Mitsubishi Electric r410a - Manuals

iv HWE09080 GB Before installing the unit WARNING Do not install the unit where a gas leak may occur. If gaseous refrigerant leaks and piles up around the unit, it may be ignited. Do not use the unit to keep food items, animals, plants, artifacts, or for other special purposes. The unit is not desig...

v v HWE09080 GB Before installing the unit (moving and reinstalling the unit) and performing electrical work CAUTION Properly ground the unit. Do not connect the grounding wire to a gas pipe, water pipe, lightning rod, or grounding wire from a telephone pole. Im-proper grounding may result in electr...

vi HWE09080 GB Before the test run CAUTION Turn on the unit at least 12 hours before the test run. Keep the unit turned on throughout the season. If the unit is turned off in the middle of a season, it may result in malfunc-tions. To avoid the risk of electric shock or malfunction of the unit, do no...

CONTENTS HWE09080 GB I Read Before Servicing [1] Read Before Servicing .............................................................................................................. 3[2] Necessary Tools and Materials ......................................................................................

CONTENTS HWE09080 GB IX Troubleshooting [1] Error Code Lists .................................................................................................................... 227[2] Responding to Error Display on the Remote Controller........................................................ 230[3]...

- 1 - HWE09080 GB I Read Before Servicing [1] Read Before Servicing ....................................................................................................... 3 [2] Necessary Tools and Materials.......................................................................................... 4 ...

[ I Read Before Servicing ] - 3 - HWE09080 GB I Read Before Servicing [1] Read Before Servicing 1. Check the type of refrigerant used in the system to be serviced. Refrigerant Type Multi air conditioner for building application CITY MULTI WY/WR2 THMU-A/YHMU-A series: R410A 2. Check the symptoms exhi...

[ I Read Before Servicing ] - 4 - HWE09080 GB [2] Necessary Tools and Materials Prepare the following tools and materials necessary for installing and servicing the unit. Tools for use with R410A (Adaptability of tools that are for use with R22 or R407C) 1. To be used exclusively with R410A (not to ...

[ I Read Before Servicing ] - 5 - HWE09080 GB [3] Piping Materials 1. Copper pipe materials ΠThe distinction between O-materials (Annealed) and 1/2H-materials (Drawn) is made based on the strength of the pipes them- selves. 2. Types of copper pipes 3. Piping materials/Radial thickness Use refrigera...

[ I Read Before Servicing ] - 6 - HWE09080 GB 4. Thickness and refrigerant type indicated on the piping materials Ask the pipe manufacturer for the symbols indicated on the piping material for new refrigerant. 5. Flare processing (O-material (Annealed) and OL-material only) The flare processing dime...

[ I Read Before Servicing ] - 7 - HWE09080 GB [4] Storage of Piping 1. Storage location Store the pipes to be used indoors. (Warehouse at site or owner's warehouse) If they are left outdoors, dust, dirt, or moisture may infiltrate and contaminate the pipe. 2. Sealing the pipe ends Both ends of the p...

[ I Read Before Servicing ] - 8 - HWE09080 GB [6] Brazing No changes have been made in the brazing procedures. Perform brazing with special care to keep foreign objects (such as oxide scale, water, and dust) out of the refrigerant system. Example: Inside the brazed connection 1. Items to be strictly...

[ I Read Before Servicing ] - 9 - HWE09080 GB [7] Air Tightness Test No changes have been made in the detection method. Note that a refrigerant leak detector for R22 will not detect an R410A leak. 1. Items to be strictly observed ΠPressurize the equipment with nitrogen up to the design pressure (4....

[ I Read Before Servicing ] - 10 - HWE09080 GB [8] Vacuum Drying (Evacuation) 1. Vacuum pump with a reverse-flow check valve (Photo1) To prevent the vacuum pump oil from flowing into the refrigerant circuit during power OFF or power failure, use a vacuum pump with a reverse-flow check valve.A revers...

[ I Read Before Servicing ] - 11 - HWE09080 GB 7. Notes ΠTo evacuate air from the entire system Applying a vacuum through the check joints at the refrigerant service valve (BV1 and 2) is not enough to attain the desired vacuum pressure.Be sure to apply a vacuum through the check joints at the refri...

[ I Read Before Servicing ] - 12 - HWE09080 GB [9] Refrigerant Charging 1. Reasons R410A is a pseudo-azeotropic HFC blend (boiling point R32=-52°C[-62°F], R125=-49°C[-52°F]) and can almost be handled the same way as a single refrigerant, such as R22. To be safe, however, draw out the refrigerant fro...

[ I Read Before Servicing ] - 13 - HWE09080 GB [11] Characteristics of the Conventional and the New Refrigerants 1. Chemical property As with R22, the new refrigerant (R410A) is low in toxicity and chemically stable nonflammable refrigerant.However, because the specific gravity of vapor refrigerant ...

- 15 - HWE09080 GB II Restrictions [1] System configuration ....................................................................................................... 17 [2] Types and Maximum allowable Length of Cables ........................................................... 18 [3] Switch Settings a...

[ II Restrictions ] - 18 - HWE09080 GB [2] Types and Maximum allowable Length of Cables 1. Wiring work (1) Notes 1) Have all electrical work performed by an authorized electrician according to the local regulations and instructions in this man- ual. 2) Install external transmission cables at least 5...

