FRESH MASTER - mitsubishitech.co.uk
Contents
1. Thermistor Cord clip Cord clip Thermistor PT screw 4x8 BS Y55 012 213 R50 399 223 R50 399 224 Y55 012 214 HOO 011 008 50 to 105 C 50 to 105 C Lock washer 4 Transformer PT screw 4x8 PPT screw 4x20 Terminal block 013 076 Y55 001 217 000 349 HOO 141 005 Y55 011 217 With lead wires Cord band TB fix plate Control cover Wiring diagram Side plate K83 170 228 Y55 011 693 R50 429 693 Y55 012 367 Y55 011 695 White Bush PPT screw 3x8 Circuit board PCB fix plate Capacitor K82 163 225 003 005 Y55 007 171 R50 327 730 Y50 118 289 FU MO5 D1 9 0uF 440VAC Capacitor Cement resistor PCB fix plate Y55 012 287 Y55 003 215 Y55 011 694 a f I QA lI Il Il Md sd c NIN G NASA rn gt 7 0UF 440VAC2. WIZ 10 digit 1 dig 12 V DC transmission cable M NET as El Shielded part S Address switch Tens digit Function switch 3 Branch No switch Function switch 1 Function switch 2 Address switch Ones digit Troubleshooting Bl Work precautions When servicing be sure to recreate the malfunction two or three times before starting repairs When servicing always keep proper footing When servicing make sure that the power supply isolator is off so as no electrical shock or injury to occur Pay sufficient attention when working on the product Always connect the power wires properly When removing the circuit board always hold it at both ends and remove carefully so as not to apply force to the surface mounted parts When removing the circuit board be careful of the metal edges on the board When removing or inserting the connectors for the circuit board hold the entire housing section Never pull on the lead wires If it is thought that there is a printed circuit board malfunction check for disconnected wires in the print pat tern burnt parts or discoloration If the printed circuit board is replaced make sure that the switch settings on the new board are the same as the old board When servicing or checking around the humidifying unit make sure to close the service valve 1 Troubleshooting 1 The system will not start properly Initia
3. YELLOW T VIA MA Lev osa YELLOW CN60 MD ler GREY Gral THL OA GREY CN20 LED3 BLACK TH4 RA BLACK CN22 LED2 M NET transmission cable Swe To Outdoor Unit BC Controller as o LETAL ETA Fresh Master rae tts vum CN29 LED E 1919097191 MET Renote controller Linvid BIN TIT Anar wi ield wire reb Golem be O O om m BNOTE 1 TM TM2 shown in dotted lines are field work 2 Be sure to connect the grounding wire mWarning a 3 Isolator should be provided by the customer i ore n E n 4 MARK O indicates terminal block O connector A IA 0 board insertion connector or fastening connector f control board mSymbol explanation Symbol Name Symbol Name Symbol ame M1 Fan motor exhaust RSV Resistance solenoid valve AB NET transmission terminal M2 Fan motor supply TM1 Terminal block power supply S Shield C Capacitor TM2 block transmission CND1 CND2 Connector power supply W S Water sensor Terminal block humidistat monitor X02 X09 Relay SV1 Solenoid valve pressure regulator SW Switch function selection TR Transformer SV2 Solenoid valve exhaust SW2 Switch capacity code setting G Damper motor TH1 Thermistor outdoor air temp detection SW3 Switch function selection LS Limit switch
4. 16 pcs 4 pcs 2pcs 2pcs shows accessory parts 42 GUF 100RD GUF 100RD4 Name of part Spl screw 4x11 Maint cover Spl screw 4x12 Core guide Filter stopper Parts No M34 074 017 R50 543 487 HOO 000 488 R50 219 381 R50 522 710 Q ty pcs unit Critical for safety Remarks ON OAR Q N PTT screw 4x8 Fix piece Fix plate Filter Core guide H00 000 487 R50 429 700 R50 430 695 R50 522 717 R50 481 381 Lossnay core Flange PT screw 6x12 Hanger Cover R50 544 710 R50 430 609 000 244 R50 054 383 R50 543 704 FN a O With filter stoppers Hinge Fix piece Heat exchanger Expansion valve Thermistor R50 466 344 Y50 029 712 R50 473 699 R50 474 737 R40 632 936 For the gas pipe Thermistor Cover left Cover center Cover right H elem cover R40 647 340 R50 531 693 R50 531 696 R50 531 697 R50 430 694 o 3 cA c A M gt od For the liquid pipe PTT screw 5x10 H elem cover Spl screw 4x12 Water sensor Special washer HOO 189 007 R50 430 486 M35 282 045 Y55 011 218 K81 602 035 O With lead wires PTT screw 4x8 Fix plate Cover B Cover A Cord band H00 260 045 Y55 012 692 Y55 011 696 Y55 011 692 R50 530 228 Heat insulator Heat insulator R50 530 699 R50 530 700 N NI T a 09 N Air exhaust fan assembly
5. Limit switch RA thermistor 5 V DC Gas pipe thermistor Liquid pipe thermistor 22222223 LEV LED3 On when M NET line power is on LED2 On when MA remote controller power is on SWI2 SW3 Function selection l digit 1 wa Swi AE Function switch 3 Function switch 1 LED1 Address switch Branch No switch Function switch 2 On when power is on Tens digit Address switch Ones digit 2 GUF 100RDH4 60 Supply fan Common Exhaust fan Common Supply fan 220 V AC 60 Hz Power supply 220 V AC 60 Hz Fuse 6 3 A 250 V Transformer primary input Transformer secondary output 16 to 23 V AC high low External humidifier control input Operation monitor output Q when stopped 0 Q during operation 220 V AC Exhaust fan high 60 Hz low Solenoid value Full wave rectified voltage of 220 V AC 60 Hz OA thermistor Damper motor 220 V AC 60 Hz Water sensor Limit switch RA thermistor Gas pipe thermistor 9 HABETFM OLI 10680 V END LED3 On when M NET line power is on LED2 On when MA remote controller power is on LED1 On when power is on MA remote controller transmission cable 14 V DC M NET transmission cable Error monitor output Q normally 0 Q when there is an error 55555555 Y
6. 44 GUF 100RD4 GUF 100RD4 Name of part Spl nut 12 Washer 12 Centrifugal fan Fan base Inlet ring Parts No R50 218 067 K83 466 113 R50 479 480 R50 480 707 R50 264 711 Q ty pcs unit Critical for safety Remarks Left handed 245 PT screw 6x20 Spl washer 6 Spacer Bush Motor fix plate HOO 157 008 M34 043 080 R50 000 095 R50 217 225 R50 218 712 Key Motor Nut 6 Motor Y50 033 104 Y55 012 454 061 050 Y55 012 453 N N N O 0 0 0N N N N NM 5x5x11 5 100 A E e Pd pa ge a 6 2 2 2 101 b e lt 86 d 85 Qu 99 46 GUF 100RD4 GUF 100RD4 Name of part Fix piece Motor cover Bush Damper motor Special bush Parts No R50 533 693 Y50 151 706 Y50 115 225 Y50 061 260 R50 054 225 Q ty pcs unit Critical for safety Remarks AC220 240V Rod Pull spring Damper support Damper Special bush R50 265 150 R50 074 156 R50 473 715 R50 473 716 M31 234 089 Thermistor Cord clip Cord clip Thermistor PT screw 4x8 BS Y55 012 213 R50 399 223 R50 399 224 Y55 012 214 HOO 011 008 50 to 105 C 50 to 105 C Lock washer 4 Transformer PT screw 4x8 PPT screw 4x20 Terminal block 013 076 Y55 001 217 000 349 HOO 141 005 Y55 011 217 3P With lead wires Cord band TB fix plate Control cover Wiring diagram Side plate K83 170 228
