Panasonic U-8ME2E8 Service Manual & Test Run Service Manual Download Page 91

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2WAY SYSTEM

Outdoor Unit Repair Procedures

4. Recovering Refrigerant

Fig. 5-c

Fig. 5-d

Refrigerant recovery cylinder

Refrigerant

recovery unit

Manifold

gauge

Lo Hi

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

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

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

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

Type 14HP / 16HP

Refrigerant recovery cylinder

Refrigerant

recovery unit

Manifold

gauge

Lo Hi

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

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

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

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

Type 18HP / 20HP

SM830253-00_欧州2way7_SM-TRSM.indb 15

16/08/26 19:25:07

Summary of Contents for U-8ME2E8

Page 1: ...5CE SM830214 04 2WAY SYSTEM indb 1 2014 08 26 17 18 12 SM830244 01_2WAY_7 Series indb 1 15 12 22 10 16 52 8 HP 10 HP 16 HP 12 HP 14 HP Rated Capacity ME2 Type Outdoor Unit Type 2WAY System U 8ME2E8 U...

Page 2: ...M1 Slim Low Static Ducted S 15MM1E5A S 22MM1E5A S 28MM1E5A S 36MM1E5A S 45MM1E5A S 56MM1E5A P1 Floor Standing S 22MP1E5 S 28MP1E5 S 36MP1E5 S 45MP1E5 S 56MP1E5 R1 Concealed Floor Standing S 22MR1E5 S...

Page 3: ...elp 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 responsible for imp...

Page 4: ...le liquid refrigerant carefully as it may cause frostbite When Transporting Be careful when picking up and moving the indoor and outdoor units Get a It may need two or more people to carry out the ins...

Page 5: ...lfunction of this appliance do not repair by yourself Contact to the sales dealer or service dealer for a repair CAUTION Ventilate any enclosed areas when installing or testing the refrigeration syste...

Page 6: ...than air it poses the risk of suffocation if its density should rise excessively Suffocation from leakage of refrigerant is almost non existent With the recent increase in the number of high density b...

Page 7: ...efects in the unit 2 2 Since refrigerant composition changes and performance decreases when gas leaks collect the remaining refrigerant and recharge the required total amount of new refrigerant after...

Page 8: ...the additional refrigerant amount charged in the field and the total refrigerant charge on the refrigerant charge label supplied with the product The filled out label must be adhered in the proximity...

Page 9: ...erature Control 2 2 2 Heating Standby 2 4 3 Automatic Fan Speed Control 2 5 4 Indoor Unit MOV Control 2 6 5 Drain Pump Control 2 6 6 Automatic Heating Cooling Control 2 7 7 Discharge Air Temperature C...

Page 10: ...s of Remote Controller Switch Alarm Display 6 2 2 Outdoor Unit Control Panel LED Display 6 4 3 2WAY Alarm Codes 6 5 4 Blinking Inspection Display 6 26 5 Inspection and Characteristics of Parts 6 27 6...

Page 11: ...Unit Fan Control 1 16 6 Outdoor Unit CCU command controller unit Control 1 20 7 Oil Control 1 25 8 4 Way Valve Adjustment Control 1 28 9 Defrost Control 1 29 10 Demand Control 1 32 11 Backup Operatio...

Page 12: ...and controller unit functions that controls the entire system This outdoor unit is the main outdoor unit For the main outdoor unit perform all the settings in the table PCB setting of outdoor unit bel...

Page 13: ...ion cable and multiple systems are required to operate simultaneously by the central control device all main outdoor units will begin operating simultaneously In this situation the load of the power s...

Page 14: ...er compressor is higher than that of other outdoor unit 3 Outdoor Unit Stop Rules 1 Stopping of all outdoor units When all outdoor units must stop all units will stop in order of unit No every one sec...

Page 15: ...rter operating time Longer operating time Outdoor unit small address installed in outdoor unit Outdoor unit large address installed in outdoor unit 1 1 Select first priority order of compressor in eac...

Page 16: ...essor frequency to 25Hz temporarily and then start an additional compressor The operation noted above is performed when the inverter compressor 1 or 2 is additionally started If necessary capacity is...

Page 17: ...n of evaporation temperature Te Lowest temperature of all indoor units evaporation temperature E1 E3 in the system including the stopped indoor units Definition of condensation temperature Tc Highest...

Page 18: ...etween cooling and heating operation In Cooling Mode The purpose of this control at cooling is to prevent abnormal high pressure 1 The evaporation temperature area changes depending on the maximum loa...

Page 19: ...or capacity decrease Compressor capacity increase prohibited Compressor capacity increase possible Area D Area C Area B Area A 50 1 48 0 50 0 15 30 0 48 0 40 5 34 0 33 0 C Max required level 42 0 PX 5...

Page 20: ...If it maintains in the Area C the thermostat may turn OFF Once the indoor unit is selected for the test run the thermostat will not be turned OFF However condensation temperature control is performed...

Page 21: ...14 0 18 5 17 5 11 0 15 0 12 5 11 5 Current limit 2 Maximum current 2 H Secondary Limit current 1 2 Max current 1H 2H Max current 1L 2L Maximum current 2 L Stop If this current is detected at regular i...

Page 22: ...pressor starts the valve is ON for 10 seconds After that it turns OFF SAVE valve 5 seconds 10 seconds Inverter compressor starts Compressor 2 SAVE Valve SAVE Valve turns ON 3 00 MPa 2 90 3 42 Renewal...

