Panasonic U-10MF1E8 Service Manual Download Page 48

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3-WAY SYSTEM

Outdoor Unit Repair Procedures

- 4

2. Removing Electrical Component Box and Duct

(7)

Remove the lower duct. (2 screws, 1 tab) (Fig. 5-1)

(8)

Remove the upper duct. (3 screws) (Fig. 5-2)

Fig. 5-1

Fig. 5-2

Lower duct

Upper duct

SM830188-00̲3WAY.indb 4

2011/03/01 11:55:52

Summary of Contents for U-10MF1E8

Page 1: ...6MD1E5 S 45MD1E5 S 56MD1E5 S 73MD1E5 F1 Low Silhouette Ducted S 28MF1E5 S 36MF1E5 S 45MF1E5 S 56MF1E5 S 73MF1E5 S 106MF1E5 S 140MF1E5 S 160MF1E5 S 22MF1E5 S 90MF1E5 T1 Ceiling S 36MT1E5 S 45MT1E5 S 56...

Page 2: ...stallation The manufacturer shall in no way be responsible for improper installation or maintenance service including failure to follow the instructions in this document SPECIAL PRECAUTIONS WARNING Wh...

Page 3: ...while piping work for an installation or re installation and while repairing refrigeration parts Handle liquid refrigerant carefully as it may cause frostbite When Servicing mains before opening the u...

Page 4: ...by curtailing heat and carrying power etc Most importantly the multi air conditioner system is able to replenish a large amount of refrigerant compared to conventional individual air conditioners If...

Page 5: ...REPAIR PROCEDURES 2 1 1 Removing Panels 2 2 2 Removing Electrical Component Box and Duct 2 3 3 Discharging Compressor Oil 2 5 4 Backup Operation 2 6 5 Recovering Refrigerant 2 9 6 Checking for Leakage...

Page 6: ...D Display 5 4 3 Remote Controller Servicing Functions 5 5 4 3 WAY Alarm Codes 5 7 5 Blinking Inspection Display 5 27 6 Inspection of Parts 5 29 7 Test Pin 5 30 8 Symptom Thermostat in OFF continues or...

Page 7: ...MOV3 MOV4 1 19 8 Outdoor Fan Control 1 21 9 Demand Control 1 22 10 Indoor Unit Control of the Electronic Control Valve 1 23 11 Solenoid Valve Kit Control 1 25 12 Indoor Special Control 1 26 13 Discha...

Page 8: ...ssary No of indoor units 1 1 40 units 1 Not necessary No of outdoor units 1 1 3 units 1 Not necessary Unit No 1 Unit No 1 1 Unit Nos 2 3 This system can be expanded to connect a maximum of 3 outdoor u...

Page 9: ...control device all systems will begin operating simultaneously For this reason a function is included to delay the start time for each system address when systems are linked and multiple systems are s...

Page 10: ...ls The A C units are selected with consideration for the maximum load Therefore in most cases the maximum capacity is not required Ordinarily the operating range of an inverter compressor is approxima...

Page 11: ...hich are described later 3 6 Roadmap Control 1 The below controls are performed according to the pressure sensor on the outdoor unit and the 2 temperature sensors attached to the indoor unit heat exch...

Page 12: ...rant temperature 3 For 6 minutes after the compressors start area C is considered to be area B for control purposes 4 During special control control of the compressor capacity according to Te is not p...

Page 13: ...rature Te for the Cooling mode indoor units of 2 6 C and a target condensation temperature Tc for the Heating mode indoor units of 48 51 C Heat balance control is performed by varying the compressor c...

Page 14: ...c The amount of heat discharge at the outdoor unit heat exchanger increases increasing the heat intake at the Cooling mode indoor units and lowering the evaporation temperature Te Primarily when both...

Page 15: ...ator Low Condensation Temp Tc High A B C D Low Evaporation Temp Te High A STAY DOWN Compressor stop B Target C UP STAY STAY STAY STAY UP STAY 3 6 4 Protection control Protection control consists of 2...

