c Cooling 21S4b OFF 21S4b ON, 21S4c OFF...
  • Page 76 < Initial start-up control of P450-P650 type units: Time chart > [Example1] Completion of initial start up operation 40 minutes 5 minutes No.1 compressor ON/OFF No.2 compressor ON/OFF Step 1 Step 3 10. Emergency operation mode (P450-P650 types only) Emergency operation mode is an operation that the unit runs on a first-aid basis when problems occur with the compressors (No.1, No.2).
  • Page 77 11. Operation mode (1) Indoor unit operation modes An operation mode can be selected from the following 5 modes on the remote controller. Cooling mode Heating mode Dry mode Fan mode Stopping mode (2) Outdoor unit operation mode Cooling mode All indoor units in operation are in cooling mode.

  • Page 78: Operation Flow Chart

    [3] Operation Flow Chart 1. Flow to determine the mode (1) Indoor unit (cooling, heating, dry, fan mode) Normal operation Trouble observed Start Stop Breaker turned on From outdoor unit Operation SW turned on 1. Protection function self-holding Note: ❉1 cancelled.
  • Page 79 (2) Outdoor unit (cooling, heating mode) Normal operation Start Trouble observed Stop Breaker turned on Note: ❉1 “HO” blinks on the remote controller Set indoor address No. to remote controller From outdoor unit Operation command 1. Protection function self- holding cancelled 2.
  • Page 80 2. Operation under each mode (1) Cooling operation Normal operation Cooling operation Trouble observed Stop 4-way valve OFF Indoor unit fan Note: ❉1 operations Test run start Thermostat 3-minute restart preven- tion 1. Inverter output 0Hz 1. Inverter frequency control 2.
  • Page 81 (2) Heating operation Normal operation Trouble observed Stop Test run Heating operation Note: ❉1, 2 Defrost operation 4-way valve OFF 4-way valve OFF 1. Indoor unit fan stop 2. Inverter defrost frequency Test run start control 3. Indoor unit LEV fully closed 4.
  • Page 82 (3) Dry operation Normal operation Dry operations Trouble observed Stop 4-way valve OFF Test run start Note: ❉2 Thermostat ON Inlet temp. ≥ 18°C Note: ❉1 1. Outdoor unit (Compressor) 1. Indoor unit fan stop intermittent operations 2. Inverter output 0Hz 2.

  • Page 83: Test Run

    • • Test Run [1] Check Items before Test Run Check refrigerant leak, loose power source or transmission line if found. Measure resistance between the power source terminal block and ground with a 500V megger to confirm it is exceeding 1.0MΩ. Notes: 1.

  • Page 84: Operating Characteristics And Refrigerant Amount

    [3] Operating Characteristics and Refrigerant Amount Clarify relationship between the refrigerant amount and operating characteristics of CITY MULTI new refrigerant series, and perform service activities such as decision and adjustment of refrigerant amount on the market. 1. Operating characteristics and refrigerant amount The followings are operating characteristics and refrigerant amount which draw special attention.
  • Page 85 3. Amount of additional refrigerant to be charged At the time of shipping from the factory, the outdoor unit is charged with the amount of refrigerant shown in the following table, but since no extension piping is included, please carry out additional charging on-site. Outdoor unit model name P200 P250...

  • Page 86: Refrigerant Volume Adjustment Mode Operation

    [5] Refrigerant Volume Adjustment Mode Operation Since the refrigerant volume adjustment introduced in this chapter is just for emergency need, correct adjustment to meet the rated refrigerant volume is difficult. Please judge for adequate volume by following the flow chart later under normal operation mode.
  • Page 87 [ Refrigerant Adjustment Method ] Start SW2-4 ON All indoor units are run in ❉ Refer to the previous page for Notes 1 test cooling mode through 4. Has the initial start-up mode been completed? Minimum of 30 minutes continuous operation Add a small amount of refriger- Is TH11 ≤...

  • Page 88: Symptoms That Do Not Signify Problems

    [6] Symptoms that do not Signify Problems Symptom Remote controller display Cause Indoor unit does not run while oper- "COOL (HEAT)" Unable to execute cooling (heating) operation while ating for cooling (heating). blinking display other indoor unit is under cooling (heating) operation. Auto-vane runs freely.