[ II Restrictions ] - 19 - HWE09080 GB 2) Remote controller wiring *1 MA remote controller refers to MA remote controller (PAR-20MAA, PAR-21MAA), MA simple remote controller, and wireless remote controller. *2 M-NET remote controller refers to ME remote controller and ME simple remote controller.*3 ...

[ II Restrictions ] - 20 - HWE09080 GB 2. M-NET Address settings(1) Address settings table The need for address settings and the range of address setting depend on the configuration of the system. *1. If a given address overlaps any of the addresses that are assigned to other units, use a different,...

[ II Restrictions ] - 22 - HWE09080 GB (5) Various start-stop controls (Indoor unit settings) Each indoor unit (or group of indoor units) can be controlled individually by setting SW 1-9 and 1-10. *1. Do not cut off power to the heat source unit. Cutting off the power supply to the heat source unit ...

[ II Restrictions ] - 23 - HWE09080 GB *4. By setting Dip SW5-5, the Low-noise mode can be switched between the Capacity priority mode and the Low-noise pri- ority mode.When SW5-5 is set to ON: The low-noise mode always remains effective.When SW5-5 is set to OFF: The low noise mode is cancelled when...

[ II Restrictions ] - 24 - HWE09080 GB (8) Demand control 1) General outline of control Demand control is performed by using the external signal input to the 1-2 and 1-3 pins of CN3D on the heat source units (OC, OS1, and OS2).Between 2 and 12 steps of demand control is possible by setting DIP SW4-4...

- 28 - [ II Restrictions ] GB HWE09080 (4) Wiring method 1) Indoor-heat source transmission line Daisy-chain terminals M1 and M2 on the terminal block for indoor-heat source transmission line (TB3) on the heat source units (OC, OS1, OS2) (Note 1), and termi-nals M1 and M2 on the terminal block for i...

[ II Restrictions ] 37 - 37 - HWE09080 GB 6. System with one heat source unit (automatic address setup for both indoor and heat source units) <PQRY>(1) Sample control wiring (2) Cautions 1) ME remote controller and MA remote controller cannot both be connected to the same group of indoor units...

[ II Restrictions ] 43 - 43 - HWE09080 GB 9. A system in which a system controller is connected to the transmission line for centralized control and which is pow- ered from a heat source unit <PQRY> (1) Sample control wiring (2) Cautions 1) ME remote controller and MA remote controller cannot ...

[ II Restrictions ] 47 - 47 - HWE09080 GB 11. A system with multiple BC controller connections (with a system controller connected to the centralized control line) <PQRY> (1) Sample control wiring (2) Cautions 1) ME remote controller and MA remote controller cannot both be con- nected to the s...

- 48 - [ II Restrictions ] GB HWE09080 (4) Wiring method 1) Indoor-heat source transmission line Daisy-chain terminals M1 and M2 of the terminal block for indoor-heat source transmission line (TB3) on the heat source units (OC and OS), of the terminal block for indoor-heat source transmission line (...

- 54 - [ II Restrictions ] GB HWE09080 (4) Wiring method 1) Indoor-heat source transmission line Same as [5] 1. Shielded cable connection Same as [5] 1. 2) Transmission line for centralized control Same as [5] 4. Shielded cable connection Same as [5] 4. 3) MA remote controller wiring Same as [5] 1. ...

[ II Restrictions ] 57 - 57 - HWE09080 GB (5) Address setting method The heat source units in the same refrigerant circuit are automatically designated as OC and OS. They are designated as OC and OS in the descending order of capacity (ascending order of address if the capacities are the same). Pro-...

[ II Restrictions ] - 58 - HWE09080 GB [8] Restrictions on Pipe Length (1) End branching <PQHY> P72 - P120 models Unit: m [ft] Operation Pipe sections Allowable length of pipes Length Total pipe length A+B+C+D +a+b+c+d+e+f 300 [984] or less Total pipe length (L) from the heat source unit to th...

[ II Restrictions ] - 59 - HWE09080 GB P144 - P360 models Unit: m [ft] Operation Pipe sections Allowable length of pipes Length Between heat source units A+B+C+D 10 [32] or less Total pipe length A+B+C+D+E+F+G+I+J+K+M+a+b+c+d+e+f+g +i 300 [984] or less Total pipe length (L) from the heat source unit...

[ II Restrictions ] - 62 - HWE09080 GB (1) System that requires 16 BC controller ports or fewer <System with only the main BC controller or standard BC con- troller> <PQRY> Unit: m [ft] Operation Pipe sections Allowable length of pipes Length Total pipe length A+B+a+b+c+d Refer to the re...

[ II Restrictions ] - 67 - HWE09080 GB 1) A system that requires more than 16 BC controller ports requires two or three BC controllers (main and sub), and three pipes will be used between the main and the sub BC controllers. 2) When connecting two sub BC controllers, observe the maximum allowable le...

[ II Restrictions ] - 71 - HWE09080 GB (2) Size of the pipe that fits the main BC controller ports P72 - P240 models The ports of the BC controller accommodates the pipes on P24-P54 models of indoor units. To connect other types of indoor units, follow the procedure below. 1) To connect P06-P18 mode...

