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Mitsubishi Electric CITY MULTI PUHY-80TMU-A Service Handbook
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Mitsubishi Electric CITY MULTI PUHY-80TMU-A Service Handbook

Mitsubishi Electric CITY MULTI PUHY-80TMU-A Service Handbook

Air conditioners city multi series y
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AIR CONDITIONERS CITY MULTI Series Y
PUHY-80TMU-A, 100TMU-A
Models
Service Handbook

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Summary of Contents for Mitsubishi Electric CITY MULTI PUHY-80TMU-A

  • Page 1 AIR CONDITIONERS CITY MULTI Series Y PUHY-80TMU-A, 100TMU-A Models Service Handbook...

  • Page 2: Safety Precautions

    - Improper installation by the user may result in water leakage, vice is shorted and operated forcibly, or parts other than those electric shock, or fire. specified by Mitsubishi Electric are used, fire or explosion may • Install the air unit at a place that can withstand its weight.

  • Page 3: Table Of Contents

    Contents ..........1 COMPONENT OF EQUIPMENT ..........[1] Appearance of Components ... [2] Refirigerant Circuit Diagram and Thermal Sensor iger [3] PUHY-80, 100TMU-A ELECTRICAL WIRING ............... DIAGRAM ..........Standard operation data ........ [5] Function of dip SW and rotary SW ................

  • Page 4: Component Of Equipment

    Propeller fan Fan motor - 1 -...
  • Page 5 Rear Controller Box INV board MAIN board Choke coil(L2) Interrigent Power Module(IPM) Magnetic contactor(52C) Capacitor (C1)(Smoothing capacitor) Gate Amplifier board(G/A board) Diode stack(DS) Power board Terminal block(TB7)Transmission Terminal Terminal block (TB1) block (TB3) Power source Transmission - 2 -...
  • Page 6 MAIN board CNS1 M-NET Transmission (DC30V) CNS2 M-NET Transmission (Centralized control) (DC30V) CN40 M-NET Transmission Power supply CNVCC3 Power source for contorl 1-2 DC30 V 1-3 DC30 V 4-6 DC12 V 5-6 DC5 V CN51 Indication distance 3-4 Compressor ON/ 3-4 trouble Service LED CNRS53...

  • Page 7: Inv Board

    INV board CNDC2 1-3 DC310 V CN15V2 Power supply IPM control 1-2 DC15 V 5-6 DC15 V 9-0 DC15 V C-D DC15 V CNVCC4 CNL2 Choke coil CNVCC2 power supply CNDR2 IPM control signal CNCT CNTH CNAC2 CN52C CNRS2 Power source Control for Serial transmission 1 L2...
  • Page 8 G/A board CNDC1 1 - 3 DC310V DC310V CN15V1 Power Supply IPM control 1 - 2 DC15V 5 - 6 DC15V 9 - 0 DC15V C - D DC15V CNDR1 IPM control signal Power board - 5 -...

  • Page 9: Refirigerant Circuit Diagram And Thermal Sensor Iger

    [2] Refirigerant Circuit Diagram and Thermal Sensor 1 PUHY-80TMU-A, 100TMU-A - 6 -...

  • Page 10: Puhy-80, 100Tmu-A Electrical Wiring Diagram

    [3] PUHY-80, 100TMU-A ELECTRICAL WIRING DIAGRAM - 7 -...
  • Page 11 - 8 -...

