Panasonic U-20ME1E81 Service Manual Download

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2WAY SYSTEM

Outdoor Unit Repair Procedures

4. Recovering Refrigerant

High-pressure outlet port
(for ø7.94mm-dia connector)

Liquid tube service port
(for ø7.94mm-dia connector)

Gas tube service port

(for ø7.94mm-dia connector)

Type 14HP / 16HP

Refrigerant recovery cylinder

Refrigerant

recovery uni

Manifold

gauge

Lo Hi

Low-pressure outlet port

(for ø7.94mm-dia connector)

Fig. 3-b

Fig. 3-c

Low-pressure outlet port

(for ø7.94mm-dia connector)

Liquid tube service port

(for ø7.94mm-dia connector)

Gas tube service port

(for ø7.94mm-dia connector)

Type 18HP / 20HP

Refrigerant recovery cylinder

Refrigerant

recovery unit

Manifold

gauge

Lo Hi

High-pressure outlet port

(for ø7.94mm-dia connector)

SM830204-05_2WAY SYS_new.indb 9

15/01/05 15:31:30

Summary of Contents for U-20ME1E81

Page 1: ... S 28MP1E5 S 28MY1E5 S 28MF2E5 S 28MM1E5 36 S 36MU1E5 S 36MU1E51 S 36ML1E5 S 36MF1E5 S 36MD1E5 S 36MK1E5 S 36MR1E5 S 36MP1E5 S 36MY1E5 S 36MF2E5 S 36MM1E5 S 36MT1E5 45 S 45MU1E5 S 45MU1E51 S 45ML1E5 S 45MF1E5 S 45MD1E5 S 45MK1E5 S 45MR1E5 S 45MP1E5 S 45MY1E5 S 45MF2E5 S 45MM1E5 S 45MT1E5 56 S 56MU1E5 S 56MU1E51 S 56ML1E5 S 56MF1E5 S 56MD1E5 S 56MK1E5 S 56MR1E5 S 56MP1E5 S 73ME1E5 S 106ME1E5 S 140M...

Page 2: ... 0 290 Pay close attention to all warning and caution notices given in this manual WARNING This symbol refers to a hazard or unsafe practice which can result in severe personal injury or death CAUTION This symbol refers to a hazard or unsafe practice which can result in personal injury or product or property damage If Necessary Get Help These instructions are all you need for most installation sit...

Page 3: ... gas with a flame as this will cause the generation of poisonous gas Keep all tubing runs as short as possible Use the flare method for connecting tubing Check carefully for leaks before starting the test run Do not leak refrigerant while piping work for an installation or re installation and while repairing refrigeration parts Handle liquid refrigerant carefully as it may cause frostbite When Tra...

Page 4: ...ntally Do not stick any object into the FAN CASE You may be injured and the unit may be damaged When Servicing Turn the power OFF at the main power box mains wait at least 10 minutes until it is discharged then open the unit to check or repair electrical parts and wiring Keep your fingers and clothing away from any moving parts Clean up the site after you finish remembering to check that no metal ...

Page 5: ... conditioner systems is on the increase because of the need for effective use of floor space individual control energy conservation 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 a single unit of the multi air conditioner system is to be installed ...

Page 6: ...rant only in liquid form 2 1 Since R410A is a non azeotrope recharging the refrigerant in gas form can lower performance and cause defects in the unit 2 2 Since refrigerant composition changes and performance decreases when gas leaks collect the remaining refrigerant and recharge the required total amount of new refrigerant after fixing the leak 3 Different tools required 3 1 Tool specifications h...

Page 7: ...ture Control 2 2 2 Heating Standby 2 4 3 Automatic Fan Speed Control 2 5 4 Indoor Unit MOV Control 2 6 5 Drain Pump Control 2 6 6 Automatic Heating Cooling Control 2 7 7 Discharge Air Temperature Control 2 8 8 RAP Valve Kit Control 2 8 9 Automatic Flap Control 2 9 10 Filter Sign 2 9 11 Electric Heater Control 2 10 12 Fan Control during Dry Mode 2 10 13 Ventilation Fan Output 2 11 14 T10 Terminal 2...

Page 8: ...ple Settings Function 5 2 2 Detailed Settings Function 5 8 3 Remote Controller Servicing Functions 5 21 Section 6 TROUBLE DIAGNOSIS 6 1 1 Contents of Remote Controller Switch Alarm Display 6 2 2 Outdoor Unit Control Panel LED Display 6 4 3 Remote Controller Servicing Functions 6 5 4 2WAY Alarm Codes 6 8 5 Blinking Inspection Display 6 29 6 Inspection and Characteristics of Parts 6 31 7 Test Pin 6 ...

Page 9: ...r Control 1 4 4 Output of PCB 1 11 5 Outdoor Fan Control 1 16 6 Indoor Units Control from the CCU 1 19 7 Oil Control 1 22 8 4 Way Valve Adjustment Control 1 26 9 Defrost Control 1 27 10 Upper Current Limitation Mode 1 31 11 Alarm Information 1 33 12 Backup Operation 1 37 13 Other Functions 1 41 14 Detailed Settings in EEPROM of Outdoor Unit 1 44 Contents ...

Page 10: ...tire system This outdoor unit is main outdoor unit For the main outdoor unit perform all the settings in the table below Sub outdoor unit The outdoor unit where the unit No is set to other than 1 is a sub outdoor unit The system will not operate if no outdoor unit has been set as unit No 1 Required settings Factory preset mode Main outdoor unit On site setting Sub outdoor unit On site setting Syst...

Page 11: ...art timing of each system can be delayed In order to enable this delay time it must be set in the EEPROM for each system Main outdoor unit Those systems Main outdoor units where this setting has been made will start after a delay according to their system addresses To activate this delay start function it is necessary to set it to EEPROM on main outdoor PCB EEPROM setting in main outdoor unit CODE...

Page 12: ...2 2 Priority order of inverter compressors The priority order of the inverter compressor with the least operating time is high The comparison is made among inverter compressors other than ones stopped because of protection control or forced stop 3 2 3 Priority order of constant speed compressors The priority order of Compressor 2 is higher than that of Compressor 3 3 2 4 Priority order between Com...

Page 13: ... conditioning decreases The last compressor to stop operating is the inverter with the shortest amount of operating time 3 3 Delay start of each compressor To decrease the load of power supply facility it is possible to delay start of each compressor 3 3 1 Delay start of compressor in the same system When the inverter compressor and the constant speed compressor start at the same time the inverter...

Page 14: ... is performed every 30 seconds Required level of each indoor unit Required level of indoor unit is calculated by difference between preset temperature in remote controller and intake temperature of indoor unit that is called DTi difference between preset discharge air temperature in EEPROM on indoor unit PCB and discharge air temperature of indoor unit that is called DTo Required level has 0 to 30...

Page 15: ...p in all states except alarm appearing The test run will finish automatically in about one hour Compressor capacity can increase 6 5 Te_tgt_max Compressor capacity cannot increase Compressor capacity decreases Max required level 15 0 6 0 3 0 deg 2 5 Te_tgt_min 6 0 3 0 16 0 13 0 30 11 0 8 0 B area C area A area Evaporation temperature area Condensation temperature area at cooling operation 3 6 2 Co...

Page 16: ...t_min deg B area A area C area PX is usually fixed to 58deg If the high pressure goes up rapidly after the compressor starts the system experiences urgent stop The next time the system will start with lower PX In the B area the compressor capacity changes depending on the refrigerant condition When the system operates in a minimum capacity the system will continue operating for at least 6 minutes ...

Page 17: ... 25 MPa 0 17 MPa Capacity goes up slowly Capacity cannot increase Capacity goes down 0 20 MPa No restriction 3 7 3 Overcurrent protection of compressor Current limitation of compressor is shown in the table below This limitation is to protect the compressor so that the current of the power cable connected with the compressor is limited For the inverter compressor this is the secondary current from...

Page 18: ...y of inverter compressor can increase Frequency of inverter compressor cannot increase Max current 1H Reference Inverter layout Diode Bridge Power Source IPM FN Magnet SW Noise Filter L3 L1 L2 Noise Filter IPM CM Fan Motor Compressor W U V W U V Primary CT Secondary CT When restarting after stopping by protection control the compressor capacity will increase slowly 2WAY SYSTEM Control Functions Ou...

