Panasonic U-4LE1E5 Service Manual Download Page 60

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SM830195-01̲Mini VRF SYS.indb 14

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Summary of Contents for U-4LE1E5

Page 1: ...MT1E5 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 S 22MR1E5 S 28MR1E5 S 36MR1E5 S 45MR1E5 S 56MR1E5 S 71MR1E5 P1 Floor Standing S 22MP1E5 S 28MP1E5 S 36MP1E5 S 45MP1E5 S 56MP1E5 S 71MP1E5 Y1 4 Way Cassette 60 60 S 22MY1E5 S 28MY1E5 S 36MY1E5 S 45MY1E5 S 56MY1E5 M1 Slim Low Static Ducted S 22MM1E5...

Page 2: ...ard or unsafe practice which can result in personal injury or product or property damage If Necessary Get Help These instructions are all you need for most installation sites and maintenance conditions If you require help for a special problem contact our sales service outlet or your certified dealer for additional instructions In Case of Improper Installation The manufacturer shall in no way be r...

Page 3: ...zed dealer or specialist for cleaning In case of malfunction of this appliance do not repair by yourself Contact to the sales dealer or service dealer for a repair CAUTION Do not touch the air inlet or the sharp aluminum fins of the outdoor unit You may get injured Ventilate any enclosed areas when installing or testing the refrigeration system Escaped refrigerant gas on contact with fire or heat ...

Page 4: ... increase in the number of high density buildings however the installation of multi air conditioner systems is on the increase because of the need for effective use of floor space individual control energy conservation by curtailing heat and carrying power etc Most importantly the multi air conditioner system is able to replenish a large amount of refrigerant compared to conventional individual ai...

Page 5: ...ing Oil in Compressor 2 4 3 Recovering Refrigerant 2 5 4 Checking for Leakage After Repair 2 10 5 Evacuating System 2 11 6 Pumping Out Refrigerant from Outdoor Unit 2 12 7 Compressor 2 14 8 High Pressure Sensor 2 17 Section 5 TROUBLE DIAGNOSIS 5 1 Section 4 REMOTE CONTROLLER FUNCTIONS 4 1 1 Simple Settings Function 4 2 2 Detailed Settings Function 4 7 3 Remote Controller Servicing Functions 4 17 S...

Page 6: ...v ...

Page 7: ...utdoor Unit Electronic Control Valve Motor Valve control MOV1 1 11 7 Outdoor Fan Control 1 12 8 Indoor Unit Electronic Control Valve Motor Valve Control 1 13 9 Indoor Special Control 1 14 10 Discharge Gas Temperature 1 18 11 Current Protection 1 18 12 Pressure Sensor Failure 1 19 13 4 Way Valve Failure L18 1 19 14 Servicing and Maintenance Functions 1 20 15 Demand Control 1 21 Contents ...

Page 8: ...indoor units can be set however the maximum number of units which can be connected is shown below for each outdoor unit capacity Be sure to connect indoor units so that the resulting indoor outdoor capacity ratio total capacity of all indoor units compared with the outdoor unit capacity is within the range of 50 130 Setting item At shipment from factory Settable range System address 1 System 1 30 ...

Page 9: ... A AB B and C may vary depending on the relationships among factors including the difference between the room temperature setting and the indoor unit air intake temperature air intake temperature difference and the difference between the air discharge temperature setting and the air discharge temperature air discharge temperature difference Definitions of the evaporation temperature and condensati...

Page 10: ...tc For this reason vapor may be discharged if the test run continues for a long period of time however this does not indicate a problem In addition the test run is canceled automatically after 1 hour Even within the same area the compressor capacity varies depending on the refrigerant temperature For 6 minutes after the compressors start area C is considered to be area B for control purposes Durin...

Page 11: ...he refrigerant temperature If the condensation temperature Tc enters area D and the thermostat turns OFF the next time the compres sor starts it may restart from a lower capacity When the area changes to area C area C is considered to be area B for control purposes for the first 6 min utes even if the horsepower is the minimum value within the range where capacity control is possible opera tion wi...

Page 12: ... 0 19 0 20 0 19 0 22 0 5 hp 23 0 25 0 22 0 23 0 22 0 25 0 6 hp 24 0 28 0 23 0 24 0 23 0 28 0 Stop 1 Down 2 Not up 3 Followed by normal control 4 hp 21 0 23 0 20 0 21 0 20 0 23 0 5 hp 24 5 26 5 23 5 24 5 23 5 26 5 6 hp 28 0 30 0 27 0 28 0 27 0 30 0 hp horse power hp horse power hp horse power unit Amp 3 phase Model Stop 1 Down 2 Not up 3 Followed by normal control 4 hp 8 5 10 5 7 5 8 5 7 5 10 5 5 h...

Page 13: ... be started when in a high temperature state a starting pattern will be changed according to the discharge temperature 1 1 1 Discharge temperature less than 30 C 1 2 Discharge temperature over 30 C 1 2 3 4 Td Discharge temperature HPT High pressure saturated temperature K Difference in temperature 1K 1 C Elec cont valve Electronic control valve Control in the Cooling Mode Control hour Outdoor unit...

Page 14: ...ystem 480pulse Min 2 minutes 30 seconds to Max 23 minutes Discharge degree of overheating Td 1 HPT 2 12 K 3 Control hour Outdoor unit Compressor Elec cont valve 4 Frequency 22Hz A certain pulse calculated by the outdoor air temperature and total load of indoor unit Indoor unit Fan Elec cont valve 4 Preset wind speed or fixture setting to Stop by indoor unit control system 80pulse Min 1 minute to M...