  • Page 12: Standard Operation Data

    [4] Standard operation data 1 Cooling operation Outdoor units PUHY-80TMU-A PUHY-100TMU-A Items Indoor 26.7°C(80°F)/19.4°C(67°F) DB/WB Ambient temp. Outdoor 35°C(95°F) Quantity Indoor unit Quantity in operation – Model Main pipe 5(16.4) 5(16.4) Piping Branch pipe 5(16.4) 5(16.4) 5(16.4) 5(16.4) 5(16.4) 5(16.4) 5(16.4) 5(16.4)
  • Page 13 2 Heating operation Outdoor units PUHY-200TM-A PUHY-250TM-A Items 21.1°C(70°F) Indoor DB/WB Ambient temp. 8.3°C(47°F)/6.1°C(43°F) Outdoor Quantity Indoor unit Quantity in operation – Model 5(16.4) 5(16.4) Main pipe Piping Branch pipe 5(16.4) 5(16.4) 5(16.4) 5(16.4) 5(16.4) 5(16.4) 5(16.4) 5(16.4) 25(82) 25(82) Total piping length Indoor unit fan notch –...

  • Page 14: Function Of Dip Sw And Rotary Sw

    [5] Function of dip SW and rotary SW (1) Outdoor unit Function According to Switch Operation Switch Set Timing Switch Function When Off When On When Off When On Set on 00 or 51~100 with the dial switch. ( 2) Before power is turned on.
  • Page 15 2. SW4-9 setting Fan characteristics curve:DIPSW4-7OFF[FactorySetting],208V•230V/60Hz Fan characteristics curve:DIPSW4-7ON,208V/60Hz Fan characteristics curve:DIPSW4-7ON,230V/60Hz Continuous operation range Standard Airflow rate 200(m /min) Airflow rate (m /min) - 12 -...
  • Page 16 (2) Indoor unit DIP SW1, 3 Operation by SW Switch set timing Remarks Switch SW name Room temp. sensor position Indoor unit inlet Built in remote controller Clogged filter detect. None Provided Filter duration 100h 2500h Always ineffective for PKFY-NAMU OA intake Ineffective Effective...
  • Page 17 Setting of DIP SW4 Setting of DIP SW5 Model Circuit board used PDFY-10 ~ 32 PLFY-12 ~ 24 PLFY-32 ~ 48 Phase control PKFY-P-8 PKFY-P-12 – – – – Relay selection PDFY-40, 48 – - 14 -...

  • Page 18: Test Run

    TEST RUN [1] Before Test Run (1) Check points before test run Neither refrigerant leak nor loose power source/ transmission lines should be found, if found correct immediately. Confirm that the resistance between the power source terminal block and the ground exceeds 2MΩ by measur- ing it with a DC500V megger.
  • Page 19 (3) Check points for test run when mounting options Result Built-in optional parts Content of test run Check point Mounting of drain Release connector of pump circuit, Local remote controller displays code water pump check error detection by pouring No. “2503”, and the mechanism stops. mechanism water into drain pan water inlet.
  • Page 20 Check points for system structure Check points from installation work to test run. Classification Portion Check item Trouble Installation and Instruction for selecting combination of outdoor unit, piping and indoor unit followed? (Maximum number of indoor Not operate. units which can be connected, connecting model name, and total capacity.) Follow limitation of refrigerant piping length? For example, 70m (229ft) or less (total length : 220m (721ft)) at the farthest.
  • Page 21 CENTRALLY CONTROLLED CENTRALLY CONTROLLED DRY COOL SENSOR DRY COOL SENSOR DAILY DAILY TIMER AUTO AUTO INSIDE TIMER AUTO AUTO INSIDE AUTO FAN AUTO FAN CLOCK CLOCK SPEED FILTER SPEED FILTER HEAT CHECK SET TEMP. REMAINDER HEAT CHECK SET TEMP. REMAINDER VENTILATION VENTILATION TEST RUN...

  • Page 22: Test Run Method

    [2] Test Run Method Operation procedure Turn on universal power supply at least 12 hours before starting → Displaying “HO” on display panel for about two minutes button twice → Displaying “TEST RUN’’ on display panel Press TEST button → Make sure that air is blowing out Press MODE Press...