Page 19: ... maintains the same state just before However when the system stopped condition continues for 30 minutes it is turned OFF 4 2 SAVE valve SAVE This valve turns ON for 5 seconds before the inverter compressor starts After the inverter compressor starts the valve turns ON for 10 seconds After that it turns OFF This valve turns ON for 30 seconds after the outdoor unit stops After that it turns OFF Thi...

Page 20: ...on The heat exchanger of outdoor unit is evaporator in heating operation This valve turns OFF when the excessive refrigerant is in the condenser The heat exchanger of indoor unit is condenser in heating operation The heat exchanger of outdoor unit is condenser in cooling operation This valve turns OFF when the outdoor unit is stopped This valve might turn ON when special control is in progress Eva...

Page 21: ... OFF it will not turn ON again for 15 minutes Condenser RBV RCV LP HP Over charge condition Receiver tank holds small amount of refrigerant Liquid flow Two phase flow Condenser RBV RCV LP HP Adequate condition Refrigerant gas in the top of receiver tank is pulled into low pressure side ON Liquid flow Two phase flow 4 5 Oil recovery valve ORVR This valve is for recovering oil from the oil separator...

Page 22: ...CODE 0B Function of EXCT plug short circuit Indoor unit does thermostat OFF factory preset mode Indoor unit gives P14 alarm and transmits the refrigerant leakage signal 4 8 MOV for heat exchanger MOV1 MOV2 4 8 1 Type of Motor Operated Valves Outdoor unit Capacity 8HP 10HP 12HP 14HP 16HP 18HP 20HP MOV1 For heat exchanger in upper row For left side heat exchanger MOV2 For heat exchanger in lower row...

Page 23: ...pressor in the liquid state SH in suction that is difference between the SCG temperature and low pressure sensor temperature is adjusted to 3 5 C 4 9 2 Discharge temperature control of compressor When the discharge temperature increases to 95 C or more MOV 4 opens to 100 pulses to cool down the compressor MOV 4 operates according to the state of the discharge temperature between 20 480 pulses This...

Page 24: ... been set For information concerning EEPROM settings refer to the field application functions The following table shows the maximum and minimum fan mode and fan forced mode for each unit Control Functions Outdoor Unit For the sake of protecting temperature of the electrical parts the minimum values of the fan mode may sometimes increase in accordance with the ambient temperature Standard 10 C Ambi...

Page 25: ...ps for 2 hours when ambient temperature is 5 1 C or more Fan motor operates for 45 seconds and stops for 1 5 hours when ambient temperature is 0 1 5 0 C Fan motor operates for 45 seconds and stops for 1 hour when ambient temperature is 0 0 C or less To activate this function it is necessary to set it to all EEPROMs on outdoor PCBs CODE 04 Setting No Operation 0 1 2 3 Snow detection sensor is NOT c...

Page 26: ...ses by road map control because of the pressure caused by the decreased fan speed of rotation To activate this function it is necessary to set it to each outdoor unit When the setting is external input to PCB necessary this function works by short circuiting SILENT pins When the setting is external input to PCB unnecessary this function always works When the setting is silent priority max fan mode...

Page 27: ...creased up to 20 deg when required level of indoor unit is small When the refrigerant amount in the system is adjusted it is necessary to select test run that the required level becomes 31 2 MOV pulse changes to 55 for 1 minute when valve pulse continues to be 55 or more for 10 minutes The purpose is to decrease the flow volume of the refrigerant so that room temperature can be detected with less ...

Page 28: ...it state ON OFF is displayed on D in DSBE column when the Checker software is used 0 OFF 1 ON In case of special controls RAP valve kit performs special operation For details refer to Special Controls section 6 3 Indoor Fan Speed Control CCU intervenes in fan control of the indoor unit according to the state at the operating mode below The priority order of fan control by CCU is higher than that o...

Page 29: ...unit under this control Setting No 0 Invalid All units Mode Operation Stop Thermostat ON OFF doesn t concern 1 DP operates for 20 minutes and stops for 2 hours 2 DP operates for 20 minutes and stops for 20 minutes 3 DP always operates 4 DP operates for XX minutes when indoor unit s operation changes from thermostat ON thermostat OFF or operation stopped Cooling mode Dry mode Heating mode 5 DP oper...

Page 30: ...EEPROM setting in main outdoor unit CODE E1 In heating operation this function virtually does not work because preset discharge air temperature is 50 and this is sufficiently higher than actual discharge temperature For preset discharge air temperature that is set in the indoor unit is able to change refer to manual for indoor unit 7 1 Oil Level Oil level Meaning Conditions of oil Judgement 2 Suff...

Page 31: ... level becomes 0 The supply of oil is received from 1 unit at a time in sequence according to the order of priority of their inverter compressors Operation during unit refrigerant oil recovery 1 Oil receiving outdoor unit ORVR turns ON and remains ON 2 Oil supply outdoor unit BPV turns ON and remains ON BPV bypass valve repeatedly turns ON and OFF according to a constant cycle This oil recovery mi...

Page 32: ... maximum horsepower Indoor units MOV at all indoor units operate at a fixed pulse according to the indoor unit capacity RAP valve kits at all indoor units operate in Cooling mode OFF status MOV RAP valve kit Fan Fan operates at the set fan speed or stops depending on the operation mode of the indoor unit Heating cycle Control time Maximum 2 minutes Stops once before and once after control Outdoor ...

Page 33: ...table below Type K1 K2 and D1 operates differently according to the setting EEPROM setting in main outdoor unit CODE 24 Setting No 0 Setting No 1 Type of indoor unit Mode of indoor unit Thermostat ON OFF Pulse of MOV Fan speed Flap Fan speed Flap Stop 100 180 Stop LL Open Open Fan only 100 180 LL Stop LL LL Cooling OFF 115 185 Set speed Set speed Stop LL Set speed Set speed ON Present pulse 20 L L...

Page 34: ...djustment control for non stop operation 3 Normal operation When the above operation is finished normal operation starts at the horsepower determined by the indoor units where thermostats are ON 2 minutes All outdoor units operate at maximum horsepower Valves at all indoor units operate at a fixed pulse according to the indoor unit capacity Fan operates at the set fan speed depending on the indoor...

Page 35: ...s of operation after defrost was once completed If all indoor units are stopped while defrosting or if the outdoor unit is stopped due to protection control or another reason then defrost control will not start for a minimum of 5 minutes after restart occurs 9 1 Defrost Methods 9 2 Constraint Conditions To 10 C 10 To 5 C 5 C To 9 3 Frost Detection 1 Frost detection does not occur for 5 minutes aft...

Page 36: ...tes Until all outdoor units heat exchanger temperature 15 C 9 5 Outdoor Unit Cycle Defrost Outdoor unit cycle defrost is performed in systems where 2 or more outdoor units are connected to the refrigerant system With this defrost method when 1 outdoor unit operates in defrost mode heat exchanger operating as a condenser another outdoor unit operates as an evaporator in the same way as in ordinary ...

Page 37: ...me 2 4 way valve adjustment control 3 Normal operation Outdoor Unit cycle defrost process Outdoor unit cycle defrost is always completed in 2 defrost operations 1 When there are 2 outdoor units 2 When there are 3 outdoor units Defrost outdoor unit Evaporator outdoor unit Defrost outdoor unit Evaporator outdoor unit Second operation First operation Switch Defrost outdoor unit Evaporator outdoor uni...

Page 38: ...ode Stop Heat exchanger Compressor Fan Heat exchanger Compressor Fan Heating E or S E E E C C C E E or S ON ON ON OFF OFF OFF ON ON OFF OFF OFF ON OFF ON ON or S OFF OFF OFF ON OFF ON or S ON or S ON ON OFF OFF OFF ON or S Fan S S C C S S S C C S S S C C S S S C C S S S C C S S S C C S S S C C S Thermostat ON OFF 3 OFF Indoor unit expansion valve fan 3 Only for High Static Pressure Ducted Type Ind...