Page 23: ...Control 5 Accumulator Valve ACV The purpose of this valve is to recover oil and refrigerant from the accumulator to the compressor This valve turns OFF when the compressor operation just started This...

Page 24: ...lse MOV2 pulse Stop Stop 0 0 Operation 480 480 Stop 0 1 0 1 Operation 0 480 2 0 480 2 Stop 0 0 When the indoor unit receives the signal for operation request from the control equipment the pulse turns...

Page 25: ...r more MOV4 opens to 100 pulses to cool down the compressor Then the MOV4 operates according to the state of the discharge temperature between 20 480 pulses This operation takes priority over SC contr...

Page 26: ...ode Temperature of Outdoor TO 3 Minimum Fan Mode and Maximam Fan Mode NOTE If the upper limit rotation number is changed it cannot be changed for 3 minutes The frost formation detect line should be us...

Page 27: ...n mode may be decreased when the system detects refrigerant shortage at an indoor unit During cooling operation if the fan mode becomes 0 and this condition maintains for 3 minutes the fan mode is cha...

Page 28: ...ircuiting SILENT plug on the PCB Maximum fan mode maximum frequency in silent mode When the setting is external input to PCB unnecessary this function always works When the setting is Capacity is give...

Page 29: ...tes for 45 seconds and stops for 2 hours when ambient temperature is 5 1 C or more Fan motor operates for 45 seconds and stops for 1 5 hours when ambient temperature is 0 1 5 0 C Fan motor operates fo...

Page 30: ...uators of indoor unit are controlled by CCU 1 1 1 Indoor unit without RAP valve kit 1 SH control adjusts the difference between the liquid temperature and gas temperature in indoor unit unit pulse MOV...

Page 31: ...op Operation Stop Operation Stop Operation Stop Stop Stop OFF OFF ON ON Operation 20 20 20 20 20 20 20 20 20 20 20 60 480 SH control 1 65 480 pulses SC control 3 20 Operation Operation Fan only Coolin...

Page 32: ...intervenes in fan control of the indoor unit according to the status of the operating mode The priority order of fan control by the CCU is higher than that of indoor units Operating mode of outdoor un...

Page 33: ...at OFF or operation stopped All mode Cooling mode Dry mode Heating mode Cooling mode Dry mode Both Setting No 4 and 5 functions DP operates for XX minutes when indoor unit s operation changes from the...

Page 34: ...gnal of indoor PCB not by the CCU Once the drain pump operates it keeps operating for 20 minutes EEPROM setting in main outdoor unit CODE 2B Setting No 20 30 40 60 XX 20 minutes 30 minutes at factory...

Page 35: ...come short of oil in the system Check valves related to oil recovery operation the refrigerant tubing and for any oil leakage The compressor oil in the crankcase is sent by bypass via a capillary tub...

Page 36: ...lower the system oil recovery control will start This timer will be cleared when the oil level 2 continues for 5 minutes If any compressor oil level 2 remains in the same outdoor unit even though one...

Page 37: ...de of indoor unit Thermostat ON OFF Setting No 0 EEPROM setting in main outdoor unit CODE 24 Setting No 1 Stop Fan Cooling Stop Fan Cooling OFF ON OFF ON 80 160 80 160 80 160 Present pulse 20 80 160 8...

Page 38: ...are ON The first operation after all outdoor units stopped for 60 minutes For 60 seconds Indoor units Control time Outdoor units MOV RAP valve kit Fan All outdoor units operate at the maximum capacit...

Page 39: ...nimum heat exchanger temperature C 10 Ambient temperature C Frost detection area below the bold lines L1 and L2 L1 L2 15 Defrosting operation end temperature unit C 1 3 8 10 25 5 27 5 L1 line shown in...

Page 40: ...he outdoor unit heat exchanger is not functioning as an evaporator such as stopped outdoor units EEPROM setting in main outdoor unit CODE A3 Setting No 25 30 XX 25 minutes 40 minutes at factory shipme...

Page 41: ...ting Outdoor compressor s where defrost occurs first Stopped indoor unit s Outdoor compressor s where defrost follows later Outdoor unit s where defrost follows later Outdoor unit s where defrost occu...

Page 42: ...current limitation values set at the outdoor unit EEPROM setting DN1A Discharge temperature limitation control is performed set at the indoor unit EEPROM setting Outdoor unit EEPROM setting DN18 A B...

Page 43: ...be set as needed with serial parallel I O It is able to display the present condition on the remote controller The rated current indicates the current value that is listed in the catalog or similar ma...

Page 44: ...k and Seri Para I O unit refer to the installation instructions supplied with the unit It is also possible to make setting that the display symbol of demand activated is concealed as shown in the foll...

Page 45: ...units in the system operate normally Caution After automatic backup control started by alarm shown in Alarm List 1 it will not be cancelled automatically even though the repair work of the failed out...

Page 46: ...or in outdoor unit heat exchanger 1 Ambient air temperature thermistor error Compressor inlet temperature thermistor error Super cooling gas sensor error High pressure sensor error Low pressure sensor...

Page 47: ...by CCU However the CCU function stays active Disconnecting the failed outdoor unit 2 2 At the SW7 switch on the PCB of the failed outdoor unit turn ON the switch for the compressor to disable and turn...

Page 48: ...it Sub outdoor unit Sub outdoor unit Number of setting 2 Not necessary Not necessary Unit No 1 2 3 All compressors in unit No 2 are backed up Therefore the setting No of outdoor units installed on the...

