Panasonic U-120ME2U9 Installation Instructions Manual Download Page 39

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Charging additional refrigerant

CAUTION

Use a cylinder designed for use with
R410A respectively.

●

Charging additional refrigerant (calculated from the liquid

tube length as shown in Section “1-8. Additional Refrigerant
Charge”) using the liquid tube service valve.

●

Use a balance to measure the refrigerant accurately.

●

If the additional refrigerant charge amount cannot be charged

at once, charge the remaining refrigerant in liquid form by
using the gas tube service valve with the system in cooling

operation mode at the time of test run.

Finishing the job

(1) With a hex wrench, turn the liquid tube service valve stem

counter-clockwise to fully open the valve.

CAUTION

To avoid gas from leaking when
removing the charge hose, make
sure the stem of the gas tube is
turned all the way out (“BACK
SEAT” position).

(2) Turn the gas tube service valve stem counter-clockwise to

fully open the valve.

(3) Loosen the charge hose connected to the gas tube service

port (5/16" (7.94mm)) slightly to release the pressure, then

remove the hose.

(4) Replace the 1/4" (6.35mm) flare nut and its bonnet on the

gas tube service port and fasten the flare nut securely with
an adjustable wrench or box wrench.

This process is very important to prevent gas from leaking

from the system.

(5) Replace the valve caps at both gas and liquid service valves

and fasten them securely.

This completes air purging with a vacuum pump.
The air conditioner is now ready for a test run.

Gas

tube

Liquid
tube

Balance
tube

Open

Outdoor unit

Pressure
gauge

Gas

tube

Liquid
tube

Balance
tube

Valve

Open

Outdoor unit

R410A

Liquid

Manifold valve

00_302411_EN.indd 39

2018/7/4 13:27:51

Summary of Contents for U-120ME2U9

Page 1: ...MD1U6 S 09MD1U6 S 12MD1U6 F2 Concealed Duct Medium Static S 07MF2U6 S 09MF2U6 S 12MF2U6 S 15MF2U6 S 18MF2U6 S 24MF2U6 S 36MF2U6 S 48MF2U6 S 54MF2U6 M2 Concealed Duct Low Static S 07MM2U6 S 09MM2U6 S 12MM2U6 S 15MM2U6 S 18MM2U6 E1 Concealed Duct High Static S 36ME1U6 S 48ME1U6 T2 Ceiling S 12MT2U6 S 18MT2U6 S 24MT2U6 K2 Wall Mounted S 07MK2U6 S 09MK2U6 S 12MK2U6 S 18MK2U6 S 24MK2U6 P1 Floor Standin...

Page 2: ...with Earth Leakage Circuit Breaker ELCB or Residual Current Device RCD Otherwise it may cause electrical shock and fire in case of equipment breakdown or insulation breakdown When Transporting Be careful when picking up and moving the indoor and outdoor units Get a partner to help and bend your knees when lifting to reduce strain on your back Sharp edges or thin aluminum fins on the air conditione...

Page 3: ...e injured and the unit may be damaged Check of Density Limit The room in which the air conditioner is to be installed requires a design that in the event of refrigerant gas leaking out its density will not exceed a set limit The refrigerant R410A which is used in the air conditioner is safe without the toxicity or combustibility of ammonia and is not restricted by laws imposed to protect the ozone...

Page 4: ...ater and other impurities becomes more important than ever 2 Be sure to recharge the refrigerant only in liquid form 2 1 Since R410A is a non azeotrope recharging the refrigerant in gas form can lower performance and cause defects in the unit 2 2 Since refrigerant composition changes and performance decreases when gas leaks collect the remaining refrigerant and recharge the required total amount o...

Page 5: ...r parts are different 2 Existing tubing cannot be used especially R22 Completely cleaning out residual refrigerating machine oil is impossible even by flushing 3 Refrigerating machine oil differs R22 Since R22 refrigerating machine oil is mineral oil it does not dissolve in R410A Therefore refrigerating machine oil discharged from the compressor can cause compressor damage R22 refrigerating machin...