Page 39: ...the upper current limitation mode Serial parallel I O must be connected in order to perform demand control The below input is received by serial parallel I O and demand control is performed The demand values can be set as needed with serial parallel I O It is able to display the present condition on the remote controller The rated current indicates the current value that is listed in the catalog o...

Page 40: ...tem The current limitation values can be set by changing either contact The rated current indicates the current value that is listed in the catalog or service manual During setting in DRM1 DRM3 demand activated displays on the remote controller of the indoor unit In respect of connection method for demand terminal block and Seri Para I O unit refer to the installation instructions supplied with th...

Page 41: ...system has been stopped for 60 minutes In this case possible causes include sensor failure and compressor overheating caused by insufficient refrigerant The alarm also occurs if the sensor temperature is at or above the abnormal temperature 100 C when 30 minutes have passed after the compressor stopped In this case it is possible that the discharge temperature from a different compressor unit is b...

Page 42: ...ted 11 2 Current Protection hp horsepower 14 hp 16 hp 18 hp 20 hp Overload current Outdoor unit Lock current List of over current and lock currents Over current Lock current Alarm display Compressor 2 Compressor 3 H11 H21 H12 H22 Detected current List of Alarms hp horsepower Description Alarm Occurs when an open CT circuit is detected in the inverter compressor Occurs when a current value of over ...

Page 43: ...ons and a broken wiring short circuit or poor connection to the PCB in the high pressure sensor circuit for 30 seconds or leaves the valve close When the low pressure sensor becomes an electrical open circuit or a short circuit conditions and a broken wiring short circuit or poor connection to the PCB in the low pressure sensor circuit for 30 seconds When all outdoor units stop in cooling mode and...

Page 44: ...temperature F14 SCG Gas temperature in SC circuit F23 EXG2 Gas temperature sensor in heat exchanger 2 F24 EXL2 Liquid temperature sensor in heat exchanger 2 H08 OIL1 Oil temperature sensor 1 Inverter compressor H27 OIL2 Oil temperature sensor 2 Constant speed compressor 1 H28 OIL3 Oil temperature sensor 3 Constant speed compressor 2 F12 SCT Suction temperature 11 7 Magnet switch failure The consta...

Page 45: ... stops but the other outdoor units in the system operate normally 12 1 Automatic Backup Operation 12 1 1 Alarms That Result in Automatic Backup Operation Alarm list 1 Backup operation continues unless power supply of all outdoor units is turned off Over current of compressor 1 Compressor 1 CT sensor disconnected or short circuit Over current of compressor 2 Lock current of compressor 2 HIC trouble...

Page 46: ... sensor in heat exchanger 2 Liquid temperature sensor in heat exchanger 2 Compressor 1 discharge temperature sensor disconnected Oil temperature sensor 1 Inverter compressor Compressor 2 CT sensor disconnected or short circuit Compressor 3 CT sensor disconnected or short circuit Compressor 2 discharge temperature sensor disconnected Compressor 3 discharge temperature sensor disconnected Oil temper...

Page 47: ...of failed outdoor units 2 At the SW7 switch on the PCB of the failed outdoor unit turn ON the switches for all compressor to dis able and turn ON the backup switch Outdoor unit hp 8 hp 10 hp 12 hp 14 hp 16 hp 18 hp 20 hp Switches to turn ON INV BU INV AC1 BU INV AC1 AC2 BU 3 Close all service valves at the failed outdoor units 4 Reset the power at outdoor unit No 1 The outdoor unit that backed up ...

Page 48: ...utdoor units installed on the main outdoor PCB is changed to 2 from 3 All compressors of main outdoor unit are backed up Unit No 1 Main unit CCU function Unit No 2 Sub unit Unit No 3 Sub unit Main outdoor unit Sub outdoor unit Sub outdoor unit Number of setting 2 Not necessary Not necessary Unit No 1 2 3 All compressors in unit No 1 are backed up Therefore the setting No of outdoor units installed...

Page 49: ...even if it is not possible to communicate with the stopped indoor units EEPROM setting in main outdoor unit CODE 23 ON ON ON ON ON OFF OFF OFF OFF OFF ON ON ON ON ON OFF OFF OFF OFF OFF ON ON ON ON ON OFF OFF OFF OFF OFF Operation continue Stopped units does not count Normal operation Error occurs Indoor unit failure 4 Setting No 3 Operation continue Indoor unit failure 3 Setting No 3 Examples In ...

Page 50: ...l judgment mode 13 3 2 Conditions for amount of refrigerant judgment After judgment mode starts judgment occurs when all outdoor units in the system have been operating continuously for 30 minutes or longer Amount of refrigerant judgment requires that all outdoor units operate continuously for 30 minutes or longer This is in order to prevent incorrect adjustment of amount of refrigerant based on f...

Page 51: ...of insufficient gas Cooling operation There is an indoor unit where the position of the electronic control valve is much higher open by 300 pulses or more than it was at start and the difference E3 E1 at that indoor unit is large 15 C or more Heating operation There is an outdoor unit where the position of the electronic control valve is much higher open by 300 pulses or more than it was at start ...

Page 52: ... Measures against smell For detail refer to 13 1 For detail refer to 10 1 23 E06 ignore function 1E Demand remote controller display 0 No demand display 1 When demand ON ready to start display P 2 When forced thermostat OFF with demand ON ready to start display Never use the DN code unlisted in the following table P Factory preset mode 2A Dew condensation prevention control of indoor unit 0 Invali...

Page 53: ... refer to 9 2 41 90 Never use 1 Valid A6 Measures against smell when indoor unit cooling thermostat OFF 0 Invalid P 1 Valid A7 Validity invalidity of capacity control when cooling operation 0 Invalid P 1 Valid AC Actuation of solenoid valve kit EP closed 0 Invalid P C1 O2 output change 0 Continuously set OFF P 1 Refrigerant leak prevention normal OFF 2 Refrigerant leak prevention normal ON For det...

Page 54: ... MEMO 1 46 ...

Page 55: ...l 2 5 4 Indoor Unit MOV Control 2 6 5 Drain Pump Control 2 6 6 Automatic Heating Cooling Control 2 7 7 Discharge Air Temperature Control 2 8 8 RAP Valve Kit Control 2 8 9 Automatic Flap Control 2 9 10 Filter Sign 2 9 11 Electric Heater Control 2 10 12 Fan Control during Dry Mode 2 10 13 Ventilation Fan Output 2 11 14 T10 Terminal 2 11 15 Parameter 2 12 Contents ...

Page 56: ...y sensor is enabled lower temperature near the floor must be considered To correct this difference in temperature the correction temperature is used The factory setting for the correction temperature is different depending on the model Refer to 15 Parameter Example Cooling temperature correction 4 Way cassette correction temperature 0 degrees Body sensor is enabled Set temp in remote controller 28...

Page 57: ...5 25 0 Detected temp by remote controller sensor 17 0 20 5 21 0 Room temp temp detected by remote controller sensor 17 0 17 0 20 5 20 5 21 0 21 0 T 3 0deg 0 5deg 1 0deg Thermostat ON Thermostat OFF Thermostat OFF The thermostat does not turn OFF for 3 minutes after it turns ON The thermostat does not turn ON for 1 to 3 minutes after it turns OFF The thermostat does not turn OFF for 60 minutes duri...

Page 58: ...n started The fan speed may sometimes increase when this condition continues for 6 minutes The fan mode increases when the heat exchanger liquid temperature E1 or discharge air temperature increases The fan mode is selected based on the discharge air temperature and E1 temperature as shown in the figure below If the E1 temperature and discharge air temperature are different the higher temperature ...

Page 59: ...ntrolled as shown below during the automatic fan mode The fan mode does not change for 3 minutes during cooling operation and 1 minute during heating operation once it is changed The values in the parenthesis are when the remote controller sensor is enabled 3 2 1 deg Indoor fan mode HH H L HH H Cooling deg Indoor fan mode HH H L HH H ...

Page 60: ...oat switch worked The drain pump may often operate for a while when the cooling thermostat turns OFF or the indoor unit is stopped The drain pump can be turned on when the cooling thermostat is OFF if the setting is made to prevent water collected in the drain pan for a long time For details refer to 5 2 Detailed Settings Function The indoor unit heat exchanger liquid temperature E1 is less than 0...