Page 49: ...hether to switch the mode in XX minutes intervals While the system is stopped change the mode immediately 12 Other Functions EEPROM setting in main outdoor unit CODE 27 Setting No 0 XX Invalid at fact...

Page 50: ...its However the upper limit value set by the code 23 must be less than 25 of the total number of indoor units of the system EEPROM setting in main outdoor unit CODE 23 Allowed number of missing indoor...

Page 51: ...0 Demand Control 1B Demand 2 current 0 0 40 40 45 45 70 70 P 130 130 1 No control For details see 10 Demand Control 1E Demand remote controller display 0 No demand display 1 When demand ON demand acti...

Page 52: ...ure setting 0 Invalid P 1 Valid For details see 5 Outdoor Unit Fan Control 7 A3 The minimum operating time 1 until defrosting 20 20 minutes 21 minutes 40 40 minutes P 41 90 Never use For details see 9...

Page 53: ...Unit Control PCB 1 Outdoor Unit Control PCB CN33 HPS CN46 CN34 LPS CN49 OIL1 2 CN54 DISCH1 CN55 DISCH2 CN56 TO CN53 SCT CN65 EXG1 2 CN61 EXL1 2 CN60 SW4 SW3 SW2 SW1 CN25 CN22 CN23 CN24 CN40 CN30 CN27...

Page 54: ...2WAY SYSTEM Control Functions Outdoor unit 1 44 1 14 Outdoor Unit Control PCB PCB and Functions 1 Outdoor Unit Control PCB 2 Outdoor Unit HIC PCB SM830253 00_ 2way7_SM TRSM indb 44 16 08 26 19 23 22...

Page 55: ...YSTEM Control Functions Outdoor unit 1 14 Outdoor Unit Control PCB PCB and Functions 1 Outdoor Unit Control PCB 3 Outdoor Unit FIL PCB 4 Outdoor Unit FAN PCB SM830253 00_ 2way7_SM TRSM indb 45 16 08 2...

Page 56: ...itch and S002 If 10 19 systems are set set switch 1 10s digit to ON If 20 29 systems are set set switch 2 20s digit to ON and set switch 1 10s digit to OFF If 30 systems are set set both switch 1 10s...

Page 57: ...ng When auto address setting is completed release the short circuit to return the unit to normal status When cooling mode is short circuited cooling operation can be used When heating mode is short ci...

Page 58: ...N ON ON ON ON ON 30 0 ON ON Table 3 Setting the Number of Outdoor Units SW6 DIP switch Black Number of Outdoor Units SW6 Setting 1 2 3 1 ON OFF OFF 2 OFF ON OFF 3 ON ON OFF 4 OFF OFF ON SW5 DIP switch...

Page 59: ...2WAY SYSTEM Control Functions Outdoor unit 1 15 Electrical Data Electrical Data 1 Outdoor Unit 1 Electric Wiring Diagram U 8ME2E8 U 10ME2E8 U 12ME2E8 SM830253 00_ 2way7_SM TRSM indb 49 16 08 26 19 23...

Page 60: ...2WAY SYSTEM Control Functions Outdoor unit 1 50 1 15 Electrical Data Electrical Data 1 Outdoor Unit Schematic Diagram U 8ME2E8 U 10ME2E8 U 12ME2E8 SM830253 00_ 2way7_SM TRSM indb 50 16 08 26 19 23 24...

Page 61: ...1 51 2WAY SYSTEM Control Functions Outdoor unit 1 15 Electrical Data Electrical Data 1 Outdoor Unit 2 Electric Wiring Diagram U 14ME2E8 U 16ME2E8 SM830253 00_ 2way7_SM TRSM indb 51 16 08 26 19 23 24...

Page 62: ...2WAY SYSTEM Control Functions Outdoor unit 1 52 1 15 Electrical Data Electrical Data 1 Outdoor Unit Schematic Diagram U 14ME2E8 U 16ME2E8 SM830253 00_ 2way7_SM TRSM indb 52 16 08 26 19 23 25...

Page 63: ...1 53 2WAY SYSTEM Control Functions Outdoor unit 1 15 Electrical Data Electrical Data 1 Outdoor Unit 3 Electric Wiring Diagram U 18ME2E8 U 20ME2E8 SM830253 00_ 2way7_SM TRSM indb 53 16 08 26 19 23 26...

Page 64: ...2WAY SYSTEM Control Functions Outdoor unit 1 54 1 15 Electrical Data Electrical Data 1 Outdoor Unit Schematic Diagram U 18ME2E8 U 20ME2E8 SM830253 00_ 2way7_SM TRSM indb 54 16 08 26 19 23 26...

Page 65: ...oor Unit MOV Control 2 6 5 Drain Pump Control 2 6 6 Automatic Heating Cooling Control 2 7 7 Discharge Air Temperature Control 2 8 8 RAP Valve Kit Control 2 8 9 Automatic Flap Control 2 9 10 Filter Sig...

Page 66: ...temperature near the floor must be considered To correct this difference in temperature the correction temperature is used The factory setting for the correction temperature is different depending on...

Page 67: ...emote controller sensor 17 0 20 5 21 0 Room temp temp detected by remote controller sensor 17 0 17 0 20 5 20 5 21 0 21 0 T 3 0deg 0 5deg 1 0deg Thermostat ON Thermostat OFF Thermostat OFF The thermost...

Page 68: ...5 Outdoor temperature C Heating operation mode Discharge temperature setting at 45 C Cooling operation mode Discharge temperature setting at 18 C Fan operation mode Discharge temperature setting in a...