  • Page 23: Grouping Registration Of Indoor Units With M-Net Remote Controller

    3 GROUPING REGISTRATION OF INDOOR UNITS WITH M-NET REMOTE CONTROLLER (1) Switch function • The switch operation to register with the remote controller is shown below: CENTRALLY CONTROLLED DRY COOL SENSOR DAILY TIMER AUTO AUTO INSIDE AUTO FAN CLOCK SPEED FILTER CHECK SET TEMP.
  • Page 24 (2) Attribute display of unit • At the group registration and the confirmation/deletion of registration/connection information, the type (attribute) of the unit is displayed with two English characters. Display Type (Attribute) of unit/controller Indoor unit connectable to remote controller Outdoor unit Local remote controller System controller (MJ) [Description of registration/deletion/retrieval]...
  • Page 25 (3) Group registration of indoor unit Registration method • Group registration of indoor unit ................ The indoor unit to be controlled by a remote controller is registered on the remote controller. [Registration procedure] With the remote controller under stopping or at the display of “HO”, continuously press the button FILTER LOUVER...
  • Page 26 Method of retrieval/confirmation • Retrieval/confirmation of group registration information on indoor unit ....The address of the indoor unit being registered on the remote controller is displayed. [Operation procedure] With the remote controller under stopping or at the display of “HO”, continuously press the button FILTER LOUVER...
  • Page 27 • Registered ßC (Alternative display) ßC SET TEMP. ON/OFF CLOCK ON OFF MODE TIMER FAN SPEED AIR DIRECTION FILTER LOUVER VENTILATION CHECK TEST TIMER SET PAR-F27MEA-US ßC (Alternative display) Set the address Press the switch for confirmation ( ) ßC ˚C INDOOR UNIT ERROR CODE...
  • Page 28 Deletion of information on address not existing • Deletion of information on address not existing ........... This operation is to be conducted when “6607” error (No ACK error) is displayed on the remote controller caused by the miss setting at test run, or due to the old memory remained at the alteration/modification of group composition, and the address not existing will be deleted.

  • Page 29: Control

    4 CONTROL [1] Control of Outdoor Unit Initial processing • When turning on power source, initial processing of microcomputer is given top priority. • During initial processing, control processing corresponding to operation signal is suspended. The control processing is resumed after initial processing is completed. (Initial processing : Data processing in microcomputer and initial setting of each LEV opening, requiring approx.
  • Page 30 Frequency control • Depending on capacity required, capacity control change and frequency change are performed to keep constant evaporation temperature (0˚C) in cooling operations, and high pressure (18kg/cm G) in heating operation. • Frequency change is perfprmed at the rate of 3Hz/second across 20 ~ 110Hz range. 1) Frequency control starting •...
  • Page 31 3 Back up of frequency control by bypass valve During 20Hz operations, frequency is backed up by turning on (opening) bypass valve (SV2). • Cooling During 20Hz operations 3 minutes after starting compressor, bypass valve is turned on when ET is -30˚C (-22°F) or less, and turned off when ET is -15˚C (5°F) or more.
  • Page 32 5) Change in number of operating indoor units during defrosting operations • In case number of operating indoor units changes during defrosting operations, the defrosting operations continue, and control of unit number change is performed after the defrosting operations are finished. •...
  • Page 33 (10) Refrigerant recovery control Refrigerant recovery is conducted to prevent refrigerant from accumulating in the stopped unit (fan unit), the unit under cooling mode and that with heating thermostat being turned off. 1) Start of refrigerant recovery 1 Refrigerant recovery is started when the two items below are fully satisfied. •...

