Panasonic U-8ME1E8E Service Manual Download Page 19

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2WAY SYSTEM

Control Functions

Outdoor Unit

- 12

4. Output of PCB

4-3. Refrigerant control valve [RCV]

The main purpose of this valve is to adjust the flow of refrigerant (refrigerant volume) on the evaporator. When

the valve determines that there are signs of a low refrigerant volume, refrigerant is supplied from the receiver

tank to the system.

- This valve turns ON when the evaporator is refrigerant shortage.

The heat exchanger of indoor unit is evaporator in cooling operation.

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.

Evaporator

RBV

RCV

Refrigerant shortage in evaporator

Receiver tank holds refrigerant

Two-phase

flow

Evaporator

RBV

RCV

Sufficient refrigerant is supplied to evaporator

High pressure from RCV pushes the liquid refrigerant out of the receiver tank

Two-phase flow

SM830186-00̲2WAY ECO-i.indb 12

2010/12/24 10:09:50

Summary of Contents for U-8ME1E8E

Page 1: ...6ML1E5 S 73ML1E5 D1 1 Way Cassette S 28MD1E5 S 36MD1E5 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 56MT1E5 S 73MT1E5 S 106MT1E5 S 140MT1E5 K1 Wall Mounted S 22MK1E5 S 28MK1E5 S 36MK1E5 S 45MK1E5 S 56MK1E5 S 73MK1E5 S 106MK1E5 R1 Concealed Floor Standing...

Page 2: ...roper installation or maintenance service including failure to follow the instructions in this document SPECIAL PRECAUTIONS WARNING When Wiring ELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL INJURY OR DEATH ONLY A QUALIFIED EXPERIENCED ELECTRICIAN SHOULD ATTEMPT TO WIRE THIS SYSTEM Do not supply power to the unit until all wiring and tubing are completed or reconnected and checked Highly dangerous ele...

Page 3: ...ping work for an installation or re installation and while repairing refrigeration parts Handle liquid refrigerant carefully as it may cause frostbite When Servicing Turn the power OFF at the main power box mains before opening 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 th...

Page 4: ...urtailing 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 in a small room select a suitable model and installation procedure so that if the refrigerant accidentally leaks out its density does no...

Page 5: ...n 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 11 15 Parameter 2 12 Section 3 OUTDOOR UNIT REPAIR P...

Page 6: ...on 5 2 2 Detailed Settings Function 5 4 3 Remote Controller Servicing Functions 5 17 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 SYSTEM Alarm Codes 6 7 5 Blinking Inspection Display on the Remote Controller 6 28 6 Inspection of Parts 6 30 7 Test Pin 6 31 SM83...

Page 7: ...SM830186 00 2WAY ECO i indb g SM830186 00 2WAY ECO i indb g 2010 12 24 10 09 45 2010 12 24 10 09 45 ...

Page 8: ...or 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 32 12 Backup Operation 1 36 13 Other Functions 1 39 Detail setting in EEPROM of outdoor unit 1 42 SM830186 00 2WAY ECO i indb 1 SM830186 00 2WAY ECO i indb 1 2010 12 24 10 09 45 2010 12 24 10 09 45 ...

Page 9: ... 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 System address 1 System 1 30 Not necessary No of indoo...

Page 10: ...ust 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 3E Setting No Delay time 0 Delay start invalid factory preset mode 1 System add...

Page 11: ...rder 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 Compressors 2 priority order between Compressors 3 Priority ...

Page 12: ... compressors stop in order of priority The compressor with lower priority order stops when the load of air 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 the start timing of each compressor 3 3 1 Delay start of compressor ...

Page 13: ... 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 phases This level becomes 31 at the test run The tar...

Page 14: ...ystem doesn t stop in all states except alarm appearing The test run will finish automatically in about one hour Compressor capacity can increase 5 5 Te_tgt_max Compressor capacity cannot increase Compressor capacity decreases Max required level 15 0 5 0 2 0 deg 1 5 Te_tgt_min 5 0 2 0 15 0 12 0 30 10 0 7 0 B area C area A area Evaporation temperature area B area is able to shift by EEPROM setting ...

Page 15: ...th this control It also prevents abnormal high pressure Condensation temperature area at heating operation Compressor capacity can increase Compressor capacity holds Thermostat OFF Compressor capacity decreases Tc_tgt_max Tc_tgt_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...

Page 16: ... The compressor capacity is controlled according to the table below Discharge temperature that is used for this control is the highest temperature among all compressors 106 deg 104 deg 103 deg 101 deg Capacity goes down 2 0 HP Capacity goes down 1 0 HP Capacity goes down 0 5 HP Compressor capacity cannot increase Compressor capacity can increase Compressor capacity decreases 105 deg Stop If this t...

