Mitsubishi Electric CMB-PW202V-J Page 20 Service Handbook Download

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Read Before Servicing ]

- 11 -

HWE09070

7. Notes

To evacuate air from the entire system

Applying a vacuum through the check joints at the refrigerant service valve on the high and low pressure sides (BV1

and 2) is not enough to attain the desired vacuum pressure.

Be sure to apply a vacuum through the check joints at the refrigerant service valve on the high and low pressure

sides (BV1 and 2) and also through the check joints on the high and low pressure sides (CJ1 and 2).

To evacuate air only from the outdoor units

Apply a vacuum through the check joints on the high and low pressure sides (CJ1, and 2).

To evacuate air from the indoor units and extension pipes

Apply a vacuum through the check joints at the refrigerant service valve on the high and low pressure sides (BV1

and 2).

Summary of Contents for CMB-PW202V-J

Page 1: ...Service Handbook AIR CONDITIONERS MODEL CMB PW202V J ...

Page 2: ...or fixed cables may produce heat and start a fire Take appropriate safety measures against strong winds and earthquakes to prevent the unit from falling If the unit is not installed properly the unit may fall and cause serious injury to the person or damage to the unit Do not make any modifications or alterations to the unit Consult your dealer for repair Improper repair may result in water leakag...

Page 3: ...er leakage electric shock and or fire After completing the service work check for a gas leak If leaked refrigerant is exposed to a heat source such as a fan heater stove or electric grill poisonous gases may be produced Do not try to defeat the safety features of the unit Forced operation of the pressure switch or the temperature switch by defeating the safety features of these devices or the use ...

Page 4: ...igerant is charged into the system the com position of the refrigerant in the cylinder will change and may result in performance loss Use a vacuum pump with a reverse flow check valve If a vacuum pump that is not equipped with a reverse flow check valve is used the vacuum pump oil may flow into the refrigerant cycle and cause the refrigerating machine oil to deteriorate Prepare tools for exclusive...

Page 5: ... take appropriate measures to reduce noise interference High frequency medical equipment may interfere with the normal operation of the air conditioner or vice versa Do not install the unit on or over things that cannot get wet When the humidity level exceeds 80 or if the drainage system is clogged the indoor unit may drip water Drain wa ter is also discharged from the outdoor unit Install a centr...

Page 6: ...ires or copper wires may result in malfunctions smoke and or fire Do not spray water on the air conditioner or immerse the air conditioner in water Otherwise electric shock and or fire may result When handling units always wear protective gloves to protect your hands from metal parts and high tempera ture parts Periodically check the installation base for damage If the unit is left on a damaged pl...

Page 7: ...of the unit such as pipes and compressor may be either very cold or hot depending on the state of the refrigerant in the unit at the time To reduce the risk of frost bites and burns do not touch these parts with bare hands Do not operate the unit without panels and safety guards Rotating high temperature or high voltage parts on the unit pose a risk of burns and or electric shock Do not turn off t...

Page 8: ...th 23 III WCB Components 1 WCB Components 29 2 Control Box of the WCB 30 3 WCB Circuit Board 31 IV Electrical Wiring Diagram 1 Electrical Wiring Diagram of the WCB 35 V Refrigerant Circuit 1 Refrigerant Circuit Diagram 39 2 Principal Parts and Functions 40 VI Control 1 Functions and Factory Settings of the Dipswitches 43 2 Controlling WCB 44 3 Operation Flow Chart 46 VII Test Run Mode 1 Items to b...

Page 9: ...HWE09070 GB ...

Page 10: ...Materials 5 4 Storage of Piping 7 5 Pipe Processing 7 6 Brazing 8 7 Air Tightness Test 9 8 Vacuum Drying Evacuation 10 9 Refrigerant Charging 12 10 Remedies to be taken in case of a Refrigerant Leak 12 11 Characteristics of the Conventional and the New Refrigerants 13 12 Notes on Refrigerating Machine Oil 14 ...

Page 11: ... 2 ...

Page 12: ...e of tools page 4 5 Verification of the connecting pipes Verify the type of refrigerant used for the unit to be moved or replaced Use refrigerant pipes made of phosphorus deoxidized copper Keep the inner and outer surfaces of the pipes clean and free of such contaminants as sulfur oxides dust dirt shaving particles oil and water These types of contaminants inside the refrigerant pipes may cause th...

Page 13: ...he refrigerant type is indicated The cylinder is pink Charging Port on the Refrigerant Cylinder Refrigerant charging The charge port diameter is larger than that of the current port Flare Nut Connection of the unit with the pipes Use Type 2 Flare nuts Tools Materials Use Notes Gas Leak Detector Gas leak detection The ones for use with HFC refrigerant may be used Vacuum Pump Vacuum drying May be us...