Page 15: ...es Simplified flow of inter systems refrigerant oil recovery control Inter systems refrigerant oil recovery control follows this flow process 3 4 Reverse cycle Defrost Control 3 4 1 Defrost control method Defrost with this system is done by reverse cycle defrost 3 4 2 Conditions for start of defrost Defrost control is started when the frost detection conditions are met and the defrost mask time ha...

Page 16: ... reason then defrost control may start again after a minimum of 10 minutes 3 4 5 General flow of reverse cycle defrost General flow of reverse cycle defrost control Reverse cycle defrost control follows this flow process 3 4 6 Defrost end judgment conditions Defrost ends when the below defrost end conditions are met Condition 1 Condition 2 Defrost end judgment occurs when the temperature at the te...

Page 17: ...s Remarks Condenser 480 Maximum flow control Cooling operation Indoor Unit Stop 480 Evaporator 65 Less than 480 SH super heat control Heating operation Stop 0 Operation of the electronic control valve during normal unit operation 6 Outdoor Unit Electronic Control Valve Motor Valve Control MOV1 6 1 Power Initialization The valve position is 480 pulses if the indoor unit has not started once after t...

Page 18: ...nstructions When Quiet mode is activated the maximum fan mode is reduced compared to maximum fan mode during normal operation Because the high pressure may increase operation occurs at the maximum fan mode Outdoor unit 4 hp 1 13 14 5 6 hp 14 14 Min fan mode Max fan mode Cooling operation Heating operation Outdoor air temp 36 C 3 Outdoor air temp 36 C 1 These outdoor units utilize a DC fan motor th...

Page 19: ... 85 pulses 85 pulses 85 pulses The target value for SC control is 5 20 C for the temperature difference between the pressure sensor temperature and E1 depending on the operating conditions INDOOR UNIT 8 1 During Normal Control During Cooling mode operation Outdoor unit operating Outdoor unit stopped The target value for SH control is 2 6 C for the temperature difference between E3 and E1 depending...

Page 20: ...ontrol valve opens from its current position by approximately 20 pulses Control type Operating mode Target indoor units Electronic control valve position pulses Cooling All indoor units All indoor units All indoor units Thermostat ON Thermostat OFF Fixed pulses for cooling corresponding to the indoor unit capacity 480 Fixed pulses corresponding to the indoor unit capacity Fixed pulses correspondin...

Page 21: ...hen thermostat ON Fan speed is LL when thermostat OFF Fan speed set by remote controller DTi Intake temperature of indoor unit Preset temperature in remote controller 9 3 2 Heating mode Indoor unit fan operated in the heating mode is stopped from CCU at the following condition Discharge air temperature of indoor unit 20 C XX High pressure sensor temperature HPS in outdoor unit 25 C XX Liquid tempe...

Page 22: ...es F1 M1 E1 Operating time mentioned XX above is able to set in EEPROM of the main outdoor unit EEPROM setting in main outdoor unit CODE 2B Setting No XX 20 30 40 50 60 20 minutes 30 minutes factory preset mode 40 minutes 50 minutes 60 minutes The drain pump always operates when the indoor unit is thermostat ON in cooling operation Once the drain pump operates it keeps operating for 20 minutes In ...

Page 23: ...ble to set in EEPROM of the main outdoor unit EEPROM setting in main outdoor unit CODE E1 In heating operation this function virtually does not work because preset discharge air temperature is 50 C 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 Outdoor unit EEPRO...

Page 24: ...alue in parentheses 60 minutes after the compressor stopped an alarm occurs If the discharge gas temperature remains at or above sensor failure temperature 101 C for 20 minutes after the system is stopped an alarm occurs In this case in addition to sensor failure compressor overheating caused by insufficient refrigerant is also a possibility 11 Current Protection 11 1 Fan Motor Compressor model Co...

Page 25: ...ure sensor 13 4 Way Valve Failure L18 When a 4 way valve coil failure coil disconnection or similar failure occurs a judgment is made automatically from the operating conditions and an alarm is output Alarm Description P16 Occurs when overcurrent 32 5 A is detected during normal operation P29 Occurs when a missing phase or overcurrent 48 A is detected when the inverter compressor starts H31 Occurs...

Page 26: ...g systems were stopped due to a power outage or other cause Noise reduction mode is engaged constantly when this pin is short circuited To operate in noise reduction mode only at night or for similar control at other times use an external timer field supply This setting controls the operation of the drain pump EEPROM setting Max fan mode Capacity ratio Effect Normal operation setting at time of fa...

Page 27: ...OM Outdoor Unit EEPROM Setting The display mark for demand function is selectable by changing 1E as shown below 1A 100 at shipment 1B 70 at shipment It is also possible to make setting that the display symbol of demand activated is concealed as shown in the following table Input present Input not present EEPROM Setting 0 1 2 No mark is displayed even in demand activated mode When demand input is O...

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Page 29: ...iagram Sensors and solenoid valves 2 2 1 Removing Panels 2 3 2 Discharging Oil in Compressor 2 4 3 Recovering Refrigerant 2 5 4 Checking for Leakage After Repair 2 10 5 Evacuating System 2 11 6 Pumping Out Refrigerant from Outdoor Unit 2 12 7 Compressor 2 14 8 High Pressure Sensor 2 17 Contents ...