  • Page 34: Operation Flow Chart

    [2] Operation Flow Chart Outdoor unit (Cooling, heating modes) Start Normal operations Breaker turned on Trouble observed Stop "HO" blinks on remote controller Note: 1 temperature display Set indoor ad- dress No. to remote controller Operation command 1. Protection function self- holding cancelled 2.
  • Page 35 Indoor unit (Cooling, heating, dry, and fan modes) Start Normal operations Trouble observed Breaker turned on Stop Operation SW turned on 1. Protection function self-holding cancelled 2. Indoor unit LEV fully closed Note: 2 Remote controller display extinguished Error mode Operation mode Error stop Aux.
  • Page 36 Cooling operation Cooling operation Normal operations 4-way valve OFF Test run Stop Indoor unit fan Note: 1 operations Test run start Thermostat ON 3-minute restart pre- vention 1. Inverter output 0Hz 1. Inverter frequency control 2. Indoor unit LEV, oil return LEV, 2.
  • Page 37 Heating operation (Only for PUHY) Normal operations Heating operation Defrosting operations Stop Note: 1 Note: 2 Test run Defrosting operation 4-way valve OFF 4-way valve ON Test run start 1. Indoor unit fan stop 2. Inverter defrost frequency control 3. Indoor unit LEV fully opened, oil return LEV fully closed, Thermostat ON Subcool bypass LEV fully opened...
  • Page 38 Dry operation Dry operations Normal operations Thermostat ON 4-way valve OFF Stop 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 39: List Of Major Component Functions

    [3] List of Major Component Functions Symbol Name Part code Application Specification Check method (function) Adjust refrigerant circulation by con- Com- Low pressure shell scroll trolling operating frequency and ca- pressor type with capacity control pacity control valve with operating mechanism pressure.
  • Page 40 Symbol Name Part code Application Specification Check method (function) Continuity check by Solenoid 1) High/low press. bypass at starting/ AC 220V tester valve (discharge - stopping and capacity control at Open at energizing and suction by- low load close at deenergizing pass) 2) Discharge press.

  • Page 41: Resistance Of Temperature Sensor

    [4] Resistance of Temperature Sensor Thermistor for low temperature = 15kΩ ± 3% (TH5 ~ 8) = 7.465kΩ ± 2% (TH1) Thermistor R Thermistor R = 15exp {3460 ( = 7.465exp {4057 ( 273+tc 273+0 273+tc 273+120 ∗˚F= × ˚C + 32 ∗˚F= ×...

  • Page 42: Refrigerant Amount Adjustment

    REFRIGERANT AMOUNT ADJUSTMENT Clarify relationship between the refrigerant amount and operating characteristics of CITY MULTI, and perform service activities such as decision and adjustment of refrigerant amount on the market. [1] Refrigerant Amount and Operating Characteristics The followings are refrigerant amount and operating characteristics which draw special attention. During cooling operations, required refrigerant amount tends to increase (refrigerant in accumulator decreases) in proportion to increase in the number of operating indoor units.
  • Page 43 (2) Refrigerant Volume Adjustment Operation 1) Operating Characteristics Refrigerant Volume Characteristic items related to operating characteristics and the refrigerant volume are shown below. If the number of indoor units in operation increases during cooling, the required volume of refrigerant tends to increase (the amount of refrigerant in the accumulator tends to decrease), but the change is minimal.
  • Page 44 At the time of shipping from the factory, the outdoor unit is charged with the amount of coolant shown in the follow- ing table, but since no extension piping is included, please carry out additional charging on-site. Outdoor Unit Model Name PUHY-80TMU-A PUHY-100TMU-A Refrigerant Charge Volume 6.5kg...
  • Page 45 3) Refrigerant Volume Adjustment Mode Operation 1 Procedure Depending on the operating conditions, it may be necessary either to charge with supplementary refrigerant, or to drain out some, but if such a case arises, please follow the procedure given below flow chart. Switching the function select switch (SW2-4), located on the outdoor unit's control board, ON starts refrigerant volume adjustment mode operation and the following operation occurs.
  • Page 46 Refrigerant adjustment method Start = Yes Note 1, Operated using outdoor unit DIP SW3-1 and 3-2. = No Note 2 , Ensure that no refrigerant is released into the Note 1 atmosphere All indoor units are run in Note 3 , Always charge the system with liquid test cooling mode refrigerant, if the system is charged with gas the composition will change and...