Page 6: ... Installing in Heavy Snow Areas 2 5 Dimensions of Wind Ducting 2 6 Dimensions of Snow Ducting 3 HOW TO INSTALL THE OUTDOOR UNIT 23 3 1 Transporting 3 2 Installing the Outdoor Unit 3 3 Routing the Tubing 3 4 Prepare the Tubing 3 5 Connect the Tubing 4 ELECTRICAL WIRING 28 4 1 General Precautions on Wiring 4 2 Recommended Wire Length and Wire Diameter for Power Supply System 4 3 Wiring System Diagra...

Page 7: ... Electrical Wiring for details CAUTION CAUTION Check local electrical codes and regulations before obtaining wire Also check any specified instructions or limitations 1 4 Additional Materials Required for Installation 1 Refrigeration armored tape 2 Insulated staples or clamps for connecting wire See your local codes 3 Putty 4 Refrigeration tubing lubricant 5 Clamps or saddles to secure refrigerant...

Page 8: ...rom the table of refrigerant tubing sizes Table 1 9 on the second following page 3 If the longest main tubing length LM exceeds 164 ft 50m increase the main tube size at the portion before 164 ft 50m by 1 rank for the gas tubes Use a field supply reducer For the portion that exceeds 164 ft 50m set based on the main tube sizes LA listed in the table on the following page 4 If the tubing length mark...

Page 9: ... 30 0 143 300 42 0 178 800 52 4 238 900 70 0 340 000 99 6 Over BTU h kW 24 200 7 09 54 600 16 0 76 800 22 5 102 400 30 0 143 300 42 0 178 800 52 4 238 900 70 0 340 000 99 6 Tubing size Gas tubing ø1 2 ø12 7 ø5 8 ø15 88 ø3 4 ø19 05 ø7 8 ø22 22 ø1 1 8 ø28 58 ø1 1 8 ø28 58 ø1 1 8 ø28 58 ø1 3 8 ø34 92 ø1 5 8 ø41 28 Liquid tubing ø3 8 ø9 52 ø3 8 ø9 52 ø3 8 ø9 52 ø3 8 ø9 52 ø1 2 ø12 7 ø1 2 ø12 7 ø5 8 ø1...

Page 10: ...e Additional refrigerant charge amount is calculated from the liquid tubing total length combination number of outdoor unit and refrigerant amount according to all indoor unit cooling capacity Required amount of additional refrigerant charge Necessary amount of additional refrigerant charge per ft m of each size of liquid tube x its tube length Necessary amount of additional refrigerant charge per...

Page 11: ...ula should not exceed the maximum allowable values Table 1 12 Total refrigerant amount Refrigerant charge amount at shipment for outdoor unit Necessary amount of additional refrigerant charge per ft or per meter according to liquid tubing size Necessary amount of additional refrigerant charge per outdoor unit Necessary amount of additional refrigerant charge for all indoor unit cooling capacity WA...

Page 12: ...en connecting to B Horizontal A D B 15 90 Straight tubing length over 8 in 200mm Arrow view D 15 90 15 30 15 90 15 30 Straight tubing length over 8 in 200mm Branch tubing angle Horizontal Straight tubing length over 8 in 200mm or 0 30 Branch tubing angle Horizontal Vertical Upward Vertical Vertical Vertical Vertical Downward 15 90 Vertical Straight tubing length over 8 in 200mm 15 90 Straight tubi...

Page 13: ...rt A Part B Part C Part D Part E Part F Part G Part H Part I in mm ø1 3 8 ø34 92 ø1 1 4 ø31 75 ø1 1 8 ø28 58 ø1 ø25 4 ø7 8 ø22 22 ø3 4 ø19 05 ø5 8 ø15 88 ø1 2 ø12 7 ø3 8 ø9 52 2 CZ P1350PJ1U For outdoor unit Capacity after distribution joint is greater than 232 000 BTU h 68 0 kW 175 135 110 97 4 31 64 114 2 53 64 72 B F H I H I G G G B B A A 6 57 64 5 5 16 4 21 64 3 13 16 C C C D D D E F A Example...