Page 30: ...ni VRF SYSTEM Outdoor Unit Repair Procedures Layout Diagram Sensors and solenoid valves TS suction thermistor MOV electronic motor operated valve 20S 4 way valve C1 condenser 1 thermistor Front side Front side ...

Page 31: ...F SYSTEM Outdoor Unit Repair Procedures 1 Removing Panels Front panel Cover A Remove the front panel remove 3 screws 1 Front panel removal Fig 2 1 2 Cover A removal Fig 2 1 Remove the cover A remove 1 screw Fig 2 1 ...

Page 32: ...herefore 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 Condition of oil Odor Color Judgment criteria for changing oil Hue Total acid value 0 02 or less 3 5 or less 4 0 or over 0 06 or over Smells some what not as strong as below Pungent burnt odor Brownish Brownish blackish Motor burnout Abnorma...

Page 33: ...e valves 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 By short circuiting the AP pins each electronic expansion valve in the outdoor unit is forcibly opened as soon as power comes on which releases all remaining refrigerant into the reco...

Page 34: ... recovered by refrigerant recovery unit 3 2 3 Refrigerant recovery procedures 2 Turn off all equipment in system Other indoor units can operate normally Replace or repair faulty unit Check for leakage in repaired unit Evacuate air from repaired unit Open ball valve Ready for normal operation END END Ready for normal operation Open the ball valve Evacuate air in repaired unit Check for leakage in r...

Page 35: ...ery procedures A using ball valve near the indoor unit Fig 2 3 If a ball valve with a service port has been provided near the indoor unit as shown in Fig 2 3 follow the instructions given in 2 through 6 below If the service port is instead located in the outdoor side follow the instructions in 3 2 3 Refrigerant recovery procedures B After running the unit in Cooling mode for about 5 minutes fully ...

Page 36: ...Outdoor Unit Repair Procedures Refrigerant recovery unit Manifold gauge Lo Hi Refrigerant recovery cylinder Ball valve field supply Gas tube Outdoor unit Indoor unit Liquid tube Service port Fig 2 4 3 Recovering Refrigerant ...

Page 37: ...ull it directly by its wires When any other connector except the EXL2 is disconnected the outdoor unit will not stop Be sure to pull out only the EXL2 connector as described Turn off power to all equipment in the system Then pull out the RC1 connector 4P BLU CN006 on the outdoor control PCB in the outdoor unit for which pump down has been completed Turn on power for all equipment in the system and...

Page 38: ...ewly welded 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 in nitrogen gas to obtain a system pressure of 3 80 MPa Then measure both the outdoor ambient temperature and the pressure in the system Leave the system in thi...

Page 39: ...utdoor control PCB and turn on power to the repaired outdoor unit By short circuiting the AP pins and turning on power to the outdoor unit all electronic expansion 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 ne...

Page 40: ...sed If the unit is in Cooling mode temporarily release the short circuit across the test run pins on the outdoor control PCB of the unit Then short circuit the STOP pin CN STOP to stop operation of the unit Short circuit the MODE pin CN MODE on the outdoor control PCB of the main unit The 4 way valve will not change at this moment rather it changes just before start of operation It is difficult to...

Page 41: ...gerant from Outdoor Unit To determine the completion of refrigerant recovery follow the instructions that came with the refrigerant recovery unit NOTE Manifold gauge Lo Hi Connect from here to refrigerant recovery unit Fig 2 8 Low pressure outlet port For ø7 94 mm connector ...

Page 42: ... and replace compressor in the failed unit Fully close the high and low pressure gauge valves on the manifold gauge then stop the vacuum pump Disconnect the manifold gauge from the vacuum pump Connect the manifold gauge to the refrigerant cylinder At this time be careful that air does not enter the refrigerant tubing Do not use the recovered refrigerant Use a refrigerant cylinder that contains new...

Page 43: ...When connecting the hose internal pressure will be applied from the remaining refrigerant in the inter unit tubing To determine when refrigerant recovery has been completed follow the instructions that came with the refrigerant recovery device As shown in Fig 2 9 disconnect the tube that runs from the liquid tube valve to the ball valve on the outdoor unit where dry cores will be attached Then att...

Page 44: ...n replacement Follow the procedure for removing panels and remove the front panel the right lower panel and the electrical component box cover Fig 2 10 Follow the refrigerant work procedure and recover the refrigerant Remove the acoustic material that surrounds the compressor 3 layers Remove the cap from the compressor terminal plate Disconnect the power terminal and internal terminal Remove the c...

Page 45: ...ve the rubber stopper and tube cap welded from the new compressor Install the crankcase heater onto the compressor Place the cushioning rubber in the designated positions on the compressor There are 3 pieces for an inverter compressor Set the new compressor into the unit Shape the tubes and insert them at the 2 welding locations Use nitrogen to replace the air inside the compressor Perform brazing...

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Page 47: ...ance Remote Controller 3 OUTDOOR UNIT MAINTENANCE 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 Contents ...

Page 48: ...unit connection status number of units operating mode etc NOTE Outdoor unit maintenance remote controller does not function as an ordinary remote controller It is therefore only used for test runs and during servicing The special service checker wiring is required in order to connect the outdoor unit maintenance remote controller to the outdoor unit PCB Ordinary remote controllers or other control...

Page 49: ...ed 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 sensor tempera...

Page 50: ... connected 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...

Page 51: ...tion The MODE button can be used to change between heating and cooling operation The display indicates the operating mode of the indoor unit with the lowest unit No All units test run Fig 3 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 th...