Page 14: ...stem that uses R410A use pipes that are made with 1 2H material Drawn unless the pipe diameter is at least ø19 05 3 4 and the radial thickness is at least 1 2t The figures in the radial thickness column are based on the Japanese standards and provided only as a reference Use pipes that meet the local standards O material Annealed Soft copper pipes annealed copper pipes They can easily be bent with...

Page 15: ...of the pipes must be between 1 0 and 1 5 mm For margin adjustment a copper pipe gauge is necessary 6 Flare nut The flare nut type has been changed to increase the strength The size of some of the flare nuts have also been changed The figures in the radial thickness column are based on the Japanese standards and provided only as a reference Use pipes that meet the local standards Flare processing d...

Page 16: ...brazing Keep elbow pipes and T joints in plastic bags The new refrigerator oil is 10 times as hygroscopic as the conventional refrigerating machine oil such as Suniso and if not handled with care could easily introduce moisture into the system Keep moisture out of the pipes for it will cause the oil to deteriorate and cause a compressor failure 5 Pipe Processing Use a small amount of ester oil eth...

Page 17: ...pper pipes or between a copper pipe and copper coupling If installed refrigerant pipes are not immediately connected to the equipment then braze and seal both ends 2 Reasons The new refrigerating machine oil is 10 times as hygroscopic as the conventional oil and is more likely to cause unit failure if water infiltrates into the system Flux generally contains chloride Residual flux in the refrigera...

Page 18: ...ount Refrigerant R410A must be charged in its liquid state vs gaseous state 2 Reasons Oxygen if used for an air tightness test poses a risk of explosion Only use nitrogen to check air tightness Refrigerant R410A must be charged in its liquid state If gaseous refrigerant in the cylinder is drawn out first the composition of the remaining refrigerant in the cylinder will change and become unsuitable...

Page 19: ...rough vacuum drying re moves moisture in the pipes Verify that the vacuum degree has not risen by more than 1Torr 130Pa 1hour after evacuation A rise by less than 1Torr 130Pa is acceptable If the vacuum is lost by more than 1Torr 130Pa conduct evacuation following the instructions in section 6 Special vacuum drying 5 Procedures for stopping vacuum pump To prevent the reverse flow of vacuum pump oi...

Page 20: ... through the check joints at the refrigerant service valve on the high and low pressure sides BV1 and 2 and also through the check joints on the high and low pressure sides CJ1 and 2 To evacuate air only from the outdoor units Apply a vacuum through the check joints on the high and low pressure sides CJ1 and 2 To evacuate air from the indoor units and extension pipes Apply a vacuum through the che...

Page 21: ...uitable for use 2 Notes When using a cylinder with a siphon refrigerant is charged in the liquid state without the need for turning it upside down Check the type of the cylinder on the label before use 10 Remedies to be taken in case of a Refrigerant Leak If the refrigerant leaks out it may be replenished The entire refrigerant does not need to be replaced Charge refrigerant in the liquid state Re...

Page 22: ...laced 3 Pressure characteristics The pressure in the system using R410A is 1 6 times as great as that in the system using R22 New Refrigerant HFC type Conventional Refriger ant HCFC type R410A R407C R22 R32 R125 R32 R125 R134a R22 Composition wt 50 50 23 25 52 100 Type of Refrigerant Pseudo azeotropic Refrigerant Non azeotropic Refrigerant Single Refrigerant Chloride Not included Not included Incl...

Page 23: ...nants is defined as moisture air processing oil dust dirt wrong types of refrigerant and refrigerating machine oil Cause Symptoms Effects on the refrigerant cycle Water infiltration Frozen expansion valve and capillary tubes Clogged expansion valve and capillary tubes Poor cooling performance Compressor overheat Motor insulation failure Burnt motor Coppering of the orbiting scroll Lock Burn in on ...

Page 24: ...5 HWE09070 GB II Restrictions 1 System configuration 17 2 Switch Settings and Address Settings 18 3 An Example of a System to which an MA Remote Controller is connected 20 4 Restrictions on Pipe Length 23 ...

Page 25: ... 16 ...

Page 26: ...of connectable indoor units refers to the sum of the numeric values in the indoor unit model names 2 If the total capacity of the indoor units that are connected to a given outdoor unit exceeds the capacity of the outdoor unit the indoor units will not be able to perform at the rated capacity when they are operated simultaneously Select a combination of units so that the total capacity of the conn...

Page 27: ...ly designated as OC and OS in the order of capacity from large to small if two or more units have the same capacity in the order of address from small to large 3 Turn off the power to all the outdoor units in the same refrigerant circuit 4 The symbol of WCB is the same as that of BC controller 2 M NET Address settings WCB address setting is the same way as the main BC controller Units on which to ...

Page 28: ... II Restrictions 19 HWE09070 GB ...

Page 29: ...s to a system re fer to the next section 5 2 An example of a system with one outdoor unit to which 2 or more LOSSNAY units are connected in the R2 service handbook 3 Maximum allowable length 1 Indoor outdoor transmission line Maximum distance 1 25mm2 AWG16 or larger L1 L2 L3 L4 200m 656ft L1 L2 L3 L11 L12 L13 200m 656ft 2 Transmission line for centralized control No connection is required 3 MA rem...