Page 69: ...utomatic fan mode The fan mode does not change for 3 minutes during cooling operation and 1 minute during heating operation once it is changed The values in the parenthesis are when the remote control...

Page 70: ...orked The drain pump may often operate for a while when the cooling thermostat turns OFF or the indoor unit is stopped The drain pump can be turned on when the cooling thermostat is OFF if the setting...

Page 71: ...oom temperature Control temperature for heating 1 0 degree When setting temperature in remote controller is 20 C in the cooling mode Heating Heating thermostat OFF Cooling Cooling thermostat OFF Heati...

Page 72: ...emperature setting 3 5 C is continuously detected for 7 minutes in cooling mode Temperature more than Discharge air temperature setting 3 5 C is continuously detected for 7 minutes in heating mode The...

Page 73: ...ove The flap closes once and moves to the set position when the operating mode is changed If the flap position cannot be adjusted because of a problem only the swing operation can be used Check the fl...

Page 74: ...remote controller 1 1 T deg 11 Fan Control during Dry Mode The fan control during dry mode is as follows A Fan mode set in the remote controller B Fan mode is L during thermostat ON LL during thermost...

Page 75: ...on turns OFF The ventilation fan can also be turned ON and OFF using the ventilation button on the remote controller Refer to the operating instractions supplied with the remote controller To enable t...

Page 76: ...Way Cassette 60 60 4 deg 2 deg L1 2 Way Cassette 4 deg 2 deg D1 1 Way Cassette 4 deg 2 deg F2 Low Silhouette Ducted 4 deg 2 deg T2 Ceiling 4 deg 2 deg K1 Wall Mounted 2 deg 2 deg K2 Wall Mounted 3 deg...

Page 77: ...ischarging Compressor Oil 3 3 3 Backup Operation 3 6 4 Recovering Refrigerant 3 8 5 Checking for Leakage After Repair 3 17 6 Evacuating System 3 20 7 Charging Compressor Oil 3 23 8 Pumping Out Refrige...

Page 78: ...rt working CAUTION Fig 1 a Fig 1 b Fig 1 c Front panel Front panel Tubing cover Power outlet panel Type 8HP 10HP Compressor front cover Compressor upper cover Front panel Front panel Tubing cover Powe...

Page 79: ...ally to provide pressure to the system from the low pressure outlet and collect oil in a pan or container Fig 2 The low pressure outlet port is at the Hi side of the left side A faulty outdoor unit ma...

Page 80: ...connector High pressure outlet port for 7 94mm dia connector Gas tube service port for 7 94mm dia connector Nitrogen gas Manifold gauge Lo Hi Packless valve or the like Container Oil balance tube ser...

Page 81: ...led procedures 2 3 Checking the Oil Acceptance rejection criteria for the oil Condition of refrigeration cycle Condition of oil Judgment criteria for changing oil Color Odor Total acid value Hue Norma...

Page 82: ...rs are made Have repairs made as soon as possible 3 2 Manual Backup This backup operation is the conventional method of backup operation It involves disconnecting the failed outdoor unit from the syst...

Page 83: ...ailed outdoor unit Collecting refrigerant in the failed outdoor unit Short circuit the AP pin CN24 on the control PCB of the failed outdoor unit where the service valves are closed then turn the power...

Page 84: ...es To avoid the entry of air into the refrigerant tubing carry out this connection work carefully Fig 3 For detailed procedures such as connecting the refrigerant recovery unit with the recovery cylin...

Page 85: ...connector Gas tube service port for 7 94mm dia connector Low pressure outlet port for 7 94mm dia connector Type 12HP Refrigerant recovery cylinder Refrigerant recovery unit Manifold gauge Lo Hi Liquid...

Page 86: ...ant recovery unit Manifold gauge Lo Hi Liquid tube service port for 7 94mm dia connector Low pressure outlet port for 7 94mm dia connector High pressure outlet port for 7 94mm dia connector Gas tube s...

Page 87: ...y procedures 1 When replacing or repairing a faulty unit let other normal indoor units run excluding indoor unit where refrigerant is recovered Modify power to permit turning off power to refrigerant...

Page 88: ...e for about 5 minutes as described in 4 2 1 Cooling operation for all units fully close the liquid tube ball valve 3 Run the unit in Cooling mode for 10 to 20 minutes more 4 Fully close the gas tube b...

Page 89: ...over the refrigerant from the balance tube Therefore do not operate the balance tube valve CAUTION 4 Turn off power to all equipment in the system Then disconnect the wire RC1 of the terminal TM1 on t...

Page 90: ...outlet port for 7 94mm dia connector Liquid tube service port for 7 94mm dia connector Gas tube service port for 7 94mm dia connector Low pressure outlet port for 7 94mm dia connector High pressure ou...

Page 91: ...nector Gas tube service port for 7 94mm dia connector Low pressure outlet port for 7 94mm dia connector Type 14HP 16HP Refrigerant recovery cylinder Refrigerant recovery unit Manifold gauge Lo Hi High...

Page 92: ...tdoor unit 4 Connect the manifold gauge to the high and low pressure outlet ports Schrader type valves on any outdoor unit Fig 5 5 Connect the manifold gauge valves refrigerant recovery unit and refri...

Page 93: ...ired part such as a newly brazed part and briefly inspect for any leakage If there are any leaks bubbles will show on the tubing surface To continue the air tight check after the brief leak inspection...