  • Page 89: Standard Operation Data (Reference Data)

    [7] Standard Operation Data (Reference Data) 1. Cooling operation [Standard type] Outdoor unit PU(H)Y-P200 PU(H)Y-P250 PU(H)Y-P300 Items Indoor 27.0/19.0 27.0/19.0 27.0/19.0 Ambient temp. DB/WB Outdoor 35.0/24.0 35.0/24.0 35.0/24.0 Quantity Indoor unit Quantity in operation Model – Condition Main pipe Piping Branch pipe Total piping length Indoor unit fan notch...
  • Page 90 Outdoor unit PU(H)Y-P350 PUHY-P400 PUHY-P450 Items Indoor 27.0/19.0 27.0/19.0 27.0/19.0 Ambient temp. DB/WB Outdoor 35.0/24.0 35.0/24.0 35.0/24.0 Quantity Indoor unit Quantity in operation Model – 140 125 200 100 200 125 Condition Main pipe Piping Branch pipe Total piping length Indoor unit fan notch –...
  • Page 91 Outdoor unit PUHY-P500 PUHY-P550 Items Indoor 27.0/19.0 27.0/19.0 Ambient temp. DB/WB Outdoor 35.0/24.0 35.0/24.0 Quantity Indoor unit Quantity in operation Model – Condition Main pipe Piping Branch pipe Total piping length Indoor unit fan notch – Refrigerant volume 22.1 28.1 Total current 26.3/24.0 28.8/26.4...
  • Page 92 Outdoor unit PUHY-P600 PUHY-P650 Items Indoor 27.0/19.0 27.0/19.0 Ambient temp. DB/WB Outdoor 35.0/24.0 35.0/24.0 Quantity Indoor unit Quantity in operation Model – Condition Main pipe Piping Branch pipe Total piping length Indoor unit fan notch – Refrigerant volume 28.3 29.3 Total current 29.6/27.1 33.1/30.3...
  • Page 93 2. Heating operation [Standard type] Outdoor unit PUHY-P200 PUHY-P250 PUHY-P300 Items Indoor 20.0/- 20.0/- 20.0/- Ambient temp. DB/WB Outdoor 7.0/6.0 7.0/6.0 7.0/6.0 Quantity Indoor unit Quantity in operation Model – Condition Main pipe Piping Branch pipe Total piping length Indoor unit fan notch –...
  • Page 94 Outdoor unit PUHY-P350 PUHY-P400 PUHY-P450 Items Indoor 20.0/- 20.0/- 20.0/- Ambient temp. DB/WB Outdoor 7.0/6.0 7.0/6.0 7.0/6.0 Quantity Indoor unit Quantity in operation Model – 140 125 200 100 200 125 Condition Main pipe Piping Branch pipe Total piping length Indoor unit fan notch –...
  • Page 95 Outdoor unit PUHY-P500 PUHY-P550 Items Indoor 20.0/- 20.0/- Ambient temp. DB/WB Outdoor 7.0/6.0 7.0/6.0 Quantity Indoor unit Quantity in operation Model – Condition Main pipe Piping Branch pipe Total piping length Indoor unit fan notch – Refrigerant volume 22.1 28.1 Total current 26.8/24.5 27.6/25.3...
  • Page 96 Outdoor unit PUHY-P600 PUHY-P650 Items Indoor 20.0/- 20.0/- Ambient temp. DB/WB Outdoor 7.0/6.0 7.0/6.0 Quantity Indoor unit Quantity in operation Model – Condition Main pipe Piping Branch pipe Total piping length Indoor unit fan notch – Refrigerant volume 28.3 29.3 Total current 29.9/27.4 33.4/30.6...

  • Page 97: Troubleshooting

    ª ª Troubleshooting [1] Check Code List 1. Check Code List Check code Check content [01] 0403 Serial transmission abnormality (Note1) [05] 0900 Test run (LC) 1102 Discharge temperature abnormality 1301 Low pressure abnormality (OC) 1302 High pressure abnormality (OC) 1500 Overcharged refrigerant abnormality 2500...
  • Page 98 Check code Check content 5301 [115] ACCT sensor abnormality 5305 [116] DCCT sensor abnormality [117] ACCT sensor/circuit abnormality (Note1) [118] DCCT sensor/circuit abnormality [119] IPM-open/ACCT connection abnormality [120] ACCT miss-wiring abnormality 6600 Multiple address abnormality 6601 Unset polarity 6602 Transmission processor hardware abnormality 6603 Transmission circuit bus-busy abnormality 6606...
  • Page 99 2. Intermittent fault check code (only for outdoor unit) Preliminary error code Preliminary error content 1202 (1102) Preliminary discharge temperature abnormality or preliminary discharge thermal sensor abnormality (TH11) 1205 (5105) Preliminary liquid pipe temperature sensor abnormality (TH5) 1214 (5110) [00] Preliminary THHS sensor/circuit abnormality [05] (Note1)

