Sanyo 2-WAY ECO-i SPW-2-WAY ECO-i UR124SXH56B Service Manual Download Page 70

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W-2WAY ECO-i SYSTEM

Outdoor Unit Repair Procedures

10. Compressor

Installation

(1)

Remove the 2 brazed tube caps (2 pieces) from the compressor.

(2)

Remove hexagonal caps from the compressor.

* When removing the hexagonal caps, hold the fixing nut at the main unit side so as not to loose it with a

wrench or spanner. And then, loosen and remove the hexagonal cap.

(3)

Remove the oil equalizer tube connector parts along with the O-ring from the removed compressor and

mount them on the replaced new compressor.

(4)

Install the crankcase heater onto the new compressor.

(5)

Temporary mount 2 cushion rubbers with bolts at the position as shown in the figure 27.

Set up the leg of the the new compressor onto the 2 cushion rubbers.

Fig. 26

Oil equalizer tube
connector parts

O-ring

Hexagonal cap

Fixing nut
at the main unit side

Fig. 27

Front view

Cushion rubbers

Bolts

(Temporary mounting: 2 locations

at back side, each 1 piece)

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Summary of Contents for 2-WAY ECO-i SPW-2-WAY ECO-i UR124SXH56B

Page 1: ...6B SPW UR94GXH56 A B U095XH UR94SXH56B SPW UR124GXH56 A B U125XH UR124SXH56B SPW UR164GXH56 A B U165XH UR164SXH56B SPW UR184GXH56 A B U185XH UR184SXH56B SPW UR254GXH56 A B U255XH UR254SXH56B SPW UR304SXH56B SPW UR364GXH56 A B U365XH UR364SXH56B SPW UR484GXH56 A B U485XH UR484SXH56B SPW UR604GXH56 A B U605XH UR604SXH56B US Concealed Duct SPW US075XH SPW US095XH SPW US125XH SPW US165XH SPW US185XH T...

Page 2: ...i W 2WAY ECO i SYSTEM Cover indd b W 2WAY ECO i SYSTEM Cover indd b 2008 09 04 16 07 47 2008 09 04 16 07 47 ...

Page 3: ...ii W 2WAY ECO i SYSTEM Cover indd c W 2WAY ECO i SYSTEM Cover indd c 2008 09 04 16 07 47 2008 09 04 16 07 47 ...

Page 4: ...AIR PROCEDURES 2 1 1 Removing Panels 2 2 2 Removing Electrical Component Box and Duct 2 3 3 Discharging Compressor Oil 2 5 4 Backup Operation 2 6 5 Recovering Refrigerant 2 9 6 Checking for Leakage After Repair 2 14 7 Evacuating System 2 15 8 Charging Compressor Oil 2 16 9 Pumping Out Refrigerant from Outdoor Unit 2 20 10 Compressor 2 23 11 High and Low Pressure Sensors 2 38 12 Replacing 4 way Val...

Page 5: ...ntrol Panel LED Display 5 4 3 Remote Controller Servicing Functions 5 5 4 W 2WAY ECO i Alarm Codes 5 7 5 Blinking Inspection Display on the Remote Controller 5 27 6 Inspection of Parts 5 28 7 Test Pin 5 29 W 2WAY ECO i SYSTEM Cover indd e W 2WAY ECO i SYSTEM Cover indd e 2008 09 04 18 26 17 2008 09 04 18 26 17 ...

Page 6: ...tic Expansion Valves MOV1 MOV2 MOV4 1 17 8 Outdoor Fan Control 1 19 9 Demand Control 1 20 10 Indoor Unit Control of the Electronic Control Valve 1 21 11 Rap Valve Kit Control 1 23 12 Indoor Unit Refrigerant Oil Self Recovery Control 1 24 13 Discharge Temperature 1 25 14 Current Protection 1 26 15 Pressure Sensor Failure 1 27 16 Backup Operation 1 28 17 Service Maintenance Functions 1 30 18 Other F...

Page 7: ...he max system capacity shall be within 48PS The CCU functions are disabled at all units except the unit that is set as unit No 1 Therefore no problems will result even if the system address No of indoor units and No of outdoor units settings are made at the other units However making these settings may be convenient for manual backup operation as it eliminates the necessity of making the settings ...

Page 8: ...outdoor units are designed to operate simultaneously Therefore all the outdoor units will stop at a time when any one unit is stopped In heating mode the out door unit which has the inverter compressor with the shortest amount of operating time continues to run and rest of the other outdoor units may be stopped 2 1 Outdoor Unit Operating Rules Because in this system all outdoor units contain an in...

Page 9: ... accordingly Constant speed compressors run in order of the shortest amount of operating time In heating mode the inverter compressor with the shortest amount of operating time runs at first followed by the compressors in order of the shortest amount of operating time including inverter units Immediately after installation all compressors have an operating time of zero In this case the compressors...

Page 10: ...ontrol operation during the special controls start control defrost control refrigerant oil recovery control etc which are described later 3 6 Roadmap Control 1 The below mentioned Roadmap Control are performed according to the pressure sensor on the outdoor unit and the 2 temperature sensors attached to the indoor unit heat exchanger coil With the roadmap control in heating mode the pressure detec...