[ II Restrictions ] - 72 - HWE09080 GB (3) Size of the pipe that fits the sub BC controller ports The ports of the BC controller accommodates the pipes on P24-P54 models of indoor units. To connect other types of indoor units, follow the procedure below. 1) To connect P06-P18 models of indoor units ...

- 73 - HWE09080 GB III Heat source Unit Components [1] Heat source Unit Components and Refrigerant Circuit .................................................... 75 [2] Control Box of the Heat source Unit ................................................................................ 78 [3] Heat sour...

[ III Heat source Unit Components ] - 75 - HWE09080 GB III Heat source Unit Components [1] Heat source Unit Components and Refrigerant Circuit 1. Front view of a heat source unit(1) PQHY-P72, 96, 120THMU-A, PQRY-P72, 96, 120THMU-A PQHY-P72, 96, 120YHMU-A, PQRY-P72, 96, 120YHMU-A Control box Top pane...

[ III Heat source Unit Components ] - 80 - HWE09080 GB 1. Transformer Box (1) PQHY-P72, 96, 120YHMU-A, PQRY-P72, 96, 120YHMU-A Transformer(T03) Transformer(T02)

[ III Heat source Unit Components ] - 81 - HWE09080 GB [3] Heat source Unit Circuit Board 1. Heat source unit control board CN332 Output 18VDC GND LED2Lit during normal CPU operation Serial communication signal inputGND INV boardOutput 17VDC CN801Pressure switch connection CN4 GND Serial communicati...

[ III Heat source Unit Components ] - 82 - HWE09080 GB 2. M-NET board Power supply output for centralized control system (30VDC) Indoor-heat source transmission line input/output (30VDC) CN102 CNS2Transmission line input/output for centralized control system (30VDC) CNIT Input 12VDC GND Input 5VDC P...

[ III Heat source Unit Components ] - 86 - HWE09080 GB 5. Noise Filter (1) PQHY-P72, 96, 120THMU-A, PQRY-P72, 96, 120THMU-A Grounding TB21Input/output （ L1 ） CN02Output   L1   L2 TB22Input/output （ L2 ） TB23Input/output （ L3 ） CN01Input   L3   L2   L1 F1Fuse250VAC 6.3A F2Fuse250VAC 6.3A

[ III Heat source Unit Components ] - 88 - HWE09080 GB [4] BC Controller Components 1. CMB-P NU-G, GA (1) Front (2) Rear view <G type> Liquid pipe (Indoor unit side) Gas pipe (Indoor unit side) TH12 TH15 TH16 TH11 SVM1 LEV1 LEV3 PS1 PS3 Tube in tube heat exchanger Gas/Liquid separator

[ III Heat source Unit Components ] - 91 - HWE09080 GB [5] Control Box of the BC Controller 1. CMB-P1016NU-G, GA Relay board Transformer Terminal block fortransmission line BC controller board Terminal block forpower supply

- 95 - HWE09080 GB IV Remote Controller [1] Functions and Specifications of MA and ME Remote Controllers ................................... 97 [2] Group Settings and Interlock Settings via the ME Remote Controller ............................. 98 [3] Interlock Settings via the MA Remote Controller ...

[ IV Remote Controller ] - 97 - HWE09080 GB IV Remote Controller [1] Functions and Specifications of MA and ME Remote Controllers There are two types of remote controllers: ME remote controller, which is connected on the indoor-heat source transmis-sion line, and MA remote controller, which is conne...

[ IV Remote Controller ] - 98 - HWE09080 GB [2] Group Settings and Interlock Settings via the ME Remote Controller 1. Group settings/interlock settings <Deletion error> [Normal display] (B) Interlock Settings (A) Group Settings Indoor unit address display window Indoor unit address display win...

[ IV Remote Controller ] - 99 - HWE09080 GB <Entry found> <No entries found> (C) To return to the normal display When all the group settings and interlock settings are made, take the following step to go back to the normal display. Press and hold buttons [FILTER] and [ ] simultaneously f...

[ IV Remote Controller ] - 100 - HWE09080 GB 2. Remote controller function selection via the ME remote controller (A) To delete group settings (B) To delete interlock settings <Successful completion of deletion> will be displayed in the room temperature display window. - If a transmission erro...

[ IV Remote Controller ] - 101 - HWE09080 GB [Lower limit temperature]: Appears in the preset temperature display window [Upper limit temperature: Appears in the time display window [Settable range for the lower limit temperature] : 19 C 30 C (Settable up to the upper limit temperature that is shown...

[ IV Remote Controller ] - 102 - HWE09080 GB [3] Interlock Settings via the MA Remote Controller 1. LOSSNAY interlock setting (Make this setting only when making an interlock settings between the LOSSNAY units and the Freeplan model of units.) [Operation Procedures] <Indoor unit address and indoo...

[ IV Remote Controller ] - 103 - HWE09080 GB [4] Using the built-in Temperature Sensor on the Remote Controller 1. Selecting the position of temperature detection (Factory setting: SW1-1 on the controller board on the indoor unit is set to OFF.) To use the built-in sensor on the remote controller, s...

- 105 - HWE09080 GB V Electrical Wiring Diagram [1] Electrical Wiring Diagram of the Heat source Unit ......................................................... 107 [2] Electrical Wiring Diagram of the BC Controller .............................................................. 111 [3] Electrical Wir...