Page 14: ... Part A Part B Part C Part D Part E Part F Part G Part H in mm ø1 1 8 ø28 58 ø1 ø25 4 ø7 8 ø22 22 ø3 4 ø19 05 ø5 8 ø15 88 ø1 2 ø12 7 ø3 8 ø9 52 ø1 4 ø6 35 5 CZ P1350BK1U Use For indoor unit Capacity after distribution joint is greater than 232 000 BTU h 68 0 kW 175 135 4 21 64 110 97 3 13 16 4 31 64 114 2 53 64 72 6 57 64 5 5 16 H I J C D E F G H G F F H G G B C D B B A C D A A Unit in mm Gas tubi...

Page 15: ...e leave the valves fully closed Charge with R410A refrigerant in liquid form With R410A refrigerant charge while adjusting the amount being fed a little at a time in order to prevent liquid refrigerant from backing up l After charging is completed turn all valves to the fully open position l Replace the tubing covers as they were before CAUTION CAUTION 1 R410A additional charging absolutely must b...

Page 16: ...tdoor unit combination number 141 oz 4 000g Note 3 Amount of additional charge for all indoor unit cooling capacity 196 oz 5 560g Total of additional refrigerant charge amount 755 oz 21 429g Therefore the total of additional refrigerant charge amount reaches 755 oz 21 429g l Obtain overall refrigerant charge amount Overall refrigerant charge amount of the system indicates the calculated value show...

Page 17: ... ft 1500mm Over 2 3 8 in 60mm Wall height Unlimited Example 2 units installation For other installation follow the standards of combination installation CAUTION CAUTION l Leave space open above the unit l Construct louvers or other openings in the wall if necessary to ensure adequate ventilation NOTE l Do not do any wiring or tubing within 1 ft 300mm of the front panel because this space is needed...

Page 18: ... proper countermeasures are not taken l The fan in the outdoor unit may stop running causing the unit to be damaged l There may be no air flow l The tubing may freeze and burst l The condenser pressure may drop because of strong wind and the indoor unit may freeze 2 4 Precautions When Installing in Heavy Snow Areas a The platform should be higher than the maximum snow depth b The 2 anchoring feet ...

Page 19: ...9 31 64 1003 5 64 2 3 64 1 30 35 64 29 29 64 748 30 5 16 770 770 3 64 1 5 64 2 unit in mm Top view Top view Air direction Rear direction Air direction Front direction Front view Right side view Front view Right side view 101 3 16 2570 28 55 64 733 101 3 16 2570 28 55 64 733 39 31 64 1003 39 31 64 1003 5 64 2 5 64 2 3 64 1 3 64 1 46 29 64 1180 46 29 64 1180 43 13 16 1113 45 19 32 1158 45 19 32 1158...

Page 20: ...4 31 64 2 400 3 15 64 82 29 9 64 740 30 35 64 776 29 29 64 748 27 43 64 703 B Installation hole pitch 7 3 32 180 6 27 32 174 105 23 64 2 676 8 17 64 210 103 15 16 2 640 7 61 64 202 29 9 64 740 30 35 64 776 29 29 64 748 27 43 64 703 C Installation hole pitch 7 3 32 180 6 27 32 174 105 23 64 2 676 8 17 64 210 103 15 16 2 640 7 61 64 202 29 9 64 740 30 35 64 776 29 29 64 748 27 43 64 703 Sample of mi...

Page 21: ... 64 2 3 64 1 68 13 64 1748 30 5 16 770 478 18 13 16 25 25 32 655 57 9 16 1462 unit in mm Top view Top view Air direction Rear direction Air direction Front direction Front view Right side view Front view Right side view 18 13 16 478 19 1 4 489 19 1 4 489 19 1 4 489 42 1 4 1073 34 21 64 872 34 21 64 872 2 29 32 74 1073 42 1 4 39 31 64 1003 3 64 1 5 64 2 45 19 32 1158 46 11 16 1186 39 31 64 1003 5 6...