7. Y55 011 693 R50 429 693 Y55 011 368 Y55 011 695 White Bush PPT screw 3x8 Circuit board PCB fix plate Capacitor K82 163 225 003 005 Y55 007 171 R50 327 730 Y50 118 289 FU MO5 D1 9 04F 440VAC Capacitor PCB fix plate Y55 012 287 Y55 011 694 a gt Gi a I cl l NIN GW N 2 2 N gt 7 0UF 440VAC GUF 100RDH4 16 pcs 5 pcs i 2pcs 2pcs shows accessory parts 48 GUF 100RDH4 GUF 100RDH4 Name of part Spl screw 4x11 Maint cover PTT screw 4x12 Core guide Filter stopper Parts No M34 074 017 R50 543 487 HOO 000 488 R50 219 381 R50 522 710 Q ty pcs unit Critical for safety Remarks 1 2 3 4 5 6 7 8 PTT screw 4x8 Fix piece Fix plate Filter Core guide H00 000 487 R50 429 700 R50 430 695 R50 522 717 R50 481 381 N Lossnay core Flange PT screw 6x12 Hanger Cover R50 544 710 R50 430 609 H00 000 244 R50 054 383 R50 543 704 FN p a O With filter stoppers Hinge Fix piece Cord band Heat insulator Heat insulator R50 466 344 Y50 029 712 R50 530 228 R50 530 699 R50 530 700 N N N AIN 50 GUF 100RDH4 GUF 100RDH4 Name of part Cover left Cover center Cover right H elem cover PTT screw 5x10 Parts No R50 531 693 R50 531 696 R50 531 697 R50 430 694 HOO 189 007 Q t
8. a fall Pronibited from any of the piping connections Wear gloves Water leakage may cause buildings to aD Wear gloves when servicing Soil leading to secondary failure of other parts Be sure to follow Failure to heed this caution may result in injury to your hands from sharp metal or other edges Be sure to follow this instruction Request for repair Inspect the earth condition and repair it if it is incomplete Make sure that an earth leakage breaker or an overload protection device is installed If it is not installed recommend the dealer to install one Make sure that the product operates properly upon completing repair work Clean the product and the surround ing area and then notify the customer of the completion of repair 2 Names and functions of components Direct expansion coil Permeable film humidifier Heats or cools the air supply after heat exchange Performs clean humidifying of the air supply High efficiency filters Optional parts after heat exchange Removes dust from the outside air Electronic expansion valve Not available on GUF 50 100RDa types Maintenance cover for humidifying Maintenance cover Control box Lossnay core Temperature and humidity are exchanged between supply air and exhaust air Duct connection flange L 7 7 Damper plate Switches between the Lossnay Ceiling suspension fixture ventilation and normal ve
9. is flashing in LCD There is no dry mode on the OA pro cessing unit Cannot set to dry mode from the remote controller When the unit is set to dry mode from the central controller the dry mode display flashes on the LCD and the OA processing unit fan operates 13 Use a mode other than dry mode 2 Troubleshooting 2 An error code is displayed on the remote controller See below for possible remedies when there is an error during test operation and followed by a 4 digit number is displayed on the remote controller Note The components marked with are available for GUF 50 100RDH4 types only Error code Error content Test run Is the test operation switch of either the fan bypass damper or humidifier sole noid valve turned ON Set the test operation switch SW1 1 7 8 to OFF Drain error Drain water is not properly discharged The body must be levelly installed The drain pipe must be installed with a gradient of more than 1 100 Is there a leak from the permeable film humidifier Fix the water leak Replace the humidifier element When no problem is found after check ing the above items Replace the circuit board Disconnected water sensor con nector Is the CNAD connector firmly connected Firmly connect the connector Is the relay connector between the circuit board and water sensor firmly connected Firmly connect the connector When no
10. with switches SW4 and SW5 is used as a ser vice part Assembly precaution After replacing the circuit board switches SW4 and SW5 indicated by O must be set to HIGH Otherwise the unit will not work HIGH 5 Humidifier Section Note GUF 50 100RD4 types are not equipped with the humidifier elements hose bands and tubes D Unscrew the screws seven PTT screws 5 x 10 H elem cover indicated by O to remove the humidifier H elem cover 2 Remove the H elem cover inside H elem cover inside 22 3 Remove the tubes from the humidifier elements elem 4 Holding the hose bands indicated by 1 to 6 with your fingers remove the tubes Referring to the pro cedure 5 below remove the tube at the rear while taking out the front humidifier elem Tube Precautions To remove the tubes hold and slide the hose bands and remove the tubes Do not remove the tube from the solenoid valve When removing the tubes be sure that water is collected on the drain pan inside the main unit 5 Remove the humidifier elems 2 23 Humidifier elem 6 Solenoid Valve and Water Sensor Section Note GUF 50 100RD4 types are not equipped with the solenoid valve and cover SOLV CD Remove the H elem covers See 5 to Cover left Cover center Cover right 2 Unscrew the screws eleven PTT
11. M34 706 465 Q ty pcs unit Critical for safety Remarks Left handed 220 Motor Motor fix plate Motor Y55 011 453 R50 351 713 Y55 011 454 gt N AIM N N N N 40 GUF 50RDH4 GUF 50RDH4 Name of part Fix piece Motor cover PTT screw 4x6 Bush Damper motor Parts No R50 533 693 Y50 151 706 H00 312 007 Y50 115 225 Y50 061 260 Q ty pcs unit amp e Critical for safety Remarks AC220 240V Special bush Rod Pull spring Damper support Damper R50 054 225 R50 232 150 R50 069 156 R50 472 716 R50 472 715 Special bush Thermistor Cord clip Cord clip Thermistor M31 234 089 Y55 011 215 R50 399 223 R50 399 224 Y55 011 216 50 to 105 C 50 to 105 C PT screw 4x8 BS Lock washer 4 Transformer PT screw 4x8 PPT screw 4x20 HOO 011 008 H00 013 076 Y55 001 217 000 349 HOO 141 005 Terminal block Cord band TB fix plate Control cover Wiring diagram Y55 011 217 K83 170 228 Y55 011 693 R50 429 693 Y55 011 367 3P With lead wires White Side plate Bush PPT screw 3x8 Circuit board PCB fix plate Y55 011 695 K82 163 225 003 005 Y55 007 171 R50 327 730 FU MO5 D1 Capacitor Cement resistor PCB fix plate Y55 011 287 Y55 003 215 Y55 011 694 an a Q9 ala 2 2 2 aja yon ND S Bb G AO Na 4 0uF 440VAC GUF 100RD4 ibo
12. O 0 0 0N N N N NM 5x5x11 5 54 GUF 100RDHa GUF 100RDH4 Name of part Fix piece Motor cover Bush Damper motor Special bush Parts No R50 533 693 Y50 151 706 Y50 115 225 Y50 061 260 R50 054 225 Q ty pcs unit Critical for safety Remarks AC220 240V Rod Pull spring Damper support Damper Special bush R50 265 150 R50 074 156 R50 473 715 R50 473 716 M31 234 089 Thermistor Cord clip Cord clip Thermistor PT screw 4x8 BS Y55 012 213 R50 399 223 R50 399 224 Y55 012 214 HOO 011 008 50 to 105 C 50 to 105 C Lock washer 4 Transformer PT screw 4x8 PPT screw 4x20 Terminal block 013 076 Y55 001 217 000 349 HOO 141 005 Y55 011 217 3P With lead wires Cord band TB fix plate Control cover Wiring diagram Side plate K83 170 228 Y55 011 693 R50 429 693 Y55 011 367 Y55 011 695 White Bush PPT screw 3x8 Circuit board PCB fix plate Capacitor K82 163 225 003 005 Y55 007 171 R50 327 730 Y50 118 289 FU MO5 D1 9 0uF 440VAC Capacitor Cement resistor PCB fix plate Y55 012 287 Y55 003 215 Y55 011 694 o X o c 9 a dd X I J A NN OCD G AIN gt AN 7 0UF 440VAC GUF 100RDH4 60 16 pcs 5 pcs i 2pcs 2pcs shows accessory parts 56 GUF 100RDHa 60 GUF 100RDH4 60 Name of p