Page 94: ...or 7 94mm dia connector High pressure outlet port for 7 94mm dia connector Gas tube service port for 7 94mm dia connector Nitrogen gas Manifold gauge Lo Hi Type 14HP 16HP Liquid tube service port for...

Page 95: ...to the Installation Instructions that came with the outdoor unit Fig 6 d Nitrogen gas Manifold gauge Lo Hi Type 18HP 20HP Liquid tube service port for 7 94mm dia connector Low pressure outlet port for...

Page 96: ...short circuiting the AP pin CN24 and turning on power to the outdoor unit all electronic valves in the outdoor unit are forcibly opened and any remaining nitrogen gas can be recovered Failure to perfo...

Page 97: ...ector High pressure outlet port for 7 94mm dia connector Gas tube service port for 7 94mm dia connector Type 12HP Vacuum pump Manifold gauge Lo Hi Liquid tube service port for 7 94mm dia connector Low...

Page 98: ...nstallation Instructions that came with the outdoor unit Vacuum pump Manifold gauge Lo Hi Liquid tube service port for 7 94mm dia connector Low pressure outlet port for 7 94mm dia connector High press...

Page 99: ...ON 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 vacu...

Page 100: ...UTION 3 Charging compressor oil into outdoor unit Connect the lower valve to the low pressure outlet with Schrader type push to release valve in the outdoor unit to be oil charged and then connect the...

Page 101: ...High pressure outlet port for 7 94mm dia connector Gas tube service port for 7 94mm dia connector Type 12HP Lower valve Manifold gauge Lo Hi DPR Upper valve Close Close Liquid tube service port for 7...

Page 102: ...e Lo Hi DPR Upper valve Close Close Liquid tube service port for 7 94mm dia connector Low pressure outlet port for 7 94mm dia connector High pressure outlet port for 7 94mm dia connector Gas tube serv...

Page 103: ...Oil charging Oil charge completed Refrigerant recovery oil charging tank inside Open Close Close Close No connection Close No connection Open Connect to refrigerant recovery tank Open Open Open Open...

Page 104: ...ort for 7 94mm dia connector Low pressure outlet port for 7 94mm dia connector High pressure outlet port for 7 94mm dia connector Gas tube service port for 7 94mm dia connector Oil balance tube servic...

Page 105: ...he RC connector CN73 3P BLU on the out door unit control PCB of the outdoor unit to be repaired Then start a test run of all units Press and hold the CHECK button for 4 seconds or longer 3 Use the out...

Page 106: ...the unit No setting SW5 3P DIP switch Black on the outdoor unit control PCB is set to No 1 3 Short circuit the MODE pin HEAT side of CN40 on the outdoor unit control PCB of the No 1 unit 4 Short circu...

Page 107: ...Be sure to perform this step CAUTION NOTE To determine the completion of refrigerant recovery follow the instructions that came with the refrigerant recovery unit 8 Open both Hi and Lo side valves on...

Page 108: ...nsulation resistance as required by generally accepted requirements is 1 M JUDGMENT START Is there burning of the failed compressor motor Follow the instructions in 2 Discharging Compressor Oil and dr...

Page 109: ...t or when charging with the same amount of new refrigerant has not been completed but no more refrigerant will enter the unit fully close the high pressure gauge valve on the manifold gauge Next turn...

Page 110: ...ly 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 th...

Page 111: ...ircuit at the AP pin CN24 Then fully open all valves on the gas tube liquid tube and balance tube However leave the balance tube fully closed if only a single outdoor unit is installed 8 If backup ope...

Page 112: ...of all outdoor units where dry cores will be attached then recover the refrigerant from the tubing Be sure that no air enters the tubing at this time 5 As shown in Fig 15 disconnect the tube that runs...

Page 113: ...unit 1 See the section 4 2 3 Refrigerant recovery procedures 2 Indoor unit with no ball valve equipped Perform pump down of the refrigerant from all indoor units and inter unit tubing to the outdoor u...

Page 114: ...nitrogen gas 2 Remove the insulator that the compressor is surrounded 3 Remove the lid on the compressor terminal plate Then disconnect the power cablel and discharge sensor 5 Remove the bolts 3 locat...

Page 115: ...OOR UNIT MAINTENANCE REMOTE CONTROLLER 1 Overview 4 2 2 Functions 4 3 3 Ordinary Display Controls and Functions 4 4 4 Monitoring Operations 4 9 5 Outdoor Unit Alarm History Monitor 4 11 6 Mode Setting...

Page 116: ...door unit maintenance remote controller does not function as an ordinary remote controller It is therefore only used for test runs and during servicing A Service Checker Section CZ RTC4 l The special...

Page 117: ...outdoor units Unit Nos of connected indoor outdoor units Indoor outdoor unit operating status blinks when an alarm occurs Indoor unit thermostat ON Display of individual outdoor unit alarms Total oper...

Page 118: ...t PCB Terminal board l If the communications line in the inter unit control wiring is connected it can be left as is l In case of an independent outdoor unit 1 maintenance remote controller connected...

Page 119: ...heating and cooling operation The display indicates the operating mode of the indoor unit with the lowest unit No l All units test run Operation The Check button can be used to start and stop a test...

Page 120: ...isplay Compressor 1 operating time 0 99999999 hours Compressor 2 operating time 0 99999999 hours Compressor 1 oil level 0 Empty 1 Insufficient 2 Sufficient Compressor 2 oil level 0 Empty 1 Insufficien...