Page 22: ...w proof ducting Top view C 28 47 64 730 Installation hole pitch B 28 47 64 730 Installation hole pitch downward tubing direction A 37 61 64 964 Installation hole pitch forward tubing direction Front view Right side view According to the installation site you may choose the setting position in the depth direction of the anchor bolt from A B or C Sample of small size models 3 units D E F G H I A Ins...

Page 23: ... bolts 15 32 or M12 or similar to securely anchor the unit in place 2 Make sure the rubber vibration insulator and platform extend to the inside of the legs In addition the washers used to anchor the unit from the top must be larger than the installation anchor holes A 37 61 64 964 B 28 47 64 730 C 28 47 64 730 F D D D D D D E E D H D D E E G Type 120 144 Vibration insulator Vibration insulator Vi...

Page 24: ...ng is routed out from the front B 28 47 64 730 Installation hole pitch The tubing is routed out from the bottom C 28 47 64 730 Installation hole pitch For type 72 96 Front Front Tubing cover Tubing cover Tubing cover Slit part Slit hole Remove 4 screws Indentation 5 locations Use cutting pliers or similar tool to cut cover out Remove 10 panel screws from front panel Remove 8 panel screws from fron...

Page 25: ...nt tubing Existing tubing can be used Tubing size in mm Material O Material O Outer diameter Wall thickness Outer diameter Wall thickness 1 4 6 35 0 025 0 635 7 8 22 22 0 045 1 143 3 8 9 52 0 030 0 762 1 1 8 28 58 0 050 1 27 1 2 12 7 0 035 0 889 1 3 8 34 92 0 055 1 397 5 8 15 88 0 040 1 016 1 5 8 41 28 0 060 1 524 3 4 19 05 0 042 1 0668 3 5 Connect the Tubing l Use the supplied connector tubing Se...

Page 26: ...17 Flare nut ø1 4 6 35 Flare nut ø1 2 12 7 For type 96 Unit in mm Service port cap width 43 64 17 Valve cap width 3 4 19 Valve cap width 35 64 14 Valve cap width 43 64 17 Service port cap width 43 64 17 Service port cap width 43 64 17 Flare nut ø1 4 6 35 Flare nut ø3 8 9 52 Do not apply an adjustable wrench to the hexagonal part Use two adjustable wrenches as shown in the figure when removing the ...

Page 27: ...e used 2 Use a pressure reducing valve on the nitrogen tank 3 Do not use agents intended to prevent the formation of oxide film They will adversely affect the refrigeration oil and may cause equipment failure 4 The balance tube is not used if only 1 outdoor unit is installed Use the unit in the same conditions as when it was shipped from the factory Work method Pressure reducing valve regulator Fi...

Page 28: ...or field wiring rules please refer to your LOCAL ELECTRICAL CODES before beginning You must ensure that installation complies with all relevant rules and regulations 8 To prevent malfunction of the air conditioner caused by electrical noise care must be taken when wiring as follows l The remote control wiring and the inter unit control wiring should be wired apart from the inter unit power wiring ...

Page 29: ...door unit No n WHT BLK Ground Power supply 208 230V 60Hz 1 PH Power supply 208 230V 60Hz 1 PH Power supply 208 230V 60Hz 1 PH Power supply 208 230V 60Hz 3 PH Power supply 208 230V 60Hz 3 PH Power supply 460V 60Hz 3 PH Power supply 460V 60Hz 3 PH Disconnect switch Field Supply NOTE Disconnect Switch may be needed by the National Local code Remote Controller Remote Controller Indoor unit No 1 Indoor...