Page 61: ... Control temperature for cooling 0 5 degree Cooling Heating Room temperature Control temperature for heating 1 0 degree When setting temperature in remote controller is 20 C in the cooling mode Heating Heating thermostat OFF Cooling Cooling thermostat OFF Heating continues for 10 minutes regardless of temp condition Then the mode changes to cooling The heating thermostat OFF continues for 10 minut...

Page 62: ... for 7 minutes in cooling mode Temperature more than Discharge air temperature setting 3 5 C is continuously detected for 7 minutes in heating mode There is no priority order between the room temperature control and discharge air temperature control Relation between thermostat ON OFF and room temperature control discharge air temperature control Thermostat turns OFF Either room temperature control...

Page 63: ...F5 Models other than the above The flap closes once and moves to the set position when the operating mode is changed If the flap position cannot be adjusted because of a problem only the swing operation can be used Check the flap and flap motor The swing operation can be set for the flap 10 Filter Sign When accumulated operating time of the indoor unit reaches the set time the filter sign appears ...

Page 64: ...or enabled ON when T 2 0 C OFF when T 1 0 degree ON body sensor temperature 26 C OFF body sensor temperature 29 C ON discharge air temperature 40 C OFF discharge air temperature 45 C ON ON OFF Electric heater 29 26 Body sensor C 45 40 Discharge air C 1 4 2 deg For details on T refer to 1 Room Temperature Control 12 Fan Control during Dry Mode The fan control during dry mode is as follows A A B Fan...

Page 65: ... the output of the ventilation turns OFF The ventilation fan can also be turned ON and OFF using the ventilation button on the remote controller Refer to the operating instractions supplied with the remote controller To enable this function set the indoor EEPROM DN31 to 0001 in advance 14 T10 Terminal Using the T10 terminal each indoor unit can be operated or stopped separately Also operating cond...

Page 66: ...ting at time of factory shipment U1 4 Way Cassette 4 deg 2 deg Y1 Y2 4 Way Cassette 60 60 4 deg 2 deg L1 2 Way Cassette 4 deg 2 deg D1 1 Way Cassette 4 deg 2 deg F1 F2 Low Silhouette Ducted 4 deg 2 deg M1 Slim Low Static Ducted 4 deg 2 deg E1 High Static Pressure Ducted 4 deg 2 deg T1 Ceiling 4 deg 2 deg K1 K2 Wall Mounted 2 deg 2 deg P1 Floor Standing 0 deg 2 deg R1 Concealed Floor Standing 0 deg...

Page 67: ...S 1 Removing Panels 3 2 2 Discharging Compressor Oil 3 3 3 Backup Operation 3 6 4 Recovering Refrigerant 3 8 5 Checking for Leakage After Repair 3 15 6 Evacuating System 3 17 7 Charging Compressor Oil 3 19 8 Pumping Out Refrigerant from Outdoor Unit 3 24 9 Compressor 3 27 Contents ...

Page 68: ...wer is turned off wait for 5 minutes without any work Then start working CAUTION Power outlet panel Tubing cover Front panel Front panel Type 8HP 10HP 12HP Fig 1 a Front panel Power outlet panel Tubing cover Front panel Type 14HP 16HP Fig 1 b Left front panel Right front panel Upper left front panel Lower right front panel Power outlet panel Tubing cover Type 18HP 20HP Fig 1 c ...

Page 69: ...or unit Install hoses as indicated on the equipment and feed nitrogen gas gradually to provide pressure to the system from the low pressure outlet and collect oil in a pan or container Fig 2 The low pressure outlet port is at the Hi side of the left side A faulty outdoor unit may remain pressurized The oil outlet port employs a Schrader type push to release valve Be careful to avoid accidental oil...

Page 70: ...2HP Nitrogen gas Manifold gauge Lo Hi Packless valve or the like Container Oil balance tube service port For 7 94mm dia connector High pressure outlet port for ø7 94mm dia connector Low pressure outlet port for ø7 94mm dia connector Liquid tube service port for ø7 94mm dia connector Gas tube service port for ø7 94mm dia connector Type 14HP 16HP Nitrogen gas Manifold gauge Lo Hi Packless valve or t...

Page 71: ...s strong as below over 0 06 over 4 0 Changing the oil and system cleaning with dry cores are necessary Motor burnout Brownish blackish Pungent burnt odor Changing the oil and system cleaning with dry cores are necessary It is difficult to measure the total acid value in the field therefore oil hue and odor are the rule of thumb Checking for carbon deposits and abrasive metal powder can additionall...

Page 72: ...all the outdoor units If the power is not reset on the control PCB of the No 1 outdoor unit main unit backup operation will continue after the repairs are completed CAUTION Backup operation is intended as emergency operation until repairs are made Have repairs made as soon as possible 3 2 Manual Backup This backup operation is the conventional method of backup operation It involves disconnecting t...

Page 73: ...alve at the failed outdoor unit Collecting refrigerant in the failed outdoor unit Short circuit the vacuum application pin CN24 on the control PCB of the failed outdoor unit where the service valves are closed then turn the power ON Also disconnect the wiring between the outdoor units With the normal outdoor units operating monitor the operating condition and open close the liquid tube ser vice va...

Page 74: ...ry cylinder using hoses To avoid the entry of air into the refrigerant tubing carry out this connection work carefully Fig 3 For detailed procedures such as connecting the refrigerant recovery unit with the recovery cylinder and methods used for recovery follow the specific instructions that came with the refrigerant recovery unit CAUTION 5 Locate the AP Air Purge pins on the control PCB in the fa...

Page 75: ...P Refrigerant recovery cylinder Refrigerant recovery unit Manifold gauge Lo Hi Low pressure outlet port for ø7 94mm dia connector Fig 3 b Fig 3 c Low pressure outlet port for ø7 94mm dia connector Liquid tube service port for ø7 94mm dia connector Gas tube service port for ø7 94mm dia connector Type 18HP 20HP Refrigerant recovery cylinder Refrigerant recovery unit Manifold gauge Lo Hi High pressur...

Page 76: ...ant recovery procedures 1 When replacing or repairing a faulty unit let other normal indoor units run excluding indoor unit where refrigerant is recovered Modify power to permit turning off power to refrigerant recovered indoor units independently Power can independently be turned off for indoor unit where refrigerant is recovered Change controllable number of indoor units including changes in gro...

Page 77: ...y procedures 1 using indoor unit ball valve 1 If a ball valve with a service port has been provided in the indoor unit as shown in Fig 4 follow the instructions given in 2 through 6 below If the service port is instead located in the outdoor side follow the instructions in 4 2 3 Refrigerant recovery procedures 2 2 After running the unit in Cooling mode for about 5 minutes as described in 4 2 1 Coo...

Page 78: ...CN28 It is not necessary to recover the refrigerant from the balance tube Therefore do not operate the balance tube valve CAUTION 4 Turn off power to all equipment in the system Then pull out the RC1 connector 4P BLU CN75 on the out door control PCB in the outdoor unit for which pump down has been completed By pulling out the RC1 connector communication between the main and the sub outdoor units w...

Page 79: ...12HP Refrigerant recovery cylinder Lo Hi Manifold gauge Liquid tube service port for ø7 94mm dia connector Refrigerant recovery unit Fig 5 a High pressure outlet port for ø7 94mm dia connector Low pressure outlet port for ø7 94mm dia connector Gas tube service port for ø7 94mm dia connector Type 14HP 16HP Refrigerant recovery cylinder Refrigerant recovery unit Lo Hi Manifold gauge Liquid tube serv...

Page 80: ...it Fig 5 5 Connect the manifold gauge valves refrigerant recovery unit and refrigerant recovery cylinder Quickly connect each part to prevent air from entering the tubing 6 Check that each service valve of the gas tubes liquid tube and the balance tube for the outdoor unit has opened then perform refrigerant recovery If only a single outdoor unit is installed the balance tube is not used Therefore...

Page 81: ...y soapy water to the repaired part such as a newly brazed part and briefly inspect 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 Again feed nitrogen gas to obtain a system pressure of 3 8 MPa Then measure both the outdoor ambient temperature and the pres...