Page 17: ...Max current 2 L 3 7 3 Primary current protection of HIC board The fan motor current is included in primary current PCB is protected from the power consumption increase of fan motor when the heat exchanger is blocked by frost etc Inverter 6 HP Inverter 10 HP Limit current 1 18 0 23 0 Max current 1 H 15 0 20 0 Max current 1 L 14 5 19 5 Limit current 1 Max current 1 H Stop If this current is detected...

Page 18: ...tops the 4 way valve 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 5 seconds before the inverter compressor starts After the inverter compressor starts the valve is ON for ten seconds After that it turns OFF This valve turns ON for 30 seconds after the outdoor unit stops After that it...

Page 19: ... 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 Evaporator RBV RCV LP HP Refrigerant shortage in evapo...

Page 20: ...nser 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 of its own outdoor unit or balance tube to the com...

Page 21: ... 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 For right side heat exchanger 4 8 2 Power Initialization If no indoor units have started even once after the power supply to the outdoor unit the MOV for heat exchanger holds the pulse at 480 pulses 4 8 3 Operation ...

Page 22: ...suction temperature and low pressure sensor temperature is adjusted to 5 20 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 operation takes priority over SC control Liquid SC 0deg Liquid Larg...

Page 23: ...mode may be recalculated and may be again fixed for 30 seconds 5 5 Operation after Fixed Initial Fan Mode After the fixed initial fan mode the fan mode is increased or decreased according to the operating conditions 5 5 1 Cooling operation A Fan mode is increased when the detected high pressure sensor temperature is high and is decreased when the pressure sensor temperature is low The fan mode is ...

Page 24: ...ax 2 HP 7 Unnecessary 3dB Max 1 HP 8 5dB Max 2 HP 9 Controlled in moderation Necessary 3dB Max 1 HP 10 5dB Max 2 HP 11 Unnecessary 3dB Max 1 HP 12 5dB Max 2 HP 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 Capacity is given priority this fun...

Page 25: ...iring The snow detection sensor can be connected with any outdoor unit regardless of the main or sub and it can control all outdoor units in communication wiring To activate this function it is necessary to set it to all EEPROMs on outdoor PCBs CODE 04 Setting No Operation 0 Snow detection sensor is NOT connected with this unit But this function is performed according to the signal of the sensor c...

Page 26: ... 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 influence of heat from the refrigerant 3 SC contro...

Page 27: ...tion OFF OFF ON OFF Heating Heating Stop OFF Operation OFF OFF ON ON RAP valve kit 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 detail 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 oper...

Page 28: ...drain pan for a long term Therefore the drain pump works longer to drain water surely To activate this function it is necessary to set it to EEPROM on the main outdoor PCB EEPROM setting of drain pump in main outdoor unit CODE 0C Setting No Indoor unit under this control 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 D...

Page 29: ...ting 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 Sufficient The compressor contains sufficient oil Ther...

Page 30: ...vel 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 RPV turns ON and remains ON RPV bypass valve repeatedly turns ON and OFF according to a constant cycle This oil recovery might...

Page 31: ... control Outdoor units All outdoor units operate at maximum horsepower Indoor units MOV MOV at all indoor units operate at a fixed pulse according to the indoor unit capacity RAP valve kit RAP valve kits at all indoor units operate in Cooling mode OFF status 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 minute...

Page 32: ...erates 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 K1 Stop 100 180 Stop LL Close Fan only 100 180 LL LL Close Cooling OFF 115 185 Set speed Set speed ON Present pulse 20 Set speed Set speed Excluding K1 E1 Stop 100 180 Stop Stop Fan onl...

Page 33: ...ts operate at a fixed pulse according to the indoor unit capacity RAP valve kit RAP valve kits at all indoor units operate in Cooling mode OFF status Fan Fan operates at the set fan speed or stops depending on the indoor unit operation mode When the above operation is finished normal operation starts at the horsepower determined by the indoor units where thermostats are ON Heating operation Contro...

Page 34: ...er reason then defrost control will not start for a minimum of 10 minutes after restart occurs 9 3 Frost detection A Frost detection does not occur for 5 minutes after operation starts B Frost is detected when either condition 1 or 2 below is met Condition 1 L2 line or below is detected twice each time continuously for 4 minutes when the compressor is operating Condition 2 L1 line or below is dete...

Page 35: ...rost end judgment conditions is met Condition 1 The temperatures are 10 C or higher at all liquid temperatures sensors installed on the outdoor unit heat exchanger If there is any other outdoor unit where the defrost end condition has not been met defrostcontrol continues for all outdoor units and system defrost control is not ended Condition 2 The maximum defrost time listed in the table below ha...