Page 30: ...minal block on the MA re motecontroller Non polarized two wire When performing a group operation of indoor units that have different functions Automatic indoor outdoor ad dresssetup is not available 4 LOSSNAY connection Connect terminals M1 and M2 on the terminal block TB5 on the indoor unit IC to the appropriate ter minals on the terminal block TB5 on LOSSNAY LC Non polarized two wire Interlock o...

Page 31: ... 22 II Restrictions GB HWE09070 ...

Page 32: ... E a b c d e f g Refer to the restrictions on the total piping length in the graph on the next page Total pipe length from the outdoor unit to the farthest indoor unit A C D E g A B c 165 541 or less Equivalent length 190 623 or less Between outdoor unit and WCB A 110 360 or less Between WCB and indoor unit C D E g B c 40 131 or less 1 Height difference Between indoor and outdoor units Outdoor uni...

Page 33: ...0 600 500 400 300 200 10 20 30 40 50 60 70 80 90 100 110 Aggregate length of all pipes m ft Pipe length between outdoor unit and WCB m ft 32 64 98 131 164 196 229 262 295 328 360 3280 2952 2624 2296 1968 1640 1312 984 656 32 16 32 49 64 98 131 164 196 229 1000 900 800 700 600 500 400 300 200 10 20 30 40 50 60 70 80 90 100 110 Restrictions on pipe length PURY EP250 EP300 P350YHM A Aggregate length ...

Page 34: ...ø15 88 5 8 250 ø22 2 7 8 ø19 05 3 4 ø22 20 7 8 ø19 05 3 4 300 350 ø28 58 1 1 8 ø28 58 1 1 8 Unit mm inch Indoor unit Refrigerant pipe size Brazed connection on all models Liquid pipe Gas pipe P140 ø9 52 3 8 ø15 88 5 8 P141 P200 ø19 05 3 4 P201 P300 ø22 2 7 8 P301 P400 ø12 7 1 2 ø28 58 1 1 8 P401 ø15 88 5 8 Unit mm inch Indoor unit Refrigerant pipe size Indoor unit connection Flare connection for a...

Page 35: ... side PURY E P200YHM A PQRY P200YHM A ø15 88 5 8 Brazed connection ø19 05 3 4 Brazed connection PURY E P250YHM A PURY E P300YHM A PQRY P250YHM A PQRY P300YHM A ø19 05 3 4 Brazed connection ø22 2 7 8 Brazed connection PURY P350YHM A ø28 58 1 1 8 Brazed connection Indoor unit side P140 ø9 52 3 8 Brazed connection ø15 88 5 8 Brazed connection P141 P200 ø19 05 3 4 Brazed connection P201 P300 ø22 2 7 8...

Page 36: ... 27 HWE09070 GB III WCB Components 1 WCB Components 29 2 Control Box of the WCB 30 3 WCB Circuit Board 31 ...

Page 37: ... 28 ...

Page 38: ... WCB Components 1 Front 2 Rear view Liquid pipe PWFY side Liquid pipe Indoor unit side or PWFY side Gas pipe PWFY side Gas pipe Indoor unit side or PWFY side TH13 TH11 TH15 TH14 TH16 TH12 SVM1 LEV1 LEV3 Tube in tube heat exchanger Gas Liquid separator 21S4a ...

Page 39: ... III WCB Components 30 HWE09070 GB 2 Control Box of the WCB Transformer Terminal block for transmission line WCB board Terminal block for power supply ...

Page 40: ... III WCB Components 31 HWE09070 GB 3 WCB Circuit Board SW1 SW2 SW5 SW6 SW4 ...

Page 41: ... 32 III WCB Components GB HWE09070 ...

Page 42: ... 33 HWE09070 GB IV Electrical Wiring Diagram 1 Electrical Wiring Diagram of the WCB 35 ...

Page 43: ... 34 ...

Page 44: ...ster sensor Expansion valve Terminal block for power source Terminal block for Transmission Solenoid valve 4 way valve Fuse AC250V 6 3A F TO NEXT INDOOR UNIT PULL BOX FUSE 16A BREAKER 16A POWER SUPPLY 220V 240V 50Hz 60Hz L N 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 M1 M2 S SHIELD Indoor outdoor Transmission line 1 3 Red CNTR X02 X01 CN26 1 3 5 7 AC250V 6 3A F ZNR02 1 3 5 ZNR01 DSA CN12 U LD1 CPU in operati...

Page 45: ... 36 IV Electrical Wiring Diagram GB HWE09070 ...

Page 46: ... 37 HWE09070 GB V Refrigerant Circuit 1 Refrigerant Circuit Diagram 39 2 Principal Parts and Functions 40 ...

Page 47: ... 38 ...