[ V Electrical Wiring Diagram ] - 107 - HWE09080 GB V Electrical Wiring Diagram [1] Electrical Wiring Diagram of the Heat source Unit (1) PQHY-P72, 96, 120THMU-A *7 black red C1 + *6 RELA Y Board 4 1 CNAC4 31 5 7 CN83 1 3 4 6 CNOUT2 yellow 2 5 42 1 CNPW blue Explanation Symbol 5 4 3 2 1 6 MF1 Fan mo...

[ V Electrical Wiring Diagram ] - 111 - HWE09080 GB [2] Electrical Wiring Diagram of the BC Controller (1) CMB-P104NU-G model (Red) CNTR ZNR02 ZNR01 L2 X21 CN36(Green) 3 1 3 2 1 3 2 1 SVM1 CN29(Green) X33 X7 X8 1 3 5 7 1 4 3 2 1 14 16 15 SV4A SV4C SV4B 11 12 13 14 15 16 11 12 13 4 3 2 1 1 1 1 CN28(B...

[ V Electrical Wiring Diagram ] - 120 - HWE09080 GB [3] Electrical Wiring Diagram of Transmission Booster 100V/200VAC Terminal block for power supply(TB1) L Red Red Red White Green 250V 5A Grounding RedRed Red U U White White White White White White Blue Red Red DSA White White Blue Red Red Red Red ...

- 121 - HWE09080 GB VI Refrigerant Circuit [1] Refrigerant Circuit Diagram ........................................................................................... 123 [2] Principal Parts and Functions ........................................................................................ 126

[ VI Refrigerant Circuit ] - 124 - HWE09080 GB 2. BC controller (1) CMB-P104 - P1010NU-G (2) CMB-P108, P1013, P1016NU-GA (main) TH15 TH12 LEV3 LEV1 TH16 PS3 PS1 TH11 SVM1 Gas/Liquid separator Check valve block Solenoid valve block TH15 TH12 LEV3 SVM2 LEV1 LEV2 TH16 PS3 PS1 TH11 SVM1 Gas/Liquid separ...

[ VI Refrigerant Circuit ] - 125 - HWE09080 GB (3) CMB-P104, P108NU-GB (sub) (4) CMB-P1016NU-HB (sub) TH15 TH12 HIC-C CP LEV3 Check valve block Solenoid valve block TH15 TH12 HIC-C CP LEV3 Check valve block Solenoid valve block

- 135 - HWE09080 GB VII Control [1] Functions and Factory Settings of the Dipswitches ....................................................... 137 [2] Controlling the Heat source Unit .................................................................................... 143 [3] Controlling BC Controlle...

[ VII Control ] - 137 - HWE09080 GB VII Control [1] Functions and Factory Settings of the Dipswitches 1. Heat source unit(1) Control board 1) Unless otherwise specified, leave the switch to OFF where indicated by "-," which may be set to OFF for a reason.2) A: Only the switch on either the O...

[ VII Control ] - 140 - HWE09080 GB 2. Function of the switch (Indoor unit)(1) Dipswitches 1) SW1,3 SW3-1 OFF OFF OFF ON ON ON OFF ON OFF ON OFF ON OFF ON Very Low Low Preset speed Preset speed Preset speed Stop Stop Stop -- - Stop Switch setting SW1-7 SW1-8 Heating Cooling Cooling-only/heat pump He...

[ VII Control ] - 141 - HWE09080 GB (2) Address switch Actual indoor unit address setting varies in different systems. Refer to the installation manual for the heat source unit for details on how to make the address setting.Each address is set with a combination of the settings for the 10's digit an...

[ VII Control ] - 142 - HWE09080 GB (2) ME remote controller (PAR-F27MEA) Set the address of the remote controller with the rotary switch. To set addresses, use a precision slotted screw driver [2.0 mm [0.08 in] (w)], and do not apply than 19.6N. The use of any other tool or applying too much load m...

[ VII Control ] - 145 - HWE09080 GB -6- Compressor Frequency Control Œ Depending on the capacity required, the frequency of the compressor is controlled to keep constant evaporation temperature (0°C [32°F] = 0.71 MPa [103 psi]) during cooling operation, and condensing temperature (49°C [120°F] = 2.8...

[ VII Control ] - 146 - HWE09080 GB -7- Refrigerant Recovery Control <PQHY> Recovery of refrigerant is performed during heating operation to prevent the refrigerant from accumulating inside the unit while it is stopped (unit in fan mode), or inside the indoor unit that is in cooling mode or in...

[ VII Control ] - 147 - HWE09080 GB (2) Heat source unit heat exchanger capacity control patterns Model Operation mode Operation pattern Solenoid valve SV4a SV4b SV4d SV7a SV7b P72-P120 models Cooling 1 ON OFF OFF ON ON 2 ON OFF OFF OFF ON 3 ON OFF OFF ON OFF 4 ON OFF OFF OFF OFF 5 ON ON OFF ON ON 6...

[ VII Control ] - 149 - HWE09080 GB -11- Subcool Coil Control (Linear Expansion Valve <LEV1>) <PQHY only> ΠThe OC, OS1, and OS2 controls the subcool coil individually. ΠThe LEV is controlled every 30 seconds to maintain constant the subcool at the heat source unit heat exchanger outlet...