Page 11: ...evaporation temperature This is used for additional charging of refrigerant test run checking etc Vapor may be discharged if the test run continues for a long time However this does not indicate problems 2 Even within the same area the compressor capacity varies depending on the refrigerant temperature 3 For 6 minutes after the compressors start area C is considered to be area B for control purpos...

Page 12: ... time the compressor starts it may restart from a lower capacity 3 Compressor Control 3 6 3 Protection control Protection control consists of 2 types of protection discharge temperature protection and current protection The limit values from this protection control are incorporated into the output compressor capacity increase decrease values that were calculated from control based on the temperatu...

Page 13: ...ompressor current control is composed of primary current control and secondary current control Cur rent protection control for the inverter compressor is performed by self protection in the inverter circuit and does not increase or decrease the compressor capacity 16 0A 16 5A 75 0A or 150 13 5A 13 0A 12 5A 12 0A 90Hz 80Hz 14 5A 13 5A Primary current Secondary current Inverter compressors stop HIC ...

Page 14: ...tubing recovery of the refrigerant is performed This control can also compensate for tubing thermal loss by radiation during heating start as well as for oil recovery 1 Cooling control when the outdoor unit heat exchanger is acting as a condenser 60 seconds Outdoor Units Indoor units When the above operation is finished normal operation starts at the horsepower determined by the indoor units where...

Page 15: ...after restart occurs Outdoor units Indoor units Control time Electronic Thermostat Expansion Valve RAP valve kit Fan All outdoor units operate at maximum horsepower Maximum 3 minutes Stops once before and once after control Valves at all indoor units operate at a fixed pulse according to the indoor unit capacity Valve kits at all indoor units operate in Cooling mode OFF status Fan operates at the ...

Page 16: ...s 1 outdoor unit and no thermal storage tank in a refrigerant system a reverse cycle defrost will be carried out Defrost flow E Evaporator operation C Condenser operation E C Switching from evaporator operation to condenser operation C E Switching from condenser operation to evaporator operation 25 23 10 The frost detection area is located under the thick lines L2 L1 3 21 4 8 1 10 10 External temp...

Page 17: ...efrost end judgment 1 min 1 min 1 min Max 6 min Max 6 min Thermostat ON Thermostat OFF Outdoor unit s where defrost occurs first Outdoor compressor s where defrost occurs first Outdoor unit s where defrost follows later Outdoor compressor s where defrost follows later Switch Defrost preparation 4 3 6 Outdoor unit cycle defrost Outdoor unit cycle defrost is performed in systems where 2 or more outd...

Page 18: ...However if there is any other outdoor unit where the defrost end condition has not been met defrost control continues for all outdoor units and system defrost control is not ended Condition 2 The maximum defrost time listed in the table above has elapsed 4 3 8 System defrost end When all outdoor units where defrost control is in effect have met the defrost end conditions defrost control is ended f...

Page 19: ...he outdoor unit dose not become 2 Oil supply is performed for a maximum of 5 minutes from each unit 2 When oil supply is ended oil supply from that outdoor unit will not occur again for a period of No of outdoor units minus1 x 5 minutes In addition oil supply is ended if the oil receiving outdoor unit oil level changes to 2 or if the oil supply outdoor unit oil level becomes low 3 The supply of oi...

Page 20: ...it heat exchanger is functioning as an evaporator When the valve determines that there are signs of excess refrigerant refrigerant is recovered at the receiver tank This valve is ON during heating operation and when the outdoor unit heat exchanger is functioning as an evapora tor during mixed heating cooling operation It also turns ON in order to recover refrigerant at the outdoor unit after heati...

Page 21: ...is valve turns ON for 120 seconds after defrost control ends F This valve turns ON for 10 seconds after the outdoor unit stops G This valve remains OFF at all times other than A through F above 6 4 Bypass Valve BPV This valve flushes the oil from the balance tubes In addition it is used for recovering refrigerant from stopped out door units during cooling operation 1 When unit is stopped This valv...

Page 22: ... Expansion Valves SPW C0705DXHN8 C0905DXHN8 C1155DXHN8 C1305DXHN8 C1405DXHN8 7 2 Power Initialization If no indoor units have started even once after the power was turned ON the outdoor unit electronic control valve operates at 480 pulses 7 3 Heat Exchangers which are controlled by each Electronic Thermostatic Expansion Valve The configuration of heat exchangers is as shown in the figure below MOV...

Page 23: ... sensor 2 Operation when discharge temperature is high When the discharge temperature increases the SC circuit electronic thermostatic expansion valve opens to 480 pulses to cool down the compressor This operation takes priority over operation intended to increase SC It is performed at top priority in all operating modes In addition the valve opening adjustment will be made when the discharge temp...

Page 24: ...cient refrigerant gas are detected at an indoor unit 2 When all indoor units are operating in heating mode A If the condensation temperature is low the fan mode is increased at regular intervals B If the condensation temperature is high the fan mode is decreased in order to prevent excessive loads C The fan mode may be increased when the outdoor liquid temperature drops to 7 C or below 8 5 Snow Re...

Page 25: ...Input present Input not present 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 this device For more information refer to the field application func tions The rated current indicates the current value that is listed in the catalog or similar materi...