Page 16: ...Thermostat OFF Operation stops for 100 ms for current protection 26 5 14 5 18 5 Horsepower decreased 25 14 Less than 14 5 Prohibit horsepower increase 24 Less than 14 Permit horsepower increase 3 6 5...

Page 17: ...is finished normal operation starts at the horsepower determined by the indoor units where thermostats are ON 2 Control when outdoor unit heat exchanger is acting as a condenser when all units are in...

Page 18: ...e indoor unit operation mode 4 3 Defrost Control 4 3 1 Defrost control method This system uses the following 2 defrost methods 1 If there is 1 outdoor unit in the refrigerant system Reverse cycle defr...

Page 19: ...forms E C for 3 minutes after defrost ends Therefore the thermostat remains OFF for 3 minutes 1 Function when a common use solenoid valve kit is used and there are more than one 1 indoor unit in the c...

Page 20: ...n Second operation Defrost flow E Evaporator operation C Condenser operation S Shut off E C Switching from evaporator operation to condenser operation C E Switching from condenser operation to evapora...

Page 21: ...er if there is any other outdoor unit where the defrost end condition has not been met defrost control continues for all outdoor units and system defrost control is not ended Condition 2 The maximum d...

Page 22: ...oil level is 0 Both the balance valve and recovery valve turn ON and remain ON 5 1 4 Unit refrigerant oil recovery control utilizing balance tubes If the low oil level continues that outdoor unit oil...

Page 23: ...e when the outdoor unit heat exchanger is functioning as an evaporator When the valve determines that there are signs of excess refrigerant refrigerant is recovered at the receiver tank This valve is...

Page 24: ...s B This valve is ON when unit refrigerant oil recovery control is in progress oil receiving unit C This valve is ON when control for insufficient gas is in progress D This valve turns ON for 60 secon...

Page 25: ...status MOV1 MOV2 MOV3 Remarks All indoor units in Cooling mode Condensor 480 480 480 Maximum flow control Stopped 0 0 0 Refrigerant shut off All indoor units in Heating mode Evaporator 45 480 15 480...

Page 26: ...low pressure sensor located near the accumulator to perform control in order to prevent liquid back up 2 Operation when discharge temperature is high When the discharge temperature increases the SC ci...

Page 27: ...sed when the pressure sensor temperature is 50 C or higher B The fan mode may be decreased when symptoms of insufficient gas are detected at an indoor unit 2 Heating mode at all indoor units or else m...

Page 28: ...ontact 2 No control Operates to maximum capacity Rated current Operates at up to 70 of rated current Shutdown state Input present Input not present The rated current indicates the current value that i...

Page 29: ...operation Outdoor unit stopped Thermostat ON Thermostat OFF Thermostat ON Thermostat OFF Thermostat ON Thermostat OFF Thermostat ON Thermostat OFF Fan Stop Cooling Heating Auto Auto Cooling Auto Heati...

Page 30: ...according to indoor unit capacity However position is 20 pulses for type E1 Thermostat OFF Thermostat OFF Thermostat ON Thermostat OFF Heating Cooling Heating Thermostat ON Fixed pulse for cooling ac...

Page 31: ...t 1 Cooling 2 Heating 1 Cooling 2 Heating Stopped OFF OFF ON ON OFF OFF OFF ON OFF ON ON OFF Discharge valve Remote Controller Mode Intake valve Balance valve EP valve evaporation temp control valve C...

Page 32: ...door unit the thermostat will not be turned OFF by the room temperature thermostat or discharge temperature thermostat for a period of 3 minutes However if the condensation temperature reaches or exce...

Page 33: ...90 90 90 Alarm display P03 P17 P18 2 Discharge sensor trouble detection control An alarm occurs if the discharge temperature remains abnormally high when the system has been stopped for 60 minutes In...