  • Page 47: Troubleshooting

    6 TROUBLESHOOTING [1] Principal Parts Pressure Sensor (1) Judging Failure 1) Check for failure by comparing the sensing pressure according to the high pressure sensor and the pressure gauge pressure. Turn on switches 1, 3, 5, 6 of the digital display select switch (SW1) as shown below, and the sensor pressure of the high pressure sensors is displayed digitally by the light emitting diode LD1.
  • Page 48 Connector connection specifications on the pressure sensor body side. The connector’s pin numbers on the pressure sensor body side differ from the pin numbers on the main circuit board side. Sensor Body Side MAIN Board Side Pin 1 Pin 3 Vout Pin 2 Pin 2...
  • Page 49 Outdoor LEV The valve opening angle changes in proportion to the number of pulses. (Connections between the outdoor unit’s MAIN board and SLEV, LEV1 (outdoor electronic expansion valve)) Driver Circuits Gray Black Yellow Orange Outdoor MAIN Board (Connectors CNLV1, CNLV2) Pulse Signal Output and Valve Operation Output pulses change in the following orders when the Output (Phase)
  • Page 50 Judgment Methods and Likely Failure Mode Caution: The specifications of the outdoor unit (outdoor LEV) and outdoor units (indoor LEV) differ. For this reason, there ar e cases where the treatment contents differ, so follow the treatment specified for the appropriate LEV as indicated in the right column.
  • Page 51 Outdoor LEV (SLEV, LEV1) 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 Indentation for Stopper (12 places Lead Wires around the circumference) <Removing the Coils>...
  • Page 52 Intelligent Power Module (IPM) Measure resistances between each terminal of IPM with tester, and use the results for troubleshooting. Focus on whether there is a complete open (∞Ω) state or short-circuit (~0Ω). The measured resistance value is a guideline and may deviate slightly. Measure between several similar measurement points.
  • Page 53 Trouble and remedy of remote controller Symptom Cause Checking method & countermeasure Despite pressing of 1) M-NET transmission power source is not supplied a) Check transmission terminal block of re- remote controller from outdoor unit. mote controller for voltage. switch, operation 1Main power source of outdoor unit is not connected.
  • Page 54 Symptom Cause “HO” display on re- (Without using MELANS) mote controller does 1) Outdoor unit address is set to “00.” not disappear and 2) Erroneous address switch is ineffective. 1Address setting miss of indoor unit to be coupled with remote controller (Remote controller is not set to - 100.) 2Address setting miss of remote controller (Indoor unit is not set to + 100.)
  • Page 55 Symptom Cause Checking method & countermeasure “88” appears on re- [Generates at registration and confirmation] a) Confirm the address of unit to be coupled. mote controller at the 1) Erroneous address of unit to be coupled b) Check the connection of transmission line. registration and 2) Slipping off of transmission line of unit to be c) Check the transmission terminal block voltage...
  • Page 56 Transmission Power Circuit (30 V) Check Procedure If “ ” is not displayed by the remote control, investigate the points of the trouble by the following procedure and correct it. Check Item Judgment Response Disconnect the transmission line from TB3 DC24~30 V Check the transmission line for the following, and and check the TB3 voltage.
  • Page 57 Investigation of transmission wave shape/noise Control is performed by exchanging signals between outdoor unit, indoor unit and remote controller by M-NET trans- mission. If noise should enter into the transmission line, the normal transmission will be hindered causing erroneous operation. 1) Symptom caused by the noise entered into transmission line Cause Erroneous operation...
  • Page 58 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 Isolate transmission line from power line (5cm or more).
  • Page 59 4) Treatment of Inverter and Compressor Troubles If the compressor does not work when error codes 4240 or 4250 are detected, determine the point of malfunction by following the steps in the appropriate sections on the pages starting from page 75, then perform the procedures below.
  • Page 60 5) Troubleshooting at breaker tripping Check items Measures to be taken 1 Check the breaker capacity. The breaker’s capacity should be proper. 2 Check the a short circuit or grounding in the electrical sys- Correct any defects. tem other than the inverter. 3 Check the resistance between terminals on the terminal Check each part inside the inverter power circuit (re- block TB1 for power source.
  • Page 61 6) Individual Parts Failure Judgment Methods. Part Name Judgment Method Diode Stack (DS) Refer to “Judging Diode Stack Failure.” (P49) Intelligent Power Module (IPM) Refer to “Judging IPM Failure.” (P49) Electromagnetic Contactor (52C) Measure the resistance value at each terminal. Check Location Judgment Value 50~100kΩ...
  • Page 62 Model PUHY-80TMU-A, 100TMU-A To compressor White Blue Blue To capacitor (C1) board - 59 -...
  • Page 63 Check Code List Check Code Check Content 0403 Serial transmission trouble 0900 Trial operation 1102 Discharge temperature trouble 1111 Low pressure saturation temperature sensor trouble (TH2) 1302 High pressure trouble 1500 Refrigerant volume charge trouble 1505 Suction pressure trouble 2500 Leakage (water) trouble 2502 Drain pump trouble...
  • Page 64 Check Code Check Content 6606 Communications with transmission processor abnormality 6607 No ACK abnormality 6608 No response abnormality 6831 MA communication, No-reception error 6832 MA communication, Synchronization recovery error 6833 MA communication, Transmission/reception handware error 6834 MA communication, Start bit error 7100 Total capacity abnormality 7101...