  • Page 100: Responding To Error Display On The Remote Controller

    [2] Responding to Error Display on the Remote Controller 1. Mechanical problems Checking code Meaning, detecting method Cause Checking method & Countermeasure 0403 Serial Serial transmission failure (1) Defective wiring. Check for wiring between the transmission between the main board and the main board connector CNRS3B abnormality INV board, and between the...
  • Page 101 Checking code Meaning, detecting method Cause Checking method & Countermeasure 1301 Low pressure When starting the compressor (1) Internal pressure is dropping Refer to the item on judging low abnoramlity from Stop Mode for the first time due to a gas leak. pressure pressure sensor failure.
  • Page 102 Checking code Meaning, detecting method Cause Checking method & Countermeasure 1302 High pressure When pressure sensor detects (1) Fall in internal pressure See Trouble check of pressure abnoramlity 2 0.098MPa or less just before caused by gas leak. sensor. (Outdoor unit) starting of operation, error stop (2) Pressure sensor trouble.
  • Page 103 Checking code Meaning, detecting method Cause Checking method & Countermeasure 2502 Drain pump When drain sensor detects (1) Drain pump malfunction (1) Check the drain pump abnormality flooding during drain pump ON. malfunction 1Check whether there is (This error (2) Clogged drain pump intake occurs only water in the drain pan.
  • Page 104 Checking code Meaning, detecting method Cause Checking method & Countermeasure 2502 Drain pump When drain sensor detects (1) Drain pump malfunction Refer to the previous page. abnormality flooding during drain pump ON (This error in the stopped indoor unit. (2) Clogged drain pump intake <Error release method>...
  • Page 105 Checking code Meaning, detecting method Cause Checking method & Countermeasure 4103 Reverse 1. The operation cannot be (1) Faulty wiring · Check whether the phase of phase started because of the the power supply terminal abnormality reserve phase of one of the block (TB1) is normal.
  • Page 106 Checking code Meaning, detecting method Cause Checking method & Countermeasure 4115 Power supply The frequency cannot be (1) There is an open phase in Check before the breaker, after sync signal determined when the power is the power supply. the breaker or at the power abnormality switched on.
  • Page 107 Checking code Meaning, detecting method Cause Checking method & Countermeasure 4220 Bus voltage If Vdc 289V is detected during (2) Voltage drop detected. <In the case of 4225> 4225 drop operation. (Software detection) Check the followings 1Check the voltage of CN52C abnormality (Error details on the main board...
  • Page 108 Checking code Meaning, detecting method Cause Checking method & Countermeasure 4240 Overload When the output current (lac) (1) Air passage short cycle. Ensure that a short cycle has not 4245 abnormality > Imax (Arms) or THHS > 90˚C occurred at the unit fan exhaust. is detected for 10 minutes in a row during the inverter operation.
  • Page 109 Checking code Meaning, detecting method Cause Checking method & Countermeasure 4250 Refer to 9.[4].6.(2).[2] Load short Shorting at the load <In the case of 4250> 4255 abnormality (compressor) side detected just (1) Shorting of compressor (Error details before starting the inverter. (2) Output wiring 105) (3) Power supply...
  • Page 110 Checking code Meaning, detecting method Cause Checking method & Countermeasure Thermistor resistance check 5101 Discharge 1. Shorting (high temperature (1) Thermistor failure (TH11) intake) or open (low Check for lead wire. (TH12) temperature intake) of the (2) Pinched lead wire thermistor is detected.
  • Page 111 Checking code Meaning, detecting method Cause Checking method & Countermeasure High pressure See Troubleshooting of 5201 1. When pressure sensor (1) Pressure sensor trouble. pressure sensor. sensor detects 0.098MPa or less abnormality during operation, outdoor unit (outdoor unit) once stops with 3 minutes (2) Inner pressure drop due to restarting mode, and restarts a leakage.
  • Page 112 Checking code Meaning, detecting method Cause Checking method & Countermeasure IPM- Check CNCT2 sensor 5301 IPM open damage or CNCT2 (1) ACCT sensor is dislocated open/ACCT connection (Check ACCT 5305 dislocation was detected just connection installation state) before INV started. (Sufficient abnormality current was not detected during Check CNDR2 connection on...
  • Page 113 Checking Meaning, detecting method Cause Checking method & Countermeasure code Transmission processor hardware 6602 (1) At the collision of mutual transmission data generated during the wiring abnormality work or polarity change of the transmission line of indoor or outdoor unit while turning the power source on, the wave shape is changed and Though transmission processor the error is detected.
  • Page 114 Checking Meaning, detecting method Cause Checking method & Countermeasure code Communications with transmission Turn off power sources of indoor unit, 6606 (1) Data is not properly and outdoor unit. processor abnormality transmitted due to casual erroneous operation of the When power sources are turned Communication trouble between generating controller.
  • Page 115 Checking Meaning, detecting method code No ACK abnormality 6607 When no ACK signal is detected in 6 continuous times with 30 seconds (continued) interval by transmission side controller, the transmission side detects error. Note : The address/attribute shown on remote controller indicates the controller not providing the answer (ACK).