Page 52: ...egment display Thermostat ON status of indoor unit 7 segment display Operating status of outdoor unit compressor 7 segment display Compressor 1 operating time 0 99999999 hrs Outdoor unit power ON time 0 99999999 hrs Compressor 1 operation count 0 65535 times Alarm history 1 most recent Alarm history 2 Alarm history 3 Alarm history 4 Alarm history 5 Alarm history 6 Alarm history 7 Alarm history 8 o...

Page 53: ...ss which is currently selected XX Outdoor system address on main bus line 1 30 YY Outdoor unit sub bus address 1 appears when there is only 1 outdoor unit 01 No of connected indoor units 4 units connected Sample displays 02 Unit Nos 1 2 3 and 4 are connected Fig 3 3 Fig 3 4 Fig 3 5 3 Ordinary Display Controls and Functions ...

Page 54: ...P button The total compressor operating time is displayed in 1 hour units using 8 digits When the first 4 digits are displayed the bottom dot of the colon is 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 NOT...

Page 55: ...g is illuminates The display 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...

Page 56: ...C Indoor unit heat exchanger temp E1 C Not used C Indoor unit heat exchanger temp E3 Indoor unit C C Discharge air temp Discharge air temp setting Indoor unit MOV position STEP C C C C Discharge temp TD High pressure sensor temp Suction temp TS Heat exchanger liquid temp C1 C Outdoor air temp TO Outdoor unit Not used Inverter primary current A MOV position Actual operating frequency Hz ...

Page 57: ... No display shows the outdoor unit address 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 address Item codes 01 08 ar...

Page 58: ...d the bottom dot of the colon is illuminated To exit the setting mode press the CHECK button 1 2 3 5 5 3 1 2 A and B are displayed alternately Example shows display of 0000 0001 A Display of first 4 digits B Display of last 4 digits Description Parameter DN Outdoor unit fan Quiet mode 0 Disabled 1 Quiet mode Energy saving mode 0 None 1 Discharge temp control only Mode 3 2 Demand only Mode 2 3 Disc...

Page 59: ... set outdoor unit address System XX YY System XX System address YY Address at outdoor unit sub bus item code number DN value in the table below and the setting data 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 bottom dot of the colon is lit To exit setting mode press the...

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Page 61: ...4 1 Mini VRF SYSTEM Remote Controller Functions 4 4 REMOTE CONTROLLER FUNCTIONS 1 Simple Settings Function 4 2 2 Detailed Settings Function 4 7 3 Remote Controller Servicing Functions 4 17 Contents ...

Page 62: ...ata are displayed blinking on the remote controller LCD display Fig 4 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 in...

Page 63: ... Compressor OFF 0000 Lo 1 min LL 3 min LL 0001 Lo LL 0002 LL LL 0004 Lo 1 min LL 3 min Lo 0005 Lo Lo 0006 LL Lo 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 E...

Page 64: ...tch 0001 4 Way cassette U1 Y1 2500 1250 5000 2500 2500 1250 0002 2 Way cassette L1 2500 1250 10000 5000 2500 1250 2500 1250 0003 1 Way cassette D1 2500 1250 0005 Low Silhouette Ducted F1 Slim Low Static Ducted M1 1250 5000 2500 2500 1250 5000 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 ...

Page 65: ... mode from a specific remote controller When there are multiple remote controllers in the same refrigerant system it is possible to set one remote controller as the priority remote controller the remote controller which is given priority for selecting the operating mode If 2 or more remote controllers are set as priority remote controllers an alarm will occur at the remote controllers and operatio...

Page 66: ...Heating intake temperature shift Shifts the intake temperature during heating Can be set when the body thermostat is used 07 Electric heater installation Set when cost distribution is performed using an AMY central control system or similar system and when an optional electric heater is installed This is unrelated to control of the electric heater 08 Humidifying when heater thermostat is OFF Norma...

Page 67: ...ger unit No or in the case of group control item code and settings data are displayed blinking on the remote controller LCD display Fig 4 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 operat...

Page 68: ...ition 1 and stay Without separate setting Swing Move to position 2 and stay Move to position 3 and stay Move to position 4 and stay Move to position 5 and stay 2 3 4 5 Fig 4 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...

Page 69: ... Unit No 30 0099 Not 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...

Page 70: ...per limit at shipment 0030 30 C Upper limit at shipment Upper limit Drying 0018 18 C Lower limit at shipment 0019 19 C Lower limit 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 0000 Normal 0001 Ignore heat exchanger temperature conditions 0000 Incapable of auto restart setting 0001 Capable of auto restart setting at f...

Page 71: ...3 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 Humidifie...

Page 72: ...ec 0002 2 sec 0058 58 sec 0059 59 sec 0060 Continuously ON Repeat timer switching 0000 Function disabled 0001 Function enabled Timer function change prohibit 0000 Function disabled 0001 Function enabled Smudging control 0000 No smudging control Setting the Flap Separately Only for 4 way Cassette type 0000 0001 0002 0003 0004 0005 0006 Setting the Flap Separately Only for 4 way Cassette type Settin...

Page 73: ... thermostat is used Increase this value when it is difficult to turn the thermostat ON 18 Automatic stop time after operation start The time at which an indoor unit is automatically stopped after operation starts can be set in increments of 5 minutes 1E Temperature shift for cooling heating change in auto heat cool mode Auto heat cool selects the operating mode automatically based on the differenc...

Page 74: ... of shipping this setting is set according to the conditions of the indoor unit 2E T10 terminal input switching Ordinarily the T10 terminal is used as the HA terminal at the time of shipping However this setting is used when the T10 terminal is used for OFF reminder or for fire prevention input 31 Ventilation fan operation from remote controller It is possible to install a total heat exchanger and...