  • Page 65: Self-Diagnosis And Countermeasures Depending On The Check Code Displayed

    [2] Self-diagnosis and Countermeasures Depending on the Check Code Displayed Mechanical Checking code Meaning, detecting method Cause Checking method & Countermeasure 1) Wiring is defective. Check 1, the connections, 2, contact 0403 Serial If serial transmission cannot be at the connectors and 3, for broken transmission established between the MAIN and INV boards...
  • Page 66 Checking code Meaning, detecting method Cause Checking method & Countermeasure 1) Gas leak, Gas shortage 1111 When saturation tempera- See Refrigerant amount check. pressure ture sensor (TH2) detects satura- –40°C or less (the first time) tion Check operating conditions and o p - 2) Insufficient load operations during operations, out- tempera-...
  • Page 67 Checking code Meaning, detecting method Cause Checking method & Countermeasure 1. When press. sensor detects 1302 High pressure 1) Poor operations of indoor LEV Check operations status by actually 28kg/cm or more during op- trouble 1 performing cooling or heating opera- erations (the first time), out- (Outdoor unit) tions.
  • Page 68 Checking code Meaning, detecting method Cause Checking method & Countermeasure 1302 High pressure 16)Control circuit board thermistor Check inlet temperature and press. trouble 1 trouble, press. sensor input cir- of sensor with LED monitor. (Outdoor unit) cuit trouble 17)Poor mounting of thermistor (TH2, TH5, H6) 18)Coming loose the connecter of pressure switch or cut of the wire.
  • Page 69 Checking code Meaning, detecting method Cause Checking method & Countermeasure 2500 Leakage When drain sensor detects 1) Water leak due to humidifier or the Check water leaking of humidifier (water) trouble flooding during drain pump like in trouble. and clogging of drain pan. OFF.
  • Page 70 Checking code Meaning, detecting method Cause Checking method & Countermeasure Open phase in the power sys- 4102 Open phase 1) Open phase has occurred in the Check before the breaker, after the tem is being detected, so op- error power supply (R, S, T). breaker or at the power supply ter- eration cannot be started.
  • Page 71 Checking code Meaning, detecting method Cause Checking method & Countermeasure Power supply The frequency cannot be deter- 1) There is an open phase in the Check before the breaker, after the 4115 sync signal mined when the power is power supply (R, S, T) breaker or at the power supply ter- trouble switched on.
  • Page 72 Checking code Meaning, detecting method Cause Checking method & Countermeasure 4200 VDCsensor/ 1 If VDC 150 V is detected 1) Power supply voltage is abnormal. • Check if an instantaneous power just before the inverter circuit trouble failure or power failure, etc. has oc- starts.
  • Page 73 Checking code Meaning, detecting method Cause Checking method & Countermeasure 4220 Bus voltage If VDC 220 V is detected dur- 1) The power supply voltage is abnor- • Check if an instantaneous stop or trouble ing inverter operation. mal. power failure, etc. has occurred. •...
  • Page 74 Checking code Meaning, detecting method Cause Checking method & Countermeasure 4240 Overcurrent If IDC 103 A is detected con- 1) Air passage Short Cycle Is the unit’s exhaust short cycling? protection tinuously for 10 minutes during operation of the inverter after 5 2) The heat exchanger is clogged.
  • Page 75 Checking code Meaning, detecting method Cause Checking method & Countermeasure 4260 Cooling fan If the heat sink temperature 1) Same as “4230.” Same as “4230.” trouble (THHS) 60°C for 10 minutes or longer just before the inverter starts. 5110 Radiator panel If a heat sink temperature of 1) The THHS Sensor is defective.