Page 121: ...tly selected XX Outdoor system address on main bus line 1 30 YY Outdoor unit sub bus address 1 8 1 appears when there is only 1 outdoor unit Locations where and are displayed as shown in Fig 1 01 No o...

Page 122: ...press the Flap button n The total compressor operating time is displayed in 1 hour units using 8 digits When the first 4 digits are displayed the top dot of the colon is illuminated Figure A When the...

Page 123: ...lluminates 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...

Page 124: ...A Inverter1 primary current L2 phase A A A A Inverter2 primary current L2 phase Outdoor unit STEP MOV pulse 1 MOV1 STEP MOV pulse 2 MOV2 Inverter2 secondary current Inverter1 actual operating frequenc...

Page 125: ...address Press the button 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...

Page 126: ...and remains lit During this mode is displayed blinking The outdoor unit address display section displays ALL the item code and number DN value in the table and the setting data 6 digits The setting da...

Page 127: ...roller Functions 5 1 5 5 REMOTE CONTROLLER FUNCTIONS 1 Simple Settings Function 5 2 2 Detailed Settings Function 5 8 3 Remote Controller Servicing Functions 5 21 Contents SM830253 00_ 2way7_SM TRSM in...

Page 128: ...e or button 4 Select the Set data by pressing the or button Select one of the Set data by pressing the or button Then press the button 5 Select the Unit no by pressing the or button and press the butt...

Page 129: ...select the address unit No of the indoor unit to set button and 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 4 Pr...

Page 130: ...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 Elec...

Page 131: ...del data Model Filter sign ON time Standard Long life Standard High fouling Standard High fouling 0001 4 Way cassette U1 4 Way cassette 60 60 Y2 2500 1250 0002 2 Way cassette L1 2500 1250 0003 1 Way c...

Page 132: ...ntroller 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 pr...

Page 133: ...F 06 Heating intake temperature shift Shifts the intake temperature during heating Can be set when the body thermostat is used 07 Electric heater installation Set when cost distribution is performed u...

Page 134: ...ed 4 Select the Set data by pressing the or button Select one of the Set data by pressing the or button Then press the button 5 Select the Unit no by pressing the or button and press the button The Ex...

Page 135: ...nit No of the indoor unit to set At this time the fan at the indoor unit begins operating button and If unit No is displayed the same setting will be made for all indoor units 4 Press the temperature...

Page 136: ...s intake temperature 10 C up 0000 Function disabled 0001 Stops automatically 5 minutes after operation starts 0002 Stops automatically 10 minutes after operation starts 0123 Stops automatically 615 mi...

Page 137: ...wer limit at shipment 0019 19 C Lower limit 0029 29 C 0030 30 C Upper limit at shipment Upper limit Heating 0016 16 C Lower limit at shipment 0017 17 C Lower limit 0029 29 C 0030 30 C Upper limit at s...

Page 138: ...ure 26 C Fan output switching 0000 Output linked with fan ON when indoor unit fan is operating 0001 Fan mode operation output Drain pump delayed start time 0000 No delayed start 0001 1 second delayed...

Page 139: ...0059 59 seconds 0060 Continuously ON Repeat timer switching 0000 Function disabled 0001 Function enabled Timer function change prohibit 0000 Function disabled 0001 Function enabled Smudging control 00...

Page 140: ...s 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 incre...

Page 141: ...r OFF reminder or for fire prevention input 31 Ventilation fan operation from remote controller It is possible to install a total heat exchanger and ventilation fan in the system which can be started...

Page 142: ...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 sa...

Page 143: ...ng data Purpose of use names of accessories 0000 1 0001 3 Standard setting at time of shipping High ceiling setting Super long life filter Ammonia deodorant filter 65 by JIS colorimetric method Optica...

Page 144: ...4 Select the Code no by pressing the or button Change the Code no to 5D by pressing the or button or keeping it pressed Detailed settings Unit no Code no Set data 1 0 0 0 1 1 Sel Next 20 30 THU 5D 5...

Page 145: ...of the indoor unit operating 3 Designate the item code by adjusting the Temperature Setting buttons 4 Press the timer time buttons to select the desired setting data For item codes and setting data se...

Page 146: ...d 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 tu...

Page 147: ...re display Temperature display from each sensor 5 Sensor info Servicing check display Alarm history display 6 Service check Simple settings Filter lifetime operating mode priority central control addr...

Page 148: ...troller is connected stops Detailed settings System address indoor unit address central control address and other settings Auto address Auto address setting based on command from the wired remote cont...

Page 149: ...run on the LCD display and press the button Change the display from OFF to ON by pressing the or button Then press the button Maintenance func 1 Outdoor unit error data 2 Service contact 3 RC setting...

Page 150: ...play The temperature cannot be adjusted in Test Run mode This mode places a heavy load on the machines Therefore use it only when performing the test run The test run can be performed using the HEAT C...

Page 151: ...tton Maintenance func 1 Outdoor unit error data 2 Service contact 3 RC setting mode 4 Test run Sel Page Confirm 20 30 THU Maintenance func 5 Sensor info 6 Servicing check 8 Detailed settings Sel Page...

Page 152: ...4 If group control is in effect press the to select the unit to monitor button Press the temperature setting buttons to select the item code to change 5 Press the button to return to normal remote co...

Page 153: ...18 38 58 78 Inverter2 secondary current 19 39 59 79 Inverter1 actual operating frequency 1A 3A 5A 7A MOV pulse 4 MOV4 1B 3B 5B 7B Inverter1 primary current L1 phase 1C 3C 5C 7C Inverter2 primary curr...