Page 36: ... is possible to stop by setting For the maximum defrost time refer to the table in Sec 9 5 EEPROM setting in main outdoor unit CODE F0 Time before defrosting 1 F1 Time before defrosting 2 F2 Time after defrosting 1 F3 Time after defrosting 2 9 6 Reverse Cycle Defrost If there is 1 outdoor unit a reverse cycle defrost will be carried out Defrost flow E Evaporator operation C Condenser operation E C...

Page 37: ... operate in defrost mode heat exchanger operating as a condenser outdoor units in the second defronting group operates as an evaporator in the same way as in ordinary heating mode In this way outdoor units in the second defronting group supply heat to the unit where defrost is occurring When outdoor units in the first defrosting group completes defrost the other outdoor unit performs defrost in th...

Page 38: ...for the rated current Operates to XX of the upper limit for the rated current Always in stop condition Input present Input not present The rated current indicates the current value that is listed in the catalog or similar material XX is able to set in EEPROM of main outdoor unit EEPROM setting in main outdoor unit CODE 1A 1B Demand setting Control Demand meaning Contact 1 Contact 2 No limit Operat...

Page 39: ...rature 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 being detected due to an error in the installation of the discharge thermistor Discharge sensor failure list Compressor No Compressor 1 Compressor 2 Compressor 3 Type Inverter Constant speed Cons...

Page 40: ...5A or less is detected when the constant speed compressor is operating If the inverter compressor operating frequency is low the current value is also low Therefore this alarm is detected only when the compressor is stopped The operating current of the constant speed compressors is always higher than 1 5 A Therefore this alarm occurs as the result of an open circuit or failure 11 3 Pressure Sensor...

Page 41: ...ontinues 60 minutes alarm occurs When an outdoor unit stops in heating mode regardless of system operation and low pressure sensor detects 0 16MPa or lower and this condition continues 60 minutes an alarm occurs If the following condition occurs after the system starts for XX times alarm occurs The low pressure sensor detects 0 05MPa or lower and this condition continues 2 minutes The low pressure...

Page 42: ...mperature 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 11 7 Magnet switch failure The constant speed compressor cannot stop when the contacts of the magnet swit...

Page 43: ... sure to check whether or not automatic backup mode has been canceled Alarm list 2 Backup operation continues as long as the problem doesn t solve Alarm display Compressor outdoor unit operation F04 Discharge sensor failure for compressor 1 A F05 Discharge sensor failure for compressor 2 A F06 Gas temperature sensor in heat exchanger 1 B F07 Liquid temperature sensor in heat exchanger 1 B F08 Ambi...

Page 44: ... 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 BU INV AC1 AC2 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 all compressors is not controlled by CCU main outdoor unit Even if all compressors of the main outdoor unit...

Page 45: ...hanged 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 bucked up Therefore the setting No of outdoor units installed on the main outdoor PCB is changed to 2 from 3 Sam...

Page 46: ...er of indoor units is decimal number round up 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 OFF OFF OFF OFF OFF OFF OFF OFF OFF OF...

Page 47: ... Judgment of Insufficient Refrigerant Gas and Overcharge This system includes a simple function for judging the amount of refrigerant 13 3 1 Starting refrigerant level judgment mode Short circuit the CHK pin on the No 1 outdoor for 4 seconds or longer to engage this mode The LED on the outdoor unit PCB begins blinking 13 3 2 Conditions for amount of refrigerant judgment After judgment mode starts ...

Page 48: ...r Insufficient Gas 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 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 differenc...

Page 49: ...100 P 125 130 For detail refer to 10 1B Upper current limitation setting for contact 2 1 130 0 Always stop 40 45 50 70 P 125 130 For detail refer to 10 1C Factory use 20 Factory use 21 Factory use 22 Factory use 23 E06 ignore function 1 P Invalid 0 1 63 24 Dew condensation prevention 0 P Invalid 1 valid For detail refer to 7 6 25 SH target shift value of K type indoor unit 0 P 1 2 3 4 5 27 Auto ch...

Page 50: ...mperature adjustment Lower temperature of B area Te_L 9 8 0 P 8 9 For detail refer to 3 6 1 40 Evaporation temperature adjustment Upper temperature of B area Te_U 9 8 0 P 8 9 For detail refer to 3 6 1 41 Regular intervals of system oil recovery control Long operation time in the part load 30 40 150 P 290 300 For detail refer to 7 5 43 Oil recovery control processing time 0 30 60 P 90 570 600 For d...

Page 51: ...pulse shift under SH control for indoor unit capacity 5 6kW or less 30 29 28 49 50 For detail refer to 6 1 3 AA Indoor min MOV pulse shift under SH control for indoor unit capacity 7 3kW 30 29 28 49 50 For detail refer to 6 1 3 AB Indoor min MOV pulse shift under SH control for indoor unit capacity over 10 6kW 30 29 28 49 50 For detail refer to 6 1 3 AD Max time of defrosting control 5 6 7 12 P 30...