Page 26: ...rated temp E1 may be controlled between 5 C to 40 C Position of electronic control valve Outdoor unit operating Outdoor unit stopped Stopped 20 20 Fan 20 20 Thermostat OFF 20 20 Cooling Thermostat ON Performs SH control in the range of 55 480 pulses Position of electronic control valve Outdoor unit operating Outdoor unit stopped Stopped 20 20 Fan 20 20 Thermostat OFF 20 20 Heating Thermostat ON Pe...

Page 27: ...control according to indoor unit capacity Thermostat ON Fixed pulse for heating according to indoor unit capacity Reverse cycle defrost control Heating Heating Thermostat OFF Heating control according to indoor unit capacity However position is 20 pulses for Types D and GU Stopped 60 pulses Fan 60 pulses Thermostat ON 60 pulses Outdoor cycle defrost control Cooling heating Heating Thermostat OFF 6...

Page 28: ...unit electronic thermostatic expansion valve are as shown in the table Electronic thermostatic expansion valve Gas tube valve Stopped OFF Fan OFF Thermostat ON ON Cooling Thermostat OFF ON Thermostat ON OFF Heating Thermostat OFF OFF 20 pulses 20 pulses 20 pulses Superheat control 65 480 20 pulses Superheat control 50 480 11 Rap Valve Kit Control sec1 document qxd 05 179 1 2 qxd 08 8 22 1 51 PM Pa...

Page 29: ...ndoor unit expansion valve is opened regularly for 1 to 2 min utes regularly at an interval of once every 2 hours 2 During the thermostat ON the indoor unit electronic thermostatic expansion valve is opened about 10 pulses from the current status 12 Indoor Unit Refrigerant Oil Self Recovery Control sec1 document qxd 05 179 1 2 qxd 08 8 22 1 51 PM Page 24 ...

Page 30: ...opped for 60 minutes In this case possible causes include sensor failure and compressor overheating caused by an insufficient level of refrigerant The alarm also occurs if the sensor temperature is at or above the abnormal temperature 80 C when 20 min utes have passed after the compressor stopped In this case it is possible that the discharge temperature from a different outdoor unit is being dete...

Page 31: ...e constant speed compressor is operating Compressor 3 constant speed compressor H23 Occurs when a current value of 1 5 A or less is detected when the constant speed compressor is operating Compressor No Compressor 2 Compressor 3 Detected current Overcurrent Lock current Overcurrent Alarm display H11 H12 H21 H22 Lock current Outdoor unit type Constant speed compressor Overload current A Lock curren...

Page 32: ...roken wiring short circuit or poor connection to the PCB in the high pressure sensor circuit 2 Low pressure sensor failure Alarms are emitted when the low pressure sensor becomes an electrical open circuit or a short circuit condi tions and a broken wiring short circuit or poor connection to the PCB in the low pressure sensor circuit High pressure sensor failure Low pressure sensor failure Alarm d...

Page 33: ...equired for special control such as 4 way valve adjustment or other system purposes 4 Alarm display If a wired remote controller is present display blinks during operation 5 Canceling automatic backup operation Repair the outdoor unit where the failure occurred When repairs are completed reset the power on outdoor unit No 1 Caution After automatic backup mode has been engaged it will not be cancel...

Page 34: ...r 3 backup ON OFF ON OFF C Close all service valves at the failed outdoor units D Reset the power at outdoor unit No 1 When the PCB of the main unit is normal by implementing the above settings while leaving the communica tion lines between indoor and outdoor units as they are backup operation of units are possible In this case the outdoor unit that backed up all compressors is not identified as a...

Page 35: ...stems from starting at the same time when opera tion is restarted after multiple operating systems were stopped due to a power outage or other cause 17 4 Automatic Backup Outdoor EEPROM 48 set only on outdoor unit No 1 Automatic backup is set to occur at the time the unit is shipped from the factory However the automatic backup function can be disabled by changing this setting to 1 0 No delayed st...

Page 36: ...or unit static pressure of approximately 6 0 mmAq 8 10 12 hp models only 0 1 2 3 4 5 6 1 1 8 2 6 3 5 4 3 5 2 6 0 600 630 670 710 740 770 800 17 7 Compressor Operating Sequence Outdoor EEPROM 46 set at outdoor units which include CCU functions When this setting is set to 1 the compressors start in sequence beginning from the No 1 outdoor unit The setting is 0 at the time of shipment With this setti...

Page 37: ... every 10 minutes Therefore the outdoor fan may continue operating for up to 10 minutes even when there is no snowfall sensor input In addition the outdoor fan may remain stopped for up to 10 minutes when snowfall sensor input is present 18 2 Function for Automatic Judgment of Insufficient Refrigerant Gas and Overcharge This system includes a simple function for judging the level of refrigerant Ho...

Page 38: ...mptoms of overcharge These are only guidelines therefore the judgment may vary depending on the installation conditions load char acteristics and other elements The high pressure sensor temperature is 57 C or higher and the difference Pressure sensor temp Liquid temp at that outdoor unit is large 15 C or more There is an indoor unit where the position of the electronic control valve is much higher...