  • Page 116 Checking Meaning, detecting method code 6607 No ACK abnormality When no ACK signal is detected in 6 continuous times with 30 seconds (continued) interval by transmission side controller, the transmission side detects error. Note : The address/attribute shown on remote controller indicates the controller not providing the answer (ACK).
  • Page 117 Checking Meaning, detecting method code 6607 No ACK abnormality When no ACK signal is detected in 6 continuous times with 30 seconds (continued) interval by transmission side controller, the transmission side detects error. Note : The address/attribute shown on remote controller indicates the controller not providing the answer (ACK).
  • Page 118 Checking Meaning, detecting method code 6607 No ACK abnormality When no ACK signal is detected in 6 continuous times with 30 seconds (continued) interval by transmission side controller, the transmission side detects error. Note : The address/attribute shown on remote controller indicates the controller not providing the answer (ACK).
  • Page 119 Checking Meaning, detecting method code No ACK abnormality 6607 When no ACK signal is detected in 6 continuous times with 30 seconds (continued) interval by transmission side controller, the transmission side detects error. Note : The address/attribute shown on remote controller indicates the controller not providing the answer (ACK).
  • Page 120 Checking code Meaning, detecting method Factor Checking method & Remedy (1) Check the transmission lines 6831 1. Communication between the (1) The remote control line of Communication MA remote controller and the the MA remote controller or of the indoor unit and MA no reception indoor unit is not done the indoor unit has a poor...
  • Page 121 3. System error Checking Meaning, detecting method Cause Checking method & Countermeasure code (a) Check for the model total (capacity 7100 Total capacity abnormality (1) Total capacity of indoor units cord total) of indoor units connected. in the same refrigerant Total capacity of indoor units in the system exceeds the (b) Check for the switch (SW2 on...
  • Page 122 Checking Meaning, detecting method Cause Checking method & Countermeasure code Check transmission booster and power 7110 Connection number setting (1) Transmission booster is abnormality faulty. supply. (2) Power supply of transmission booster has been cut. 7111 Remote control sensor abnormality (a) Replace the remote controller with (1) The remote controller without the one with built-in temperature...
  • Page 123 4. Trouble shooting according to the remote controller malfunction and the external input error (1) In the case of MA remote controller Phenomena Factors Checke method & Handling Even if the operation SW on (1) The power for the indoor unit is not (a) Check voltage of the MA remote controller terminal (among 1 to 3).
  • Page 124 Phenomena Factors Checke method & Handling When turning on the remote (1) The power for the M-NET When the factor (2) and (3) controller operation SW, a transmission line is not supplied temporary operation display is from the outdoor unit. apply, self-diagnosis LED works and the check code 7102 will be indicated, and the display...
  • Page 125 Phenomena Factors “HO” display on the remote (1) The power for the M-NET transmission line is not controller does not turn off, supplied from the outdoor unit. When the factor and the switch does not work. (2) Short circuit of the transmission line. (2) and (3) apply, self-diagnosis (3) Incorrect wiring of the M-NET transmission line on...
  • Page 126 <Flow chart> Even if the operation SW on the remote controller is pressed, the indoor and the outdoor units do not start running. - 124 -...
  • Page 127 (2) In the case of the M-NET remote controller Phenomena Factors Checke method & Handling Even if the operation SW on (a) Check voltage of the M-NET remote (1) The power for the M-NET controller transmission terminal. the remote controller is transmission line is not supplied i) If the voltage is 17V-30V pressed, the display remains...
  • Page 128 Phenomena Factors “HO” display on remote (Without using MELANS) controller does not disappear (1) Outdoor unit address is set to “00” and ON/OFF switch is (2) Erroneous address. 1 Address setting of indoor unit to be coupled with remote controller incorrect. ineffective.
  • Page 129 Phenomena Factors Checke method & Handling (a) Confirm the address of unit to be “88” appears on remote (Generates at registration and controller at registration and confirmation) coupled. (b) Check the connection of access remote controller. (1) Erroneous address of unit to be transmission line.
  • Page 130 (3) Both for MA remote controller and M-NET remote controller Phenomena Factors Checke method & Handling (a) Observe difference between sensor Cooling with normal remote (1) Insufficient frequency rise 1 Faulty detection of pressure detected pressure and actual controller display but not providing capacity.
  • Page 131 Phenomena Factors Checke method & Handling Cooling with normal remote (7) Clogging by foreign matter Check temperature difference between controller display but not before and after a portion (strainer, providing capacity. distributor) of low pressure piping where foreign matter may likely be clogged.
  • Page 132 Phenomena Factors Checke method & Handling Heating with normal remote (3) When abnormal temperature of Check piping thermistor. controller display but not indoor unit piping temperature providing capacity. sensor is taken higher, LEV is throttled excessively due to apparent small sub-cooling. (4) Abnormal speed of outdoor unit fan Refer to the page of outdoor unit fan.