Page 34: ...pressor 2 12 1 13 7 10 hp Compressor 2 12 7 14 3 12 hp Compressor 2 12 7 14 3 14 hp Compressor 2 12 1 13 7 Compressor 3 12 1 13 7 16 hp Compressor 2 12 1 14 3 Compressor 3 12 7 14 3 List of Alarms Com...

Page 35: ...ccur if system oil recovery control has not already been performed However the alarm may not occur if the outdoor unit where the system oil recovery conditions were met is not the same as the outdoor...

Page 36: ...a failure in the pressure sensor first verify that the service valve was not accidentally left closed that there are no blocked cir cuits and that there is no leakage of refrigerant into stopped outd...

Page 37: ...outdoor units is required for special control or other system purposes 4 Alarm display If a wired remote controller is present the display blinks during operation 5 Canceling automatic backup operatio...

Page 38: ...he compressor to disable and turn ON the backup switch S010 switch In order to perform simultaneous backup operation for 2 or more compressors use a combination of the switch settings shown above INV...

Page 39: ...timer for quiet operation In this case operation is the Quiet mode determined by the above setting 18 2 Slime Countermeasure EEPROM 0C set only on the main unit This setting controls the operation of...

Page 40: ...the outdoor unit PCB is used for input from the snowfall sensor It is also possible to connect an external timer and use it to enable nighttime Quiet mode operation Setting Operation 0 Used for snowf...

Page 41: ...ng can make the alarm for communication error not occur in case of only one indoor unit powered off with the remote controller switched on Change the outdoor EEPROM setting item code 23 setting at eac...

Page 42: ...red and the outdoor fan does not operate 4 In the case of a 3 WAY SYSTEM control can be performed when snowfall sensor input is connected to any outdoor unit Caution Snowfall sensor input information...

Page 43: ...and Overcharge Judgment in automatic judgment mode can be problematic in some cases Therefore the following guidelines are provided for general judgment of the refrigerant amount Symptoms of insuffici...

Page 44: ...MEMO 1 38 SM830188 00 3WAY indb 38 SM830188 00 3WAY indb 38 2011 03 01 11 55 23 2011 03 01 11 55 23...

Page 45: ...il 2 5 4 Backup Operation 2 6 5 Recovering Refrigerant 2 9 6 Checking for Leakage After Repair 2 14 7 Evacuating System 2 15 8 Charging Compressor Oil 2 16 9 Pumping Out Refrigerant from Outdoor Unit...

Page 46: ...Pumping Out Refrigerant from Outdoor Unit when repairing parts other than compressor 10 Compressor 11 High and Low Pressure Sensors 12 Replacing 4 way valve 1 Front panel removal Fig 1 Remove the fron...

Page 47: ...nt box remove 2 screws Fig 4 Be sure to release the locking mechanism before disconnecting each connector 6 Remove the center duct Fig 5 The center duct is fitted into the upper and lower ducts and he...

Page 48: ...moving Electrical Component Box and Duct 7 Remove the lower duct 2 screws 1 tab Fig 5 1 8 Remove the upper duct 3 screws Fig 5 2 Fig 5 1 Fig 5 2 Lower duct Upper duct SM830188 00 3WAY indb 4 SM830188...

Page 49: ...ng the procedures in 5 Recovering Refrigerant Remove the compressor and discharge the oil in it Refer to 10 Compressor for detailed procedures 3 3 Checking the Oil Acceptance rejection criteria for th...

Page 50: ...o 1 outdoor unit main unit backup mode operation will continue after the repairs are completed Backup operation is intended as emergency operation until repairs are made Have repairs made as soon as p...

Page 51: ...ttings at other outdoor units No particular changes 2 Adjusting the refrigerant for backup operation During backup operation all of the service valves on the failed unit are closed However if a check...

Page 52: ...ry device and recover the refrigerant into a recovery cylinder in order to adjust the amount of refrigerant in the system 4 2 2 Backup operation by setting the failed compressor not to operate Backup...

Page 53: ...y unit and recovery cylinder using hoses To avoid the entry of air into the refrigerant tubing carry out this connection work carefully Fig 7 For detailed procedures such as connecting the refrigerant...