Page 39: ...arging Compressor Oil 2 5 4 Backup Operation 2 6 5 Recovering Refrigerant 2 9 6 Checking for Leakage After Repair 2 14 7 Evacuating System 2 15 8 Charging Compressor Oil 2 16 9 Pumping Out Refrigerant from Outdoor Unit 2 20 10 Compressor 2 23 11 High and Low Pressure Sensors 2 38 12 Replacing 4 way Valve 2 40 sec2 document qxd sec2 document qxd 08 8 22 1 39 PM Page 1 ...

Page 40: ...ystem 8 Charging Compressor Oil 9 Pumping Out Refrigerant from Outdoor Unit when repairing parts other than compressor 10 Compressor 11 High and Low Pressure Sensors 12 Replacing the 4 way Valve 1 Front panel removal Fig 1 Remove the front panel remove 11 screws 2 Power outlet panel valve cover removal Fig 2 Remove the power outlet panel remove 2 screws Remove the tubing cover remove 2 screws Fig ...

Page 41: ... terminals of the magnetic contactor for the compressor 5 Remove the electrical component box remove 2 screws Fig 4 Be sure to release the locking mechanism before disconnecting each connector 6 Remove the center duct Fig 5 The center duct is fitted into the upper and lower ducts and held in place by the electrical component box an arrangement that makes possible indepen dent removal of the center...

Page 42: ... Procedures 2 Removing Electrical Component Box and Duct 7 Remove the lower duct remove 2 screws and a hook 8 Remove the upper duct remove 3 screws Fig 7 Lower duct Upper duct Fig 6 Fig 7 sec2 document qxd sec2 document qxd 08 8 22 1 39 PM Page 4 ...

Page 43: ... unit following the procedures in 5 Recovering Refrigerant Remove the compressor and discharge the oil in it Refer to 10 Compressor for detailed procedures 3 3 Checking the Oil Acceptance rejection criteria for the oil 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...

Page 44: ...nits If the power is not reset on the control PCB of the No 1 outdoor unit main unit backup mode operation will continue after the repairs are completed Backup operation is intended as emergency operation until repairs are made Have repairs made as soon as pos sible 4 2 Manual Backup This backup operation is the conventional method of backup operation It involves disconnecting the failed outdoor u...

Page 45: ...rigerant in the system After adjusting the amount of refrigerant close the gas tube valve at the failed outdoor unit Collecting refrigerant in the failed outdoor unit Short circuit the vacuum application pin CN102 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 unit...

Page 46: ...ssor Setting for backup operation OK OK Failed DIP switch S010 Turn BACK UP and AC2 ON OK Failed OK DIP switch S010 Turn BACK UP and AC1 ON OK Failed Failed DIP switch S010 Turn BACK UP AC1 and AC2 ON Failed OK OK DIP switch S010 Turn BACK UP and INV ON Failed OK Failed DIP switch S010 Turn BACK UP INV and AC2 ON Failed Failed OK DIP switch S010 Turn BACK UP INV and AC1 ON sec2 document qxd sec2 d...

Page 47: ...ant recovery unit and recovery cylinder using hoses To avoid the entry of air into the refrigerant tubing carry out this connection work carefully Fig 9 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 5 Locate the AP Air Purge pins on the c...

Page 48: ...oling operation for all units Ball valve is provided in the indoor unit Turn off all equipment in system Replace or repair faulty unit Check for leakage in repaired unit Evacuate air from repaired unit Ready for operation END Charge refrigerant in repaired unit Amount of charge should equal that recovered by refrigerant recovery unit Charge refrigerant in repaired unit H Amount of charge should eq...

Page 49: ... tubing with fingers to determine that the unit is running in cooling mode 5 2 2 Refrigerant recovery procedures 1 using indoor unit ball valve 1 If a ball valve with a service port has been provided in the indoor unit as shown in Fig 10 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 5 2 3 Refrigerant recov...

Page 50: ... Be sure that you do NOT grasp the lead wire when pulling out the con nector Removing any other connector may not cause the units to stop Therefore be sure to pull out the SCT connector only It is not necessary to recover the refrigerant from the balance tube Therefore do not operate the balance tube valve Turn off power to all equipment in the system Then pull out the RC1 connector 4P BLU CN106 o...

Page 51: ... Fig 11 Remaining refrigerant may cause internal pressure Check that each valve on the manifold gauge valves is tightly closed The connection port uses a Schrader type push to release valve 5 Connect the manifold gauge valves refrigerant recovery unit 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...

Page 52: ...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 3 MPa Then measure both the outdoor ambient temperature and the pressure in the system Leave the system in t...

Page 53: ... 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 5 Turn the power ON at the outdoor unit where vacuum will be app...

Page 54: ...o the atmosphere DPR 623 081 7937 Nipple Packless valve Receiver tank 638 015 2988 Perform oil charging work carefully so that no liquid refrigerant enters 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 ...

Page 55: ...e 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 Pressure Regulator Carry out the connection work quickly to avoid letting ...

Page 56: ...ese 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 To determine the completion of refrigerant recovery follow the instructions that came with the refrigerant recovery unit 8 2 If Outdoor Unit Has Not Been Charged with Refrigerant When a compressor has been re...