  • Page 133: Investigation Of Transmission Wave Shape/Noise

    [3] Investigation of Transmission Wave Shape/Noise 1. M-NET transmission Control is performed by exchanging signals between outdoor unit, indoor unit and remote controller by M-NET transmission. If noise should enter into the transmission line, the normal transmission will be hindered causing erroneous operation.
  • Page 134 (3) Checking and measures to be taken (a) Measures against noise Check the items below when noise can be confirmed on wave shape or the error code in the item (1) is generated. Items to be checked Measures to be taken (1) Wiring of transmission and power lines in cross- Isolate transmission line from power line (5cm or more).
  • Page 135 2. MA remote control transmission The MA remote control and indoor unit communicate with the current tone burst method. (1) Symptoms caused by infiltration of noise on transmission cable If noise, etc., infiltrates the transmission cable and the communication between the MA remote control and indoor unit is cut off for three consecutive minutes, a MA communication error (6831) will occur.

  • Page 136: Troubleshooting Of Principal Parts

    [4] Troubleshooting of Principal Parts 1. Pressure sensor (1) Check for failure by comparing the sensing pressure according to the high pressure/low pressure pressure sensor and the pressure gauge pressure. Set SW1 as shown below to display the high and low pressure sensor data displayed digitally by the light emitting diode LD1.
  • Page 137 2. Low-pressure pressure sensor (63LS) Conduct the check comparing the pressure that is detected by the low-pressure pressure sensor and the low-pressure gauge pressure. The pressure that is detected by the low-pressure pressure sensor will be displayed on the LED screen, LD1 when setting the digital shift switch (SW1) as shown below.
  • Page 138 3. Solenoid valve Check if the control board’s output signals and the operation of the solenoid valves match. Setting the self-diagnosis switch (SW1) as shown in the figure below causes the ON signal of each relay to be output to the LED’s. Each LED shows whether the relays for the following parts are ON or OFF.
  • Page 139 (4) In the case of 21S4b (4-way switching valve) About this 4-way valve When not powered : The electricity runs between the oil separator exit and the heat exchanger (in the case of P400 types) HEXB, between heat exchangers at the rear (in the case of P450-P650 types), and between HEX1b and 2b (heat exchanger on the left (as you face the front of the unit)).
  • Page 140 5. LEV (1) Indoor LEV The valve opening angle changes in proportion to the number of pulses. (Connections between the indoor unit’s control board and indoor LEV.) Indoor control board Wire joining connecter DC12V φ 6 Brown φ 5 φ 4 φ...
  • Page 141 (2) Outdoor LEV The valve opening angle changes in proportion to the number of pulses. (Connections between the outdoor unit’s MAIN board and LEV1.) Outdoor MAIN board DC12V φ 6 φ 5 Brown Drive circuit φ 4 φ 4 Blue φ...
  • Page 142 (3) Judgment methods and likely failure mode Caution: The specifications of the outdoor unit (outdoor LEV) and indoor unit (indoor LEV) differ. For this reason, there are cases where the treatment contents differ, so follow the treatment specified for the appropriate LEV as indicated in the right column.
  • Page 143 (4) Outdoor LEV coil removal procedure (configuration) As shown in the figure, the outdoor LEV is made in such a way that the coils and the body can be separated. Coils Body Stopper Lead wire Removing the coils: Fasten the body tightly at the bottom (Part A in the figure) so that the body will not move, then pull out the coils toward the top.
  • Page 144 6. Inverter and compressor a. Replace only the compressor if only the compressor is found to be defective. (Overcurrent will flow through the inverter if the compressor is damaged, however, the power supply is automatically cut when overcurrent is detected, protecting the inverter from damage.) b.
  • Page 145 (2) Treatment of inverter output related troubles Check item Phenomena Treatment Perform the following: (1) IPM/overcurrent error. • Replace the INV board. Check the INV 1. Disconnect INV board CNDR2. (4250 detailed No. 101, 102, 103, board error After removing, turn on the out- 104, 105, 106, 107) detection circuit.
  • Page 146 Check item Phenomena Treatment 1. Check to see if the IPM screw (1) Screw terminal is loose. Check all IPM screw terminals and Check the terminal is loose. tighten. inverter circuit trouble. 2. Check the exterior of the IPM. (2) IPM is cracked due to swelling. •...
  • Page 147 (3) Trouble measures when main power breaker tripped Check item Phenomena Treatment Perform Meg check between the (1) Zero to several ohm, or Meg failure. Check each part in the main inverter circuit. terminals in the power terminal • Refer to "Simple checking Procedure for in- block TB1.
  • Page 148 (5) Intelligent power module (IPM) Measure resistances between each terminal of IPM with tester, and use the results for troubleshooting Notes on measurement • Make sure the polarity before the measurement. (On the tester, black normally indicates plus.) • Make sure that the resistance is not open (∞Ω) or not shorted (to 0Ω). •...
  • Page 149 (7) Caution at replacement of inverter parts (1) Fully check wiring for incorrect and loose connection. The incorrect or loose connection of the power circuit part wiring like IPM and diode module causes to damage the IPM. Therefore, check the wiring fully. As the insufficient tightening of screws is difficult to find, tighten them together additionally after finishing other works.
  • Page 150 7. Control circuit (1) Control power source function block [ P200~P400 types ] Power source system Control system (DC5~30V) Smoothing Compressor Noise filter Rectifier 52C1 capacitor Inverter AC380~415V Terminal block for power source G/A board Fuse (6.3A) Fuse IPM drive circuit (10A) Heat exchanger...
  • Page 151 [ P450~P650 types ] Power source system Control system (DC5~30V Fuse (50A) 51C2 52C2 No.2 Compressor Smoothing No.1 capacitor Inverter AC380~415V Rectifier 52C1 Noise filter Compressor Terminal block for power source G/A board Heat Fuse (6.3A) exchanger 52C2 Fuse Relay board IPM drive circuit (10A) Heat...
  • Page 152 (2) Outdoor unit transmission power source circuit failure judgment Check voltage of indoor/outdoor transmis- sion terminal block (TB3) of outdoor unit. Check and modify transmission line for DC24 ~ 30V disconnection & poor contact Check voltage of TB3 by removing transmission line from TB3.