Page 48: ...only Brazed PWFY unit liquid pipe Heating only Brazed Indoor or PWFY unit liquid pipe Cooling or Heating Brazed Indoor or PWFY unit gas pipe Cooling or Heating Brazed R2 high pressure pipe Brazed LEV1 SVM1 Gas Liquid separator TH11 TH13 TH14 LEV3 HIC Circuit TH15 TH12 21S4a TH16 R2 low pressure pipe Brazed ST1 ST2 ST3 ...

Page 49: ...ol differential tem perature control TH14 HIC inlet tempera ture LEV control liquid level con trol differential temperature control TH15 Bypass in let tempera ture LEV control Superheat TH16 Liquid re frigerant tempera ture LEV control Subcool Solenoid valve SVM1 Opens during cooling and de frost modes AC220 240V Open while being powered closed while not being pow ered Continuity check with a test...

Page 50: ... 41 HWE09070 GB VI Control 1 Functions and Factory Settings of the Dipswitches 43 2 Controlling WCB 44 3 Operation Flow Chart 46 ...

Page 51: ... 42 ...

Page 52: ... functions WCB Control board 1 Refer to VI 2 Controlling WCB for detail Switch Function Function according to switch setting Switch setting timing OFF ON SW4 1 8 SW5 1 8 SW6 1 4 5 Energy save mode Disabled Enabled Any time 6 7 8 Changing the pressure equalization time 1 6 minutes 18 minutes Any time ...

Page 53: ... control The LEV maintains the liquid level as calculated from the HIC inlet subcool temperature TH13 and TH14 in the specified range on a minute basis 2 Differential temperature control The valve operates to maintain the temperature difference dTHM between TH11 and TH13 in the specified range on a minute basis 110 110 3 3 The pulse may rise above 110 due to pressure rise on the liquid side 2000 1...

Page 54: ...nged by DIP SW6 8 OFF 6 minutes ON 18 minutes Note 2 Select the installation site carefully considering the noise that is produced when the 4 way valve is switched Install the unit in a place where the noise from the unit will not be a problem Install indoor unit and WCB at least 5 m 16 6 16 ft away from each other when installing in a space with low background noise e g hotel rooms Install the un...

Page 55: ...Note 2 Note 3 Note 3 Note 3 1 Protection function self holding cancelled 2 Indoor unit LEV fully closed 1 Auxiliary heater OFF 2 Low fan speed for 1 minute YES YES YES YES YES YES YES YES Normal operation Error Stop 1 Prohibition Auto COOL HEAT display Automatic cooling heating mode Note 3 YES Auto cooling heating mode 1 1 Note 1 Indoor unit LEV fully closed Opening 41 Note 2 The system may go int...

Page 56: ... WCB address indoor unit address remote controller address and group information will start During the search HO PLEASE WAIT blinks on the display of the remote controller When the indoor unit to be controlled by the remote controller is missing HO PLEASE WAIT keeps blinking on the display of the remote controller even after three or more minutes have passed after power on Note 3 The units will fo...

Page 57: ...g and heating 2 Transmitted to the outdoor unit 3 3 Operation mode Note 1 The system may go into the error mode on the indoor unit WCB or outdoor unit side If some of the indoor units are experiencing a problem only those indoor units that are experiencing the problem will stop If WCB or the outdoor unit is experiencing a problem all the connected units will stop Operation mode Operation mode Cool...

Page 58: ...t fan control 5 WCB solenoid valve control 6 WCB LEV control 7 WCB 4 way valve control Normal operation During test run mode Indoor unit fan operation 1 Inverter output 0Hz 2 Indoor unit LEV open to the specified position 3 Solenoid valves OFF 4 Outdoor unit fan stop 5 WCB solenoid valves OFF 6 WCB LEV fully closed 7 WCB 4 way valve control Unit in the stopped state 2 3 Note 1 The indoor fan opera...

Page 59: ... 1 2 Note 1 2 YES YES YES YES NO NO NO NO NO 1 Indoor outdoor unit fan control 2 Inverter frequency control 3 Indoor unit LEV fully open 4 Solenoid valve control 5 WCB solenoid valve control 4 way valve control 6 WCB LEV control 7 WCB 4 way valve control Normal operation Defrost operation 4 way valve ON During test run mode 1 Indoor unit fan operation at Very Low speed 2 Inverter output 0Hz 3 Indo...

Page 60: ...id valve OFF 7 WCB LEV fully closed 8 WCB 4 way valve control 2 3 Note 1 When the indoor unit inlet temperature exceeds 18 C 64 F the outdoor unit compressor and the indoor unit fan start the intermittent operation simultaneously The outdoor unit WCB the LEVs and solenoid valves on the outdoor unit operate in the same way as they do in the cooling operation when the compressor is turned on Note 2 ...

Page 61: ... 52 VI Control GB HWE09070 ...