13. TH2 Thermistor pipe temp detection liquid SW11 Switch 1st digit address set LED1 Power supply monitor TH3 Thermistor pipe temp detection gas SW12 Switch 2nd digit address set LED2 MA remote controller THA Thermistor room air temp detection SW14 Switch branch NO set Power supply monitor LEV Electronic linear expansion valve 1 2 Remote controller terminal LED3 M NET Power supply monitor 6 Circuit board diagrams Q Circuit board diagrams and check points lt FU M05 D4 gt D GUF 50RDa GUF 50RDHa GUF 100RD GUF 100RDH4 Fuse 6 3 A 250 V Transformer primary input Power supply Transformer secondary output 220 240 V AC 50Hz 16 to 23 V AC Supply fan FU M05 D Common MK m og MADE_IN JAPAN External humidifier control input Exhaust fan Common Operation monitor output Q when stopped 0 Q during operation Supply fan i 1 high Error monitor output PEEL ll 220 240 V AC 50 Hz low Q normally 0 Q when there is an error m 3 Exhaust fan hi m ex MA remote controller 220 240 V AC 1 S f transmission cable 50 Hz 3 14 V DC Solenoid value Full wave rectified voltage M NET of 220 240 V AC 50 Hz transmission cable GUF 50 100RDH types OA thermistor Te pe M NET ta EE pom rta transmission cable 2 1 Shielded part Water sensor GND
14. diagrams GUF 50RDa GUF 100RD4 TM POWER SUPPLY CND1 CND2 220 240V 50Hz FAN2L e ss 3 27 X06 Or o PI I SUPPLY FAN o FC 3 x07 Lag A FANE A Sud Mier 3 T lt E ftc Fan PEE oe d gt 4 ec ao m D _ a m 1 I X04 Lis Hi L 71 IEN CNST ok I EXHAUST FAN sI FUSE1 250V 6 I ES x ZNR901 1 9 X03 9 1 eration monitor outpu gt E MAX IN SI CNL MEAN IA AZ 100m E x DC 24V IA 0 5V 10004 j ORANGE al function monitor output i ORANGE MAX IN Ts s m YELLOW o DC 24V 1A 0 5V 10004 lt a YELLOW CN60 TM2 Lun Remote Controller I I I I I PAR gt W S GREY um O Tp iod TH1 0A GREY Me BLACK I 2 O BLACK tra
15. have been exceeded Make connections within the transmis sion cable power supply restrictions of the outdoor units or the power supply units See the technical manual for details about the restrictions Cool air or warm air does not come Out The LCD screen shows that it is in operation The restart protection delay circuit is in operation for 3 minutes Wait for a while To protect the compressor a 3 minutes delay circuit is built into the OA processing unit Therefore some times the compressor will not start operating immediately This delay may be up to 3 minutes OA processing unit operation has restarted following the heating and defrosting operation Wait for a while Heating operation starts after de frosting operation has ended It runs briefly but Soon stops The and check code flash es on the LCD screen The air inlet or outlet of the OA pro cessing unit and or outdoor unit is obstructed Restart after removing the obstruc tion The filters are clogged with dust and dirt Restart after cleaning the filters Does not humidify GUF 50 100RDH4 types only The OA processing unit is not set to the G heating mode Set to the heating mode Water is not supplied Open the service valve Dry mode cannot be set from the remote controller Dry mode can be set from the cen tral controller but does not operate Dry mode display
16. problem is found after check ing the above item Replace the circuit board Damper motor error Is the CNL connector firmly connected Firmly connect the connector Is the connector of the damper motor section firmly connected Firmly connect the connector Does the damper operate when the damper motor is running Replace the damper motor if it is not work ing When no problem is found after check ing the above items Replace the circuit board Fan motor error The motor continues to run when the operation is stopped Replace the circuit board Indoor temperature sensor error Liquid pipe temper ature sensor error Gas pipe tempera ture sensor error Outdoor tempera ture sensor error Are the connectors of each thermistor firmly connected s each relay connector firmly con nected When no problem is found after checking the above item Firmly connect each connector Firmly connect each connector Replace the circuit board Indoor unit address setting error There are duplicate address settings meaning there are indoor units with the same address Check the addresses of devices in the system Communication error Transmission processor HW error Any of the transmission cables of the indoor units Fresh Master or outdoor units was wired or the polarity was changed with the power ON Simultaneously turn OFF the power of t
17. screws 5 x 10 indicated by O to remove the cover left cover center and cover right 8 Disconnect the connectors for the thermistor lead wires and expansion valve lead wire Indicated by 4 Unscrew the screws two PTT screws 4 x 8 indi cated by A to remove the fix piece Fix piece Humidifier elem 8 Unscrew the screws two PTT screws 4 x 8 indi Fix plate cated by O to remove the fix plate f v fal 24 6 Disconnect the connectors for the solenoid valve lead wires and water sensor lead wires Remove the pipe connected to the solenoid valve Loosen the screw one PTT screw 4 x 8 indicated by O to remove the cover SOLV 9 Unscrew the screws two PTT screws 4 x 8 indicat ed by O to remove the cover B and solenoid valve from the unit n5 Water sensor and solenoid valve installation positions C A Connector for Connector for the solenoid valve the water sensor The heat exchanger is exceptionally removed for easy understanding Cover SOLV Y The heat exchanger is exceptionally removed for easy understanding Cover B The heat exchanger is exceptionally removed for easy understanding Unscrew the screws two PTT screws 4 x 8 indi The heat exchanger is exceptionally removed for easy understanding cated by O to remove the water sensor Water sensor 7 Heat Exchanger Section C
18. the outdoor unit remote controller when power is supplied to the Power is not supplied to the trans mission cable that connects indoor units and an outdoor unit Check the settings of the outdoor unit See the City Multi databook for details system When PAR F27MEA is Faulty connection of the M NET transmission cable See Table 1 2 used The number of Fresh Masters indoor units or remote controllers connect ed to the transmission cable exceeds the power supply capacity of the outdoor unit Connect Fresh Masters indoor units or remote controllers within the pow er supply capacity of the outdoor unit See the City Multi databook for de tails State of machine Does not operate Remote controller The power display does not appear on the remote controller when power is supplied to the system When PAR F27MEA is used When a power supply unit is used DThe power supply unit is not con nected with the transmission cable 2The power supply unit is not turned on The length of the M NET transmis sion cable wiring from the power supply unit is longer than specified longer than 200 m CDConnect the power supply unit with the transmission cable Check the power of the power sup ply unit Check the length of the transmis sion cable wiring See the technical manual for details about the regula tions The transmission cable power supply restrictions