  • Page 153: Refrigerant Leak

    [5] Refrigerant Leak 1. Leak spot: In the case of extended pipe for indoor unit (Cooling season) 1 Mount a pressure gauge on the check joint (CJ2) for low-pressure service. 2 Stop all the indoor units, and close the liquid ball valve (BV2) inside the outdoor unit while the compressor is being stopped.
  • Page 154 3. Leak spot: In the case of extended pipe for indoor unit (Heating season) 1 Conduct a test run for all the indoor units under the heating mode. (1) To start a test run for all the indoor units, turn on SW3-2 when SW3-1 on the outdoor unit main board is ON. (2) Change the setting of the remote controller for all the indoor units to the heating mode.

  • Page 155: Compressor Replacement Instructions (Only P450-P650 Types)

    [6] Compressor Replacement Instructions (only P450-P650 types) Follow the instructions below when replacing the compressor. When replacing the compressor No.1 (inverter drive), start replacing after judging whether the compressor is malfunctioning or the inverter is malfunctioning. When only one compressor is malfunctioning, operate the compressor for approximately an hour under emergency operation mode before the replacement, check the items below, and replace the compressor after examining whether the return oil circuit is working properly or not.

  • Page 156: Collecting The Cooling Liquid From The Accumulator (Only P450-P650 Types)

    (19) Attach the crankcase heater. Note : Attach the appropriate crankcase heater to the appropriate compressor. (20) Attach the soundproof material to the compressor. (21) Attach the discharge tempareture themistor, and attach the insulation cover. (22) Attach the power source wire to the terminal on the compressor. (23) After vacuuming, calculate the amount of added refrigerant at factory shipment and the amount of added refrigerant on site, and charge the system.