Page 62: ... 53 HWE09070 GB VII Test Run Mode 1 Items to be checked before a Test Run 55 2 Adjusting the Refrigerant Amount 56 3 The following symptoms are normal 56 4 Standard Operation Data Reference Data 57 ...

Page 63: ... 54 ...

Page 64: ...essor will evaporate and the insulation resistance will go up Do not measure the insulation resistance of the terminal block for transmission line for the unit remote controller 3 Check that the valve on the gas pipe and liquid pipe are fully open Securely tighten the cap 4 Check the phase sequence and the voltage of the power supply 5 When a transmission booster is connected Turn on the transmiss...

Page 65: ...ter it is turned on or until the pipe temperature reaches 35 C 95 F then it operates at low speed for 2 minutes and finally it operates at the set speed Pre heating stand by When the main power is turned on the display shown on the right appears on the in door unit remote controller for 5 minutes HO or PLEASE WAIT icons blink on the display The system is starting up Wait until the blinking display...

Page 66: ...Branch pipe 10 32 3 4 Total pipe length 25 82 Fan speed Hi Amount of refrigerant kg lbs oz 18 5 41 Outdoor unit Electric current A 12 8 Voltage V 400 Compressor frequency Hz 65 LEV open ing Indoor unit Pulse 387 387 WCB 1 3 2000 170 Pressure High pressure 63HS1 Low pressure 63LS MPa psi 2 96 0 78 429 113 Temp of each sec tion Outdoor unit Discharge TH4 C F 85 185 Heat exchanger outlet TH3 39 102 A...

Page 67: ... 4 Total pipe length 25 82 Fan speed Hi Amount of refrigerant kg lbs oz 18 5 41 Outdoor unit Electric current A 12 1 Voltage V 400 Compressor frequency Hz 71 LEV open ing Indoor unit Pulse 406 406 WCB 1 3 110 590 Pressure High pressure 63HS1 Low pressure 63LS MPa psi 2 90 0 64 421 93 Temp of each sec tion Outdoor unit Discharge TH4 C F 80 176 Heat exchanger outlet TH6 0 32 Accumulator inlet 2 28 A...

Page 68: ... 4 Total pipe length 25 82 Fan speed Hi Amount of refrigerant kg lbs oz 19 8 43 Outdoor unit Electric current A 11 0 Voltage V 400 Compressor frequency Hz 65 LEV open ing Indoor unit Pulse 387 387 WCB 1 3 2000 170 Pressure High pressure 63HS1 Low pressure 63LS MPa psi 2 60 0 78 377 113 Temp of each sec tion Outdoor unit Discharge TH4 C F 77 171 Heat exchanger outlet TH3 31 88 Accumulator inlet 8 4...

Page 69: ...3 4 Total pipe length 25 82 Fan speed Hi Amount of refrigerant kg lbs oz 19 8 43 Outdoor unit Electric current A 12 1 Voltage V 400 Compressor frequency Hz 69 LEV open ing Indoor unit Pulse 406 406 WCB 1 3 110 590 Pressure High pressure 63HS1 Low pressure 63LS MPa psi 2 90 0 67 421 97 Temp of each sec tion Outdoor unit Discharge TH4 C F 80 176 Heat exchanger outlet TH6 1 34 Accumulator inlet 1 30 ...

Page 70: ...pe m ft 5 16 3 8 Branch pipe 10 32 3 4 Total pipe length 25 82 Fan speed Hi Refrigerant charge kg lbs oz 13 0 29 Heat source unit Current A 13 4 Voltage V 400 Compressor frequency Hz 90 LEV opening Indoor unit Pulse 387 387 WCB 1 3 2000 170 Pressure High pressure 63HS1 Low pressure 63LS MPa psi 2 27 0 81 329 117 Temp of each section Heat source unit Discharge TH4 C F 65 149 Heat exchanger outlet 3...

Page 71: ...ipe m ft 5 16 3 8 Branch pipe 10 32 3 4 Total pipe length 25 82 Fan speed Hi Refrigerant charge kg lbs oz 13 0 29 Heat source unit Current A 14 5 Voltage V 400 Compressor frequency Hz 72 LEV opening Indoor unit Pulse 406 406 WCB 1 3 110 590 Pressure High pressure 63HS1 Low pressure 63LS MPa psi 2 90 0 80 421 116 Temp of each section Heat source unit Discharge TH4 C F 80 176 Heat exchanger outlet 5...

Page 72: ... 63 HWE09070 GB VIII Troubleshooting 1 Error Code Lists 65 2 Responding to Error Display on the Remote Controller 66 3 Troubleshooting Principal Parts 87 4 Servicing the WCB 97 ...

Page 73: ... 64 ...

Page 74: ...emperature TH13 5114 HIC inlet temperature TH14 5115 LEV3 outlet temperature TH15 5116 LEV3 inlet temperature TH16 6600 Address overlaps 6602 Transmission processor hardware error 6603 Transmission line bus busy error 6606 Communication error between device and trans mission processors 6607 No ACK error 6608 No response error 7100 Total capacity error 7101 Capacity code setting error 7102 Wrong nu...