19. to the terminals Connect them securely Are the signal cables connected to the specified terminal blocks Operation monitor TM3 9 Malfunction monitor 2 Connect them to the specified terminal blocks Output Maximum rating Are the output capacities of the operation monitor and malfunction moni tor within the ratings Minimum rating Operation monitor 240VAC 1A 24V DC 1A 220 V AC 100 mA 5 V DC 100 mA Malfunction monitor 240VAC 1A 24V DC 1A 220 V AC 100 mA 5 V DC 100 mA Table 2 State of machine Does not operate Remote controller Remote control ler display does not appear Power is not supplied to Fresh Master or power that does not follow specifications is used Use them within the ratings Check the power supply to Fresh Master Refer to Table 1 1 The power dis play does not appear on Is there a connection of 3 or more re mote controllers or 16 or more Fresh Master units Check the number of units con nected the remote con troller When PAR 21MAA is used The remote controller is connected to TM2 B terminal block for M NET transmission cable Connect the transmission cable to TM2 CD The power display does not appear on the The power of the outdoor unit is not turned on ME remote controller is powered by the outdoor unit Turn on the power of
20. valve High efficienioy opening opening Heat exchange unit space Y Yen 1____ Humidifying element installation po Maintenance space ur High efficiency filter Optional part Control box Heat exchanger 79 S Water intake Upper location at which the ceiling y suspension fixture can be installed for GUF 100 types Ceiling suspension fixture Location at which the duct direction can be changed Air filters Humidifying element I DA Discharge hole Water intake strainer with check valve PT1 2 External thread ats cover Gas pipe Liquid pipe Drain discharge hole VP25 connection The components marked with are available for GUF 50 100RDH42 types only External Ceiling suspen ext Inspection t dimension sion fixture pitch Duct connection flange Duct pitch Humidification opening Weight ode Nominal kg B C D E F diameter H J K L MIN 5 T GUF 50RD4 54 GUF 50RDH 1288 1016 317 1185 1048 22 200 158 5 192 208 745 372 5 435 124 347 135 99 266 450 57 GUF 100RD4 92 GUF 100RDHa 1580 1231 398 1465 1271 16 250 199 242 258 920 460 670 149 361 169 110 280 600 98 GUF 100RDH 60 Unit mm 5 Electrical wiring
21. 0 095 380 R50 542 706 N FAA al With filter stoppers Hinge Fix piece Heat exchanger Expansion valve Thermistor R50 466 344 Y50 029 712 R50 472 699 R50 474 737 R40 632 936 For coolant For the gas pipe Thermistor Cover left Cover center Cover right H elem cover R40 647 340 R50 530 691 R50 530 692 R50 530 694 R50 429 698 c cl amo ccc cM Ae For the liquid pipe PTT screw 5x10 Strainer Pipe Spl screw 4x12 Water sensor HOO 189 007 R50 395 319 R50 429 303 M35 282 045 Y55 011 214 With lead wires Special washer PTT screw 4x8 Fix plate Cover B Solenoid valve K81 602 035 260 045 Y55 011 698 Y55 011 696 Y55 011 213 Al hb e 200V With a drain valve Cord band Drain tube Cord bush Cover A Cover SOLV D40 007 344 R50 530 388 M45 649 226 Y55 011 692 Y55 011 697 Hose band Tube Hose band Tube Tube R50 117 223 R50 429 390 R50 261 223 R50 428 390 R50 429 389 H elem cover Humidifier elem Heat insulator Heat insulator R50 429 486 R50 261 714 R50 530 699 R50 530 700 RO PO DO 2 So ana naa With packing Air supply fan assembly Air exhaust fan assembly GUF 50RDH4 GUF 50RDH4 Name of part Special nut 8 Tab washer Centrifugal fan Fan base Spl washer 10 Parts No R50 331 067 M34 398 077 R50 351 480 R50 478 707
22. 2 699 R50 474 737 R40 632 936 For coolant For the gas pipe Thermistor Cover left Cover center Cover right H elem cover R40 647 340 R50 530 691 R50 530 692 R50 530 694 R50 429 698 I2 l2 c c2 s AR For the liquid pipe PTT screw 5x10 H elem cover Spl screw 4x12 Water sensor Special washer HOO 189 007 R50 429 486 M35 282 045 Y55 011 218 K81 602 035 C With lead wires PTT screw 4x8 Fix plate Cover B Cover A Heat insulator 260 045 Y55 011 698 Y55 011 696 Y55 011 692 R50 530 699 Heat insulator R50 530 700 NIN gt a 009 N Air supply fan assembly Air exhaust fan assembly GUF 50RD4 GUF 50RD4 Name of part Special nut 8 Tab washer Centrifugal fan Fan base Spl washer 10 Parts No R50 331 067 M34 398 077 R50 351 480 R50 478 707 M34 706 465 Q ty pcs unit Critical for safety Remarks Left handed 220 Motor Motor fix plate Motor Y55 011 453 R50 351 713 Y55 011 454 gt N AIM N N N N 34 GUF 50RD4 GUF 50RD4 Name of part Fix piece Motor cover PTT screw 4x6 Bush Damper motor Parts No R50 533 693 Y50 151 706 H00 312 007 Y50 115 225 Y50 061 260 Q ty pcs unit amp e Critical for safety Remarks AC220 240V Special bush Rod Pull spring Dampe
23. 26 Y55 011 692 Solenoid valve Cord band Drain tube Cover SOLV Hose band Y55 011 213 D40 007 344 R50 530 388 Y55 011 697 R50 117 223 200V With a drain valve Tube Hose band Tube Tube H elem cover R50 429 390 R50 261 223 R50 428 390 R50 430 389 R50 430 486 Humidifier elem Rod R50 261 714 R50 270 705 Abba Aa A oD ala aaa aa naaa With packing GUF 100RDH4 60 GUF 100RDH4 60 Name of part Spl nut 12 Washer 12 Centrifugal fan Fan base Inlet ring Parts No R50 218 067 K83 466 113 R50 479 480 R50 480 707 R50 264 711 Q ty pcs unit Critical for safety Remarks Left handed 245 PT screw 6x20 Spl washer 6 Spacer Bush Motor fix plate 157 008 M34 043 080 D40 135 095 R50 217 225 R50 264 712 Key Motor Nut 6 Motor Motor fix plate Y50 033 104 Y55 012 455 061 050 Y55 012 453 R50 218 712 5x5x11 5 Spacer R50 000 095 Ble A WANA OO N N N N N 62 GUF 100RDHa 60 GUF 100RDH4 60 Name of part Fix piece Motor cover Bush Damper motor Special bush Parts No R50 533 693 Y50 151 706 Y50 115 225 Y50 061 260 R50 054 225 Q ty pcs unit Critical for safety Remarks AC220 240V Rod Pull spring Damper support Damper Special bush R50 265 150 R50 074 156 R50 473 715 R50 473 716 M31 234 089
24. D Remove the covers left center and right and the H elem covers gt See 6 to 2 Disconnect the lead wire connectors indicated by O Lead wire for the expansion valve LEV and lead wires for the thermistors of the liquid and gas pipes 8 Unscrew the screws two PTT screws 4 x 8 indi cated by A Remove the fix piece and then replace the heat exchanger fix piece Heat exchanger Reassembly procedure 4 After inserting the new heat exchanger in the unit connect the lead wire connectors for the expansion valve LEV and for the thermistors of the liquid and gas pipes removed as shown in 7 2 Indicated by O Water stop steel plate Water stop resin 26 Hold the water stop resin with your fingers and hold the lead wires by the fix piece removed as shown in 7 Hook the fix piece on the slit of the heat exchanger Tighten the screws two PTT screws 4 x 8 indicated by A and secure the heat exchanger to the unit Set the lead wires u shaped as shown in the following picture indicated by O and secure the lead wires with the cord bands so as not to move the lead wires toward the cover side Assembly precaution If the lead wires are not secured condensed water may run down the read wires and result in water leak Slit of the heat exchanger Cord band x 6 Tighten the screws two PTT screws 5 x 10 indi cated by O to attach the co