[ VII Control ] - 152 - HWE09080 GB -14- Emergency Operation Mode 1. Problems with the heat source unit ΠEmergency operation mode is a temporary operation mode in which the heat source unit that is not in trouble operates when one of the heat source units in the P144 through P240 models is in troub...

[ VII Control ] - 153 - HWE09080 GB (2) Ending the emergency operation 1) End conditions When one of the following conditions is met, emergency operation stops, and the unit makes an error stop. ΠWhen the integrated operation time of compressor in cooling mode has reached four hours. ΠWhen the int...

[ VII Control ] - 155 - HWE09080 GB -15- Control Method <PQRY only> The control system configuration for the PQRY models is shown in the chart below. Control method Data signal exchange between system equipment Calculation, processing System control Adjustment of refrigerant flow rate Adjustme...

[ VII Control ] - 156 - HWE09080 GB -16- Cooling/heating Circuit Control and General Function of System Equipment High-pressure gas High-pressure gas Heat exchanger High-pressure liquid 4-way valve Check valve Selector valve Low-pressure two-phase Low-pressure two-phase Low- pressure two- phase High...

[ VII Control ] - 160 - HWE09080 GB [3] Controlling BC Controller 1. Control of SV A, SV B, and SV C SV A, SV B, and SV C turn on or off depending on the operation mode of the branch. 2. Control of SVM1 and 1b SVM turns on or off depending on the operation mode. 3. Control of LEV LEV opening (sj) is...

[ VII Control ] - 162 - HWE09080 GB (2) Heat source unit (cooling and heating modes) *Note 1. For about 3 minutes after power on, search for the indoor unit address, for the remote controller address, and for the group information will start. During this, "HO" / "PLEASE WAIT" blinks ...

[ VII Control ] - 163 - HWE09080 GB 2. Operations in each mode(1) Cooling operation *Note 1. The indoor fan operates at the set notch under cooling mode regardless of the ON/OFF state of the thermostat. Cooling operation Test run mode ON Thermostat ON 3-minute restart prevention *Note 1 YES YES YES ...

[ VII Control ] - 164 - HWE09080 GB (2) Heating operation Heating operation Test run mode ON Thermostat ON 3-minute restart prevention YES YES YES NO NO NO NO 1. Indoor-heat source unit fan control2. Inverter frequency control3. Indoor unit LEV, LEV1,LEV2a, LEV2b control4. Solenoid valve control5. 7...

- 173 - HWE09080 GB VIII Test Run Mode [1] Items to be checked before a Test Run ......................................................................... 175 [2] Test Run Method ........................................................................................................... 176 [3] Opera...

[ VIII Test Run Mode ] - 175 - HWE09080 GB VIII Test Run Mode [1] Items to be checked before a Test Run (1) Check for refrigerant leak and loose cables and connectors. (2) Measure the insulation resistance between the power supply terminal block and the ground with a 500V megger and make sure it rea...

[ VIII Test Run Mode ] - 176 - HWE09080 GB [2] Test Run Method The figure shows an MA remote controller (PAR-21MAA). PAR-21MAA ON/OFF FILTER CHECK OPERATION CLEAR TEST TEMP. MENU BACK DAY MONITOR/SET CLOCK ON/OFF Set Temperature buttons Down Up Operation Mode button ON/OFF button Fan Speed button Te...

[ VIII Test Run Mode ] - 177 - HWE09080 GB [3] Operating Characteristic and Refrigerant Amount It is important to have a clear understanding of the characteristics of refrigerant and the operating characteristics of air conditioners before attempting to adjust the refrigerant amount in a given syste...

[ VIII Test Run Mode ] - 179 - HWE09080 GB (2) Example: PQHY-P144TSHMU-A/YSHMU-A (3) Sample calculation CAUTION Charge liquid refrigerant (as opposed to gaseous refrigerant) into the system. ΠIf gaseous refrigerant is charged into the system, the composition of the refrigerant in the cylinder will ...

[ VIII Test Run Mode ] - 181 - HWE09080 GB (2) Example (3) Sample calculation BC controller BC controller(HB) BC controller(HB) Indoor a C b H H′ h1 h1 (P06 - P54) Junction pipe kit(CMY-R160-J)(Optional accessory) Branch joint(CMY-Y102S-G2) B c d f h3 D E Branch joint(CMY-Y202-G2)(CMY-Y102L-G2)(CMY-...

[ VIII Test Run Mode ] - 182 - HWE09080 GB [5] Refrigerant Amount Adjust Mode 1. Procedures <PQHY> Follow the procedures below to add or extract refrigerant as necessary depending on the operation mode. When the function switch (SW4-3) on the main board on the heat source unit (OC only) is tur...

[ VIII Test Run Mode ] - 183 - HWE09080 GB CAUTION Do not release the extracted refrigerant into the air. CAUTION Charge liquid refrigerant (as opposed to gaseous refrigerant) into the system. ΠIf gaseous refrigerant is charged into the system, the composition of the refrigerant in the cylinder wil...

[ IX Troubleshooting ] - 230 - HWE09080 GB [2] Responding to Error Display on the Remote Controller 1. Error Code Serial communication error 2. Error definition and error detection method Serial communication error between the control board and the INV board on the compressor.Detail code 01: Between...