Page 57: ...used for additional oil charging after compressor replacement refer to 8 1 If Refrigerant Has Already Been Charged to Outdoor Unit Model name Compressor model Qʼty Pre charged amount of oil liters SPW C0705DXHN8 C 9RVN273H0U 1 1 9 Inverter controlled rotary compressor SPW C0905DXHN8 C 9RVN273H0U 1 1 9 Inverter controlled rotary compressor JT160G KTYE 1 2 1 Constant speed scroll compressor SPW C115...

Page 58: ...each connection port 3 Connect the outdoor unit maintenance remote controller to the RC connector CN006 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 op...

Page 59: ...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 closed beforehand A Schrader type push to r...

Page 60: ...lve on the outdoor unit to be repaired 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 Open both Hi and Lo side valves on the manifold gauge valves and recover the refrigerant remaining in the outdo...

Page 61: ...ectrified and non electrified parts a Motor Min 300 MΩ b Compressor Min 100 MΩ servicing part c Unit Min 10 MΩ This is due to the presence of refrigerant which decreases the insulation resistance Minimum insulation resistance as required by generally accepted requirements is 1 MΩ Reference Symptoms of motor burning 1 Ground fault results in breaker operation 2 Short circuit results in different co...

Page 62: ...nt 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 CN102 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 ...

Page 63: ...Next turn the power OFF at the repaired outdoor unit then remove the short circuit at the AP pin CN102 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 4 Backup Operation and perform backup opera tion recovery 8 If charging wi...

Page 64: ...friger ant will enter the unit first turn the power OFF at the repaired outdoor unit then remove the short circuit at the AP pin CN102 Then fully open all valves on the 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 4 Backup Operation and perform backup opera t...

Page 65: ...ill be attached then recover the refrigerant from the tubing Be sure that no air enters the tubing at this time When the hose is connected internal pressure is applied by the remaining refriger ant in the inter unit tubing The connection port employs a Schrader type valve To determine when refrigerant recovery is compete follow the instructions in the instruction manual of the refrigerant recovery...

Page 66: ... the outdoor unit 1 Refer to 5 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 21 3 For the next steps refer to 6 17 in A o...

Page 67: ...bolts and remove the washers and rubber washers quantities indicated in the figure below 6 Disconnect the tube with flare nut using two adjustable 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 compressor Tighten the flare nut with a seal bonnet 1 4 in it If oil remaining in the compresso...

Page 68: ...ow pressure outlet ports at the outdoor unit where the compres sor was replaced Connect the manifold gauge to a nitrogen cylinder and perform nitrogen gas replacement 10 Perform copper brazing at the 2 brazing locations 11 Follow the instructions in 6 Checking for Leakage After Repair and check for leaks at the outdoor unit where the compressor was replaced At this time also check for leaks at the...

Page 69: ...shers and spacers 1 each at the 3 locations shown in the figure The compressor rear leg is not anchored 6 Prepare to disconnect the 3 brazed locations shown in the figure 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 ...

Page 70: ...r tube connector parts along with the O ring from the removed compressor and mount them on the replaced new compressor 4 Install the crankcase heater onto the new compressor 5 Temporary mount 2 cushion rubbers with bolts at the position as shown in the figure 27 Set up the leg of the the new compressor onto the 2 cushion rubbers Fig 26 Oil equalizer tube connector parts O ring Hexagonal cap Fixing...

Page 71: ...shown in the figure 28 An O ring is mounted inside the oil equalizer tube connector parts It must be pro tected and do not lose it 11 Follow the instructions in 6 Checking for Leakage After Repair and check for leaks at the outdoor unit where the compressor was replaced 12 Re install all components that were removed Re install the electrical component box in the same position as it was before Be s...

Page 72: ...rankcase heater 5 Remove the bolts washers and rubber washers 1 each at 3 locations The compressor right inner leg is not anchored 6 Prepare to disconnect the 3 brazed locations shown in the figure 29 Protect the sensors and the plates rubber lead wires clamps and other items located around the sensors Pay particular attention to protection of the check valve shown in the figure and to removal of ...

Page 73: ...al caps hold the fixing nut at the main unit side so as not to loose it with a wrench or spanner And then loosen and remove the hexagonal cap 4 Remove the oil equalizer tube connector parts along with the O ring from the removed compressor and mount them on the replaced new compressor CAUTION Fig 31 Hexagonal cap Fixing nut at the main unit side O ring Oil equalizer tube connector Fig 30 Sensor Ru...

Page 74: ...where the compressor was replaced Connect the manifold gauge to a nitrogen cylinder and perform nitrogen gas replace ment 13 Perform copper brazing at the 4 brazing locations In the same way as during removal pay particular attention to protection of the check valve shown in the figure An O ring is mounted inside the oil equalizer tube connector parts It must be protected and do not lose it CAUTIO...

Page 75: ...Follow the instructions in 7 Evacuating System and apply vacuum to the outdoor unit where the compres sor was replaced D Replacing multiple compressors Removal 1 Follow the instructions in A Replacing the inverter compressor B Replacing constant speed compressor 1 and C Replacing constant speed compressor 2 and remove the compressors There is no predetermined sequence for removal any compressor ma...

Page 76: ... BLK WHT from terminals CN009 and CN024 on the outdoor unit control PCB of the outdoor unit where the high low pressure sensor will be removed 3 Use 2 adjustable wrenches in combination to remove the high low pressure sensors When removing the high low pressure sensors internal pressure will be applied by the refrigerant in the outdoor unit The high low pressure sensor connection ports on the outd...