25. May 2013 0189 FRESH MASTER HANDBOOK Model GUF 50RD4 GUF 50RDH4 GUF 100RD4 GUF 100RDH4 GUF 100RDH4 60 Nameplate Repair work must be performed by the manufacturer its service agent or a similarly qualified person in order to avoid hazards MITSUBISHI ELECTRIC CORPORATION oO ON O 0 Y N gt Contents Safety precautions mee 3 4 Names and functions of components mH 4 Specifications memes 5 Outside dimensions rss 6 Electrical wiring diagrams M 7 8 Circuit board diagrams emm Hee 9 10 Troubleshooting mmn 11 17 Overhauling procedures nennen 18 28 Parts catalog emen 29 63 CGUEDORDA SIE 30 35 G UE SSORDUEL sisi nen 36 41 GUE 100R DA Haren 42 47 GUETOORD 14 eee 48 55 GUF 400RDH4 60 ee en as 56 63 1 Safety precautions Read the following precautions thoroughly before the maintenance and then inspect and repair the product in a safe manner The types and levels of danger that may arise if the product is handled incorrectly are described with the warning symbols shown below Incorrect handling of the product N Wa rni ng result in serious injury or death lt gt Electric shock If you must inspect the circuitry while the power is on do not touch the live parts Caution against electric shock Failure to heed this warning may result in electric shock lt gt Turn off the power supply Be sure to shut off the power supply isolator before
26. art Spl screw 4x11 Maint cover PTT screw 4x12 Core guide Filter stopper Parts No M34 074 017 R50 543 487 HOO 000 488 R50 219 381 R50 522 710 Q ty pcs unit Critical for safety Remarks 1 2 3 4 5 6 7 8 PTT screw 4x8 Fix piece Fix plate Filter Core guide H00 000 487 R50 429 700 R50 430 695 R50 522 717 R50 481 381 N Lossnay core Flange PT screw 6x12 Hanger Cover R50 544 710 R50 430 609 H00 000 244 R50 054 383 R50 543 704 FN AA a gt O With filter stoppers Hinge Fix piece Cord band Heat insulator Heat insulator R50 466 344 Y50 029 712 R50 530 228 R50 530 699 R50 530 700 N N N AIN 58 GUF 100RDHa 60 GUF 100RDH4 60 Name of part Cover left Cover center Cover right H elem cover PTT screw 5x10 Parts No R50 531 693 R50 531 696 R50 531 697 R50 430 694 HOO 189 007 Q ty pcs unit Critical for safety Remarks Heat exchanger Thermistor Thermistor Expansion valve Strainer R50 473 699 R40 632 936 R40 647 340 R50 474 737 R50 395 319 For the gas pipe For the liquid pipe Pipe Spl screw 4x12 Water sensor Special washer PTT screw 4x8 R50 429 303 M35 282 045 Y55 011 214 K81 602 035 260 045 a fh a Ski om om om om e With lead wires Fix plate Lead wire clip Cover B Cord bush Cover A Y55 012 692 M30 409 356 Y55 011 696 M45 649 2
27. dis assembling the unit for repair Failure to heed this warning may result in electric shock Be sure to follow this instruction lt gt Modification is prohibited Do not modify the unit Failure to heed this warning may result in electric shock fire and or injury Prohibited lt Use proper parts and tools For repair be sure to use the parts listed in the service parts list of the applicable model and use the proper tools a Be sure to follow this instruction Failure to heed this warning may result in electric shock fire and or injury Q Do not mix anything other than the specified coolant of the same type used in the outdoor unit Do not charge any coolant different from the coolant used in the outdoor unit Failure to heed this warning may cause the pressure inside the freezing cycle to become abnormally high leading to injury or other damage Prohibited lt gt Proper electric work Use the electric wires designated for electric work and conduct electric work in accordance with the Electric Installation Engineering Standard the Indoor Wiring Regulations and the Installation Instructions QD Be sure to follow this instruction Improper connection or wiring installation may result in electric shock and or fire lt gt Toxic gas generation Be careful that the coolant RA07C R410A does not leak in a flammable environment Conduct welding operat
28. ew with spring washer PPT screw Cross recess tapping screw PCT screw Cross recess flat head tapping screw PTT screw Cross recess truss head tapping screw PT screw Cross recess truss head machine screw SET screw Slotted head stop screw SQ SET screw Square head stop screw SET screw Pan head stop screw PMT screw Primer truss head screw HS SET screw Hexagon head stop screw P R W screw Cross recess round wood screw P C W screw Cross recess flat head wood screw P R C W screw Cross recess round and flat wood screw R W screw Slotted round wood screw PW PP screw Cross recess pan head screw with small washer SW PW PP screw Cross recess pan head machine screw with spring washer and flat washer 29 GUF 50RD4 shows accessory parts 30 GUF 50RD4 GUF 50RD4 Name of part Spl screw 4x11 Maint cover PTT screw 4x12 Core guide Filter stopper Parts No M34 074 017 R50 542 486 H00 000 488 R50 216 381 R50 521 710 Q ty pcs unit Critical for safety Remarks ON O O Q N PTT screw 4x8 Fix piece Fix plate Filter Core guide H00 000 487 R50 429 700 R50 429 699 R50 521 717 R50 478 382 Lossnay core Flange PT screw 6x12 Hanger Cover R50 542 711 R50 028 610 H00 000 244 R50 095 380 R50 542 706 FN AA a al With filter stoppers Hinge Fix piece Heat exchanger Expansion valve Thermistor R50 466 344 Y50 029 712 R50 47
29. g from the power supply unit to the transmission cables is discon nected or the power supply unit is shut down Malfunction of the system controller MELANS Refer to the remedy for the single coolant System Check the error display LEDs of the out door unit When there is an error See the error code and follow the instruc tions described in the troubleshooting When there is no error Check the causes 5 to 7 written in the left See the service manual of the outdoor unit Check the voltage of the transmission cables for central control When the voltage is 20 V DC or more Check the causes 1 and 2 written in the left When the voltage is less than 20 V DC Check the cause 3 written in the left See the service manual of the outdoor unit Communication error No answer error The transmission cables were wired or the polarity was changed with the power ON QA transmission error repeatedly occurs due to noise or the like The voltage signal in the transmission cable drops because the length of the transmission cable wiring is longer than specified Maximum extension 500 m or less Power supply line must be 200 m or less ME remote controller wiring 10 m or less The voltage signal in the transmission cable drops because the transmission cable does not meet specification Cable diameter 1 25 to 2 0 mm Simultaneously turn OFF the power of the indoor units Fresh Ma