Page 75: ... mode Changes flap operation to draft reduction mode 46 DC flap swing mode Selects the swing operation mode for the flap 5d DC fan tap setting Sets the DC fan tap according to the purpose of use Change the settings data at the same time 5E Humidifier ON time Sets the humidifier output ON time for when the humidifier is operating ON OFF control is performed during humidifier operation This setting ...

Page 76: ...tor to the connector pin TP1 2P red on the indoor unit con trol PCB If the setting No is 3 then connect the jumper connector to the connector pin TP3 2P yellow on the indoor unit control PCB 1 Way Cassette type Procedure Be sure to turn OFF the main power source before performing the steps below Open the electrical component box cover then check the indoor unit control PCB Fig 4 5 Connect the jump...

Page 77: ...ress and hold the and buttons for 4 seconds or longer Simple settings Filter life time operating mode priority central control address and other settings Press and hold the and buttons for 4 seconds or longer When settings are made from a remote controller the indoor unit where that remote controller is connected stops Detailed settings System address indoor unit address central control address an...

Page 78: ...ns Test Run Function Operates the unit with the thermostat forced ON Procedure Press and hold the button for 4 seconds or longer Test appears on the remote controller LCD display Fig 4 6 Start operation Press the button to return to normal remote controller display Fig 4 6 2 3 1 4 CZ RTC2 ...

Page 79: ...ture See figure at right Press the temperature setting and buttons to change the item code to the sensor address of the sensor you wish to monitor For the relationship between the sensor address and sensor type refer to the sensor temperature relationship table on next page 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 ...

Page 80: ...tdoor unit heat exchanger temperature C1 Indoor unit heat exchanger temp E3 Discharge air temp Discharge air temp setting Indoor unit MOV position Outdoor unit High pressure sensor temp Suction temp TS Outside air temperature Inverter primary current Sensor Temperature Relationship Table Room temp 1 Remote controller temp Discharge temp TD 1 Main unit only in case of group control Sensor address M...

Page 81: ...5 TROUBLE DIAGNOSIS 1 Contents of Remote Controller Switch Alarm Display 5 2 2 Outdoor Unit Control Panel LED Display 5 4 3 Mini VRF System Alarm Codes 5 5 4 Inspection of Parts Outdoor Unit 5 51 5 Symptom Thermostat in OFF continues or cycles OFF ON too frequently 5 52 ...

Page 82: ... do not correspond to the number set at main outdoor unit PCB Error of sub outdoor unit in receiving serial communication signal from main outdoor unit Outdoor unit serial communications failure Error of main indoor unit in receiving serial communication signal from sub indoor units Duplication of main indoor unit address setting in group control Duplication of outdoor R C address setting Group co...

Page 83: ...ressor start up failure Overcurrent at time of INV compressor starts up etc IPM trip IPM current or temperature Indoor coil temp sensor E1 Indoor coil temp sensor E3 Indoor suction air room temp sensor TA Indoor discharge air temp sensor BL Comp discharge gas temp sensor TD Outdoor coil liquid temp sensor C1 Outdoor air temp sensor TO Compressor intake port temperature sensor TS High pressure sens...

Page 84: ...system however the number of indoor units does not match the number that was set Automatic address setting was completed successfully After the power is turned ON the number of detected indoor units connected to that system matches the number that was set and regular communications are occurring Automatic address setting is in progress At time of automatic address setting the number of indoor unit...

Page 85: ...n in Group Control Wiring Auto Address Alarm too many units F04 F07 Heat Exchanger Inlet Temperature Sensor C1 Error Compressor Discharge Temperature Sensor Error F08 F12 F16 F31 Outdoor Unit Nonvolatile Memory EEPROM Error High Pressure Sensor Error Compressor Intake Temperature Sensor TS Error Outdoor Air Temperature Sensor TO Error H01 H02 H03 H31 HIC Error Compressor CT Sensor Current Sensor U...

Page 86: ...t s and outdoor unit s 2 2 Check the setting of the number of indoor units on the outdoor control PC board Is the setting the same as the number of indoor units that are actually connected 3 1 3 3 3 6 Is the indoor outdoor control line connected to more than one outdoor unit Network wired 3 2 3 4 Correct the setting Is the Terminal resistor select switch on the outdoor control PC board set to just...

Page 87: ...rly installed or the nonvolatile memory is faulty Correct this or after replacing the nonvolatile memory write model data to it in the remote control detailed settings mode 3 6 Is there a short miswiring disconnection wrong contact or grounding in the remote control s wiring 3 7 Is the LED blinking on the indoor unit s control PC board 3 5 Are there any indoor units with their power off in the rem...

Page 88: ...5 8 5 Mini VRF SYSTEM Trouble Diagnosis 3 Mini VRF System Alarm Codes LED OPTION CHK Pin DC Motor Model Indoor Unit Control Board TEST Pin LED CHK Pin AC Motor Model Indoor Unit Control Board OPTION ...

Page 89: ...the wireless remote controller and or optional control PC board connected to on the indoor unit s control PC board Is the indoor unit under group control 1 1 Are the wires 1 white 2 black to the remote control group shorted or opened 1 2 2 1 Disconnect the connector mentioned above on the board of the indoor unit control PC board and see whether the E02 goes off after several minutes When doing so...