  • Page 76 Checking code Meaning, detecting method Cause Checking method & Countermeasure Discharge <Other than THHS> 1) Thermistor 5101 Check the thermistor’s resistance. (TH1) 1 A short in the thermistor or an open circuit was sensed. 2) Lead wires are being pinched. Check if the lead wires are pinched.
  • Page 77 Communication/system Checking Meaning, detecting method Cause Checking method & Countermeasure code 6600 Multiple address error 1) Two or more controllers of out- At the genration of 6600 error, release the error door unit, indoor unit, remote con- by remote controller (with stop key) and start Transmission from units with troller, etc.
  • Page 78 Checking Meaning, detecting method Cause Checking method & Countermeasure code 6602 Transmission processor Checking method and processing hardware error Transmission line Shut off the power source of outdoor/in- installed while turning door units/BC controller and make it again. power source on? Check power source of in- door unit.
  • Page 79 Checking Meaning, detecting method Cause Checking method & Countermeasure code 6606 Communications with 1) Data is not properly transmitted Turn off power sources of indoor unit and outdoor transmission processor due to casual errouneous opera- unit. error tion of the generating controller. When power sources are turned off sepa- 2) Faulty generating controller.
  • Page 80 Checking Meaning, detecting method code 6607 When no ACK signal is detected in 6 continuous times with 30 second interval by transmission No ACK error side controller, the transmission side detects error. Note: The address/attribute shown on remote controller indicates the controller not providing the answer (ACK).
  • Page 81 Checking Meaning, detecting method code No ACK error When no ACK signal is detected in 6 continuous times with 30 second interval by transmission 6607 (continued) side controller, the transmission side detects error. Note: The address/attribute shown on remote controller indicates the controller not providing the answer (ACK).
  • Page 82 Checking Meaning, detecting method code 6607 When no ACK signal is detected in 6 continuous times with 30 second interval by transmission No ACK error (continued) side controller, the transmission side detects error. Note: The address/attribute shown on remote controller indicates the controller not providing the answer (ACK).
  • Page 83 Checking Meaning, detecting method code 6607 When no ACK signal is detected in 6 continuous times with 30 second interval by transmission No ACK error (continued) side controller, the transmission side detects error. Note: The address/attribute shown on remote controller indicates the controller not providing the answer (ACK).
  • Page 84 Checking Meaning, detecting method Cause Checking method & Countermeasure code a) Generation at test run 6608 No response error 1) At the collision of mutual transmis- Turn off the power sources of OC unit, IC unit sion data when transmission and Fresh Master for more than 5 minutes Though acknowledgement of wiring is modified or the polarity is...
  • Page 85 Checking Meaning, detecting method Cause Checking method & Countermeasure code 7102 2) The Outdoor unit address is being a) Check for the model total (capacity code total) Connected unit count over set to 51~100 under automatic of indoor units connected. address mode (Remote controller displays “HO”).