Page 154: ...MEMO 5 28 SM830253 00_ 2way7_SM TRSM indb 28 16 08 02 14 00 34...

Page 155: ...tdoor Unit Control Panel LED Display 6 4 3 2WAY Alarm Codes 6 5 4 Blinking Inspection Display 6 26 5 Inspection and Characteristics of Parts 6 27 6 Test Pin 6 30 7 Symptom Thermostat in OFF continues...

Page 156: ...ng number of connected units does not correspond to number set Improper setting Improper setting Improper setting Indoor unit Number of connected indoor units is less than the number set Number of con...

Page 157: ...roup control unalarmed state of indoor units are inoperative Indoor unit communication error of group control wiring P04 P03 P05 P15 P20 P19 P17 P29 P31 P22 Outdoor unit fan motor 2 is unusual P24 Com...

Page 158: ...uccessfully After the power is turned ON and auto address setting is not in progress the number of detected indoor units connected to that system matches the number that was set and regular communicat...

Page 159: ...emperature sensor abnormal TO 6 12 F12 Compressor inlet temperature sensor abnormal SCT 6 12 F14 Supercooling gas temperature sensor abnormal SCG 6 12 F16 High pressure sensor abnormal high load HPS 6...

Page 160: ...ressor 2 discharge temperature error 6 20 P20 High load Forgot to open valves 6 24 P22 Outdoor unit fan1 failure IPM damage overcurrent invertor failure DC fan lock hole IC open phase 6 24 P24 Outdoor...

Page 161: ...tting again Example Notes E12 Auto address setting start is prohibited Auto address setting was started when auto address setting was in progress at another outdoor unit in the same link Auto address...

Page 162: ...er is OFF at all indoor units in the system Check 2 Check whether serial wire is disconnected at the terminal TM1 1 2 3 Check the power at the indoor units Correction Example Notes E20 No indoor units...

Page 163: ...alarm occurs automatically when the set outdoor unit quantity matches the number of outdoor units detected on the outdoor unit main sub control wiring E29 Alarm Alarm code Alarm meaning Alarm conditio...

Page 164: ...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 Outdoor Unit Control PCB An...

Page 165: ...compressor may stop for no apparent reason The purpose of this alarm is to facilitate identification of the problem in this case F06 F23 Alarm Alarm code F06 F23 Alarm meaning F06 Gas temperature sens...

Page 166: ...en circuit A D step is 1014 steps or more Probable cause 1 Sensor malfunction including connector 2 The Outdoor Unit Control PCB malfunction Check 1 Measure the sensor resistance Check that the sensor...

Page 167: ...items are the same as for a high pressure sensor malfunction A normal PCB is needed to determine whether the problem is a PCB failure or a pressure sensor malfunction If an abnormality was found at th...

Page 168: ...The lifetime of the non volatile memory has been reached 3 Non volatile memory is installed incorrectly wrong direction bent pins etc Check 1 Check the non volatile memory on the Outdoor Unit Control...

Page 169: ...t conducting putty is applied 3 Remove the discharge sensor from the sensor holder and expose the sensor to the outside air for approximately 5 minutes Check that the temperature detected by the senso...

Page 170: ...the Outdoor Unit Control PCB and measure the resistance of each wire 3 and between the outdoor unit and earth If this resistance is more than 1M it indicates normal If not replace the sensor Connect...

Page 171: ...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...

Page 172: ...of HIC PCB IPM in the following method If the result of measurement shows the resistance value of the fault diagnosis replace the HIC PCB Right or wrong decision of HIC PCB IPM Measure the resistance...

Page 173: ...rant model is connected 1 A unit that uses R407C refrigerant or a R22 model unit was connected by mistake 1 Check the refrigerant type at the connected unit The outdoor unit maintenance remote control...

Page 174: ...nit After an outdoor unit stops there is the sound of refrigerant flowing into an outdoor unit that was stopped for a long time When an outdoor unit starts after being stopped for a long time the star...

Page 175: ...coil resistance of the expansion valve is several tens of Ohm 12 Check for solenoid valve kit failure Removing a coil that is on will result in a clicking sound Also removing a coil that is off will...

Page 176: ...se solenoid valve kit from a PC has been made Confirmation from the address setting software of a PC Correction P05 P15 Alarm Alarm code P05 P15 Alarm meaning Open phase reversed phase of the compress...

Page 177: ...vercurrent alarm This alarm occurs when current trouble or current detection trouble occur when trouble judgement current is detected in the secondary current When more than the current values shown i...

Page 178: ...sistance value of fault diagnosis Less than 1k 3 Check the fan rotation Check if there is any obstacle affecting fan rotation 4 Check the abonormal fan motor Rotate the fan manually and check whether...

Page 179: ...connection failure miswiring Wiring between the HIC PCB and compressor Check 1 Check the power supply and voltage Check whether the voltage between each of the phases is correct while the compressor i...

Page 180: ...larm history then see the corresponding items Correction Follow the instructions in the corresponding items to correct the trouble Recovery After repairing the malfunctioning locations reset the power...

Page 181: ...When the voltage is normal measure the resistance between each pair of pins on the electronic control valve connector The connector is normal if all results pin 5 pin 1 pin 5 pin 2 pin 5 pin 3 pin 5...