Page 90: ...ler ON OFF controller system controller 1 4 Remote controller 3 Indoor unit control PC board 1 Central control unit E03 Error in Indoor Unit Receiving Signal from Remote Controller central Error Detection Method When indoor unit s are connected Error Diagnosis It is judged an error when there is no communication from any remote controller collectively in a 3 minute period or if there is no communi...

Page 91: ...5 11 5 Mini VRF SYSTEM Trouble Diagnosis 3 Mini VRF System Alarm Codes AC Motor Model Indoor unit Control PC Board DC Motor Model Indoor unit Control PC Board OPTION RC OPTION RC ...

Page 92: ...SHORT setting is just one unit 2 3 Yes No No 4 4 4 5 Yes No Remove the short 4 2 Yes No 4 3 4 5 Yes No No No 4 1 Check the indoor unit addresses from the remote control s detailed settings mode Is it Not Set 99 or is the indoor unit s address duplicated 3 3 When the network of indoor outdoor operation line was wired was the SHORT setting of the terminal resistor switch on the outdoor control PC bo...

Page 93: ... to the Reference Materials For information on the procedures for replacing the nonvolatile memory EEPROM of the indoor unit and or replacing the indoor unit s control board refer to the manual that is packaged with the indoor unit service board DC Motor Model Indoor unit Control Board AC Motor Model Indoor unit control Board LED LED CHK Pin TEST Pin OPTION OPTION RC RC CHK Pin for single phase ou...

Page 94: ...t is packaged with the indoor unit service board 1 2 Is the terminal resistor select switch on the outdoor main PC board set to OPEN Is the indoor outdoor operation line opened or shorted 1 3 1 4 Replace the indoor unit control PC board 1 5 Is the indoor outdoor operation line connected to more than one outdoor unit Network wired 1 1 Is the SHORT on the terminal resistor select switch on the outdo...

Page 95: ...nnected to on the indoor unit s control PC board 3 2 Power on 2 1 Correct the wiring 3 1 3 3 3 5 Yes Yes Yes No No No Disconnect the connector mentioned above on the control PC board of the indoor unit control PC board and see whether the E06 goes off after several minutes When doing so if two remote controllers are being used and the wireless remote controller is the main remote controller set th...

Page 96: ... to the manual that is packaged with the service board 1 2 Is the terminal resistor select switch on the outdoor main PC board set to OPEN Is the indoor outdoor operation line opened or shorted 1 3 1 4 Replace the outdoor unit main PC board 1 5 Is the indoor outdoor operation line connected to more than one outdoor unit Network wired 1 1 Is the SHORT on the terminal resistor switch on the outdoor ...

Page 97: ... the remote control detailed settings mode The multiple unit DISP pin is shorted across the indoor unit whose address is Not Set Remove the short 1 2 Is the DISP pin on the indoor unit control PC board shorted 1 1 Conduct checks prior to auto address setting Does E08 fail to go off even after running auto address setting again 1 2 1 3 1 4 Yes Yes No No 1 3 Do not make changes to indoor unit addres...

Page 98: ...Z RTC2 1 2 Set one of the 2 remote controllers to sub 1 1 1 Remote controller Press and hold both buttons for 4 seconds or longer Press button Once the display changes from flashing to steady the setting is complete Once you press button the remote controller returns to its normal display This will display the item 01 and the setting data 0001 or the like on the remote controller s display Press T...

Page 99: ...n to start auto address setting is given from another controller during the auto address setting process When one controller in a networked system is running auto address setting it is not possible to start auto address setting from another controller Wait until the auto address setting in progress finishes 1 1 Auto Address E13 Error in Indoor Unit Transmitting Signal to Remote Controller Error De...

Page 100: ...d the wireless remote controller is the main remote controller set the other remote controller as the main Replace all optional control PC board or wireless remote control parts including wiring 4 3 4 4 Is the LED blinking on the indoor unit s control PC board 4 5 Set the number of the indoor unit setting at No 10 on the outdoor unit s control PC board And compare the status of the indoor unit s c...

Page 101: ...rror when there are too many indoor units that reply to communications and this is determined from the number of indoor units specified with the outdoor unit This is detected even when auto address setting is not used 1 2 1 The actual number of indoor units is more than that specified at the outdoor unit Conduct checks prior to auto address setting 1 1 Auto Address ...

Page 102: ... the indoor unit in the control group are shorted Remote control group wiring is opened More than one indoor unit in the control group is set to Main An indoor unit in the control group is set to Separate The DISP pin of an indoor unit sub remote controller in the control group is shorted 1 2 Replace all optional control PC board and or wireless remote control parts including wiring Replace the in...

Page 103: ...door unit is turned on 1 2 The indoor unit is not turned on The address es of indoor unit s are not assigned correctly The indoor outdoor control line may be disconnected somewhere between the indoor unit s and the outdoor unit Check and make sure the indoor outdoor control line is connected Are the address es of indoor unit s assigned correctly 1 1 Are the indoor units turned on 1 2 1 3 1 2 Set i...

Page 104: ... the power back on Power on Yes No 1 Power wiring E30 Outdoor Unit Serial Transmission Error Error Detection Method Error Diagnosis Outdoor unit unable to read and confirm its own transmission data with the board of the outdoor unit The power to the control PC board of the outdoor unit is not turned on The circuit on the control PC board of the outdoor unit faulty Transmission from an outdoor unit...