Page 82: ...ia connector Low pressure outlet port for ø7 94mm dia connector Gas tube service port for ø7 94mm dia connector Type 14HP 16HP Nitrogen gas Lo Hi Manifold gauge Liquid tube service port for ø7 94mm dia connector Fig 6 b Fig 6 c High pressure outlet port for ø7 94mm dia connector Low pressure outlet port for ø7 94mm dia connector Liquid tube service port for ø7 94mm dia connector Gas tube service p...

Page 83: ... the outdoor control PCB By short circuiting the AP pins and turning on power to the outdoor unit all elec tronic valves in the outdoor unit are forcibly opened and any remaining nitrogen gas can be recovered Failure to perform this procedure may result in nitrogen gas remaining in the refrigerant circuit and causing operating problems Therefore never skip this step CAUTION 5 Turn the power ON at ...

Page 84: ...nector Low pressure outlet port for ø7 94mm dia connector Gas tube service port for ø7 94mm dia connector Type 14HP 16HP Lo Hi Manifold gauge Liquid tube service port for ø7 94mm dia connector Vacuum pump Fig 7 b Vacuum pump High pressure outlet port for ø7 94mm dia connector Low pressure outlet port for ø7 94mm dia connector Liquid tube service port for ø7 94mm dia connector Gas tube service port...

Page 85: ...ers the charging tank CAUTION 1 Evacuation drying in oil charging tank With the lower side valve fully closed open the upper side valve and connect it to the vacuum pump via the manifold gauge valves as shown below Run the vacuum pump and evacuate the tank until the pressure falls to below 101kPa 755mmHg 5 Torr for the evacuation drying After the evacuation drying is finished fully close the upper...

Page 86: ...ce port low pressure side CAUTION 3 Charging compressor oil into outdoor unit Connect the lower valve to the low pressure outlet with Schrader type push to release valve in the outdoor unit to be oil charged and then connect the high pressure outlet with push to release valve to the upper valve via the manifold gauge valves at Hi pressure gauge side In addition connect the gas tube service port wi...

Page 87: ...ector Gas tube service port for ø7 94mm dia connector Type 14HP 16HP DPR Upper valve Lower valve Close Close Manifold gauge Lo Hi Fig 11 b Fig 11 c High pressure outlet port for ø7 94mm dia connector Low pressure outlet port for ø7 94mm dia connector Liquid tube service port Gas tube service port for ø7 94mm dia connector Type 18HP 20HP Lower valve Manifold gauge Lo Hi for ø7 94mm dia connector DP...

Page 88: ... connecting hoses Perform these procedures quickly and securely so that no air 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 follow the instructions that came with the refrigerant recovery unit 7 2 If Outdoor Unit Has Not Been Charged with Refriger...

Page 89: ...s not necessary to discharge the extra oil from the system For the method used for additional oil charging after compressor replacement refer to 7 1 If Refrigerant Has Already Been Charged to Outdoor Unit The oil absorbs moisture readily This work must be completed quickly CAUTION High pressure outlet port for ø7 94mm dia connector Low pressure outlet port for ø7 94mm dia connector Oil balance tub...

Page 90: ...as installing a high pressure cutout in the circuit 3 Connect the outdoor unit maintenance remote controller to the RC connector CN73 3P BLU on the out door 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 or longer 4 Use the outdoor unit maintenance remote controller to check the operating status of the indoor uni...

Page 91: ...y during the backup operation by recovering the refrigerant from the outdoor unit to be repaired Measure the weight of the refrigerant and cylinder itself beforehand and provide sufficient 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 out door unit Check that the manifold gauge valves are fully...

Page 92: ...from the outdoor unit control PCB of that outdoor unit Then immediately fully close the gas tube valve on that outdoor unit Pulling out the SCT connector immediately stops all of the outdoor units 10 Connect the high pressure gauge side 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...

Page 93: ... by generally accepted requirements is 1 M JUDGMENT START Is there burning of the failed compressor motor Follow the instructions in 2 Discharging Compressor Oil and drain the oil from all compressors in the same system Then inspect Is the color phase 4 0 or above or is a sharp odor present Go to 9 2 1 Replacing only the failed compressor Follow the instructions in 2 Discharging Compressor Oil and...

Page 94: ...when charging with 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 repaired outdoor unit then remove the short circuit at the AP pin CN24 Finally fully open all valves on the gas tube liquid tube and balance tube However leave the balance tube fully c...

Page 95: ...rt circuit at the AP pin CN24 Finally fully open all valves on the gas tube liquid tube and balance tube However leave the balance tube fully closed if only a single outdoor unit is installed 7 If backup operation was engaged follow the instructions in 3 Backup Operation and perform backup opera tion recovery 8 If charging with an amount of new refrigerant equal to the amount of recovered refriger...

Page 96: ...nit then remove the short circuit at the AP pin CN24 Then fully open all valves on the gas tube liquid tube and balance tube However leave the balance tube fully closed if only a single outdoor unit is installed 8 If backup operation was engaged follow the instructions in 3 Backup Operation and perform backup opera tion recovery 9 If charging with an amount of new refrigerant equal to the amount o...

Page 97: ...ce port Schrader type valve of all outdoor units where dry cores will be attached then recover the refrigerant from the tubing Be sure that no air enters the tubing at this time 5 As shown in Fig 15 disconnect the tube that runs from the liquid tube valve to the ball valve on all outdoor units where dry cores will be attached Then attach the dry cores 6 At all outdoor units where dry cores are att...

Page 98: ...valve is not installed on the outdoor unit 1 Refer to 4 2 3 Refrigerant recovery procedures 2 Indoor unit with no ball valve equipped Perform pump down of the refrigerant from all indoor units and inter unit tubing to the outdoor unit side 2 Cut the liquid narrow tube at all outdoor units where dry cores will be attached then attach the dry cores and ball valves as shown in Fig 15 3 For the next s...

Page 99: ... service port of the gas side service valve 2 Remove the insulator that the compressor is surrounded 3 Remove the lid on the compressor terminal plate Then disconnect the power cablel and discharge sensor 5 Remove the bolts 3 locations on the foot of the compressor Then remove the washers and rubber spacers 6 Remove the welded parts 3 locations as shown in the figure 7 Pull the compressor toward y...

Page 100: ...isconnect the tube with flare nut for the constant speed compressor Tube with flare nut 8 Pull the compressor toward you 4 Remove the crankcase heater Protect the sensors and the surrounding plates rubber lead wires clamps and other items CAUTION NOTE If oil remaining in the compressor reaches the equalized oil level oil will come pouring out Cover the tube in place with waste cloth while watching...

Page 101: ...ut Cover the tube in place with waste cloth while watching out for oil leaks Then cap the disconnected tube and mount the flare nut on the compressor Tighten the flare nut with a seal bonnet 1 4 in it NOTE After the compressor is replaced install the double ring clamp with rubber in its original position When shipping the resin clamper is used After replacement of the compressor use the stainless ...

Page 102: ... MEMO 3 36 ...

Page 103: ... Remote Controller 4 4 OUTDOOR UNIT MAINTENANCE REMOTE CONTROLLER 1 Overview 4 2 2 Functions 4 3 3 Ordinary Display Controls and Functions 4 4 4 Monitoring Operations 4 9 5 Outdoor Unit Alarm History Monitor 4 11 6 Mode Settings 4 12 Contents ...

Page 104: ... indoor unit connection status number of units 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 checker wiring is required in order to connect the outdoor unit maintenance remote controller to the outdoor unit PCB Ordinary remote controllers or other...

Page 105: ...tails display No of indoor outdoor units Unit 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 outdoor unit compressors Oil level of the outdoor unit oil sensor Total outdoor unit power ON time Outdoor unit microcomputer version other information n Tempe...

Page 106: ...line in the inter unit control wiring is connected it can be left as is l 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 mode 1 and setting mode 2 can be used l The overall system status for that refrigerant system is displayed Special service checker wiring PCB connector 3P BL...

Page 107: ...o change between heating and cooling operation The display indicates the operating mode of the indoor unit with the lowest unit No l All units test run Fig 2 Operation The CHECK button can be used to start and stop a test run for all indoor units Press and hold for 4 seconds to turn ON During the test run TEST is displayed The status of test runs performed from the indoor unit remote controller is...