  • Page 86: Led Monitor Display

    [3] LED Monitor Display E: E2 Contents stored in the E2PROM; M: Monitored by the IC through communications; E*: Stored in service memory. Item Display Remarks 12345678910 LD8 is a relay output indicator which 0000000000 Relay Output COMP Crank- 21S4 Lights for lights u at all times when the Display 1 (Lights...
  • Page 87 Item Display Remarks 12345678910 Lights up if an error 1010100000 Outdoor Unit High Outlet Overcur- Heat Sink Overcur- Refrigerant delay has occurred Preliminary Error Pressure Pressure Tempera- rent Thermostat rent Over- between the time the History Error 1, 2 Error ture Error Protection Operation...
  • Page 88 Item Display Remarks 12345678910 0010110000 THHS Data -99.9 ~ 999.9 ↑ 1010110000 HPS Data ↑ 0110110000 TH7 Data ↑ 1110110000 TH8 Data 0001110000 1001110000 0101110000 1101110000 Accumulator Level 0~9 (“AL=” is also displayed) ∆ AK ∆ AK ∆ Hz ∆ Hz ∆...
  • Page 89 When there is an error stop with No92-111, the data on error stops or the data immediately before the error postponement stop, which is stored in service memory, are displayed. Item Display Remarks 12345678910 ↑ 11101010 IC14 address 00011010 IC15 address 0000 ~ 9999 ↑...
  • Page 90 Item Display Remarks 12345678910 10101110 IC6 inlet temperature -99.9 ~ 999.9 ↑ 01101110 IC7 inlet temperature ↑ 11101110 IC8 inlet temperature ↑ 00011110 IC9 inlet temperature ↑ 10011110 IC10 inlet temperature ↑ 01011110 IC11 inlet temperature ↑ 11011110 IC12 inlet temperature. ↑...
  • Page 91 Item Display Remarks 12345678910 11011001 IC12 gas piping temp. -99.9 ~ 999.9 ↑ 00111001 IC13 gas piping temp. ↑ 10111001 IC14 gas piping temp. ↑ 01111001 IC15 gas piping temp. ↑ 11111001 IC16 gas piping temp. ↑ 00000101 IC1SH ↑ 10000101 IC2SH ↑...
  • Page 92 Item Display Remarks 12345678910 01000011 IC3 LEV Opening -99.9 ~ 999.9 ↑ 11000011 IC4 LEV Opening ↑ 00100011 IC5 LEV Opening ↑ 10100011 IC6 LEV Opening ↑ 01100011 IC7 LEV Opening ↑ 11100011 IC8 LEV Opening ↑ 00010011 IC9 LEV Opening 10010011 IC10 LEV Opening ↑...
  • Page 93 Item Display Remarks 12345678910 00010111 IC9 capacity code 0000 ~ 9999 ↑ 10010111 IC10 capacity code ↑ 01010111 IC11 capacity code ↑ 11010111 IC12 capacity code ↑ 00110111 IC13 capacity code ↑ 10110111 IC14 capacity code ↑ 01110111 IC15 capacity code ↑...
  • Page 94 Service Handbook PUHY-80TMU-A, 100TMU-A New publication effective March 2004. Issued in March 2004 Specifications subject to change without notice.
  • Page 95 3400 Lawrenceville Suwanee Road Suwanee, Georgia 30024 ● Toll Free: 800-433-4822 Toll Free Fax: 800-889-9904 ● www.mrslim.com Specifications are subject to change without notice.

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