Page 30: ...nit Indoor unit Indoor unit Indoor unit Outdoor unit Outdoor unit Prohibited Prohibited 3 Do not install inter unit control wiring such as star branch wiring Star branch wiring causes mis address setting Outdoor unit Indoor unit Indoor unit Indoor unit Indoor unit NO Branch point 4 If branching the inter unit control wiring the number of branch points should be 16 or fewer Outdoor unit Outdoor uni...

Page 31: ...hecking voltage of terminal board Check if the wiring AC200V or more is connected to the inter unit control wiring connection terminal board First turn off the power and then proceed the work If AC200V or higher voltage is mistakenly applied to the P C board the fuse FUSE3 0 4A of outdoor control P C board is broken and the P C board will be protected U 72ME2U9 U 96ME2U9 U 120ME2U9 U 144ME2U9 In t...

Page 32: ...minal board 1 Inter outdoor unit control wiring 1 2 2P terminal board 1 Type 120 144 Type 120 144 Tightening torque lbs inch N m 1 11 3 1 25 0 25 2 55 2 6 2 0 2 3 73 4 8 2 0 4 U 72ME2U9 U 96ME2U9 U 120ME2U9 U 144ME2U9 CR 72ME2U94 ACXA73 03280 Jumper JP11 Fuse FUSE3 EMG CN69 2P connector BRN U 72ME2U94 U 96ME2U94 U 120ME2U94 U 144ME2U94 In this case replace the pins 1 and 2 of the 2P connector BRN ...

Page 33: ... use waterproof conduit for electrical wiring to the outdoor unit Protective structure is necessary to avoid raindrops through wiring ports Hollow to cut out openings for wiring ports on the panel with a jigsaw Unit in mm U 72ME2U94 U 96ME2U94 U 120ME2U94 U 144ME2U94 P C board P C board Inter unit control wiring U1 U2 4P terminal board 1 Inter outdoor unit control wiring 1 2 4P terminal board 1 El...

Page 34: ...mmended to cut approx 1 2 ft 0 3 0 6m longer than the tubing length you estimate 2 Remove burrs at the end of the copper tube with a tube reamer or file This process is important and should be done carefully to make a good flare Deburring Before After NOTE When reaming hold the tube end downward and be sure that no copper scraps fall into the tube Copper tubing Reamer 3 Remove the flare nut from t...

Page 35: ...ide tubing 2 To fasten the flare nuts apply specified torque as at right l When removing the flare nuts from the tubing connections or when tightening them after connecting the tubing be sure to use 2 adjustable wrenches or spanners as shown If the flare nuts are over tightened the flare may be damaged which could result refrigerant leakage and cause in injury or asphyxiation to room occupants l F...

Page 36: ...e gap at the union with the supplied black insulation tape Finally fasten the insulator at both ends with the supplied vinyl clamps Sealer supplied Flare nut Unit side insulator Flare insulator supplied Vinyl clamps supplied Tube insulator not supplied Heat resistant 248 F 120 C or above Insulation tape white supplied 5 4 Taping the Tubes 1 At this time the refrigerant tubes and electrical wiring ...

Page 37: ...ves on the outdoor unit closed remove the 5 16 7 94mm flare nut and its bonnet on the gas tube service valve Save for reuse 2 Attach a manifold valve with pressure gauges and dry nitrogen gas cylinder to this service port with charge hoses The balance tube leak test is not necessary if only 1 outdoor unit is installed CAUTION CAUTION Use a manifold valve for air purging If it is not available use ...

Page 38: ...nit Confirm that the Lo knob of the manifold valve is open Then run the vacuum pump The operation time for evacuation varies with the tubing length and capacity of the pump Evacuation is not necessary for the balance tube if only 1 outdoor unit is installed NOTE The vacuum condition should be less than 14 7 psig 0 1MPa 755 mmHg 5 Torr 2 When the desired vacuum is reached close the Lo knob of the m...