30. he indoor units Fresh Master and the outdoor units and then turn them ON again Specified power supply is not used Check the power supply Earth fault in the transmission cable Check the transmission cable wiring and shielding The setting of the outdoor unit is incorrect See the service manual of the outdoor unit Transmission data was changed due to noise in the transmission cable line Inspect the transmission waveform and noise in the transmission cable line Malfunction of a controller for the device in which the error occurs If the controller is normal it is a malfunc tion of the circuit board Error code Error content Communication er ror Bus busy error in the transmission line The transmission processor cannot transmit data because short period volt ages such as noise continuously occurs in the transmission cable line Inspect the transmission waveform and noise in the transmission cable line Malfunction of a controller for the device in which the error occurs If the controller is normal it is a malfunc tion of the circuit board in Fresh Master Replace the circuit board Communication error Handshake error Data was not transmitted correctly due to an accidental misoperation of the controller for the device in which the error occurs Simultaneously turn OFF the power of the indoor units Fresh Master and the outdoor units and then turn
31. ion in an open room If the coolant gas leaks open the windows while servicing lt gt Replace damaged and or degraded parts Be sure to replace the power supply cord and lead wires if they are damaged and or degraded Failure to heed this warning may result in electric shock and or fire Be sure to follow this instruction Be sure to completely repair the leak Close the service valve if the repair work is temporarily sus pended If the coolant gas comes into contact aD with flames such as open fire sparks and a heater it may generate toxic gas Be sure to follow this instruction lt Check insulation Upon completing repair work always measure the insulation resistance Verify that it is at least 10 MO with a 500 V DC insulation resistance tester and then turn on the power O Be sure to follow this instruction Inadequate insulation may result in electric shock Incorrect handling of the product may result in injury or N Caution damage to properties including buildings and equipment lt gt Caution for injury lt gt Prevent water leakage Do not work at a location where you do not have a Before removing any of the water related parts sure footing completely drain the residual water from the piping Q Upon completing repair work be sure to check the Failure to heed this caution may result in drainage of the indoor unit and that no water leaks
32. lization checklist from installation to operation Table 1 After checking the system check the checkpoints listed below Power supply Table 1 1 Checkpoint Is the main power supply on Turn on the main power supply Do the main power supply switching capacity and wiring diameter meet specification Use specified items Is the specified power supply of 220 to 240 V AC 220 V AC for GUF 100RDH4 60 connected to the power supply terminal TM1 Connect the specified power sup ply Has the fuse FUSE 1 on the circuit board blown Replace the circuit board Are connector CNT of the transformer primary input and connector CN3T of the transformer secondary output on the circuit board securely connected Connect them securely Is the power supply wiring incorrectly wired or is there a faulty connection Make secure connections Is power display LED1 red on the circuit board unlit Transmission cables Table 1 2 Check the above checkpoints Check the following checkpoints when connecting with the remote controller or M NET controller Checkpoint Do the transmission cables meet regulations Type diameter Action Use specified cables Is the transmission cable wired at least 5 cm away from the power supply cable Wire the transmission cable at least 5 cm away from the power supply cable Are multiple transmission or signal cables wired to the same power cable d
33. ly turn OFF the power of the outdoor units and Fresh Master and then turn them ON again In the case of the accidental malfunction the system returns to normal If the system does not return to normal check the causes 1 to 4 If none of the above causes applies check the error display LEDs of the other remote controllers or outdoor units When there is an error See the error code and repair troubled sections according to the instructions described in the troubleshooting When there is no error It is a malfunction of the circuit board in Fresh Master See the service manual of the outdoor unit Error code Error content Communication er ror No ACK error System connected with MELANS a Malfunction only in some of the units Refer to the causes for the single coolant system b Malfunction in all the indoor units and Fresh Master units in one coolant line CDCauses of total capacity error 7100 Causes of capacity code setting error 7101 Causes of the number of connected devices error 7102 4 Causes of Address setting error 7105 5 Short circuit or disconnection of the transmission cable to the terminal block for central control TB7 in the outdoor unit 6 The outdoor unit is shut down Fault in the electrical system of the outdoor unit c Malfunction in all the indoor units and Fresh Master units DThe above causes 1 to 7 The setting of the outdoor unit is incorrect 3 Wirin
34. nected with the switch SW3 1 OFF When the MA remote controller is directly connected to Fresh Master switch SW3 1 must be ON Booting system Have 10 minutes passed since system boot up After system boot up HO may flash for a maximum of 10 minutes However this is not a malfunction Has group registration been made Conduct group registration If there is a master system controller such as the cen tral controller use the controller to conduct group registration Has the Fresh Master address been changed If the Fresh Master main unit address has been changed conduct the group registra tion again When no problem is found after check ing the above items If HO continues to flash for more than 10 minutes after reregistering the group and rebooting replace the circuit board Unable to register Fresh Master which is linked with in door units cannot be group registered other than the interlock setting with the Remote controller Change the setting of the switch SW3 1 and reset the registration or register it as interlocked Operation display comes up with the Remote controller however it turns off immediately Main power is not supplied to Fresh Master 17 Supply Main Power 8 Overhauling procedures E Work precautions When touching the electric components such as circuit boards and fan motors do not touch the components for more than 5 min
35. nsmission cable swe pee To Dit BC Controller Gas YELLOW tea cae Fresh Master malt Gum 1 ons o D mit Remote controller SWi2 511 NE Ud qui ELLEELLE 9 Shield wire TH2 pipe J PINK CN21 my O TS 17777771777 p A EN IT m TT oe eaae m ENOTE 1 TM1 shown in dotted lines are field work 2 Be sure to connect the grounding wire mWarning Pp 3 Isolator should be provided by the customer ore 4 MARK O indicates terminal block O connector EA ELE EURER S Ol board insertion connector or fastening connector of control board sSymbol explanation Symbol ame Symbol Name Symbol ame M1 Fan motor exhaust TM Terminal block power supply S Shield M2 Fan motor supply TM2 Terminal block transmission NDL CND2 Connector power supply C Capacitor Terminal block humidistat monitor X02 X09 Relay W S Water sensor SW Switch function selection TR Transformer TH1 Thermistor outdoor air temp detection SW2 Switch capacity code setting G Damper motor TH2 Thermistor pipe temp detection liquid SW3 Switch function selection LS Limit switc TH3 Thermistor pipe temp detection gas SW11 Switch Ist digit address set LED1 Power supply monitor THA Thermistor room air temp detection SW12 Switch 2nd digit address set LED2 MA remote controller LEV Electronic linear expansion valve SW14 Switch branch NO set Power supply m