Page 108: ...ours Compressor 2 operating time 0 99999999 hours Compressor 3 operating time 0 99999999 hours Compressor 1 oil level 0 Empty 1 Insufficient 2 Sufficient Compressor 2 oil level 0 Empty 1 Insufficient 2 Sufficient Compressor 3 oil level 0 Empty 1 Insufficient 2 Sufficient Outdoor unit power ON time 0 99999999 hours Compressor 1 operation count 0 65535 times Compressor 2 operation count 0 65535 time...

Page 109: ...ddress which is currently selected XX Outdoor 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 À Á and Â are displayed as shown in Fig 3 01 No of connected indoor units 4 units connected Sample displays 02 Unit Nos 1 2 3 and 4 are connected Fig 3 Fig 4 Fig 5 ...

Page 110: ...efore 10 seconds have passed press the FLAP button n The total compressor operating time is displayed in 1 hour units using 8 digits When the first 4 digits are displayed the top dot of the colon is illuminated Figure A When the last 4 digits are displayed the colon dot is OFF Figure B The display of the first 4 digits and last 4 digits changes automatically after 10 seconds The display can also b...

Page 111: ...emperature monitoring is illuminates The display and operations are the same as for monitor mode using the indoor unit remote controller Á Press the button and select the indoor unit to monitor Â Press the temperature setting and buttons and select the item code of the temperature to monitor The unit No of the selected indoor unit and the temperature data are displayed Ã To end monitoring press th...

Page 112: ...gh pressure sensor temp Heat exchanger gas 1 EXG1 Heat exchanger liquid 1 EXL1 Heat exchanger gas 2 EXG2 Heat exchanger liquid 2 EXL2 Outdoor air temp TO A Inverter primary current 1 A A CT2 Outdoor unit STEP MOV pulse 1 MOV1 STEP MOV pulse 2 MOV2 Discharge temp 3 DISCH3 CT3 Actual operating frequency STEP MOV pulse 4 MOV4 Low pressure sensor temp Suction temp SCT Detected oil temp 1 OIL1 Detected...

Page 113: ... shows the outdoor unit address Á Press the button and select the outdoor unit for which to monitor the alarm history Â Press the temperature setting and buttons and select the item code for the alarm history The select outdoor unit address the item code and the alarm history alarm data are displayed The outdoor unit address is displayed as R C XX YY System XX Outdoor unit system address R C XX Ou...

Page 114: ...hen the first 3 digits are displayed the bottom dot of the colon is illuminated To exit the setting mode press the CHECK button 1 2 3 5 5 3 1 2 and are displayed alternately Example shows display of 000 001 Display of first 3 digits Display of last 3 digits Description Parameter DN Snowfall sensor usage 000 Sensor input not present Control is performed 001 Sensor input present Control is performed...

Page 115: ...it address System XX YY System XX System address YY Address at outdoor unit sub bus item code number DN value in the table below and the setting data 6 digits The setting data is displayed in 6 digits The display changes between the first 3 digits Fig A B and the last 3 digits Fig A B When the first 3 digits are displayed the bottom point of the colon is lit Ä To exit setting mode press the CHECK ...

Page 116: ... MEMO 4 14 ...

Page 117: ...2WAY SYSTEM Remote Controller Functions 5 1 5 5 REMOTE CONTROLLER FUNCTIONS 1 Simple Settings Function 5 2 2 Detailed Settings Function 5 8 3 Remote Controller Servicing Functions 5 21 Contents ...

Page 118: ...a are displayed blinking on the remote controller LCD display Fig 1 At this time the indoor unit fan or all indoor unit fans in the case of group control begins operating Â If group control is in effect press the button and select the address unit No of the indoor unit to set At this time the fan at the indoor unit begins operating If unit No is displayed the same setting will be made for all indo...

Page 119: ...Sensor info 6 Servicing check 8 Detailed settings Sel Page Confirm 20 30 THU Confirm 7 Simple settings Simple settings Unit no Code no Set data 01 3 1 0001 Sel Next 20 30 THU 3 Select the Code no by pressing the or button Change the Code no by pressing the or button 4 Select the Set data by pressing the or button Select one of the Set data by pressing the or button Then press the button 5 Select t...

Page 120: ...take temperature 1 C down 0002 Shifts intake temperature 2 C down 0003 Shifts intake temperature 3 C down 0004 Shifts intake temperature 4 C down 0005 Shifts intake temperature 5 C down 0006 Shifts intake temperature 6 C down Electric heater installation 0000 No heater 0001 Heater installed Humidifying when heater thermostat is OFF 0000 No setting at time of shipping 0001 Yes Change to remote cont...

Page 121: ... times for each model Model data Model Filter sign ON time Standard Long life Standard High fouling Standard High fouling 0001 4 Way cassette U1 4 Way cassette 60 60 Y1 Y2 2500 1250 0002 2 Way cassette L1 2500 1250 0003 1 Way cassette D1 2500 1250 0005 Low Silhouette Ducted F1 F2 Slim Low Static Ducted M1 0006 High Static Pressure Ducted E1 0007 Ceiling T1 1500 750 0008 Wall Mounted K1 K2 150 75 0...

Page 122: ...e from a specific remote controller When there 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 selecting the operating mode If 2 or more remote controllers are set as priority remote controllers an alarm will occur at the remote controllers and operation wi...

Page 123: ...he heating thermostat is OFF 06 Heating intake 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 central control system or similar system and when an optional electric heater is installed This is unrelated to control of the electric heater 08 Humidifying whe...

Page 124: ...ger Á unit No or in the case of group control item code and settings data are displayed blinking on the remote controller LCD display Fig 3 At this time the indoor unit fan or all indoor unit fans in the case of group control begins operating Â If group control is in effect press the button and select the address unit No of the indoor unit to set At this time the fan at the indoor unit begins oper...

Page 125: ...n 1 and stay Without separate setting Swing Move to position 2 and stay Move to position 3 and stay Move to position 4 and stay Move to position 5 and stay 2 3 4 5 Fig 4 NOTE Setting the Flap Separately When setting the CZ RTC2 1 The 4 air outlet flap can be adjusted separately during operation When not adjusted separately all flaps operate in the same manner Procedure Stop the system before perfo...

Page 126: ... Servicing check 8 Detailed settings Sel Page Confirm 20 30 THU 7 Simple settings Detailed settings Unit no Code no Set data 10 3 1 0001 Sel Next 20 30 THU 3 Select the Code no by pressing the or button Change the Code no by pressing the or button or keeping it pressed 4 Select the Set data by pressing the or button Select one of the Set data by pressing the or button Then press the button 5 Selec...

Page 127: ...ature 9 C up Cooling intake temperature shift 0010 Shifts intake temperature 10 C up 0000 Function disabled 0001 Stops automatically 5 minutes after operation starts 0002 Stops automatically 10 minutes after operation starts 0123 Stops automatically 615 minutes after operation starts 0124 Stops automatically 620 minutes after operation starts Automatic stop time after operation start Can be set in...

Page 128: ... range Cooling 0018 18 C Lower limit at shipment 0019 19 C Lower limit 0029 29 C 0030 30 C Upper limit at shipment Upper limit Heating 0016 16 C Lower limit at shipment 0017 17 C Lower limit 0029 29 C 0030 30 C Upper 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 lim...

Page 129: ...ture 25 C 0026 Control temperature 26 C Fan output switching 0000 Output linked with fan ON when indoor unit fan is operating 0001 Fan mode operation output Drain pump delayed start time 0000 No delayed start 0001 1 second delayed start Except Indoor unit Type U1 F2 T1 E1 1 minute delayed start Indoor unit Type U1 F2 T1 E1 0002 2 seconds delayed start 2 minutes delayed start 0058 58 seconds delaye...

Page 130: ...2 2 seconds 0058 58 seconds 0059 59 seconds 0060 Continuously 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 Setting the Flap Separately Only for 4 way Cassette type 0000 0001 0002 0003 0004 0005 0006 Setting the Flap Separately Only for 4 way Cassette type ...

Page 131: ...hermostat is used Increase this value when it is difficult to turn the thermostat ON 18 Automatic stop time after operation start The time at which an indoor unit is automatically stopped after operation starts can be set in increments of 5 minutes 1E Temperature shift for cooling heating change in auto heat cool mode Auto heat cool selects the operating mode automatically based on the difference ...