Page 39: ...sure the stem of the gas tube is turned all the way out BACK SEAT position 2 Turn the gas tube service valve stem counter clockwise to fully open the valve 3 Loosen the charge hose connected to the gas tube service port 5 16 7 94mm slightly to release the pressure then remove the hose 4 Replace the 1 4 6 35mm flare nut and its bonnet on the gas tube service port and fasten the flare nut securely w...

Page 40: ...e compressor should be 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 the gas and liquid tube service valves are open If not open them now Gas tube Balance tube Liquid tube 7 Request that the customer be present for the trial run Explain the cont...

Page 41: ...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 OPEN side excepting the nearest outdoor unit and the farthest outdoor unit from the central controller Are indoor and outdoor control wires connected to a multiple refrigerant system Is it possible t...

Page 42: ...N28 CN24 CN40 CN33 CN34 7 3 Main Outdoor Unit PCB Setting U 72ME2U9 U 96ME2U9 SHORT OPEN CN67 CR 72MF2U9 A748186 COOL SW1 SW2 SW3 SW4 SW6 SW5 HEAT A ADD MODE R C ADD NO OF I U ON ON OFF OFF ON OFF ON OFF NO OF O U O U ADD SW5 SW4 CN24 SW6 CN23 CN34 CN27 SW3 CN30 CN28 CN40 SW2 SW1 CN33 CN73 Terminating resistance pin Terminating resistance pin U 120ME2U9 U 144ME2U9 00_302411_EN indd 42 2018 7 4 13 ...

Page 43: ...43 CN73 CN34 CN33 SW5 SW6 SW4 SW3 SW1 SW2 CN24 CN40 CN30 CN28 CN27 CN23 Terminating resistance pin U 72ME2U94 U 96ME2U94 U 120ME2U94 U 144ME2U94 00_302411_EN indd 43 2018 7 4 13 27 56 ...

Page 44: ... ON 2 1 3 ON ON OFF 1 Set to 1 21 units 2 ON 1 2 3 ON ON OFF 1 Set to 1 31 units 3 ON 3 2 1 ON ON OFF 1 Set to 1 40 units 1 3 ON 1 2 3 ON ON OFF 0 Set to 0 58 units 2 3 ON 1 2 3 ON ON OFF 8 Set to 8 64 units All ON 1 2 3 ON ON OFF 4 Set to 4 l Sample Setting system address Necessary when link wiring established SW2 SW1 System address number System address SW2 2P Dip switch black System address SW1...

Page 45: ...begins If the remote controller is connected in test run mode it is automatically cancelled after 1 hour Also if short circuit is cancelled test run mode is cancelled RC plug 3P BLU CN73 Connects to outdoor unit maintenance remote controller and content of alarm message will be checked RUN pin 2P WHT CN27 When short circuited and pulse signal is given all indoor units operate in the same refrigera...

Page 46: ...opped 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 operation is now available When auto address setting is controlled by the remote controller perform auto address setting by the remote controller after step 5 described above l See to section Auto Address Setting from Remote Controll...

Page 47: ...t number 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 control communication wiring Outdoor unit system 1 Inter unit control wiring Inter unit control wiring Remote Controller Indoor unit Inter unit control wiring Central Controller Unit 1 setting ...

Page 48: ...Be sure to perform auto address setting again Auto address setting is completed when the compressor stops and LEDs 1 and 2 on outdoor main unit control P C board go out 7 Turn ON power to indoor and outdoor units only for another refrigerant system and repeat steps 1 to 5 described above Complete auto address setting for each refrigerant system 8 Remote control operation is now available When perf...

Page 49: ...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 cancel again short circuit the A ADD pin CN30 for over 1 second long and then open circuit LEDs 1 and 2 that indicate auto address setting is in progress go out and that process is stopped Be sure to perform auto ...

Page 50: ...tem 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 auto address setting in cooling mode begins All indoor units can also be operated To cancel again short circuit the A ADD pin CN30 for over 1 second long and then open circuit LEDs 1 and 2 that indicate auto address setting...