Page 105: ...connected to PC board properly 1 1 Sensor is correctly installed at holder side 1 2 1 2 Reconnect and check Replace sensor Correct and see what happens 1 3 Yes No 1 Sensor 2 PC board 3 Operating status Yes No Resistance between connector pins on PC board is less than 1 k ohm 2 1 Replace PC board 2 2 Yes No Peripheral temperature of outdoor unit is over 46 C 3 1 Check noise 3 3 Correct 3 2 Yes No T...

Page 106: ...tion Method Error Diagnosis It is judged an error when open circuit or short circuit 1 2 Sensor connector is connected to PC board properly 1 1 1 2 Reconnect and check Yes No 1 Sensor 2 PC board Replace PC board because of outdoor control PC board failure 2 1 Resistance between sockets is infinity or 0 ohm 1 2 Replace sensor 2 1 Yes No ...

Page 107: ...Method 1 It is judged an error when open circuit or short circuit Error Diagnosis 2 Sensor connector is connected to PC board properly 1 1 1 2 Reconnect and check Yes No 1 Sensor 2 PC board Replace PC board because of outdoor control PC board failure 2 1 Resistance between sockets is infinity or 0 ohm 1 2 Replace sensor 2 1 Yes No ...

Page 108: ...d Error Diagnosis It is judged an error when open circuit or short circuit 1 2 Sensor connector is connected to PC board properly 1 1 1 2 Reconnect and check Yes No 1 Sensor 2 Outdoor control PC board Replace PC board because of outdoor control PC board failure 2 1 Resistance between sockets is infinity or 0 ohm 1 2 Replace sensor 2 1 Yes No ...

Page 109: ...measuring the value of actual high pressure connect the measuring gauge to the high pressure outlet port and measure it The detect pressure value is the pressure value indicated by the monitoring software display 2 3 3 1 Is sensor resistance value in normal Disconnect the connector and measure the resistance value between each wire of sensor Correct reference values between 1 2 8 5 ｋ ohm 1 3 1 0 ｋ...

Page 110: ...d below When power initially turned ON for the first time nonvolatile memory EEPROM is not installed Read values after writing onto nonvolatile memory EEPROM is inconsisntent 1 2 Does EEPROM exist on the control PC board 1 1 1 2 Install EEPROM Yes No 1 PC board Incorrect EEPROM Replace with correct EEPROM 1 3 Is EEPROM installed properly Check Bent IC pin or incorrect installation etc 1 2 1 3 Corr...

Page 111: ...iagnosis Primary current effective value detected overcurrent trip current value Trip current value Single phase model hp horse power 1 2 2 2 3 2 2 Loose electrical wire connection 2 1 Correct wiring 2 3 Has FUSE 1 blown Check the electrical conduction with tester 2 2 Yes Yes No No Replace CR board 2 3 PC board wiring Check not only in the outdoor unit stop mode but in the drive mode Heating Cooli...

Page 112: ... No 2 1 2 2 2 3 Correct connection 2 2 Correct connection or wiring 2 3 Yes No 2 PC board wiring Yes No Extreme voltage fluctuations Extreme distortion of voltage waveform Check power supply 2 1 Yes No Check power supply Loose electrical wire connection Is HIC PC board connector CN PAM poorly connected or opened with wire Replace HIC PC board Check not only in the outdoor unit stop mode but in the...

Page 113: ...See what happens Yes No 1 Check the control PC board H03 Compressor CT Sensor Current Sensor Unplugged Error Detection Method Error Diagnosis If 18A or greater is detected when the compressor is stopped alarm triggered even if the connector is unplugged If no current is detected even though a compressor is running 1 2 It is judged an error based on the criteria listed below ...

Page 114: ...No 3 2 HIC poor radiation Yes No Everything is normal in the wiring power cord signal line between the HIC and the outdoor CR board Check the wiring one by one with a tester if there is opened and grounding The heat dissipating surface on the back of the HIC is in good contact with the heat sink heat dissipating fins of the electrical box Check for looseness in the fastening screws and the conditi...

Page 115: ...ini VRF SYSTEM Trouble Diagnosis 3 Mini VRF System Alarm Codes NU for Single phase outdoor unit HIC PC board for 3 phase outdoor unit HIC PC board W V U P NU W V U P for 3 phase outdoor unit CR PC board CN PRY1 ...

Page 116: ...entical self address communication on the indoor and outdoor wirings is received over 5 times within 3 minutes 1 2 Are other outdoor units using a duplicate setting 1 1 2 1 2 2 Yes No 2 When units are networked first set the system address for each outdoor unit in the order 1 2 3 and then run auto address setting 2 1 Run the auto address setting 2 2 Installation or setting related 1 System address...

Page 117: ...lation or setting related It is judged an error when outdoor unit capacity not yet setup or systematically unauthorized setting Check Connect the outdoor maintenance remote controller and check whether item code 81 outdoor capacity value shows 0 or unauthorized capacity is set on the detailed setting mode display of the outdoor EEPROM If the capacity value of the item code 81 with the outdoor main...

Page 118: ... Correct connector Yes No 2 Has the 4 way valve wiring become opened 1 2 Is the wire from the coil for controlling the 4 way valve firmly connected to the 4 way valve 1 3 4 way valve 1 PC board wiring Correct wiring 1 3 Yes No 2 1 Correct connector Yes No During heating mode Comp ON insert and remove the connector wired from the 4 WAY valve into or from CN 20S connector on the HIC PC board At the ...

Page 119: ...ockage in refrigerant circuit Yes No Tends to have insufficient refrigerant charge in the system Service valve inside the outdoor unit closed Additional refrigerant charge 2 2 Yes No Open service valve Replace CR board Yes No Replace the strainer Are the tubes clogged Is the outdoor unit s electronic control valve operating correctly Check for debris clogging the electronic control valve a problem...