Page 132: ...e T10 terminal is used for OFF reminder or for 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 wired remote controller The ventilation fan can operate linked with the start and stop of the indoor unit or can be operated even when the indoor unit is st...

Page 133: ...ode Changes flap operation to draft reduction mode 46 DC flap swing mode Selects the swing operation mode for the flap 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 operating ON OFF control is performed during humidifier operation This setting th...

Page 134: ...tting No Remote controller setting data Contents optional parts name 0000 3 0003 0003 6 0006 0003 0003 Standard setting at time of shipping Air blocking material for 3 way air discharge Air blocking material when a discharge duct is connected Air blocking material for 2 way air discharge Table 1 Table of DC Fan Motor Tap Settings 4 Way Cassette type Setting No Remote controller setting data Purpos...

Page 135: ... 1 1 0001 Sel Next 20 30 THU 4 Select the Code no by pressing the or button Change the Code no to 5D by pressing the or button or keeping it pressed Detailed settings Unit no Code no Set data 1 0 0 0 1 1 Sel Next 20 30 THU 5D 5 Select the Set data by pressing the or button Select one of the Set data in Table for DC Fan Motor Tap Setting Table 1 Table 3 by pressing the or button Then press the butt...

Page 136: ...nect the jumper connector to the connector pin TP1 2P red on the indoor unit con trol PCB If the setting No is 3 then connect the jumper connector to the connector pin TP3 2P yellow on the indoor unit control PCB 1 Way Cassette type Procedure Be sure to turn OFF the main power source before performing the steps below Open the electrical component box cover then check the indoor unit control PCB Fi...

Page 137: ...isplay Alarm history display Press and hold the and buttons for 4 seconds or longer Simple settings Filter life time 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 controller the indoor unit where that remote controller is connected stops Detailed settings System address indoor unit addr...

Page 138: ... Operation with forced thermostat ON 4 Test run Press the button Sensor temperature display Temperature display from each sensor 5 Sensor info Servicing check display Alarm history display 6 Service check Simple settings Filter lifetime operating mode priority central control address and other settings 7 Simple settings Press the button Restart When settings are made from a remote controller the i...

Page 139: ...c screen appears on the LCD display 2 Press the or button to see each menu If you wish to see the next screen instantly press the or button Select 4 Test run on the LCD display and press the button Change the display from OFF to ON by pressing the or button Then press the button Maintenance func 1 Outdoor unit error data 2 Service contact 3 RC setting mode 4 Test run Sel Page Confirm Sel Page Conf...

Page 140: ...e sensor to monitor For the relationships between the sensor addresses and sensor types refer to the table of temperature sensors and addresses on the next page Ã If group control is in effect press the button to select the unit to monitor Press the temperature setting buttons to select the item code to change Ä Press the button to return to normal remote controller display 1 2 3 4 5 Display shows...

Page 141: ...essing the or button for changes Then press the button Display sensor information of the unit Refer the information by pressing the or button Fig 13 CZ RTC3 Maintenance func 1 Outdoor unit error data 2 Service contact 3 RC setting mode 4 Test run Sel Page Confirm 20 30 THU Maintenance func 5 Sensor info 6 Servicing check 8 Detailed settings Sel Page Confirm 20 30 THU 7 Simple settings Sensor info ...

Page 142: ... area and lower area of the room in heating mode It is the value of the code 06 in the indoor unit s EEPROM setting Cooling mode 0 Indoor unit MOV pulse MOV Outdoor unit sensors Unit No 1 Unit No 2 Unit No 3 Discharge temp 1 DISCH1 Discharge temp 2 DISCH2 Discharge temp 3 DISCH3 High pressure sensor temp Heat exchanger gas 1 EXG1 Heat exchanger liquid 1 EXL1 Heat exchanger gas 2 EXG2 Heat exchange...

Page 143: ... 2 Outdoor Unit Control Panel LED Display 6 4 3 Remote Controller Servicing Functions 6 5 4 2WAY Alarm Codes 6 8 5 Blinking Inspection Display 6 29 6 Inspection and Characteristics of Parts 6 31 7 Test Pin 6 33 8 Symptom Thermostat in OFF continues or cycles OFF ON too frequently 6 34 Contents 2WAY SYSTEM Trouble Diagnosis Contents ...

Page 144: ...t correspond to number set Improper setting Improper setting Improper setting Indoor unit Number of connected indoor units is less than the number set Number of connected indoor units is more than the number set No indoor unit is connected during auto address setting Main outdoor unit is detecting error signal from sub outdoor unit Duplicated outdoor unit address Improper wiring between main outdo...

Page 145: ...up control unalarmed state of indoor units are inoperative Indoor unit communication error of group control wiring P02 P04 P03 P05 P20 P18 P17 P29 P31 P22 P16 Operating and timer lamps blinking alternately Timer and heat ready lamp blinking alternately Operating and heat ready lamp blinking alternately 1 Contents of Remote Controller Switch Alarm Display 2WAY SYSTEM Trouble Diagnosis alarm indicat...

Page 146: ...ess setting was completed successfully After 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 occurring Both OFF Automatic address setting is in progress Blinking alternately At time of automatic address setting the number of indoor units did not match ...

Page 147: ...temperature See figure at right Á Â Press the temperature 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 temperature relationship table on next page Ã If group control is in effect press the button to change the unit you wish to monitor Ä Press the CHECK button t...

Page 148: ...sing the or button for changes Then press the button Display sensor information of the unit Refer the information by pressing the or button CZ RTC3 Maintenance func 1 Outdoor unit error data 2 Service contact 3 RC setting mode 4 Test run Sel Page Confirm 20 30 THU Maintenance func 5 Sensor info 6 Servicing check 8 Detailed settings Sel Page Confirm 20 30 THU 7 Simple settings Sensor info Unit no C...

Page 149: ...r is installed Sensor address Sensor type Sensor address Sensor type Indoor unit Remote controller temp Room temp controlled Discharge air temp BL Discharge air temp setting Indoor unit intake temp TA Indoor unit heat exchanger temp E1 E1 Indoor unit MOV pulse MOV Indoor unit heat exchanger temp E3 E3 Outdoor unit Unit No 1 Unit No 2 Unit No 3 Unit No 1 Unit No 2 Unit No 3 Discharge temp 1 DISCH1 ...

Page 150: ...ant gas outlet of dual tube SCG Low pressure sensor trouble Gas temperature sensor trouble at outdoor heat exchanger 2 EXG2 Liquid temperature sensor trouble at outdoor heat exchanger 2 EXL2 Outdoor unit non volatile memory EEPROM trouble 6 17 6 18 Compressor 1 current trouble 6 17 6 18 6 19 Constant speed compressor 2 overcurrent alarm Constant speed compressor 2 lock current alarm Compressor 1 C...

Page 151: ...e temperature trouble High pressure switch activated Reverse phase or missing phase detected Compressor 1 INV overcurrent alarm Compressor 2 discharge temperature trouble Compressor 3 discharge temperature trouble Fan motor trouble Inverter compressor missing phase or lock alarm Compressor thermal protector is activated trip only and no alarm 6 23 P14 6 26 O2 sensor differential alarm Only when op...

Page 152: ...it PCB Correction progress Then start automatic address setting again Example Notes E12 Automatic address setting start is prohibited Automatic address setting was started when automatic address setting was in progress at Automatic address setting is in progress at another outdoor unit This alarm is not displayed on the remote controller Therefore check the blinking on the outdoor Wait for automat...

Page 153: ...nected at the outdoor unit 3 The power is OFF at all indoor units in the system Check 2 Check whether serial connector 1 CN76 is disconnected at the outdoor unit 3 Check the power at the indoor units Correction Example Notes E20 No indoor units at automatic address setting When automatic address setting was performed no indoor units were recognized 1 The inter unit control wiring from the outdoor ...

Page 154: ...oor unit quantity setting Recovery from this alarm occurs automatically when the set outdoor unit quantity matches the number of outdoor units detected on the outdoor unit main sub control wiring E29 Alarm Alarm code Alarm meaning Alarm conditions Probable cause 1 After initial communications were completed the outdoor unit main sub control wiring was disconnected 2 After initial communications we...