Page 182: ...ction air room temp sensor TA Indoor discharge air temp sensor BL 5 Indoor coil temp sensor E1 E3 40 35 30 25 20 15 10 5 0 20 15 10 5 0 5 10 15 20 8 7 6 5 4 3 2 1 0 20 30 40 50 60 10 55 50 45 40 35 30...

Page 183: ...istance of Compressor Motor 8 Characteristics of Sensor Resistor k Resistor k Outdoor air temp sensor TO Compressor intake temp sensor SCT Temperature C Temperature C Temp sensor at refrigerant gas ou...

Page 184: ...hen turn the power back ON Output is performed in the sequence shown in the table below for 0 5 seconds each Operation Operation Output Relay RY12 4 way valve 20s Relay RY1 Crankcase heater 1 CH1 Outp...

Page 185: ...main control PC board and check alarm messages See operational status 2 2 Yes No 2 2 Discharge temperature is over 80 C in stop mode and does not decrease Connect outdoor maintenance remote controlle...

Page 186: ...MEMO 6 32 SM830253 00_ 2way7_SM TRSM indb 32 16 08 02 14 02 53...

Page 187: ...Outdoor Unit PCB Setting 7 4 4 Auto Address Setting 7 7 5 Remote Controller Test Run Settings 7 15 6 Caution for Pump Down 7 16 7 Self Diagnosis Function Table and Contents of Alarm Display 7 16 2WAY...

Page 188: ...warm to the touch and the crankcase heater around the feet of the compressor should be hot to the touch ON Power must be turned ON at least 5 hours before attempting test run Power mains switch 6 Both...

Page 189: ...or unit P C B OFF Are LEDs 1 and 2 on outdoor unit P C B OFF Does system operate If the terminating resistance pin on outdoor main unit P C B is made link wiring more than 2 refrigerant systems set to...

Page 190: ...ing 3 Main Outdoor Unit PCB Setting LED2 LED1 SW6 SW5 SW7 SW2 SW3 SW4 SW1 CN25 CN40 CN30 CN27 CN22 TM1 CN23 CN24 CN28 CN73 CN69 CN82 CN67 JP12 JP11 CN34 CN33 00_271537_2WAY_Eng indb 47 2015 9 10 16 15...

Page 191: ...units Outdoor unit setting SW6 3P DIP switch 1 unit factory setting 1 ON 2 units 2 ON 3 units 1 2 ON 4 units 3 ON Address setting of main outdoor unit SW5 Unit No setting Address setting of outdoor u...

Page 192: ...rt circuited and pulse signal is given all indoor units operate in the same refrigerant system STOP pin 2P WHT CN28 When short circuited and pulse signal is given all indoor units stop in the same ref...

Page 193: ...goes out and the process is stopped Be sure to perform auto address setting again Auto address setting is completed when LEDs 1 and 2 on outdoor main unit control P C board go out 7 Remote control ope...

Page 194: ...r setting unit 1 Unit number setting unit 2 Set the terminating resistance pin to SHORT side CN67 Unit number setting unit 3 Inter outdoor unit control wiring Inter outdoor unit control wiring Remote...

Page 195: ...OFF 3 Check that the refrigerant system address Rotary switch SW1 on outdoor main unit control P C board in 1 refrigerant system is set to 1 and the Dip switch SW2 is set to 0 at shipment 1 2 ON ON OF...

Page 196: ...refrigerant system simultaneously Communication for auto address setting begins and the compressor is started and auto address setting in heating mode begins All indoor units can also be operated To...

Page 197: ...in each refrigerant system It is impossible to perform auto address setting in a multiple refrigerant system simultaneously Communication for auto address setting begins and the compressor starts and...

Page 198: ...isappears when auto address setting is completed 5 Repeat the same steps to perform auto address setting for each successive system Auto Address Setting from the High spec Wired Remote Controller CZ R...

Page 199: ...ognized there are inconsistencies between the number of indoor units and setting number of indoor units Under auto address setting Alternately Auto address setting completed There are inconsistencies...

Page 200: ...a 01 3 1 0001 Sel Next 20 30 THU The indoor unit fan operates only at the selected indoor unit START 20 30 THU Indoor unit address Number changes to indicate which indoor unit is currently selected If...

Page 201: ...ART 20 30 THU CZ RTC4 Timer remote controller 1 Press the remote controller button for 4 seconds or longer Then press the button appears on the LCD display while the test run is in progress The temper...

Page 202: ...unit control P C board and make confirmation Self Diagnosis Function Table Cause and countermeasure against the symptom of auto address failure Symptom Cause and countermeasure When turning ON power t...

Page 203: ...Ds 1 and 2 indicators on outdoor main unit control P C board blink alternately 2 If there is an error at the inter unit control wiring of the remote controller when in the indoor unit group control ad...

Page 204: ...rent values Overcurrent H03 Compressor 1 CT sensor disconnected short circuit H05 Compressor 1 discharge temperature sensor disconnected H06 Low pressure abnormal lowering H07 Oil loss error H08 Oil s...

Page 205: ...t made F01 Indoor unit thermistor failure Heat exchanger temperature sensor E1 F02 Water heat exchanger temperature sensor E2 chiller F03 Heat exchanger temperature sensor E3 F10 Inlet temperature sen...

Page 206: ...ocations described above make them invalid OPEN side It is prohibited making more than 3 locations of terminating resistance valid Since the use of linking the sub outdoor units of VRF systems is not...

Page 207: ...201609 SM830253 00_ 2way7_SM TRSM indb 1 16 07 28 11 15 18...

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Panasonic U-8ME2E8, Service Manual & Test Run Service Manual

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