Page 54: ...g START 5 2 1 Cooling operation for all units Ball valve is provided in the indoor unit 5 2 2 Refrigerant recovery procedures 1 Turn off all equipment in system When replacing or repairing a faulty un...

Page 55: ...door unit remote controllers Check that all units are operating in Cooling mode 5 2 2 Refrigerant recovery procedures 1 using indoor unit ball valve 1 If a ball valve with a service port has been prov...

Page 56: ...all outdoor units stop operating Be sure that you do NOT grasp the lead wire when pulling out the connector Removing any other connector may not cause the units to stop Therefore be sure to pull out t...

Page 57: ...essure Check that each valve on the manifold gauge valves is tightly closed The connection port uses a Schrader type push to release valve 5 Connect the manifold gauge valves refrigerant recovery unit...

Page 58: ...ect for any leakage If there are any leaks bubbles will show on the tubing surface To continue the air tight check after the brief leak inspection turn on power while short circuiting the AP pins Agai...

Page 59: ...the AP pins and turning on power to the outdoor unit all electronic valves in the outdoor unit are forcibly opened and any remaining nitrogen gas can be recovered Failure to perform this procedure ma...

Page 60: ...ging work carefully so that no liquid refrigerant enters the charging tank 1 Evacuation drying in oil charging tank With the lower side valve fully closed open the upper side valve and connect it to t...

Page 61: ...to be oil charged and then connect the high pressure sensor outlet with push to release valve to the upper valve via the manifold gauge valves at Hi pressure gauge side In addition connect the suctio...

Page 62: ...can enter After charge the necessary amount of new refrigerant by referring to the Installation Instructions that came with the outdoor unit NOTE To determine the completion of refrigerant recovery f...

Page 63: ...KTYE SB Constant speed scroll compressor 2 2 1 2 When replacing a faulty compressor be sure to first measure the amount of remaining oil in the compressor Charge additional new oil equal to the differ...

Page 64: ...LU on the outdoor unit control PCB of the outdoor unit to be repaired Then start a test run of all units Press and hold the CHECK button for 4 seconds 4 Press the MODE button and change to heating ope...

Page 65: ...cient safety measures such as installing a high pressure cutout in the circuit The hoses may be subject to internal pressure from the refrigerant inside the outdoor unit Check that the manifold gauge...

Page 66: ...de of the manifold gauge to the high pressure outlet port on the outdoor unit to be repaired and connect the manifold gauge to the refrigerant recovery device Be sure that no air enters the tubing at...

Page 67: ...arts a Motor Min 300 M b Compressor Min 100 M servicing part c Unit Min 10 M This is due to the presence of refrigerant which decreases the insulation resistance Minimum insulation resistance as requi...

Page 68: ...th the same amount of new refrigerant has not been completed but no more refrigerant will enter the unit fully close the high pressure gauge valve on the manifold gauge Next turn the power OFF at the...

Page 69: ...e repaired outdoor unit then remove the short circuit at the AP pin CN102 Finally fully open all valves on the suction tube discharge tube liquid tube and balance tube However leave the balance tube f...

Page 70: ...t first turn the power OFF at the repaired outdoor unit then remove the short circuit at the AP pin CN102 Then fully open all valves on the suction tube discharge tube liquid tube and balance tube How...

Page 71: ...en recover the refrigerant from the tubing Be sure that no air enters the tubing at this time When the hose is connected internal pressure is applied by the remaining refrigerant in the inter unit tub...

Page 72: ...ocedures 2 for indoor unit with no ball valve under 5 2 Refrigerant Recovery Procedures Indoor Unit Perform pump down of the refrigerant from all indoor units and inter unit tubing to the outdoor unit...

Page 73: ...eplacement procedure below A Replacing the inverter compressor Compressor 1 on remote controller alarm display Remove the crankcase heater Remove the 3 bolts and remove the washers and rubber washers...