36. ntilation Discharge valve Service valve Water supply tube Supplies water to the permeable film humidifier Drain discharge hole Air filter Prevents clogs the Lossnay core Fan used to expel dirty air to outside of the room Strainer O ring installed Air supply fan Fan to supply outside air to the inside The illustration shows GUF 50RDH4 3 Specifications Powercon AE External air load heat alan Wer Frequency Current I processing capability kw Humidifying Weight quva en Model name supply indoor unit sumption mm s Cooling Heating volume k9 capability capability capability GUF 50RD4 235 265 33 5 34 5 GUF 50RDH4 Single 235 265 33 5 34 5 phase GUF 100RD4 220 240 480 505 38 39 GUF 100RDH4 480 505 38 39 GUF 100RDH4 60 685 40 5 The values given in the table for the noise level reflect the levels measured at a position 1 5 meters immediately below the unit in an anechoic chamber The noise at the air outlets at a 45 angle 1 5 meters in front is about 5 6 dB A higher than the values given in the table The above values apply during Lossnay ventilation when the fan speed is set to high speed Capability in is heat recovery capability by the Lossnay cores Cooling Heating capability indicates the maximum value at operation under the following condition C
37. onitor 1 2 Remote controller termina LED3 M NET Power supply monitor M NET transmission terminal GUF 50RDHa GUF 100RDHa GUF 100RDH4 60 A B GUF 50RDHa GUF 100RDHa 220 240 V 50 GUF 100RDH4 60 220 V 60 ro PONER SUPPLY _ PR CND1 py cr B FAN2 19 Diet fete 3 X06 SUPPLY FAN S Le 9 3 x i Aut ht NEN 3 T ISOLATOR sc FANII D ot 1l dd Ao ot TL I 1 I X04 3 yos EXHAUST FAN T3 1 EA T 6 3 u I 1 e mw b mE PURPLE 2NR902 OSAI ZNR901 distal D PURPLE RED de ro HUM dista RED ewe I Uncharged a contact RED 8 70 L p onc 1 240VAC more than JONA RSV 1kQ 1 MM 6 i monitor output AC220V 100m Rus CON 1A DC SV 100m oe CN27 monitor output Io N BROWN LS Zim AC220V 100nA
38. ooling Indoor 27 C DB 19 C WB Outdoor 35 C DB 24 C WB Heating Indoor 20 C DB 13 8 C WB Outdoor 7 C DB 6 C WB Mitsubishi Electric measures products according to Japan Industrial Standard JIS B 8628 In the United Kingdom on site measurements by pitot tube method could be as much 20 different from JIS test room conditions If the measuring point is close to sources of turbulence like bends contractions and dampers etc it is difficult to measure the air volume correctly A straight duct length more than 10D D duct diameter from the source of turbulence is recommended for correct measurement On site measurement should therefore be carried out in accordance with BSRIA guideline Commissioning Air Systems Application procedures for buildings AG3 89 3 2001 4 Outside dimensions Air exhaust fan GUF 50RDa GUF 50RDHa GUF 100RDa GUF 100RDHa GUF 100RDHa 60 Location at which the duct direction can be changed Ceiling suspension fixture 4x13x30 length hole for GUF 50 types 4x15x30 length hole for GUF 100 types Damper e Maintenance cover 79 Lossnay core l EA RA T k Exhaust air Return air Air supply fan m o a E SA 9 Supply air EE NP 8 S Outdoor air kai 2 p Em Solenoid valve unit with Lossnay core im pressure regulator Air filter Ins Latin con arias Inspection Inspection Solenoid
39. r support Damper R50 054 225 R50 232 150 R50 069 156 R50 472 716 R50 472 715 Special bush Thermistor Cord clip Cord clip Thermistor M31 234 089 Y55 011 215 R50 399 223 R50 399 224 Y55 011 216 50 to 105 C 50 to 105 C PT screw 4x8 BS Lock washer 4 Transformer PT screw 4x8 PPT screw 4x20 HOO 011 008 H00 013 076 Y55 001 217 000 349 HOO 141 005 Terminal block Cord band TB fix plate Control cover Wiring diagram Y55 011 217 K83 170 228 Y55 011 693 R50 429 693 Y55 011 368 3P With lead wires White Side plate Bush PPT screw 3x8 Circuit board PCB fix plate Y55 011 695 K82 163 225 003 005 Y55 007 171 R50 327 730 FU MO5 D1 Capacitor PCB fix plate Y55 011 287 Y55 011 694 N a e 2 l eS NO G o AQ 4 0uF 440VAC GUF 50RDH4 47 47 46 shows accessory parts GUF 50RDH4 GUF 50RDH4 Name of part Spl screw 4x11 Maint cover Spl screw 4x12 Core guide Filter stopper M34 074 017 R50 542 486 HOO 000 488 R50 216 381 R50 521 710 Q ty pcs unit O a Nan Critical for safety Remarks O O Q N PTT screw 4x8 Fix piece Fix plate Filter Core guide H00 000 487 R50 429 700 R50 429 699 R50 521 717 R50 478 382 gt o Lossnay core Flange PT screw 6x12 Hanger Cover R50 542 711 R50 028 610 000 244 R5
40. rews indicated by O to Reinforcement remove the reinforcement Unfasten the cord clips two clips indicated by A to release the motor lead wire When the motor lead wire is sealed as shown in the picture below 9 Unscrew the screws two screws indicated by O to remove the reinforcement and sealing materials Unfasten the cord clips two clips indicated by A to release the motor lead wire Reinforcement Assembly precaution After replacing the motor set the center of packing material of the motor lead wire under the reinforcement It is not required to reinstall the metal part shown in the picture below Metal part Sealing material Packing material Before replacing the motor After replacing the motor 20 3 Damper Motor Section CD Unscrew the screws indicated by O from the mo tor cover GUF 50 types two PTT screws 4 x 6 GUF 100 types two PTT screws 4 x 8 2 Take the damper motor out of the cover 4 Circuit Board Section CD Unscrew the screws four PT screws 4 x 8 indicated by O from the control cover 2 Unscrew the screws from the capacitors One PTT Screw 4 x 8 for each capacitor indicated by O c Motor cover Control cover Capacitor 8 Remove all lead wires connected to the circuit board 4 Take the circuit board out Circuit board Note The compatible circuit board which is equipped HIGH
41. ster and the outdoor units and then turn them ON again When the system returns to normal It means the error was detected because the transmission cables were wired with the power ON If the system does not return to normal Check the causes 3 and written in the left and repair the troubled sections If none of the above causes applies inspect the transmission waveform and noise in the transmission cable line If the error 6602 occurs noise will probably be a cause Error code Error content MA remote control ler communication error Contact failure of the MA remote con troller transmission cable Check the transmission cable for discon nection or looseness The voltage signal in the MA remote controller transmission cable drops Check the transmission cable if the length is beyond the range of the wiring regulation A signal was changed due to noise in the MA remote controller transmission cable Inspect noise in the transmission signal Failure in the transmit receive circuit for the MA remote control of the MA remote controller or Fresh Master If no problem is found after checking the above items it is a malfunction of the MA remote controller or Fresh Master Capacity code set ting error Capacity code setting of Fresh Master is wrong Check the capacity code setting switches SW2 1 to SW2 6 Remote controller setting error The MA Remote controller was con