Page 77: ...low pressure outlet ports at the outdoor unit where the 4 way valve will be replaced Connect the manifold gauge to a nitrogen cylinder and perform nitrogen gas replace ment 4 Prepare the brazing kit to disconnect the brazed parts 4 locations Protect the check valves as shown in the figure 35 5 After replacing the 4 way valve follow the instructions in 6 Checking for Leakage After Repair and 7 Evac...

Page 78: ...or unit where the 4 way valve will be replaced Connect the manifold gauge to a nitrogen cylinder and perform nitrogen gas replace ment 3 Prepare the brazing kit to disconnect the brazed parts 4 locations Protect the check valves as shown in the figure 36 4 After replacing the 4 way valve follow the instructions in 10 Compressor and reinstall the removed con stant speed compressor 2 in the outdoor ...

Page 79: ...NCE REMOTE CONTROLLER 1 Overview 3 2 2 Functions 3 3 3 Ordinary Display Controls and Functions 3 4 4 Monitoring Operations 3 9 5 Outdoor Unit Alarm History Monitor 3 11 6 Mode Settings 3 12 W 2WAY ECO i SYSTEM Eng3 indd 1 W 2WAY ECO i SYSTEM Eng3 indd 1 2008 09 02 17 40 02 2008 09 02 17 40 02 ...

Page 80: ...perating 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 un...

Page 81: ...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 Temperature monitor Displays the indoor outdoor unit ...

Page 82: ...ed 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 ...

Page 83: ...he 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...

Page 84: ...999999 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...

Page 85: ... system address on main bus line 1 30 YY Outdoor unit sub bus address 1 8 1 appears when there is only 1 outdoor unit LED 1 2 3 Locations where and are displayed as shown in Fig 3 01 No of connected indoor units 4 units connected Sample displays 02 Unit Nos 1 2 3 and 4 are connected Fig 3 Fig 4 Fig 5 W 2WAY ECO i SYSTEM Eng3 indd 7 W 2WAY ECO i SYSTEM Eng3 indd 7 2008 09 02 17 40 07 2008 09 02 17 ...

Page 86: ...on 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 th...

Page 87: ...ay 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 dis...

Page 88: ...exchanger gas 2 C Heat exchanger liquid 2 C Outdoor air temp C Not used Inverter primary current A CT2 A Outdoor unit MOV1 pulse STEP MOV2 pulse STEP Discharge temp 3 C CT3 A MOV3 pulse 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 da...

Page 89: ...on 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 ...

Page 90: ...hen 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 perfor...

Page 91: ...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 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 d...

Page 92: ... MEMO 3 14 W 2WAY ECO i SYSTEM Eng3 indd 14 W 2WAY ECO i SYSTEM Eng3 indd 14 2008 09 02 17 40 16 2008 09 02 17 40 16 ...

Page 93: ...ons 4 1 4 REMOTE CONTROLLER FUNCTIONS 1 Simple Settings Function 4 2 2 Detailed Settings Function 4 4 3 Remote Controller Servicing Functions 4 16 W 2WAY ECO i SYSTEM Eng indb 1 W 2WAY ECO i SYSTEM Eng indb 1 2008 09 01 18 22 52 2008 09 01 18 22 52 ...

Page 94: ...er LCD display Fig 1 At this time the indoor unit fan or all indoor unit fans in the case of group control begins operating If group control is in effect press the button and select the address unit 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 95: ...D 0005 MED MED 0006 LO MED Heating intake temperature shift 0000 No shift 0001 Shifts intake temperature 1 C down 0002 Shifts intake temperature 2 C down 0003 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 hea...

Page 96: ...code and settings data are displayed blinking on the remote controller LCD display Fig 2 At this time the indoor unit fan or all indoor unit fans in the case of group control begins operating If 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...

Page 97: ...set Indoor unit address 0001 Unit No 1 0002 Unit No 2 0003 Unit No 3 0064 Unit No 64 0099 Not set Group control address 0000 Individual 1 1 Indoor unit with no group wiring 0001 Main unit One of the group control indoor units 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 temper...

Page 98: ...r limit at shipment Upper limit Drying 0018 18 C Lower limit at shipment 0019 19 C Lower limit 0029 29 C 0030 30 C Upper limit at shipment Upper limit Auto heat cool 0017 17 C Lower limit at 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 diffe...

Page 99: ...13 C 0014 Control temperature 14 C 0025 Control temperature 25 C 0026 Control temperature 26 C Fan output switching 0000 Output linked with fan ON when indoor unit 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 Humidifi...

Page 100: ...or low static pressure filter Antibacterial high performance filter 90 Antibacterial high performance filter 65 Air cleaning unit air cleaning unit optical regenerative deodorizing filter deodorant activated charcoal filter For air blocking material For 3 way discharge when discharge duct is connected 0006 For air blocking material For 2 way discharge Humidifier ON time ON time per 60 seconds 0000...