Page 75: ...hat are in any mode other than Fan or Stop to an error stop 2502 appears on the monitor of the units that came to an error stop 6 Forced stoppage of the outdoor unit Detection timing The error is detected whether the unit is in operation or stopped 7 Ending criteria for the forced stoppage of outdoor unit Power reset the indoor unit that was identified as the error source and the outdoor unit that...

Page 76: ...ings the outdoor unit in the same refrigerant circuit to an error stop compressor operation prohibited and the outdoor unit brings all the indoor units in the same refrigerant circuit that are in any mode other than Fan or Stop to an error stop 6 Forced stoppage of the outdoor unit Detection timing The error is detected whether the unit is in operation or stopped This error is detected whether the...

Page 77: ... changed 3 Cause check method and remedy Reference 5111 5112 5113 5114 5115 5116 Cause Check method and remedy 1 Thermistor failure Check thermistor resistance 2 Pinched lead wire Check for pinched lead wire 3 Torn wire coating Check for wire coating 4 A pin on the male connector is missing or contact failure Check connector 5 Disconnected wire Check for wire 6 Thermistor input circuit failure on ...

Page 78: ...followings have the same address Outdoor units WCB indoor units LOSSNAY units controllers such as ME remote controllers Example 6600 01 appears on the remote controller Unit 01 detected the error Two or more units in the system have 01 as their ad dress Find the unit that has the same address as that of the error source If address overlaps are detected correct the address Then turn off the power t...

Page 79: ...ts connected to different outdoor units or in case of the system connected with MELANS 4 Check method and remedy 6602 NO Tightly reconnect the male power supply connector to the female power supply switch connector CN40 YES YES YES YES YES YES NO NO NO NO Is the transmission line work performed while the power is on Check the power source of the indoor unit 198 264V Check the transmission line wor...

Page 80: ... on the display on the remote controller indicates the controller where an error oc curred 3 Cause check method and remedy 6603 Cause Check method and remedy 1 The transmission processor cannot be transmit ted as the short wavelength voltage like noise ex ists consecutively on the transmission line No noise indicates that the error source controller is a fail ure If noise exists investigate the no...

Page 81: ... back on If the error is accidental they will run normally If not check the causes 1 4 2 Faulty or disconnected transmission wiring of WCB 3 Disconnected connector of WCB CN02 4 Faulty control board of WCB Indoor unit IC ME re mote con troller RC MA re mote con troller MA No ac knowl edgement ACK at RC trans mission to IC 1 When IC unit address is changed or modified during operation Turn off the ...

Page 82: ...nt ACK at RC transmissionto IC 1 Same causes as 1 5 for sys tem with one outdoor unit 1 Turn off the power sources of the outdoor and indoor units for 5 or more minutes and turn them on again If the error is accidental the will run normal ly If not check the cause 2 2 Disconnection or short circuit of the transmission line for the out door unit on the terminal block for centralized control line co...

Page 83: ... that are connect ed to different outdoor units 1 Turn off the power source of LOSSNAY for 5 or more min utes and turn it on again If the error is accidental it will run normally If not check the cause 2 2 Disconnection or short circuit of the transmission line for the outdoor unit on the termi nal block for centralized con trol line connection TB7 2 Check the causes of 1 5 If the cause is found c...

Page 84: ... LOSSNAY for 5 or more min utes and turn it on again If the error is accidental it will run normally If not check the cause 2 2 Disconnection or short circuit of the transmission line for the outdoor unit on the termi nal block for centralized con trol line connection TB7 2 Check the causes of 1 5 If the cause is found correct it If no cause is found check 3 3 When multiple outdoor units are conne...

Page 85: ...response ACK 3 System configuration 3 System connected to the system controllers MELANS 6607 Error source address Error display Detection method Cause Check method and remedy Out door unit OC ME remote controller RC System control ler SC MA remote controller MA No acknowl edgement ACK at IC transmis sion to OC Same cause as that for system with one outdoor unit Same remedy as that for system with ...

Page 86: ...h one outdoor unit 1 Same cause as that for system with one outdoor unit 2 Error occurrence on all IC in the system with one outdoor unit 1 Check the LED display for troubleshooting on the outdoor unit 1 Total capacity error 7100 If an error is found check the check code definition and correct the error If no error is found check 2 2 Capacity code error 7101 3 Error in the number of connected unit...

Page 87: ...C Same remedy as that for system with one outdoor unit 1 Same cause as that for system with one outdoor unit 2 Error occurrence on all IC in the system with one outdoor unit 1 Check the LED display for troubleshooting on the out door unit 1 An error is found by the outdoor unit Total capacity error 7100 Capacity code error 7101 Error in the number of connected units 7102 Address setting error 7105...