  • Page 157: Led Display

    LED display [1] LED Monitor Display 1. How to read LED for service monitor By setting of DIP SW1-1 ~ 1-10, the unit operating condition can be observed with the service LED on the control circuit board. (For the relation of each DIP SW to the content, see the table provided.) As shown in the figure below, the LED consist of 7 segments is put in 4 sets side by side for numerical and graphic display.
  • Page 158 3. Time data storage function ❉ This function is not compatible with some units. The outdoor unit has a simple clock function to receive the time setting from the system controller, such as the G50A, and count the current time with an internal timer. If an error (prediction) occurs, the error history data and the error detection time are saved in the service memory.
  • Page 159 4. List of code on the LED monitor LED monitor display The following abbreviations are used in this table. IC : Indoor unit, OC : Outdoor unit Item Remarks 1234567890 0000000000 Relay output display 1 Comp Comp 1 Comp 2 Lights for LD8 is a relay output (lighting to display)
  • Page 160 Item Remarks 1234567890 0111100000 Unit No.1 Unit No.2 Unit No.3 Unit No.4 Unit No.5 Unit No.6 Unit No.7 Unit No.8 Indoor unit Lights up when thermostat thermostat is on. Unit No.9 Unit No.10 Unit No.11 Unit No.12 Unit No.13 Unit No.14 Unit No.15 Unit No.16 1111100000 Goes off when thermostat is off.
  • Page 161 Item Remarks 1234567890 1110001000 High pressure 0001001000 -99.9 ~ 999.9 The unit is [ kgf/cm ↑ Low pressure 1001001000 0101001000 1101001000 0011001000 1011001000 Σ Qj 0000 ~ 9999 0111001000 Σ Qjc ↑ 1111001000 Σ Qjh ↑ 0000101000 -99.9 ~ 999.9 1000101000 Target condensor The unit is [...
  • Page 162 Item Remarks 1234567890 0000 ~ 9999 111 1111011000 COMP1 bus voltage The unit is [ 112 0000111000 113 1000111000 114 0100111000 115 1100111000 116 0010111000 117 1010111000 Compressor 1 opera- 0000 ~ 9999 The unit is [ tin time upper 4 digits. ↑...
  • Page 163 Item Remarks 1234567890 150 0110100100 151 1110100100 152 0001100100 153 1001100100 154 0101100100 155 1101100100 156 0011100100 157 1011100100 158 0111100100 159 1111100100 160 0000010100 161 1000010100 162 0100010100 163 1100010100 164 0010010100 165 1010010100 166 0110010100 167 1110010100 168 0001010100 169 1001010100 170 0101010100 171 1101010100...
  • Page 164 Item Remarks 1234567890 Inverter error detail Inverter error detail (0001 ~ 0120) Address and error code 193 1000001100 are reversed and disp- 194 0100001100 0000 ~ 9999 layed. Error history 9 "----" is displayed when there is no error. Inverter error detail Inverter error detail (0001 ~ 0120) 195 1100001100 0000 ~ 9999...
  • Page 165 Item Remarks 1234567890 229 1010011100 230 0110011100 -99.9 ~ 999.9 The unit is [ ˚C 231 1110011100 THHS1 232 0001011100 233 1001011100 234 0101011100 THHS5 -99.9 ~ 999.9 235 1101011100 236 0011011100 237 1011011100 238 0111011100 239 1111011100 240 0000111100 241 1000111100 242 0100111100 243 1100111100...
  • Page 166 Item Remarks 1234567890 271 1111000010 0000 ~ 9999 Number of fans being used 272 0000100010 273 1000100010 274 0100100010 0 ~ 480 275 1100100010 Outdoor LEV opening LEV1 pulses (Fully open: 480) 276 0010100010 277 1010100010 278 0110100010 279 1110100010 COMP1 operation -99.9 ~ 999.9 Peak value [...
  • Page 167 Item Remarks 1234567890 309 1010110010 310 0110110010 311 1110110010 312 0001110010 313 1001110010 314 0101110010 315 1101110010 316 0011110010 317 1011110010 318 0111110010 319 1111110010 320 0000001010 321 1000001010 322 0100001010 323 1100001010 324 0010001010 325 1010001010 326 0110001010 327 1110001010 328 0001001010 329 1001001010 330 0101001010...
  • Page 168 Item Remarks 1234567890 0000 ~ 9999 0000 ~ 9999 353 1000011010 IC3 Address/Capacity code Displayed alternately every 5 seconds. ↑ ↑ 354 0100011010 IC4 Address/Capacity code ↑ ↑ 355 1100011010 IC5 Address/Capacity code 356 0010011010 ↑ ↑ IC6 Address/Capacity code 357 1010011010 ↑...