Page 74: ...it where the compres sor was replaced Connect the manifold gauge to a nitrogen cylinder and perform nitrogen gas replacement 10 Perform copper brazing at the 2 brazing locations 11 Follow the instruct...

Page 75: ...sor will be replaced Connect the manifold gauge to a nitrogen cylinder and perform nitrogen gas replacement Remove the cap at the compressor terminal plate Disconnect the power terminal Remove the cr...

Page 76: ...be caps 2 pieces from the compressor Remove hexagonal caps from the compressor When removing the hexagonal caps hold the fixing nut at the main unit side so as not to loose it with a wrench or spanner...

Page 77: ...r unit where the compres sor was replaced Connect the manifold gauge to a nitrogen cylinder and perform nitrogen gas replacement Perform copper brazing at the 3 brazing locations In the same way as du...

Page 78: ...compressor terminal plate Disconnect the power terminal Remove the crankcase heater Remove the bolts washers and rubber washers 1 each at 3 locations The compressor right inner leg is not anchored Pre...

Page 79: ...the oil equalizer tube connector parts It must be pro tected and do not lose it Remove the tube cap brazed 2 pieces from the new compressor Remove the hexagonal caps from the new compressor When remo...

Page 80: ...sed for 3 locations Cushion rubber remained 1 location Brazing locations 4 Cushioning rubber Bolt Temporary mounting back side 2 locations 1 piece each Protect the oil equalizer tube connection parts...

Page 81: ...the instructions in 7 Evacuating System and apply vacuum to the outdoor unit where the compres sor was replaced D Replacing multiple compressors Removal Follow the instructions in A Replacing the inve...

Page 82: ...pe valve 11 2 Removing the Low Pressure Sensor 1 Follow the instructions in 1 Removing Panels and 2 Removing Electrical Component Box and Duct Cover and remove the corresponding components from the ou...

Page 83: ...re outlet ports at the outdoor unit where the 4 way valve will be replaced Connect the manifold gauge to a nitrogen cylinder and perform nitrogen gas replace ment 4 Prepare the brazing kit to disconne...

Page 84: ...way valve will be replaced Connect the manifold gauge to a nitrogen cylinder and perform nitrogen gas replace ment 3 Prepare the brazing kit to disconnect the brazed parts 4 locations Protect the che...

Page 85: ...TENANCE REMOTE CONTROLLER 1 Overview 3 2 2 Functions 3 3 3 Ordinary Display Controls and Functions 3 4 4 Monitoring Operations 3 9 5 Outdoor Unit Alarm History Monitor 3 11 6 Mode Settings 3 12 SM8301...

Page 86: ...s operating mode etc NOTE Outdoor unit maintenance remote controller does not function as an ordinary remote controller It is therefore only used for test runs and during servicing The special service...

Page 87: ...it Nos of connected indoor outdoor units Indoor outdoor unit operating status blinks when an alarm occurs Indoor unit thermostat ON Display of individual outdoor unit alarms Total operating time of ou...

Page 88: ...nected it can be left as is In case of an independent outdoor unit 1 maintenance remote controller connected to 1 outdoor unit automatic address setting for indoor units not completed both setting mod...

Page 89: ...door unit PCBs The display shows the operating mode of the indoor unit with the lowest unit No All units test run Fig 2 Operation The CHECK button switches test run ON OFF for all indoor units Press a...

Page 90: ...ting time 0 99999999 hrs Compressor 3 operating time 0 99999999 hrs Compressor 1 oil level 0 Empty 1 Insufficient 2 Sufficient Compressor 2 oil level 0 Empty 1 Insufficient 2 Sufficient Compressor 3 o...

Page 91: ...oor system address on main bus line 1 30 YY Outdoor unit sub bus address 1 8 1 appears when there is only 1 outdoor unit LED 1 2 3 Locations where and are displayed as shown in Fig 3 01 No of connecte...

Page 92: ...nds have not passed The total compressor operating time is displayed in 1 hour units using 8 digits When the first 4 digits are displayed the bottom dot of the colon is lit Figure A When the last 4 di...