Page 52: ...ime before defrosting 1 1 P 0 30 60 570 600 For detail refer to 9 6 F1 Time before defrosting 2 1 P 0 30 60 570 600 For detail refer to 9 6 F2 Time after defrosting 1 1 P 0 30 60 570 600 For detail refer to 9 6 F3 Time after defrosting 2 1 P 0 30 60 570 600 For detail refer to 9 6 F4 Time before oil recovery 1 1 P 0 30 60 570 600 For detail refer to 7 5 2 F5 Time before oil recovery 2 1 P 0 30 60 ...

Page 53: ... MEMO 1 46 SM830186 00 2WAY ECO i indb 46 SM830186 00 2WAY ECO i indb 46 2010 12 24 10 10 04 2010 12 24 10 10 04 ...

Page 54: ...ontrol 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 SM830186 00 2WAY ECO i indb 1 SM830186 00 2WAY ECO i indb 1 2010 09 24 18 46 37 2010 0...

Page 55: ...or 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 28 28 Detected temp by sensor 30 0 27 5 27 0 Dete...

Page 56: ... 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 1 to 3 minutes after it turns OFF The thermostat does not turn OFF for 60 minutes during the test run mode Forced thermostat ON However th...

Page 57: ...en 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 below figure If the E1 temperature and discharge air temperature are different the higher temperature is used The function of HH is identical to the au...

Page 58: ...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 Set temp Set temp 1 2 2 4 deg Indoor fan mode HH H L HH H Heating SM830186 00 2WAY ECO i indb 5 SM830186 00 2WAY ECO i indb 5 2010 09 24 18 46 39 2010 09 24 18 46 ...

Page 59: ... 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 C when the cooling thermostat is OFF or the indoo...

Page 60: ...at shipment Control temp for cooling 22 C Set temp in remote controller 20 C Control temp for heating 18 C Condition for mode change Heating Cooling Room temperature 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 Co...

Page 61: ...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 or discharge a...

Page 62: ...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 on the remote controller Clean the filter See page 5...

Page 63: ... 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 mode Set temp in remote controller 1 1 T deg A Fan...

Page 64: ...ation 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 condition can be checked SM830186 00 2WAY ECO i indb 11...

Page 65: ...ime of factory shipment U1 4 Way Cassette 4 deg 2 deg L1 2 Way Cassette 4 deg 2 deg D1 1 Way Cassette 4 deg 2 deg F1 Low Silhouette Ducted 4 deg 2 deg E1 High Static Pressure Ducted 4 deg 2 deg T1 Ceiling 4 deg 2 deg K1 Wall Mounted 2 deg 2 deg P1 Floor Standing 0 deg 2 deg R1 Concealed Floor Standing 0 deg 2 deg SM830186 00 2WAY ECO i indb 12 SM830186 00 2WAY ECO i indb 12 2010 09 24 18 46 41 201...

Page 66: ...sor 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 SM830186 00 2WAY ECO i indb 1 SM830186 00 2WAY ECO i indb 1 2010 12 08 14 27 25 2010 12 08 14 27 25 ...

Page 67: ...utdoor unit is not lit CAUTION Power outlet panel Tubing cover Front panel Front panel 8HP 10HP 12HP type Fig 1 a Front panel Power outlet panel Tubing cover Front panel 14HP 16HP type Fig 1 b Left front panel Right front panel Upper left front panel Lower right front panel Power outlet panel Tubing cover 18HP 20HP type Fig 1 c SM830186 00 2WAY ECO i indb 2 SM830186 00 2WAY ECO i indb 2 2010 12 08...

Page 68: ...ment 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 release when using the port CAUTION High press...

Page 69: ...alve 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 14HP 16HP type Nitrogen gas Manifold gauge Lo Hi Packless valve or the like Container Oil balance tube service port ...

Page 70: ...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 additionally be used to assess the system condition High pres...

Page 71: ...he 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 the failed outdoor unit from the system and operating...

Page 72: ...rant in the failed outdoor unit Short circuit the vacuum application pin CN050 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 valve on the failed outdoor unit where all the serv...

Page 73: ...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 faulty outdoor unit and short them using the clips o...

Page 74: ...ry unit Manifold gauge Lo Hi Low pressure outlet port for ø7 94mm dia connector Fig 3 b 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 18HP 20HP type Refrigerant recovery cylinder Refrigerant recovery unit Manifold gauge Lo Hi High pressure outlet port for ø7 94mm dia connector Fig 3 c SM830186 0...

Page 75: ...g 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 group control and integrated control settings NO NO NO ...

Page 76: ... ball valve with a service port has been provided in the indoor unit as shown in Fig 4 follow the instruc tions given in 2 through 6 below If the service port is instead located in the outdoor side follow the instruc tions 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 Cooling operation for all units fully close the liq...

Page 77: ... 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 CN076 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 will be isolated 5 Change the setting of controllab...