[ IX Troubleshooting ] - 246 - HWE09080 GB 1. Error Code <Transmission power supply fault error detail FF (Heat source unit)> 2. Error definition and error detection method Transmission power output failure 3. Cause 1) Wiring failure2) Transmission power supply cannot output voltage because ov...

[ IX Troubleshooting ] - 249 - HWE09080 GB 1. Error Code Abnormal bus voltage drop (Detail code 108) 2. Error definition and error detection method If Vdc 160V or less is detected during Inverter operation. (S/W detection) 3. Cause, check method and remedy(1) Power supply environment Check whether t...

[ IX Troubleshooting ] - 250 - HWE09080 GB 1. Error Code Abnormal bus voltage drop (Detail code 108) 2. Error definition and error detection method If Vdc 289V or less is detected during Inverter operation. (S/W detection) 3. Cause, check method and remedy(1) Power supply environment Check whether t...

[ IX Troubleshooting ] - 257 - HWE09080 GB 1. Error Code Short-circuited IPM/Ground fault (Detail code 104) 2. Error definition and error detection method When IPM/IGBT short damage or grounding on the load side is detected just before starting the inverter. 3. Cause, check method and remedy Refer t...

[ IX Troubleshooting ] - 260 - HWE09080 GB 1. Error Code HIC bypass circuit outlet temperature sensor (TH2) fault (Heat source unit) Heat exchanger outlet temperature sensor (TH3) fault (Heat source unit) Discharge temperature sensor (TH4) fault (Heat source unit) Accumulator inlet temperature senso...

[ IX Troubleshooting ] - 267 - HWE09080 GB 1. Error Code Transmission processor hardware error 2. Error definition and error detection method Although "0" was surely transmitted by the transmission processor, "1" is displayed on the transmission line. The address/attribute appeared o...

[ IX Troubleshooting ] - 278 - HWE09080 GB 1. Error Code No response error 2. Error definition and error detection method ΠWhen no response command is returned although acknowledgement (ACK) is received after transmission, an error is detect- ed. ΠWhen the data is transmitted 10 times in a row wit...

[ IX Troubleshooting ] - 283 - HWE09080 GB 1. Error Code Total capacity error 2. Error definition and error detection method The model total of indoor units in the system with one heat source unit exceeds limitations. 3. Error source, cause, check method and remedy, 7100 Error source Cause Check met...

[ IX Troubleshooting ] - 285 - HWE09080 GB 1. Error Code Wrong number of connected units 2. Error definition and error detection method The number of connected indoor units is "0" or exceeds the allowable value. 3. Error source, cause, check method and remedy 7102 Error source Cause Check me...

[ IX Troubleshooting ] - 287 - HWE09080 GB 1. Error Code Port setting error 2. Error definition and error detection method The port with wrong number is connected to the indoor unit.The model total connected to the port is greater than the specifi-cation. 3. Cause, check method and remedy 7107 Error...

[ IX Troubleshooting ] - 290 - HWE09080 GB -1- Troubleshooting according to the remote controller malfunction or the external input error In the case of MA remote controller 1. Phenomena Even if the operation button on the remote controller is pressed, the display remains unlit and the unit does not...

[ IX Troubleshooting ] - 291 - HWE09080 GB In the case of MA remote controller 2. Phenomena When the remote controller operation SW is turned on, the operation status briefly appears on the display, then it goes off, and the display lights out immediately, and the unit stops. (1) Cause 1) The power ...

[ IX Troubleshooting ] - 294 - HWE09080 GB In case of ME remote controller 1. Phenomena Even if the operation button on the remote controller is pressed, the display remains unlit and the unit does not start running.(Power indicator does not appear on the screen.) (1) Cause 1) The power for the M-NE...

[ IX Troubleshooting ] - 295 - HWE09080 GB In case of ME remote controller 2. Phenomena When the remote controller operation SW is turned on, a temporary operation display is indicated, and the display lights out immediately. (1) Cause 1) The power is not supplied to the indoor unit. ΠThe main powe...

[ IX Troubleshooting ] - 298 - HWE09080 GB Both for MA remote controller and ME remote controller 1. Phenomena Although cooling operation starts with the normal remote controller display, the capacity is not enough (1) Cause, check method and remedy Cause Check method and remedy 1. Compressor freque...

[ IX Troubleshooting ] - 300 - HWE09080 GB 2. Phenomena Although heating operation starts with the normal remote controller display, the capacity is not enough. (1) Cause, check method and remedy Cause Check method and remedy 1. Compressor frequency does not rise sufficiently. ΠFaulty detection of ...

[ IX Troubleshooting ] - 302 - HWE09080 GB 3. Phenomena Heat source unit stops at times during operation. (1) Cause, check method and remedy Cause Check method and remedy The first stop is not considered as an error, as the unit turns to anti-restart mode for 3 minutes as a pre-liminary error. (1) C...

[ IX Troubleshooting ] - 303 - HWE09080 GB [3] Investigation of Transmission Wave Shape/Noise 1. M-NET transmission Control is performed by exchanging signals between the heat source unit and the indoor unit (ME remote controller) through M-NET transmission. Noise interference on the transmission li...

[ IX Troubleshooting ] - 305 - HWE09080 GB 2. MA remote controller transmission The communication between the MA remote controller and the indoor unit is performed with current tone burst. (1) Symptoms caused by noise interference on the transmission line If noise is generated on the transmission li...