  • Page 169 Item Remarks 1234567890 396 0011000110 397 1011000110 398 0111000110 399 1111000110 400 0000100110 401 1000100110 402 0100100110 403 1100100110 404 0010100110 405 1010100110 406 0110100110 407 1110100110 408 0001100110 IC1 Suction temperature -99.9 ~ 999.9 The unit is [ ˚C IC2 Suction temperature ↑...
  • Page 170 Item Remarks 1234567890 IC32 Suction temperature 439 1110110110 -99.9 ~ 999.9 The unit is [ ˚C 440 0001110110 441 1001110110 442 0101110110 443 1101110110 444 0011110110 445 1011110110 446 0111110110 447 1111110110 448 0000001110 449 1000001110 450 0100001110 451 1100001110 452 0010001110 453 1010001110 454 0110001110...
  • Page 171 Item Remarks 1234567890 IC25 Liquid pipe temp. 482 0100011110 -99.9 ~ 999.9 The unit is [ ˚C 483 1100011110 ↑ IC26 Liquid pipe temp. ↑ IC27 Liquid pipe temp. 484 0010011110 ↑ IC28 Liquid pipe temp. 485 1010011110 ↑ 486 0110011110 IC29 Liquid pipe temp.
  • Page 172 Item Remarks 1234567890 -99.9 ~ 999.9 The unit is [ ˚C IC3 Gas pipe temp. 525 1011000001 ↑ 526 0111000001 IC4 Gas pipe temp. ↑ IC5 Gas pipe temp. 527 1111000001 ↑ 528 0000100001 IC6 Gas pipe temp. ↑ 1000100001 IC7 Gas pipe temp.
  • Page 173 Item Remarks 1234567890 568 0001110001 569 1001110001 0101 110001 1101110001 0011110001 -99.9 ~ 999.9 1011110001 IC1SH The unit is [ ↑ 0111110001 IC2SH ↑ 1111110001 IC3SH ↑ 0000001001 IC4SH ↑ IC5SH 1000001001 ↑ 0100001001 IC6SH ↑ IC7SH 1100001001 ↑ IC8SH 0010001001 ↑...
  • Page 174 Item Remarks 1234567890 1100011001 0010011001 1010011001 0110011001 1110011001 0001011001 1001011001 0101011001 1101011001 0011011001 1011011001 0111011001 1111011001 -99.9 ~ 999.9 IC1SC The unit is [ ↑ 0000111001 IC2SC ↑ 1000111001 IC3SC ↑ 0100111001 IC4SC ↑ 1100111001 IC5SC ↑ 0010111001 IC6SC ↑ 1010111001 IC7SC ↑...
  • Page 175 Item Remarks 1234567890 -99.9 ~ 999.9 The unit is [ 0111000101 IC32SC 1111000101 0000100101 1000100101 0100100101 1100100101 0010100101 1010100101 0110100101 1110100101 0001100101 1001100101 0101100101 1101100101 0011100101 1011100101 0111100101 1111100101 0000010101 1000010101 0100010101 1100010101 0010010101 INV board S/W 0.00 ~ 99.99 version 1010010101 0110010101...
  • Page 176 Item Remarks 1234567890 Hour : minute 00:00 ~ 23:59 0001110101 Error detection time4 Display alternately 00.00 ~ 99.12 / 1 ~ 31 1001110101 Error detection time4-2 year/month and day Hour : minute 00:00 ~ 23:59 0101110101 Error detection time5 Display alternately 1101110101 00.00 ~ 99.12 / 1 ~ 31 Error detection time5-2...
  • Page 177 Item Remarks 1234567890 0000 ~ 2000 738 0100011101 Fully open : 2000 IC25 LEV opening pulses ↑ 1100011101 IC26 LEV opening pulses ↑ 0010011101 IC27 LEV opening pulses IC28 LEV opening pulses ↑ 1010011101 ↑ IC29 LEV opening pulses 0110011101 ↑...
  • Page 178 Item Remarks 1234567890 1011000011 IC18 Operation mode 0111000011 IC19 Operation mode 1111000011 IC20 Operation mode 0000100011 IC21 Operation mode 1000100011 IC22 Operation mode 0100100011 0000 : Off IC23 Operation mode 1100100011 IC24 Operation mode 0001 : Fan 0010100011 IC25 Operation mode 0002 : Cooling 1010100011 IC26 Operation mode...
  • Page 179 Item Remarks 1234567890 Hours since previous 0001101011 0000 ~ 9999 IC11 Filter maintenance [ h ] IC12 Filter 1001101011 ↑ 0101101011 IC13 Filter ↑ 1101101011 IC14 Filter ↑ 0011101011 IC15 Filter ↑ IC16 Filter ↑ 1011101011 0111101011 ↑ IC17 Filter IC18 Filter 1111101011 ↑...
  • Page 180 Item Remarks 1234567890 1100011011 0010011011 1010011011 0110011011 -99.9 ~ 999.9 1110011011 U phase current The unit is [ effective value 1 ↑ 0001011011 W phase current effective value 1 ↑ 1001011011 The unit is [ Power tactor phase angle 1 (deg) 0101011011 1101011011 0011011011...
  • Page 181 Item Remarks 1234567890 1101000111 1020 0011111111 1021 1011111111 1022 0111111111 1023 1111111111 - 179 -...
  • Page 182 Service Handbook PUHY-P200, P250, P300, P350, P400YGM-A PUHY-P450, P500, P550, P600, P650YGM-A PUY-P200, P250, P300, P350YGM-A HEAD OFFICE: MITSUBISHI DENKI BLDG., 2-2-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN Issued in Sep. 2004 HWE04010 New publication effective Sep. 2004. Printed in Japan...

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