Page 51: ...setting is completed 5 Repeat the same steps to perform auto address setting for each successive system 1 Keep pressing the and buttons simultaneously for 4 or more seconds The Maintenance func screen appears on the LCD display 2 Press the or button to see each menu If you wish to see the next screen instantly press the or button Select 9 Auto address on the LCD display and press the button Mainte...

Page 52: ...e number of indoor units and setting number of indoor units Under auto address setting Alternately Auto address setting completed There are inconsistencies between the number of indoor units and setting number of indoor units at the time of auto address setting Simultaneously See the section 7 8 Self Diagnosis Function Table and Contents of Alarm Display Alternating Display of remote controller CZ...

Page 53: ...ger simple settings mode 2 The address is displayed for the indoor unit that is connected to the remote controller Only the address of the indoor unit that is connected to the remote controller can be checked 3 Press the button again to return to normal remote controller mode CZ RTC5A High spec wired remote controller 1 Keep pressing the and buttons simultaneously for 4 or more seconds The Mainten...

Page 54: ...imer 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 temperature cannot be adjusted when in Test Run mode This mode places a heavy load on the machines Therefore use it only when performing the test run 2 The test run can be performed using the HEAT COOL or FAN operation modes NOTE...

Page 55: ...splay appears Are remote control wiring and inter unit control wiring connected properly Is indoor unit turned ON power Auto address setting begins but finishes improperly Symptom Cause and countermeasure Soon after a few seconds or after a few minutes the alarm content is displayed on the remote controller See Contents of Alarm Display and make a correction After a few minutes when auto address s...

Page 56: ...nter unit control wiring of the remote controller when in the indoor unit group control address setting may not occasionally be made although under setting is displayed 3 Although the alarm E15 and E16 are displayed addresses will be installed in the recognized indoor units The installed addresses can be checked by the remote controller See the section Checking the indoor unit address When operati...

Page 57: ...SCG F16 High pressure sensor of the outdoor unit has failure HPS F17 Low pressure sensor of the outdoor unit has failure LPS F23 EXG2 thermistor at the gas side of 2nd heat exchanger of the outdoor unit has failure EXG2 F24 EXL2 thermistor at the liquid side of 2nd heat exchanger of the outdoor unit has failure EXL2 F29 EEPROM on indoor unit PCB has failure F31 EEPROM on outdoor unit PCB has failu...

Page 58: ...atch with the outdoor unit model Multi split mini split L03 Two or more indoor units are set as main in group control L05 Two or more indoor units are set as priority indoor unit L06 Two or more indoor units are set as priority indoor unit L07 Group control wiring is detected for indoor unit set as individual control L08 Indoor unit address is not set L09 Capacity setting of indoor unit is not cor...

Page 59: ...n indoor PCB for refrigerant detector P03 Protective device in outdoor unit is activated 1st compressor discharge temperature too high P04 Protection device activated High pressure switch 63PH 63PH1 or 63PH2 or compressor thermal protector 49C1 49C2 P05 Missing phase in power input is detected at HIC for 1st compressor P15 Missing phase in power input is detected at HIC for 2nd compressor P16 Over...

Page 60: ...ce or peripheral equipment adjustment of terminating resistance pin is necessary Although the connection is not made confirmation is necessary for VRF systems In the case of a refrigerant system the terminating resistance pin for this inter unit control wiring S LINK wiring is one location See the section 7 5 Auto Address Setting For 2 or more refrigerant systems 2 locations should be valid SHORT ...

Page 61: ...61 NOTE 00_302411_EN indd 61 2018 7 4 13 28 03 ...

Page 62: ...62 NOTE 00_302411_EN indd 62 2018 7 4 13 28 03 ...

Page 63: ...63 NOTE 00_302411_EN indd 63 2018 7 4 13 28 03 ...

Page 64: ...ACXF60 18511 DC0314 30718 Printed in China 85464369760022 00_302411_EN indd 64 2018 7 4 13 28 04 ...

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Panasonic U-120ME2U9, Installation Instructions Manual

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