Page 93: ...display and operations are the same as when monitor mode is started from the unit remote controller Press the button and select the indoor unit to monitor Use the temperature setting and buttons to s...

Page 94: ...iquid 1 C Heat exchanger gas 2 C Heat exchanger liquid 2 C Outdoor air temp C Not used Inverter primary current A CT2 A Outdoor unit MOV1 pulse STEP MOV2 pulse STEP Discharge temp 3 C CT3 A MOV3 pulse...

Page 95: ...ton and select the outdoor unit for alarm history monitoring Use the temperature setting and buttons to select the item code for the alarm history The display shows the address of the selected outdoor...

Page 96: ...de press the CHECK button 1 2 3 5 5 3 1 2 A and B are displayed alternately Example shows display of 0000 0001 A Display of first 4 digits B Display of last 4 digits DN Parameter Description Snowfall...

Page 97: ...System address YY Address at outdoor unit sub bus item code number DN value in the table below and the setting data 8 digits The setting data is displayed in 8 digits The display changes between the f...

Page 98: ...MEMO 3 14 SM830188 00 3WAY indb 14 SM830188 00 3WAY indb 14 2011 03 01 11 56 28 2011 03 01 11 56 28...

Page 99: ...tions 4 1 4 REMOTE CONTROLLER FUNCTIONS 1 Simple Settings Function 4 2 2 Detailed Settings Function 4 4 3 Remote Controller Servicing Functions 4 15 SM830188 00 3WAY indb 1 SM830188 00 3WAY indb 1 201...

Page 100: ...er LCD display Fig 1 At this time the indoor unit fan or all indoor unit fans in the case of group control begins operating If group control is in effect press the button and select the address unit N...

Page 101: ...D LO 0002 LO LO 0004 MED 1 min LO 3 min MED 0005 MED MED 0006 LO MED Heating intake temperature shift 0000 No shift 0001 Shifts intake temperature 1 C down 0002 Shifts intake temperature 2 C down 0003...

Page 102: ...tem code and settings data are displayed blinking on the remote controller LCD display Fig 2 At this time the indoor unit fan or all indoor unit fans in the case of group control begins operating If g...

Page 103: ...001 Unit No 1 0002 Unit No 2 0003 Unit No 3 0064 Unit No 64 0099 Not set Group control address 0000 Individual 1 1 Indoor unit with no group wiring 0001 Main unit One of the group control indoor units...

Page 104: ...pper limit at shipment Upper limit Drying 0018 18 C Lower limit at shipment 0019 19 C Lower limit 0029 29 C 0030 30 C Upper limit at shipment Upper limit Auto heat cool 0017 17 C Lower limit at shipme...

Page 105: ...cold air 0013 Control temperature 13 C 0014 Control temperature 14 C 0025 Control temperature 25 C 0026 Control temperature 26 C Fan output switching 0000 Output linked with fan ON when indoor unit fa...

Page 106: ...inuously ON Repeat timer switching 0000 Function disabled 0001 Function enabled Timer function change prohibit 0000 Function disabled 0001 Function enabled Smudging control 0000 No smudging control Se...

Page 107: ...500 2500 1250 0002 2 Way cassette L1 2500 1250 10000 5000 2500 1250 2500 1250 0003 1 Way cassette D1 2500 1250 0005 Low Silhouette Ducted F1 Slim Low Static Ducted M1 1250 5000 2500 2500 1250 5000 250...

Page 108: ...re are multiple remote controllers in the same refrigerant system it is possible to set one remote controller as the priority remote controller the remote controller which is given priority for select...

Page 109: ...ke temperature shift Shifts the intake temperature during heating Can be set when the body thermostat is used 07 Electric heater installation Set when cost distribution is performed using an AMY centr...

Page 110: ...ped after operation starts can be set in increments of 5 minutes 1C Cooling discharge temperature shift Shifts the set value for models which perform discharge temperature control Discharge temperatur...