Page 78: ...over unit Lo Hi Manifold gauge Liquid tube service port for ø7 94mm dia connector 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 14HP 16HP type Refrigerant recovery cylinder Refrigerant recover unit Lo Hi Manifold gauge Liquid tube service port for ø7 94mm dia connector Fig 5 b SM830186 ...

Page 79: ...gerant 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 leave this valve closed To determine the completi...

Page 80: ... 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 pressure in the system Leave the system in this state ...

Page 81: ...ia connector Gas tube service port for ø7 94mm dia connector 14HP 16HP type Nitrogen gas Lo Hi Manifold gauge Liquid tube service port for ø7 94mm dia connector Fig 6 b 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 18HP 20HP type Nitrogen gas Lo Hi Manifold gauge High pressure outlet port for ø7...

Page 82: ...P 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 the outdoor unit where vacuum will be applied Then...

Page 83: ...s tube service port for ø7 94mm dia connector 18HP 20HP type Lo Hi Manifold gauge Vacuum pump High pressure outlet port for ø7 94mm dia connector Fig 7 c 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 14HP 16HP type Lo Hi Manifold gauge Liquid tube service port for ø7 94mm dia connector Vacuum p...

Page 84: ... 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 valve Next fully close the manifold gauge valves...

Page 85: ...ssor 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 with push to release valve to the DPR Discharge Press...

Page 86: ...or 14HP 16HP type DPR Upper valve Lower valve Close Close Manifold gauge Lo Hi Fig 11 b 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 18HP 20HP type DPR Upper valve Lower valve Close Close Manifold gauge Lo Hi Fig 11 c SM830186 00 2WAY ECO i in...

Page 87: ...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 Refrigerant When a compressor has been replaced or in any o...

Page 88: ...m 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 tube service port for ø7 94mm dia connector Gas t...

Page 89: ...t 3 Connect the outdoor unit maintenance remote controller to the RC connector CN077 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 units Check that all units are operating in Heating ...

Page 90: ...gerant 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 closed beforehand A Schrader type push to release va...

Page 91: ...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 that no air enters the tubing at this time 11 Ope...

Page 92: ...ed and non electrified parts 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 required 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 t...

Page 93: ...nt 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 CN050 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...

Page 94: ...l 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 refrigerant was not possible fully close the high pressure ...

Page 95: ...pin CN050 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 of recovered refrigerant was not possible fu...

Page 96: ...ere 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 attached pressurize with 3 8 MPa of nitrogen from the ...

Page 97: ...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 steps refer to 6 17 in A on the previous page Liquid...

Page 98: ...esponding parts from the outdoor unit where the compressor will be replaced 3 Remove the cap and acoustic material that surrounds the compressor 4 Remove the cap at the compressor terminal plate Disconnect the power cable 5 Remove the crankcase heater 6 Disconnect the tube with flare nut using wrenches At this time cover the tube in place with waste cloth while watching out for oil leaks Then cap ...

Page 99: ... the discharge tubing using a crowbar as a lever Remove the cushioning rubber using a crowbar Place something at the contact to protect the bottom plate from damage First insert something between the compressor and suction tubing to protect from damage Then take up the suction tubing using a crowbar as a lever NOTE If oil remaining in the compressor reaches the equalized oil level oil will come po...

Page 100: ... piece of cushioning rubber in the designated positions on the compressor 4 Place the new compressor When setting the compressor into the unit be careful not to cause any abnormal deformation of the tube with flare nut CAUTION First temporarily fix the cushioning rubber and bolt in the back Then place the compressor After the position in the back is fixed adjust the two positions in front using a ...

Page 101: ...k for looseness of the power terminal connection at the compressor terminal plate and to check by pulling vertically on the connections If the terminals become disconnected easily replace the wiring Assy CAUTION 13 Follow the instructions in 6 Evacuating System and apply vacuum to the outdoor unit where the compressor was replaced B Replacing the constant speed compressor 1 For models U 10ME1E8 E ...

Page 102: ...flare nuts 7 Remove the bolts 3 locations washers and spacers Use a crowbar to remove the cushioning rubbers just like inverter compressor removal procedure Protect the sensors and surrounding plates rubber lead wires clamps and other items Pay particular attention to protection of the oil equalizer tube connector parts and removal of the discharge sensor An O ring is mounted inside the oil equali...

Page 103: ... during removal pay particular attention to protection of the oil equalizing tube connector parts An O ring is mounted inside the oil equalizer tube connector parts It must be protected and do not lose it CAUTION 9 Follow the instructions in 5 Checking for Leakage After Repair and check for leaks at the outdoor unit where the compressor was replaced 10 Re install the cap and acoustic material Be s...