Page 120: ...e plugs on the outdoor PC board as well as if any wiring is opened Are these checking finished without fail 3 4 4 1 Replace the outdoor unit fan Correct connection and or wiring Yes No While heating is operating an alarm is occurred 3 5 3 6 4 1 Yes No 2 Service valve 3 Problem around the heat exchanger P04 Actuation of High Pressure Switch Error Detection Method Error Diagnosis It is judged an err...

Page 121: ...ting correctly check for debris clogging the valve a problem with the electronical coil and or the control PC board 4 2 4 3 Repair the expansion valve of the indoor unit Yes No 3 Problem around the heat exchanger 4 Blockage in the refrigerant circuit Error occurs when the system is operating in cooling mode 5 1 5 3 5 2 Yes No An alarm is occurred with the high pressure at 3 80 MPa with the pressur...

Page 122: ...k on and check again Is the alarm triggered again 4hp 5hp Common in RE1 and RE2 Plug in type 6hp Fastening screw type 3 2 Replace the outdoor unit HIC PC board 4 1 Yes No 3 Check the outdoor unit HIC PC board 2 Check the outdoor unit CR PC board There may be a instantaneous blackout failure If there is nothing abnormal see what happens RE1 RE2 4 1 4 Final check P05 Power Supply Error Error Detecti...

Page 123: ... The status of small temperature change of the oprating indoor unit continues for 3minutes even after 7 minute to 15 minute since the heating test run has started 1 1 2 1 Yes No 1 Service valve Open the service valve 2 1 2 Adjustment to refrigerant change 3 Blockage in refrigerant circuit 3 1 Avoid clogging 3 2 Yes No Are the tubes clogged Not additional refrigerant charged 3 1 Yes No Additional r...

Page 124: ... an error whenever the outdoor unit receives the signal O2 Alarm Occurred from the indoor unit With the indoor unit s EEPROM setting item code 0B set to 0001 the EXCT input was shorted 1 2 Is an O2 sensor being used Correct wiring 4 1 Yes No Is the indoor EXCT socket wire shorted 3 1 3 4 Indoor EXCT wiring 4 3 4 2 Yes No Is the alarm triggered if the indoor EXCT socket wire is disconnected and the...

Page 125: ...r in the connections of components that are connected by wiring from the CR board 2 2 Correct 2 3 Yes No Correct 2 4 Yes No 2 3 Disconnected parts miswiring and or poor connections loose are observed in the connections of outdoor board s that are connected by wiring from the HIC board Correct 2 5 Yes No 2 4 Disconnected parts miswiring and or poor connections loose are observed in the connections ...

Page 126: ...ctional parts 5 5 Yes No Even though the high pressure saturation temperature is 43 C or less the secondary current of the inverter is high The frequency Hz ends up dropping due to the current 5 6 Replace the compressor See what happens Yes No Tends to have insufficient refrigerant charge in the system 5 5 Adjust the amount of refrigerant 5 6 Yes No 4 Check the situation 5 Check operation Dividing...

Page 127: ...gered Measure with an analog tester Set to the k ohm range Measure the board by itself Remove wires connected from other parts Measure using IPM terminals Conforming part resistance value measure with an analog tester Excepting the parts of value is 0 short circuit it is acceptable if a small resistance value appears as a reference value unless the HIC board IPM Pass Fail Tests Tester terminals Re...

Page 128: ...r Diagnosis It is judged an error when the outdoor fan motor s rotating signal cannot be detected normally 1 2 Are the connectors CN FMA CN FMB CN FM1 and CN FM2 firmly connected to the outdoor control PC board lock engaged 3 Turn the power on and run the unit again is P22 triggered again Or can you see or hear anything that is obviously wrong in its rotation Replace the outdoor control PC board I...

Page 129: ...wiring is observed in the connections of the compressor terminals 1 4 4 1 Check the outdoor control PC board Replace the control PC board and operate the unit 3 1 3 2 4 1 Yes No 3 Check the HIC PC boards Replace the HIC board 3 2 Replace the HIC PC board and operate the unit Apply putty and screws must not be loose Does it operate normally Yes No See what happens See what happens The results of th...

Page 130: ...osis 3 Mini VRF System Alarm Codes Single phase outdoor unit HIC board 3 phase outdoor unit HIC board NU W V U P NU W V U P CN VDC CN VDC 4WAY Valve CN 20S Crankcase heater CN CH 4WAY Valve CN 20S Crankcase heater CN CH PIN1 VDC PIN2 VDC ...

Page 131: ...owing operations will start after turning ON the outdoor unit power when the test pin CN TEST black is short circuited Set DC fan motor at W5 FM1 340 360 rpm FM2 360 380 rpm 20S turns ON for 0 5 sec Check Inter unit control wiring circuit If normal state go to the next step If not it stops after LED1 starts blinking at 0 5 sec intervals and LED2 turns off Connector CH1 turns ON for 0 5 sec Do the ...

Page 132: ...ontrol PC board and check alarm messages See operational status 2 2 Yes No 2 2 Discharge temperature is over 80 C in stop mode and does not decrease Connect outdoor maintenance remote controller to RC socket on outdoor unit main control PC board and check alarm messages Replace discharge temperature sensor 2 3 Yes No 2 3 Demand value always stays low The value is lower than 70 Excluding 1 unlimite...

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Panasonic U-4LE1E5, Service Manual, Page: 60 / 133

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