Page 111: ...r fire prevention input 31 Ventilation fan operation from remote controller It is possible to install a total heat exchanger and ventilation fan in the system which can be started and stopped by the w...

Page 112: ...5d DC fan tap setting Sets the DC fan tap according to the purpose of use Change the settings data at the same time 5E Humidifier ON time Sets the humidifier output ON time for when the humidifier is...

Page 113: ...onger Simple settings Filter lifetime operating mode priority central control address and other settings Press and hold the and buttons for 4 seconds or longer When settings are made from a remote con...

Page 114: ...he thermostat forced ON Procedure Press and hold the button for 4 seconds or longer Test appears on the remote controller LCD display Fig 3 Start operation Press the button to return to normal remote...

Page 115: ...sensor addresses and sensor types refer to the table of temperature sensors and addresses on the next page If group control is in effect press the button to select the unit to monitor Press the tempe...

Page 116: ...anger gas 1 0E 2E 4E Heat exchanger liquid 1 0F 2F 4F Heat exchanger gas 2 10 30 50 Heat exchanger liquid 2 11 31 51 Outdoor air temp 12 32 52 13 33 53 For inspection 14 34 54 CT2 15 35 55 For inspect...

Page 117: ...ol Panel LED Display 5 4 3 Remote Controller Servicing Functions 5 5 4 3 WAY Alarm Codes 5 7 5 Blinking Inspection Display 5 27 6 Inspection of Parts 5 29 7 Test Pin 5 30 8 Symptom Thermostat in OFF c...

Page 118: ...address setting was started E12 Indoor unit communication error of group control wiring Error of main indoor unit in receiving serial communication signal from sub indoor units E18 During auto address...

Page 119: ...more P26 Start failure caused by compressor wire missing phase DCCT failure or similar problem INV compressor start failure P29 Failure of nonvolatile memory IC EEPROM on indoor unit control PCB F29...

Page 120: ...the power is turned ON and automatic address setting is not in progress the number of detected indoor units connected to that system matches the number that was set and regular communications are occu...

Page 121: ...perature setting and buttons to change the item code to the sensor address of the sensor you wish to monitor For the relationship between the sensor address and sensor type refer to the sensor tempera...

Page 122: ...Indoor unit heat exchanger temperature E3 Outdoor unit Unit No 1 Unit No 2 Unit No 3 Unit No 1 Unit No 2 Unit No 3 Discharge temperature 1 Discharge temperature 3 Discharge temperature 2 CT3 High pres...

Page 123: ...ure sensor trouble 5 15 F17 Low pressure sensor trouble 5 16 F23 Gas temperature sensor trouble at outdoor heat exchanger 2 In 5 13 F24 Liquid temperature sensor trouble at outdoor heat exchanger 2 Ou...

Page 124: ...P17 Compressor 2 discharge temperature trouble 5 24 P18 Compressor 3 discharge temperature trouble 5 24 P22 Fan motor trouble 5 26 P26 Inverter compressor high frequency overcurrent alarm 5 26 P29 In...

Page 125: ...tting was in progress at another outdoor unit in the same link Probable cause Automatic address setting is in progress at another outdoor unit Check This alarm is not displayed on the remote controlle...

Page 126: ...no indoor units were recognized Probable cause 1 The inter unit control wiring from the outdoor unit to the indoor units has been cut 2 Serial connector 1 CN001 is disconnected at the outdoor unit 3 T...

Page 127: ...ntity setting again 2 Check the outdoor unit main sub control wiring Correction 1 Correct the incorrect outdoor unit quantity setting 2 Repair the outdoor unit main sub control wiring Example Notes Re...

Page 128: ...tes suddenly and wildly In some cases the precise temperature may not be known even when monitoring software is used Check Wiggle the sensor and check whether the trouble continues Check whether the c...

Page 129: ...this alarm is to facilitate identification of the problem in this case F06 F23 F25 Alarm Alarm code F06 F23 F25 Alarm meaning Gas temperature sensor trouble at outdoor heat exchanger 1 Gas temperatur...