Page 104: ...rial that surrounds the compressor These areas are easily torn Be careful not to damage 4 Remove the cap at the compressor terminal plate Disconnect the power cable 5 Remove the crankcase heater 6 Disconnect the tube with flare nut using wrenches At this time 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 comp...

Page 105: ...ed and do not lose it CAUTION 9 Disconnect the discharge tubing Pull up the discharge tubing holding it with wet cloth 10 Disconnect the suction tubing Protect the surrounding wiring clamps and rubber bands when brazing 11 Pull the compressor toward you 8 Remove the rubber band fixing the two tubes Cut the clamp and remove the rubber band First disconnect the upper part of the suction tubing A sid...

Page 106: ... lose it CAUTION 9 Follow the instructions in 5 Checking for Leakage After Repair and check for leaks at the outdoor unit where the compressor was replaced 10 Reinstall the rubber band to fix the two tubes Section A of cushioning rubber Ring Insert A of the cushioning rubber securely to the leg of the compressor when attaching the bolt Then attach the ring If A is not inserted properly it may dama...

Page 107: ...rial that surrounds the compressor These areas are easily torn Be careful not to damage 4 Remove the cap at the compressor terminal plate Disconnect the power cable 5 Remove the crankcase heater 6 Disconnect the tube with flare nut using wrenches At this time 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 comp...

Page 108: ...ring is mounted inside the oil equalizer tube connector parts It must be protected and do not lose it CAUTION 9 Disconnect the discharge tubing Pull up the discharge tubing holding it with wet cloth 10 Disconnect the suction tubing 11 Pull the compressor toward you 8 Remove the rubber band fixing the two tubes Cut the clamp and remove the rubber band Cover this position with cloth and pull up Cove...

Page 109: ... lose it CAUTION 9 Follow the instructions in 5 Checking for Leakage After Repair and check for leaks at the outdoor unit where the compressor was replaced 10 Reinstall the rubber band to fix the two tubes Section A of cushioning rubber Ring Insert A of the cushioning rubber securely to the leg of the compressor when attaching the bolt Then attach the ring If A is not inserted properly it may dama...

Page 110: ...E 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 SM830186 00 2WAY ECO i indb 1 SM830186 00 2WAY ECO i indb 1 2010 11 28 12 07 40 2010 11 28 12 07 40 ...

Page 111: ...ating 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 controller are still required for the indoor units...

Page 112: ...s 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 Temperature monitor Displays the indoor outdoor unit se...

Page 113: ... 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 mode 1 and setting mode 2 can be used The overall system status for that refrigerant system is displayed Special service checker wiring PCB connector 3P BLU RC 3P BLU Outdoor unit PCB Relay connector 2P WHT Re...

Page 114: ... indoor unit with the lowest unit No 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 not displayed on the outdoor unit maintenance remote controller Fig 2 LED Double speed Do not u...

Page 115: ...9999 hrs Compressor 2 operating time 0 99999999 hrs Compressor 3 operating time Compressor 1 oil level 0 Empty 1 Insufficient 2 Sufficient Compressor 2 oil level 0 Empty 1 Insufficient 2 Sufficient Compressor 3 oil level Outdoor unit power ON time 0 99999999 hrs Compressor 1 operation count 0 65535 times Compressor 2 operation count 0 65535 times Compressor 3 operation count Alarm history 1 most r...

Page 116: ...ystem 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 connected indoor units 4 units connected Sample displays 02 Unit Nos 1 2 3 and 4 are connected Fig 3 Fig 4 Fig 5 SM830186 00 2WAY ECO i indb 7 SM830186 00 2WAY ECO i indb 7 2010 11 28 12 07 46 2010 11 28 12 07 46 ...

Page 117: ... 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 be changed by pressing the FLAP button NOTE With the ...

Page 118: ... and operations are the same as for monitor mode using the indoor unit remote controller Press the button and select the indoor unit to monitor 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 To end monitoring press the CHECK button The display returns to the normal displ...

Page 119: ...changer 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 STEP MOV4 pulse STEP Heat exchanger gas 3 C Heat exchanger liquid 3 C Low pressure sensor temp C Suction temp C Oil 1 C Oil 2 C Oil 3 C Actual operating frequency Hz NOTE 0A and subsequent items are outdoor unit data...

Page 120: ... and select the outdoor unit for which to monitor the alarm history 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 Outdoor unit system address YY Outdoor unit sub bus ad...

Page 121: ...n the first 4 digits are displayed the top dot of the colon is illuminated To exit the setting mode 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 sensor usage 0 Sensor input not present Control is performed 1 Sensor input present Control is performe...

Page 122: ... 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 first 4 digits Fig A and the last 4 digits Fig B When the first 4 digits are displayed the top point of the colon is lit To exit setting mode press the CHECK button Returns to the normal display mode A B 1 5...