[ IX Troubleshooting ] - 306 - HWE09080 GB [4] Troubleshooting Principal Parts -1- High-Pressure Sensor (63HS1, PS1, PS3) 1. Compare the pressure that is detected by the high pressure sensor, and the high-pressure gauge pressure to check for failure. By configuring the digital display setting switch...

[ IX Troubleshooting ] - 309 - HWE09080 GB Refrigerant Circuit diagram <PQHY> 1 2 3 4 5 1 2 3 4 5 2 3 4 5 Solenoid valve block(three compartments) 1 is located behind 3 TH3 CV8 CV6a TH8 TH7 SV7b SV7a CV4a CV3a CV7a BV2 SV4a SV4b SV4d Solenoid valve block THINV Component coolerheat exchanger LE...

[ IX Troubleshooting ] - 310 - HWE09080 GB (4) In the case of SV9 (Bypass valve) This solenoid valve opens when energized (when the relay is on)This valve turns on when the value of 63HS1 is greater than 3.5 MPa [507psi] during Heating-only or Heating-main operation at the minimum frequency. The val...

[ IX Troubleshooting ] - 311 - HWE09080 GB 2) Pulse signal output and valve operation 3) LEV valve closing and opening operation Note. The connector numbers on the intermediate connector and the connector on the control board differ. Check the color of the lead wire to judge the number. Heat source ...

[ IX Troubleshooting ] - 312 - HWE09080 GB (2) Heat source LEV (LEV1,LEVINV) The valve opening changes according to the number of pulses. 1) Connections between the heat source control board and LEV 2) Pulse signal output and valve operation 3) LEV valve closing and opening operation LEV DC 12V Heat...

[ IX Troubleshooting ] - 313 - HWE09080 GB (3) Judgment methods and possible failure mode The specifications of the heat source unit (heat source LEV), indoor unit (indoor LEV),and BC controller (BC controller LEV) differ.Therefore, remedies for each failure may vary. Check the remedy specified for ...

[ IX Troubleshooting ] - 314 - HWE09080 GB (4) Heat source unit LEV (LEV1,LEVINV) coil removal procedure 1) LEV component As shown in the figure, the heat source LEV is made in such a way that the coils and the body can be separated. 2) Removing the coils Fasten the body tightly at the bottom (Part ...

[ IX Troubleshooting ] - 315 - HWE09080 GB (5) Heat source unit LEV (LEV2a,2b) coil removal procedure Notes on the procedure 1) Do not put undue pressure on the motor.2) Do not use motors if dropped.3) Do not remove the cap until immediately before the procedure.4) Do not wipe off any molybdenum.5) ...

[ IX Troubleshooting ] - 316 - HWE09080 GB Replacement procedure 1) Stop the air conditioner. After checking that the air conditioner is stopped, turn off the power of the heat source unit.2) Prepare two spanners. Hold the valve body with one spanner and loosen the locknut with another one. Turning ...

[ IX Troubleshooting ] - 317 - HWE09080 GB -5- Troubleshooting Principal Parts of BC Controller 1. Pressure sensor Troubleshooting flow chart for pressure sensor Check whether the pressure sensor or the connectors of P1 and P3 are connected, properly All the compressors of the heat source units to w...

[ IX Troubleshooting ] - 319 - HWE09080 GB 2. Temperature sensor Pull out the thermistor connector in trouble from the board. Measure the temperature of the thermistor in trouble. (actual measurement value) Check the thermistor resistor. Compare the temperature corresponding to the resistance measur...

[ IX Troubleshooting ] - 324 - HWE09080 GB Troubleshooting flow chart for solenoid valve body 6 6 54321 54321 251346 To LEV LED 10 k Start Brown Red Blue Orange Yellow White Brown Red Blue Orange Yellow White OK? NO YES OK? NO YES Repair the fault. Repair the fault. OK? NO YES OK? NO YES Replace LEV...

[ IX Troubleshooting ] - 327 - HWE09080 GB 4. BC controller transformer * Before measuring the resistance, pull out the connector. Normal Abnormal CNTR(1)-(3) about 58 ohm. Open-phase or shorting CN03(1)-(3) about 1.6 ohm. CNTR CN03 BC controller control board Red White Red Red

[ IX Troubleshooting ] - 328 - HWE09080 GB -6- Inverter (THMU-A) ΠReplace only the compressor if only the compressor is found to be defective. (Overcurrent will flow through the inverter if the compressor is damaged, however, the power supply is automatically cut when overcurrent is detected, prote...

[ IX Troubleshooting ] - 331 - HWE09080 GB (3) Trouble treatment when the main power breaker is tripped. (4) Trouble treatment when the main power earth leakage breaker is tripped The insulation resistance could go down to close to 1Mohm after installation or when the power is kept off for an extend...

[ IX Troubleshooting ] - 332 - HWE09080 GB (5) Simple checking procedure for individual components of main inverter circuit Before checking, turn the power off and remove the parts to be checked from the control box. Part name Judgment method Rush current protection resis-torR1(R2) Measure the resis...

[ IX Troubleshooting ] - 336 - HWE09080 GB (3) Trouble treatment when the main power breaker is tripped (4) Trouble treatment when the main power earth leakage breaker is tripped The insulation resistance could go down to close to 1Mohm after installation or when the power is kept off for an extende...