Page 130: ...the temperature that is recognized by the microcomputer Correction Example Notes F12 Alarm Alarm code F12 Alarm meaning Compressor intake temperature sensor trouble Alarm conditions 1 A D step is 10 s...

Page 131: ...ck whether the temperature is lower than the highest indoor unit E1 temperature The pressure detected by the high pressure sensor is the highest pressure in the system Therefore during heating the con...

Page 132: ...room temperature However be aware that this kind of data results often when there is a height difference between indoor units Reducing the amount of refrigerant will improve the refrigerant flow howe...

Page 133: ...hase where the CT circuit is connected Check voltage and current 3 Missing power phase Trouble This alarm primarily occurs when the T phase is missing When the R phase or S phase is missing CT trouble...

Page 134: ...se a normal CT as a tool to determine whether the trouble is a PCB failure or CT failure H05 H15 H25 Alarm Alarm code H05 H15 H25 Alarm meaning Compressor 1 discharge temperature sensor disconnected C...

Page 135: ...gh pressure that may be insufficient to cause refrigerant flow 3 The refrigerant circuit has become closed and refrigerant has not returned to the compressor In some cases when moisture enters the ref...

Page 136: ...l foaming may increase oil discharge The same occurs when the refrigerant proportion in the compressor is high at start due to an open circuit in the crank case heater 7 Oil sensor disconnected or ope...

Page 137: ...nd ground HIC If there is a short circuit there is an HIC malfunction Correction If an HIC failure is found replace the PCB Example Notes Turn OFF the power and check the continuity of HIC and HIC on...

Page 138: ...kit Remote control group wiring with a different refrigerant circuit in the indoor unit In this case L11 alarm occurs at all indoor units remote controllers Check 1 1 When setting installation of comm...

Page 139: ...correct however the refrigerant type setting in the outdoor unit EEPROM item code 80 is incorrect Check 1 Check the refrigerant type at the connected unit 2 Use the outdoor unit maintenance remote co...

Page 140: ...ating When the liquid valve turns ON the discharge temperature of the other compressor decreases 5 Accumulation of refrigerant in stopped outdoor units Trouble System is OK when all outdoor units are...

Page 141: ...for outdoor fan failure Check whether the screws securing the fan are loose and whether the fan connector in the outdoor unit PCB is properly connected 6 During heating check whether the air filters i...

Page 142: ...ry or secondary current or when an instantaneous secondary current of 48 A or higher is detected Probable cause The detection methods are the same as for P16 However the fact that operation up to high...

Page 143: ...nking inspection display also occurs when seizing of the compressor magnet SW is detected Because this may also be the case refer to Blinking inspection display compressor magnet SW seizing detection...

Page 144: ...operation are poor difficult to open When a magnet SW is used in a DC circuit it may be difficult for the SW to open at times In an AC circuit the magnet SW should open instantaneously as long as the...

Page 145: ...played is approximately 4 V then the voltage is normal When the voltage is normal measure the resistance between each pair of pins on the electronic control valve connector The connector is normal if...

Page 146: ...alve 2 SCV2 12 Relay RY023 Pressure balance valve 2 PBV2 3 Relay RY021 Discharge valve 2 DCV2 13 Relay RY003 Crank case 2 CH2 4 Relay RY020 Discharge valve 1 DCV1 14 Relay RY002 Crank case 1 CH1 5 Rel...

Page 147: ...ional status 2 2 Yes No 2 2 Discharge temperature is over 80 C in stop mode and does not decrease Connect outdoor maintenance remote controller to RC socket on outdoor unit main control PC board and c...

Page 148: ...MEMO 5 32 SM830188 01 3WAY indb 32 SM830188 01 3WAY indb 32 2011 11 15 23 04 33 2011 11 15 23 04 33...

Page 149: ...201111 SM830188 01 3WAY indb 1 SM830188 01 3WAY indb 1 2011 11 15 23 23 06 2011 11 15 23 23 06...

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