Page 155: ...ring the discharge temperature at times fluctuates 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 connector is partially disconnected from the PCB An F04 alarm will not result if the connector is completely disconnected circuit is open If the cause is ...

Page 156: ...nuous detection of a high discharge temperature then the compressor may stop for no apparent reason The purpose of this alarm is to facilitate identification of the problem in this case F06 F23 Alarm Alarm code F06 F23 Alarm meaning Gas temperature sensor trouble at outdoor heat exchanger 1 Gas temperature sensor trouble at outdoor heat exchanger 2 Alarm conditions 1 A D step is 10 steps or less s...

Page 157: ...p is 10 steps or less short circuit 2 A D step is 1014 steps or more open circuit Probable cause 1 Sensor malfunction including connector 2 PCB malfunction Check 1 Measure the sensor resistance Check that the sensor is operating normally 2 Use a remote controller monitor or PC monitor to check the temperature that is recognized by the microcomputer Correction Example Notes F14 Alarm Alarm code F14...

Page 158: ... the outdoor unit cooling and indoor unit heating Sudden rise in pressure at start may sometimes occur 4 Check for clogging of the refrigerant circuit 6 Outdoor unit PCB failure 5 Check for refrigerant over charging A normal PCB is needed to determine whether the problem is a PCB failure or a pressure sensor malfunction If an abnormality was found at the check items for a high pressure sensor malf...

Page 159: ...voltage failure sudden voltage decrease 2 Operating under extremely high pressure status over loaded operation Check open closed status of the service valve of the outdoor unit 3 Check power source and voltage H01 Alarm Alarm code Alarm meaning Alarm conditions Probable cause Check Correction Example Notes H01 Compressor 1 Current trouble Compressor 1 INV primary current detected overcurrent highe...

Page 160: ... missing CT trouble or PCB continuity trouble occur However this may not be true in the case of a missing phase caused by magnet SW trouble Check There is the possibility of a magnet SW failure Therefore check the phase voltage at a location that is as close to the compressor as possible 4 Low power voltage Trouble In most cases this occurs when another constant speed compressor including compress...

Page 161: ... H13 H23 Alarm meaning H03 Compressor 1 CT sensor disconnected or short circuit H23 Compressor 3 CT sensor disconnected or short circuit Alarm conditions Compressor 1 Compressor 2 3 When the compressor 1 INV is stopped the primary current detected over 18A Current values at compressor 2 and 3 are less than 2 0 A when 2 seconds or more had passed after the compressors began operation and output Whe...

Page 162: ...nce value Use a tester and measure the resistance between sensor No 1 and No 3 Connect a gauge to the low pressure outlet and check for changes in the value displayed by the monitoring software and for large deviation of the gauge pressure Resistance of less than 95k Check the open closed status of the service valve 3 Check for clogging of the refrigerant circuit When clogging in the refrigerant c...

Page 163: ...mpressor 2 or compressor 3 Alarm conditions This alarm occurs when a connector connection pins 1 and 2 for compressor 1 pins 4 and 5 for compressor 2 and pins 7 and 8 for compressor 3 is open Probable cause Disconnected connector Check Check that the connector is securely connected Correction 1 Connect the connector 2 Correct the connection at connector pins 4 and 5 Example Notes ...

Page 164: ...r HIC and ground HIC If there is a short circuit there is an HIC malfunction Correction Example Notes If an HIC failure is found replace the PCB Turn OFF the power and check the continuity of HIC and HIC on the HIC PCB L04 Alarm Alarm code Alarm meaning Alarm conditions that unit 5 times or more within 3 minutes Probable cause Check Correction Example Notes L04 Outdoor system address duplication C...

Page 165: ... a R22 model unit was connected by mistake 1 Check the refrigerant type at the connected unit The outdoor unit maintenance remote controller is required in order to set the refrigerant type in the outdoor unit EEPROM L18 Alarm Alarm code Alarm meaning Alarm conditions Probable cause 2 The 4 way valve circuit is locked malfunctioning Check 2 If the connector is normal check the 4 way valve wiring a...

Page 166: ...unit After an outdoor unit stops there is the sound of refrigerant flowing into an outdoor unit that was stopped for a long time When an outdoor unit starts after being stopped for a long time the start is accompanied by much vibration Check Check Check the following points limited to the stopped outdoor units while the other outdoor units are operating Refrigerant leak on the expansion valves MOV...

Page 167: ...n are loose and whether the fan connector in the outdoor unit PCB is properly connected 7 During heating check whether the air filters in the indoor unit are clogged If clogged clean the filters 8 During heating check whether an air short blockage has occurred in the indoor unit The system operates normally unless the temperature around the indoor unit is excessively high 9 During heating check fo...

Page 168: ...0B set to 0001 the EXCT input was shorted P16 Alarm 2WAY SYSTEM Trouble Diagnosis 4 2WAY Alarm Codes Alarm code Alarm meaning Alarm conditions Probable cause Check Correction Example Notes P16 Compressor 1 INV overcurrent alarm This alarm occurs when current trouble or current detection trouble occur when trouble judgement current is detected in the secondary current When more than the current val...

Page 169: ...e is a short circuit there is an HIC malfunction Correction 1 If there is a fan HIC failure or circuit failure replace the PCB 2 If the fan motor is locked replace the fan motor Example Notes If the fan does not start the below corrections may be effective Turn OFF the power and check the continuity of and on the fan circuit PCB P20 Alarm Alarm code P20 Alarm meaning Alarm conditions Probable caus...

Page 170: ...erant pressure balance is uneven at start or when inverter compressor lock occurs there is a missing phase in the inverter compressor wiring or a DCCT failure occurs This can be judged to be starting trouble which is not caused by HIC Check Check the power wiring and connector wiring Correction DCCT failure replace PCB or compressor failure Example Notes Use a tester to measure the voltage between...

Page 171: ...rm P16 P22 P29 H03 Hx1 Hx2 or H31 has occurred check the alarm history then refer to the corresponding items Correction Follow the instructions in the corresponding items to correct the trouble Recovery After repairing the malfunctioning locations reset the power for the system all outdoor units Caution Automatic backup mode will not be canceled until the power is reset Notes Automatic backup mode...

Page 172: ...ts remain together The conditions of magnet SW operation are poor difficult to open Õ 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 current is within the allowable range However this kind of trouble can occur if excessive current flows and may prevent the SW from opening 2 CT circui...

Page 173: ...ely 46Ω If the results are 0Ω or replace the coil When the voltage is normal measure the resistance between each pair of pins on the electronic control valve connector The connector is normal if all results pin 5 pin 1 pin 5 pin 2 pin 5 pin 3 pin 5 pin 4 are approximately 46Ω If the results are 0Ω or replace the coil MOV2 Measure the voltage between plug pin 5 and pins 1 through 4 at the CN63 conn...

Page 174: ...0 0 587 0 580 1 695 1 716 1 667 4 Coil Resistance of Outdoor Unit Fan Motor 5 Coil Resistance of Compressor Motor 6 Characteristics of Thermistor Resistor kΩ Resistor kΩ Ambient air temperature thermistor TO Suction temperature thermistor SCT Temperature C Temperature C Refrigerant gas outlet of dual tube thermistor SCG Heat exchanger liquid temperature thermistor EXL Heat exchanger gas temperatur...

Page 175: ...e test pin CN22 black then turn the power back ON Output is performed in the sequence shown in the table below for 0 5 seconds each Operation Operation Output Relay RY12 4 way valve 20s Relay RY8 Save valve SAVE Output Relay RY2 6 7 8 9 Relay RY1 1 2 3 4 5 Relay RY4 Bypass valve BPV Relay RY6 Oil recovery valve ORVR Relay RY3 Crankcase 2 CH2 Crankcase 1 CH1 Crankcase 3 CH3 Relay RY11 Refrigerant b...

Page 176: ...ote controller to RC socket on outdoor unit main control PC board and check alarm messages See operational 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 check alarm messages Replace discharge temperature sensor 2 3 Yes No 2 3 Demand value always stays l...

Page 177: ...201502 ...

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Panasonic U-20ME1E81, Service Manual

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