Page 101: ... X XM 2500 1250 5000 2500 2500 1250 0002 2 Way Air Discharge Semi Concealed S 2500 1250 10000 5000 2500 1250 2500 1250 0003 1 Way Air Discharge Semi Concealed Slim L 2500 1250 0005 Concealed Duct U US 1250 5000 2500 2500 1250 5000 2500 0006 Concealed Duct High Static Pressure D 1250 2500 1250 5000 2500 0007 Ceiling Mounted T 2500 1250 2500 1250 0008 Wall Mounted K 150 75 0010 Floor Standing F 150 ...

Page 102: ...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 will not be possible When the priority remote con...

Page 103: ... 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 when heater thermostat is OFF Normally humidifyin...

Page 104: ...time Use this setting to change the time for forced operation at installation or servicing from 5 minutes to 4 minutes Enabled only with PAC i models 1C Cooling discharge temperature shift Shifts the set value for models which perform discharge temperature control Discharge temperature control models Floor discharge wall built in direct expansion coil outdoor air treatment high fresh 1d Heating di...

Page 105: ...ire 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 ...

Page 106: ...de 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 ...

Page 107: ... discharge duct is connected INS DS140A 6 Air blocking material for 2 direction discharge INS DS140A Setting No 1 Go to 2 Setting No 3 Go to 3 Setting No 6 Go to 4 2 Setting No 1 Open the cover of the electrical component box and connect the supplied short circuit connector 2P YEL to short circuit pin TP1 2P RED on the indoor unit control PCB 3 Setting No 3 Open the cover of the electrical compone...

Page 108: ...er 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...

Page 109: ...hermostat forced ON Procedure Press and hold the button for 4 seconds or longer Test appears on the remote controller LCD display Fig 3 Start operation Press the button to return to normal remote controller display Fig 3 2 3 1 4 RCS TM80BG W 2WAY ECO i SYSTEM Eng indb 17 W 2WAY ECO i SYSTEM Eng indb 17 2008 09 01 18 23 02 2008 09 01 18 23 02 ...

Page 110: ...of 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 show...

Page 111: ...ger 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 se...

Page 112: ... MEMO 4 20 W 2WAY ECO i SYSTEM Eng indb 20 W 2WAY ECO i SYSTEM Eng indb 20 2008 09 01 18 23 03 2008 09 01 18 23 03 ...

Page 113: ...Outdoor Unit Control Panel LED Display 5 4 3 Remote Controller Servicing Functions 5 5 4 W 2WAY ECO i Alarm Codes 5 7 5 Blinking Inspection Display on the Remote Controller 5 27 6 Inspection of Parts 5 28 7 Test Pin 5 29 W 2WAY ECO i SYSTEM Eng5 indd 1 W 2WAY ECO i SYSTEM Eng5 indd 1 2008 09 02 17 46 32 2008 09 02 17 46 32 ...

Page 114: ...ication error of group control wiring Error of main indoor unit in receiving serial communication signal from sub indoor units E18 During auto address setting number of connected units does not correspond to number set Number of connected indoor units is less than the number set E15 Number of connected indoor units is more than the number set E16 No indoor unit is connected during auto address set...

Page 115: ... speed discharge temp trouble P18 Outdoor unit fan trouble P22 DCCT ACCT over current 80 Hz or more P26 INV compressor start failure Missing phase or lock alarm P29 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 Compressor 2 constant speed H11 Compressor 3 con...

Page 116: ... 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 disp...

Page 117: ...ure 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 The...

Page 118: ...oor 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 ex...

Page 119: ...essor intake temperature sensor trouble 5 14 F16 High pressure sensor trouble 5 15 F17 Low pressure sensor trouble 5 16 F23 Gas temperature sensor trouble at outdoor heat exchanger 2 In 5 13 F24 Liquid temperature sensor trouble at outdoor heat exchanger 2 Out 5 13 F25 Gas temperature sensor trouble at outdoor heat exchanger 3 5 13 F26 Liquid temperature sensor trouble at outdoor heat exchanger 3 ...

Page 120: ... 24 P17 Compressor 2 discharge temperature trouble 5 23 P18 Compressor 3 discharge temperature trouble 5 23 P22 Fan motor trouble 5 25 P26 Inverter compressor high frequency overcurrent alarm 5 25 P29 Inverter compressor missing phase or lock alarm 5 26 Blinking Inspection Display on the remote controller CHECK blinking 1 5 26 CHECK blinking 2 5 27 W 2WAY ECO i SYSTEM Eng5 indd 8 W 2WAY ECO i SYST...

Page 121: ...tting was in progress at another outdoor unit in the same link Probable cause Automatic address setting is in progress at another outdoor unit Check This alarm is not displayed on the remote controller Therefore check the blinking on the outdoor unit PCB Correction Wait for automatic address setting to be completed at the outdoor unit where it is currently in progress Then start automatic address ...

Page 122: ...no indoor units were recognized Probable cause 1 The inter unit control wiring from the outdoor unit to the indoor units has been cut 2 Serial connector 1 CN001 is disconnected at the outdoor unit 3 The power is OFF at all indoor units in the system Check 1 Check whether the inter unit control wiring from the outdoor unit to the indoor units is cut 2 Check whether serial connector 1 CN001 is disco...

Page 123: ...ntity setting again 2 Check the outdoor unit main sub control wiring Correction 1 Correct the incorrect outdoor unit quantity setting 2 Repair the outdoor unit main sub control wiring Example Notes 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 E29 Alarm m...