Page 88: ...ler 3 ME remote controller failure 2 Error occurrence on all IC in the system with one outdoor unit 1 Check the LED display for troubleshooting on the out door unit 1 An error is found by the outdoor unit Total capacity error 7100 Capacity code error 7101 Error in the number of connected units 7102 Address setting error 7105 If an error is found check the check code definition and correct the erro...

Page 89: ...me indoor units have Use either of the following two methods for deletion 2 Although the address of LOSSNAY has been changed after the interlock registration of LOSSNAY is made using ME remote controller the in door unit is keeping the mem ory of the previous address 1 Address deletion by ME remote controller Delete unnecessary address in formation using the manual set ting function of ME remote c...

Page 90: ...eding acceptable range of transmission wiring Farthest 200m 656ft or less Remote controller wiring 12m 39ft or less 4 The transmission line voltage signal is decreased due to erroneous sizing of transmission line Wire diameter 1 25mm2 AWG16 or more 4 Check method and remedy 1 When an error occurs during commissioning turn off the power sources for the outdoor unit indoor unit WCB and LOSSNAY for 5...

Page 91: ...capacity code of the connected indoor unit set by the switch SW2 on indoor unit board When the model name set by the switch is differ ent from that of the unit connected turn off the power source of the outdoor and the indoor units and change the setting of the model name ca pacity code 2 The model selection switches SW5 1 5 4 on the outdoor unit are set incorrectly Check the setting for the model...

Page 92: ... the indoor outdoor transmission line TB3 4 Check the setting for the model selection switch on the outdoor unit Dipswitches SW5 7 on the outdoor unit control board 2 Disconnected transmission line from the outdoor unit or WCB 3 Short circuited transmission line When 2 and 3 apply the following display will appear ME remote controller Nothing appears on the remote controller be cause it is not pow...

Page 93: ...r unit WCB Erroneous setting of OC unit address The address of outdoor unit is not being set to 51 100 The address of WCB is not set to 51 100 Check that the outdoor unit and WCB address es are set to 00 or a number between 51 and 100 If the outdoor unit address is out of the valid range reset the address with the power to the outdoor unit turned off If the WCB address is out of the valid range re...

Page 94: ...witch or the model using the model capacity code setting switch turn off the power of the outdoor unit the WCB and the indoor unit 2 The port number for indoor unit has not been set according to the table below 3 The port number for indoor unit has been set to 1 which is the port number for PWFY Model total Port 525 350 Indoor unit PWFY port PWFY port Port number Port Indoor unit PWFY port 0 PWFY ...

Page 95: ... unit is for use with a refrigerant other than R410A The connected outdoor unit is old type older than YGM or YHM with a S W version that does not support WCB Incorrect type of indoor units are connected The M NET connection adapter is connected to the indoor unit system in a system in which the Slim Model A control of units are con nected to the M NET Check the model names of the connected in doo...

Page 96: ...re to judge the number 5 2 1 3 4 6 Output state Output phase number 1 2 3 4 1 ON OFF OFF ON 2 ON ON OFF OFF 3 OFF ON ON OFF 4 OFF OFF ON ON Output pulses change in the following orders when the Valve is closed 1 2 3 4 1 Valve is open 4 3 2 1 4 1 When the LEV opening angle does not change all the output phases will be off 2 When the output is open phase or remains ON the motor cannot run smoothly a...

Page 97: ...ace the LEV coils Incomple sealing leak from the valve When checking the refrigerant leak from the indoor LEV run the target indoor unit in the fan mode and the other indoor units in the cooling mode Then check the liquid temperature TH22 with the self diagnosis LED When the unit is running in the fan mode the LEV is ful ly closed and the temperature detected by the thermis tor is not low If there...

Page 98: ...measured by the thermistor and the temperature measured by a commercially available thermometer and check whether there is no difference between them Insert the connector of the thermistor in trouble into the board check the sensor inlet temperature on the LED monitor and check the temperature difference START Normal Troubleshooting instructions for thermistor Replace the thermistor Temperature di...

Page 99: ...s a tester Compare the measured value with that of shown in the figure below When the result is 10 it is normal 3 Check the self diagnosis switch Outdoor control board SW1 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 ON ON ON ON 1 2 3 4 5 6 7 8 9 10 ON 1 2 3 4 5 6 7 8 9 10 ON Measurement data SW1 setting value Symbol Liquid inlet temperature Bypass outlet tem...

Page 100: ...em No cooling capacity No heating capacity Repair the fault Fault is found Note 1 NO Check that LEV1 is fully open Check that LEV1 is fully closed Cooling or heating operation Note 2 Heating operation Check whether LEV3 is controlling superheat Check LEV1 Check LEV3 LEV1 is fully open Check that LEV3 is modulating the differential temperature LEV1 is fully closed Note 3 Note 2 Note 3 YES NO Coolin...