Page 123: ... MEMO 4 14 SM830186 00 2WAY ECO i indb 14 SM830186 00 2WAY ECO i indb 14 2010 11 28 12 07 54 2010 11 28 12 07 54 ...

Page 124: ... 1 5 5 REMOTE CONTROLLER FUNCTIONS 1 Simple Settings Function 5 2 2 Detailed Settings Function 5 4 3 Remote Controller Servicing Functions 5 17 SM830186 00 2WAY ECO i indb 1 SM830186 00 2WAY ECO i indb 1 2010 09 24 18 46 52 2010 09 24 18 46 52 ...

Page 125: ...r 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 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 indoor units Press the temperature setting buttons to ...

Page 126: ...005 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 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...

Page 127: ...de 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 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 Press the temperature setting buttons to select t...

Page 128: ...o 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 3 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 performing these steps 4 1 Press and hold the simultane...

Page 129: ...it 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 0002 Sub unit All group control indoor units except for main unit 0099 Not set Cooling intake temperature shift 010 Shifts intake temperature by 10 C 009 Shifts intake temperature by 9 C 001 Shifts intake ...

Page 130: ...imit 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 shipment 0018 18 C Lower limit 0026 26 C 0027 27 C Upper limit at shipment Humidifier operation 0000 Normal 0001 Ignore heat exchanger temperature conditions Filter CN70 input switching 0000 Filter input differen...

Page 131: ...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 fan is operating 0001 Fan mode operation output Drain pump delayed start time 0000 No delayed start 0001 1 sec delayed start 0002 2 sec delayed start 0058 58 sec delayed start 0059 59 sec delayed start 0060 60 sec delayed start Humidifier ...

Page 132: ...sly 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 Setting the Flap Separately Only for 4 way Cassette type S...

Page 133: ...00 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 2500 0006 High Static Pressure Ducted E1 1250 2500 1250 5000 2500 0007 Ceiling T1 2500 1250 2500 1250 0008 Wall Mounted K1 150 75 0010 Floor Standing P1 150 75 0011 Concealed Floor Standing R1 150 75 Unit hour...

Page 134: ...e 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 will not be possible When the priority remote contr...

Page 135: ...mperature 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 when heater thermostat is OFF Normally humidifying d...

Page 136: ...fficult 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 between the room temperature and the temperature se...

Page 137: ... 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 stopped Use a ventilation fan that can accept the no ...

Page 138: ...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 therefore sets the ON time per 60 second interval 5F ...

Page 139: ...nector 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 Fig 5 Connect the jumper connector 2P ...

Page 140: ...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 address central control address and other settings Press and hold the and buttons for 4 ...

Page 141: ...rmostat forced ON Procedure Press and hold the button for 4 seconds or longer Test appears on the remote controller LCD display Fig 6 Start operation Press the button to return to normal remote controller display Fig 6 2 3 1 4 CZ RTC2 SM830186 00 2WAY ECO i indb 18 SM830186 00 2WAY ECO i indb 18 2010 09 24 18 47 03 2010 09 24 18 47 03 ...

Page 142: ...f the 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 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 Press the button to return to normal remote controller display 1 2 3 4 5 Display shows...

Page 143: ... 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 inspection 16 36 56 For inspection 17 37 57 Discharge temp 3 18 38 58 CT3 19 39 59 For inspection 1A 3A 5A For inspection 1B 3B 5B Heat exchanger gas 3 1C 3C 5C Heat exchanger liquid 3 1D 3D 5D Low pressure senso...

Page 144: ... 2 Outdoor Unit Control Panel LED Display 6 4 3 Remote Controller Servicing Functions 6 5 4 2WAY Alarm Codes 6 7 5 Blinking Inspection Display on the Remote Controller 6 28 6 Inspection of Parts 6 30 7 Test Pin 6 31 SM830186 00 2WAY ECO i indb 1 SM830186 00 2WAY ECO i indb 1 2010 12 25 8 46 42 2010 12 25 8 46 42 ...

Page 145: ...communication signal from sub indoor units E18 During auto address setting number of connected units does not 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 E16 E20 E15 No indoor unit is connected during auto address setting Main outdoor...

Page 146: ...door unit fan trouble INV compressor start failure Missing phase or lock alarm P29 P22 P16 Failure of nonvolatile memory IC EEPROM on indoor unit control PCB F29 Failure of nonvolatile memory IC EEPROM on outdoor unit control PCB F31 Protective device Overload current detected H11 Compressor 2 constant speed Compressor 2 constant speed Compressor 2 constant speed Compressor 2 constant speed Compre...

Page 147: ...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 the number that was set Both blinking Alarm displ...

Page 148: ...ture 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 If group control is in effect press the button to change to the unit you wish to monitor Press the CHECK button to return to normal remote controller operation Note Th...