42. them ON again Malfunction of a controller for the device in which the error occurs If the same error occurs again it is a mal function of the circuit board in the device in which the error occurs Communication er ror No ACK error Only when the error occurs in Fresh Master Single coolant system DThe address has been changed in midstream Improper wiring or disconnection of the transmission cable 3 Malfunction of the controller 4 Malfunction of the remote controller When the switch SW3 1 is ON Group operation system with multiple coolant lines DThe above causes 1 to 4 When Fresh Master is interlocked with the indoor units in the different coolant line Short circuit or disconnection of the transmission cable to the terminal block for central control TB7 in the outdoor unit 3 The outdoor unit in one of the cool ant lines is shut down The setting of the outdoor unit is incorrect If the error occurs after the unit oper ates normally the following can be caused Total capacity error 7100 Capacity code setting error 7101 The number of connected devices er ror 7102 Address setting error 7105 Simultaneously turn OFF the power of the outdoor units and Fresh Master and then turn them ON again In the case of the accidental malfunction the unit returns to normal If the unit does not return to normal check the causes to 4 Simultaneous
43. uct Wire the transmission cables away from the signal cables Are multiple transmission cables wired with multi core cables Use suitable cables to wire the transmission cables so that they are separated from one another Are the transmission cables securely connected to the terminals Connect them securely Are the address switches on the circuit board SW11 and SW12 set to the correct number Make the setting so that the ad dress does not duplicate that of other devices within M NET control Are the transmission cables connected to the specified terminal blocks MA remote controller TM2 M NET controller TM2 A Connect them to the specified terminal blocks Signal cables to external devices Table 1 3 Check the following checkpoints when outputting the operation monitor and malfunction monitor Checkpoint Do the signal cables meet regulations Type diameter Action Use specified cables Is the signal cable wired at least 5 cm away from the power supply cable Wire the signal cable at least 5 cm away from the power supply cable duct Are multiple transmission or signal cables wired to the same power cable Wire the transmission cables away from the signal cables Are multiple signal cables wired with multi core cables Use suitable cables to wire the signal cables so that they are sepa rated from one another Are the signal cables securely connected
44. utes after power off and then start working Before replacing parts follow the instructions described in the troubleshooting When servicing always keep proper footing When servicing make sure that the power supply isolator is off so as no electrical shock or injury to occur Pay sufficient attention when working on the product Always connect the power wires properly After completing repairs verify that the product operates properly Always wear gloves when servicing The following pictures show GUF 100RDH4 1 Turning power off CD Shut down the unit 2 Turn off the power supply isolator on the distribution board 2 Fan Section Maint cover D Unscrew the cover fixing screw one special spl Screw 4 x 11 indicated by O 2 Pull back the hinge Open the maintenance maint cover and lift it off the fix piece 8 Remove the Lossnay cores from the unit Lossnay core Filter 4 Unscrew the screws from the core guides two PTT screws 4 x 12 indicated by O and remove the core guides 8 Remove the separators from the fan parts 6 Disconnect the connectors for the motor lead wire Unscrew the screws indicated by O from the mo tor fix plate GUF 50 types four PTT screws 5 x 10 GUF 100 types six PTT screws 5 x 10 Remove the fan assembly 19 Core guide Separator Motor fix plate Fan assembly Motor 9 Unscrew the screws two sc
45. ver right Cover right 7 Tighten the screws five PTT screws 5 x 10 indicated by O to attach the cover center Tighten tentatively this screw first Cover center Tighten the screws four PTT screws 5 x 10 indi Cover left cated by O to attach the cover left 9 Attach the H elem cover inside H elem cover inside Tighten the screws Seven PTT screws 5 x 10 indi H elem cover cated by O to attach the H elem cover When reassembling e Reassemble the unit in the reverse order of disas sembly e After reassembly always make a test run to be sure that the unit operates properly 28 9 Parts catalog Co Please note the following when using the parts catalog When ordering parts always indicate the part number part name and the number of parts required Parts are not always available and it may take time for you to receive them There may be specification improvements Parts marked A are critical for safety To maintain safety and performance always replace these parts with the parts prescribed Description of screw abbreviations OOO Screw x Screw diameter Length Abbreviation Description PC screw Cross recess flat head machine screw PRC screw Cross recess oval head machine screw PP screw Cross recess pan head machine screw SW PP screw Cross recess pan head scr
46. y pcs unit Critical for safety Remarks Heat exchanger Thermistor Thermistor Expansion valve Strainer R50 473 699 R40 632 936 R40 647 340 R50 474 737 R50 395 319 For the gas pipe For the liquid pipe Pipe Spl screw 4x12 Water sensor Special washer PTT screw 4x8 R50 429 303 M35 282 045 Y55 011 214 K81 602 035 260 045 a fh a Ski om om om om e With lead wires Fix plate Lead wire clip Cover B Cord bush Cover A Y55 012 692 M30 409 356 Y55 011 696 M45 649 226 Y55 011 692 Solenoid valve Cord band Drain tube Cover SOLV Hose band Y55 011 213 D40 007 344 R50 530 388 Y55 011 697 R50 117 223 200V With a drain valve Tube Hose band Tube Tube H elem cover R50 429 390 R50 261 223 R50 428 390 R50 430 389 R50 430 486 Humidifier elem Rod R50 261 714 R50 270 705 Abba Aa A oD ala aaa aa naaa With packing GUF 100RDH4 GUF 100RDH4 Name of part Spl nut 12 Washer 12 Centrifugal fan Fan base Inlet ring Parts No R50 218 067 K83 466 113 R50 479 480 R50 480 707 R50 264 711 Q ty pcs unit Critical for safety Remarks Left handed 245 PT screw 6x20 Spl washer 6 Spacer Bush Motor fix plate HOO 157 008 M34 043 080 R50 000 095 R50 217 225 R50 218 712 Key Motor Nut 6 Motor Y50 033 104 Y55 012 454 061 050 Y55 012 453 N N N
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