Page 124: ...tes suddenly and wildly In some cases the precise temperature may not be known even when monitoring software is used Check Wiggle the sensor and check whether the trouble continues Check whether the 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 determin...

Page 125: ... this alarm is to facilitate identification of the problem in this case F06 F23 F25 Alarm Alarm code F06 F23 F25 Alarm meaning Gas temperature sensor trouble at outdoor heat exchanger 1 Gas temperature sensor trouble at outdoor heat exchanger 2 Gas temperature sensor trouble at outdoor heat exchanger 3 Alarm conditions 1 A D step is 10 steps or less short circuit 2 A D step is 1014 steps or more o...

Page 126: ...the temperature that is recognized by the microcomputer Correction Example Notes F12 Alarm Alarm code F12 Alarm meaning Compressor intake temperature sensor trouble Alarm conditions 1 A D step is 10 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 ...

Page 127: ...check 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 ...

Page 128: ...se to 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 t...

Page 129: ...phase 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 pha...

Page 130: ...ne whether the trouble is a PCB failure or CT failure H15 H25 Alarm Alarm code 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 whe...

Page 131: ... smaller 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 ref...

Page 132: ...l foaming may increase oil discharge The same occurs when the refrigerant proportion in the compressor is high at start due to an open circuit in the crank case heater 7 Oil sensor disconnected or open circuit Check 1 Check the tubing length and height differences 2 Check the operation of system circuit valves 3 Check that there is not an excessive amount of liquid return Check that there is no me...

Page 133: ...nd ground HIC If there is a short circuit there is an HIC malfunction Correction If an HIC failure is found replace the PCB Example Notes Turn OFF the power and check the continuity of HIC and HIC on the HIC PCB L04 Alarm Alarm code L04 Alarm meaning Outdoor system address duplication Alarm conditions Communication by inter unit control wiring was received that contained the same address as that u...

Page 134: ...s correct however the refrigerant type setting in the outdoor unit EEPROM item code 80 is incorrect Check 1 Check the refrigerant type at the connected unit 2 Use the outdoor unit maintenance remote controller and check the item code 80 refrigerant type If the setting is incorrect change it to R410A Correction Example Notes The outdoor unit maintenance remote controller is required in order to set...

Page 135: ...arge 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 refrigeran...

Page 136: ...ndoor unit The system operates normally unless the temperature around the indoor unit is excessively high 8 During heating check for indoor fan failure 9 Check whether the refrigerant circuit is clogged Check that all service valves are closed Check whether welded locations are clogged 10 Check for mechanical valve failure Check whether the mechanical valves make a clattering sound when the power ...

Page 137: ...eck the continuity of and on the fan circuit PCB P26 Alarm Alarm code P26 Alarm meaning Inverter compressor high frequency overcurrent alarm Alarm conditions This alarm occurs when current trouble or current detection trouble occurs at an inverter frequency of 80 Hz or higher after start when trouble judgment current is detected in the primary or secondary current or when an instantaneous secondar...

Page 138: ...isplay also occurs when seizing of the compressor magnet SW is detected Because this may also be the case refer to Blinking inspection display compressor magnet SW seizing detection Alarm conditions When alarm P16 P22 P26 P29 Hx1 Hx2 or H31 has occurred correcting the control device remote controller etc input engages this mode Probable cause Because alarm P16 P22 P26 P29 Hx1 Hx2 or H31 has occurr...

Page 139: ...agnet 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 ...

Page 140: ...layed is approximately 4 V then the voltage is normal When the voltage is normal measure the resistance between each pair of pins on the electronic control valve connector The connector is normal if all results pin 5 pin 1 pin 5 pin 3 pin 6 pin 2 pin 6 pin 4 are approximately 46Ω If the results are 0Ω or replace the coil MOV3 Measure the voltage between plug pin 5 and pins 1 through 4 at the CN229...

Page 141: ...ve 2 SCV2 12 Relay RY023 Pressure balance valve 2 PBV2 3 Relay RY021 Discharge valve 2 DCV2 13 Relay RY003 Crank case 2 CH2 4 Relay RY020 Discharge valve 1 DCV1 14 Relay RY002 Crank case 1 CH1 5 Relay RY005 Bypass valve BPV 15 Relay RY019 Supercooling valve 3 SCV3 6 Relay RY007 Recovery valve ORVR 16 Relay RY026 Discharge valve 3 DCV3 7 Relay RY006 Balance valve BALV 17 Relay RY027 Pressure balanc...

Page 142: ... MEMO 5 30 W 2WAY ECO i SYSTEM Eng5 indd 30 W 2WAY ECO i SYSTEM Eng5 indd 30 2008 09 02 17 46 48 2008 09 02 17 46 48 ...

Page 143: ...GB ES FR DE IT PT GR SANYO Electric Co Ltd Printed in Japan 200809B B DC W 2WAY ECO i SYSTEM Eng indb 1 W 2WAY ECO i SYSTEM Eng indb 1 2008 09 01 18 23 20 2008 09 01 18 23 20 ...

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Sanyo 2-WAY ECO-i SPW-2-WAY ECO-i UR124SXH56B, Service Manual

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