Page 149: ...or 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 pressure sensor temperature Heat exchanger gas 3 Heat exchanger gas 1 Heat exchanger liquid 3 Heat exchanger liquid 1 Low pressure sensor temperature Heat exchanger gas 2 Detected reservoir tank temp Heat exc...

Page 150: ...or trouble at outdoor heat exchanger 1 In Liquid temperature sensor trouble at outdoor heat exchanger 1 Out Outdoor air temperature sensor trouble Compressor intake temperature sensor trouble High pressure sensor trouble Low pressure sensor trouble Gas temperature sensor trouble at outdoor heat exchanger 2 In Liquid temperature sensor trouble at outdoor heat exchanger 2 Out Outdoor unit non volati...

Page 151: ...ted 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 22 P14 6 25 O2 sensor differential alarm Only when optional O2 sensor supplied P20 6 26 High load alar...

Page 152: ...ss 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 automatic address setting to be completed at the outdoor uni...

Page 153: ...at all indoor units in the system Check 2 Check whether serial connector 1 CN001 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 unit to the indoor units has been cut 1 Check...

Page 154: ... 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 cut 2 After initial communications were completed the RC connector became disconnected 3 The pow...

Page 155: ...uddenly 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 still uncertain check the following to determine whe...

Page 156: ...en 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 short circuit 2 A D step is 1014 steps or more open...

Page 157: ...emperature 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 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 senso...

Page 158: ... 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 converted saturation temperature will never be lower than any indoor unit E1 temperature During cooling this temperature will never be lower than the outdoor unit liquid temperature 2 Failure to open the s...

Page 159: ... 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 however reducing it too much will increase the likelihood of alarms related to low oil level scroll side the low pressure SW and discharge temperature Use caution Example This alarm may result when the se...

Page 160: ...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 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 possiblility of a magnet SW failure Therefore check the phase vol...

Page 161: ...r 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 Compressor 2 discharge temperature sensor disconnected Compressor 3 discharge temperature sensor disconnected Alarm conditions This alarm occurs when the discharge sensor temperature detector is not inserted into the tube s sensor holder or when...

Page 162: ...ler difference between low pressure and high 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 refrigerant circuit it can freeze at the low pressure locations and the resulting ice can block the circuit If the alarm occurs when there is sufficient refriger...

Page 163: ...larm 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 SM830186 00 2WAY ECO i indb 20 SM830186 00 2WAY ECO i indb 20 2010 ...

Page 164: ...ound 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 Communication...

Page 165: ...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 and the PCB circuit Correction Example Notes L18 4 w...

Page 166: ...temperature of the other compressor decreases 5 Accumulation of refrigerant in stopped outdoor units Trouble System is OK when all outdoor units are operating however symptoms of insufficient gas occur when a certain outdoor unit is stopped Condensation or frost is visible up to the top of the accumulator of the stopped outdoor unit After an outdoor unit stops there is the sound of refrigerant flo...

Page 167: ...essively high 5 During cooling check 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 in the indoor unit are clogged If clogged clean the filters 7 During heating check whether an air short blockage has occurred in the indoor unit The system operates...

Page 168: ...rent alarm This alarm occurs when current trouble or current detection trouble occur when trouble judgment current is detected in the primary or secondary current or when an instantaneous secondary current of 18A or higher is detected 1 When more than the over current values shown in the table were detected in the primary and secondary current 2 When more than the current values shown in the table...

Page 169: ... 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 cause Check Correction Example...

Page 170: ...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 the DCCT output terminal on the rear of the PCB a...

Page 171: ... 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 is not engaged in cases of alarms ot...

Page 172: ...gnet SW 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 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 circuit failure or PCB failure A D failure CT c...

Page 173: ...ntrol 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 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 ...

Page 174: ...y RY013 Supercooling valve 2 SCV2 12 Relay RY019 Pressure balance valve 2 PBV2 3 Relay RY016 Discharge valve 2 DCV2 13 Relay RY002 Crankcase 2 CH2 4 Relay RY015 Discharge valve 1 DCV1 14 Relay RY001 Crankcase 1 CH1 5 Relay RY014 Bypass valve BPV 15 Relay RY014 Supercooling valve 3 SCV3 6 Relay RY006 Recovery valve ORVR 16 Relay RY017 Discharge valve 3 DCV3 7 Relay RY005 Balance valve BALV 17 Relay...

Page 175: ... MEMO 6 32 SM830186 00 2WAY ECO i indb 32 SM830186 00 2WAY ECO i indb 32 2010 12 25 8 47 28 2010 12 25 8 47 28 ...

Page 176: ...GB ES FR DE IT PT GR 201012 SM830186 00 2WAY ECO i indb 1 SM830186 00 2WAY ECO i indb 1 2010 12 25 8 47 28 2010 12 25 8 47 28 ...

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Panasonic U-8ME1E8E, Service Manual, Page: 19 / 176

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