[ IX Troubleshooting ] - 343 - HWE09080 GB [5] Refrigerant Leak 1. Leak spot: In the case of extension pipe for indoor unit (Cooling season)<PQHY> 1) Mount a pressure gauge on the service check joint (CJ2) on the low-pressure side.2) Stop all the indoor units, and close the liquid service valv...

[ IX Troubleshooting ] - 344 - HWE09080 GB 2) Therefore, if the power source is turned off within 30 minutes, the lev remains fully closed and the refrigerant remains sealed. When only the power for the indoor unit is turned off, the indoor unit LEV turns from faintly open to fully closed. 3) In the...

[ IX Troubleshooting ] - 345 - HWE09080 GB 5. Leak spot: In the case of extension pipe for indoor unit (Cooling season)<PQRY> 1) Mount a pressure gauge on the service check joint (CJ2) on the low-pressure side.2) Stop all the indoor units, and close the high-pressure side refrigerant service v...

[ IX Troubleshooting ] - 347 - HWE09080 GB [6] Compressor Replacement Instructions 1. Compressor Replacement Instructions Follow the procedures below (Steps 1 through 5) to remove the compressor components and replace the compressor. Reassemble them in the reverse order after replacing the compresso...

[ IX Troubleshooting ] - 351 - HWE09080 GB (2) Replacement procedures for check valve assembly ● Removing the check valve assembly Remove the check valve (CV8), elbow, and the pipe shown in the figure below at left by removing the brazing flux from the sections that are indicated with arrows. Check ...

[ IX Troubleshooting ] - 352 - HWE09080 GB *A connecting pipe is required only when the pipe section that is circled in the figure above looks like the one shown inthe figure above in the middle entitled "Pipe type A." Cut the pipe here. Check valve assembly Connecting pipe Pipe type A Pipe ...

[ IX Troubleshooting ] - 353 - HWE09080 GB [7] Servicing the BC controller 1. Service panel 2. Control box *Special care must be taken when replacing heavy parts. Work procedure Explanatory figure 1) Remove the two lock nuts on the control box, loosen the other two, and remove the control box. 2) Re...

[ IX Troubleshooting ] - 355 - HWE09080 GB 5. LEV 6. Solenoid valve Work procedure Explanatory figure (1) Remove the service panel.(Refer to 1. 1) - 3) (2) Replace the LEV in trouble. Secure enough service space in the ceiling for welding operation, and conduct the work carefully.If required, dismou...

[ IX Troubleshooting ] - 356 - HWE09080 GB [8] Troubleshooting Using the Heat source Unit LED Error Display If the LED error display appear as follows while all the SW1 switches are set to OFF, check the items under the applicable item numbers below. 1. Error code appears on the LED display. Refer t...

- 357 - HWE09080 GB X LED Monitor Display on the Heat source Unit Board [1] How to Read the LED on the Service Monitor ............................................................... 359

[ X LED Monitor Display on the Heat source Unit Board ] - 359 - HWE09080 GB X LED Monitor Display on the Heat source Unit Board [1] How to Read the LED on the Service Monitor 1. How to read the LED By setting the DIP SW 1-1 through 1-10 (Switch number 10 is represented by 0), the operating condition...

[ X LED Monitor Display on the Heat source Unit Board ] - 360 - HWE09080 GB 3. Time data storage function The heat source unit has a simple clock function that enables the unit to calculate the current time with an internal timer by receiving the time set by the system controller, such as G(B)-50A.I...

[ X LED Monitor Display on the Heat source Unit Board ] - 362 - HWE09080 11 11 01 000 00 0 Ex te rnal si gn al (O pe n i npu t c o n ta c t po in t) Con tact po in t d e - mand Lo w- noi s e mode (C apa ci ty p ri o ri ty ) Coo lin g - he at ing ch an geo ve r (C oo ling ) C o ol in g- h eat in g ch...

[ X LED Monitor Display on the Heat source Unit Board ] - 372 - HWE09080 Error history No . SW1 Ite m Disp la y Unit (A , B) *1 Re m a rk s 12 34 567 89 0 L D1 LD 2 L D3 LD4 L D 5 L D6 L D 7 L D 8 O C OS 20 1 1 0 0 1 001 10 0 He at sou rc e un it op er a- ti on st at us B C op er a- ti on si gn al 3...

[ X LED Monitor Display on the Heat source Unit Board ] - 386 - HWE09080 Setting data No . SW1 Ite m Disp la y Unit (A , B ) *1 Re m a rk s 12 34 567 89 0 L D1 LD 2 L D3 LD4 L D 5 L D6 L D 7 L D 8 O C OS 51 2 0 0 0 0 000 00 1 S e lf- ad dr es s A lt er nat e d is p la y of s e lf a d d re s s a n d ...

[ X LED Monitor Display on the Heat source Unit Board ] - 403 - HWE09080 Oth e r typ es of dat a No . SW1 It em Display Unit (A , B) *1 Rema rk s 12 345 67 89 0 L D1 L D 2 L D3 LD 4 L D5 LD6 L D 7 L D8 OC OS 86 4 0 0 000 11 01 1 86 5 1 0 000 11 01 1 86 6 0 1 000 11 01 1 86 7 1 1 000 11 01 1 86 8 0 0...