Page 101: ...g and non heating SH12 small SH16 large but branch pipe SC small WCB sound THM large Poor heating performance Indoor heating SC small THM large Non cooling Indoor heating SC small THM large Part Malfunction mode Operation mode Content Standards of judgment on unit stable operation WCB LEV1 Inclined to close Cooling main Difference between TH11 and TH13 is large Cooling main 5 to 7 C 9 to 12 6 F He...

Page 102: ... 9 10 ON 1 2 3 4 5 6 7 8 9 10 ON 1 2 3 4 5 6 7 8 9 10 ON 1 2 3 4 5 6 7 8 9 10 ON 1 2 3 4 5 6 7 8 9 10 ON LEV1 opening LEV3 opening WCB bypass outlet superheat WCB intermediate part subcool SH12 SC16 WCB liquid side subcool SC14 Measurement data SW1 setting value Symbol WCB ...

Page 103: ...e lead wires visually Intermediate connector Control board Check that no refrigerant leaks from LEV Pull out the connector from the board and check that the electricity runs with a tester The wiring side of CN05 and 07 Among 1 3 and 5 and among 2 4 and 6 Check the resistance between each coil with a tester between red and white red and orange brown and yellow and brown and blue and check that the ...

Page 104: ...tream pipes of the solenoid valve When the solenoid valve is ON There is no temperature difference When the solenoid valve is OFF There is a temperature difference OK Remove the solenoid valve coil and check that there is a suction force There is a suction force Note 2 Note 2 Note 2 Measure the temperature at the upstream and downstream pipes of the solenoid valve and compare them There is no temp...

Page 105: ...ormer Before measuring the resistance pull out the connector Operation mode Cooling only Cooling main Heating only Heating main Defrost Stopped SVM1 ON Differential temperature control OFF or ON OFF OFF ON OFF Operation mode Cooling only Cooling main Heating only Heating main Defrost Stopped 21S4a OFF OFF ON OFF The status be fore defrosting maintained OFF Normal Abnormal CNTR 1 3 about 58 ohm Ope...

Page 106: ... address switch 2 When the control board is replaced the followings must be noted 1 Check that the board is for use with WCB 2 Check that the wire and the connector are properly con nected It is not required to remove the two fixing screws on the control box when checking the inside Special care must be taken when replacing heavy parts Work procedure Explanatory figure 1 Remove the service panel 1...

Page 107: ...d conduct the work carefully If required dismount the unit from the ceiling and conduct the work Special care must be taken when replacing heavy parts Work procedure Explanatory figure 1 Remove the service panel See figure at right 2 Remove the connector of the solenoid valve in trou ble 3 Remove the solenoid valve coil 1 The coils on the solenoid valves SVM1 and on the 4 way valve 21S4a can be se...

Page 108: ... 99 HWE09070 GB IX LED Monitor Display on the Outdoor Unit Board 1 How to Read the LED on the Service Monitor 101 ...

Page 109: ... 100 ...

Page 110: ...ms can be checked by making the switch setting that corresponds to No 517 in the LED display table Only item No 1 Software Version appears on the display if there is a wiring failure between the control board and the trans mission line power supply board or if the circuit board has failed 1 Display of numerical values Example When the pressure data sensor reads 18 8kg cm2 Item No 58 The unit of pr...

Page 111: ...0000 BC operation mode Cooling only ON Cooling only OFF Heating only ON Heating only OFF Mixed mode ON Mixed mode OFF Fan Stop B 132 0010000100 Relay out put display BC Main Top SVM1 SVM2 SVM1b SVM2b 21S4a B Bottom 149 1010100100 BC TH11 99 9 to 999 9 B 150 0110100100 BC TH12 99 9 to 999 9 B 151 1110100100 BC TH15 99 9 to 999 9 B 152 0001100100 BC TH16 99 9 to 999 9 B 155 1101100100 BC SC14 99 9 t...

Page 112: ...ignal 3 minutes restart mode Compressor in operation Preliminary error Error 3 minutes restart after instanta neous power failure Preliminary low pres sure error A A 203 1101001100 BC operation mode Cooling only ON Cooling only OFF Heating only ON Heating only OFF Mixed mode ON Mixed mode OFF Fan Stop A A 1 A The condition of either OC or OS is displayed individually B The condition of the entire ...

Page 113: ... 9 B 321 1000001010 BC TH12 99 9 to 999 9 B 322 0100001010 BC TH15 99 9 to 999 9 B 323 1100001010 BC TH16 99 9 to 999 9 B 330 0101001010 BC LEV1 0000 to 2000 B 331 1101001010 BC LEV3 0000 to 2000 B 342 0110101010 BC TH13 99 9 to 999 9 B 343 1110101010 BC TH14 99 9 to 999 9 B 1 A The condition of either OC or OS is displayed individually B The condition of the entire refrigerant system is displayed...

Page 114: ...Service Handbook CMB PW202V J Issued in Sep 2009 HWE09070 Printed in Japan New publication effective Sep 2009 Specifications subject to change without notice ...

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