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Mitsubishi Daiya SRC25GZ-L1, User Manual, Page: 41 / 50

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Mitsubishi Daiya SRC25GZ-L1 User Manual Download Page 41

41

SRK-GZ

Is discharge pipe (Comp. dome)
thermistor resistance value good?

Is sufficient quantity of refrigerant
circulated?

Defective inverter

YES

YES

NO

NO

YES

NO

Gas shortage

Connector connection check, resistance
value check, replacement of discharge pipe
(Comp. dome)  thermistor

Does trouble persist after
charging gas?

Clogged capillary tube,
etc.

Outdoor unit error

[Broken power transistor
broken  compressor wire]

Current safe stop

[Overload operation, compressor
lock, overcharge]

Compressor overheat

[Gas shortage, defective discharge
pipe (Comp. dome) thermistor]

Secure space for suction and blow
out.

Discharge refrigerant.

Is refrigerant charge quantity adequate?

Is outdoor ventilation condition good?

Inspect compressor.

Defective inverter

YES

YES

NO

NO

YES

Is output voltage applied to all 3
phases of power transistor?

Defective inverter

Is compressor wiring connected
securely?

Connect securely.

Inspect compressor.

YES

YES

NO

NO

Summary of Contents for SRC25GZ-L1

Page 1: ...1 SRK GZ 1 WALL MOUNTED TYPE ROOM AIR CONDITIONER Split system Air to air heat pump type SRK25GZ L1 SRK35GZ L1 SRK502Z L 1 SRK GZ...

Page 2: ...3 1 Electrical wiring 12 1 4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 16 1 5 APPLICATION DATA 30 1 5 1 Selection of location for installation 31 1 5 2 Installation of indoor unit 32 1 5 3 Instal...

Page 3: ...control after the unit has stabilized 2 Fuzzy control Fuzzy control calculates the amount of variation in the difference between the suction air temperature and the setting tem perature in compliance...

Page 4: ...roller Room temperature control MC Thermostat Pilot lamp RUN Green TIMER Yellow Safety equipment O D mm in Liquid line 6 35 1 4 Gas line 9 52 3 8 Connecting method Flare connecting Attached length of...

Page 5: ...equipment O D mm in Liquid line 6 35 1 4 Gas line 12 7 1 2 Connecting method Flare connecting Attached length of piping Liquid line 0 4 m Gas line 0 35 m Insulation Necessary Both sides Drain hose Con...

Page 6: ...Green Safety equipment O D mm in Liquid line 6 35 1 4 Gas line 12 7 1 2 Connecting method Flare connecting Attached length of piping Liquid line 0 4 m Gas line 0 35 m Insulation Necessary Both sides...

Page 7: ...rature conditions however excludes the initial pull down stage Note The chart is the result from the continuous operation un der constant air temperature conditions however ex cludes the initial pull...

Page 8: ...5 19 9 236 5 4 5 36 117 40 37 36 56 9 49 A 790 15 67 51 60 62 18 16 780 VIEW A 15 760 170 450 170 Room temp thermistor Terminal block Piping for Gas 12 7 390 Piping for Liquid 6 35 440 Drain hose 600...

Page 9: ...82 5 61 5 2 12 Terminal block 127 7 33 3 40 40 645 Drain holes Service valve Gas Flare connecting 9 52 3 8 Service valve Liquid Flare connecting 6 35 1 4 50 12 42 13 5 274 5 300 12 23 44 245 540 100...

Page 10: ...23 14 93 44 142 5 510 33 142 5 40 32 115 45 45 Service Valve Liquid Flare connecting 6 35 1 4 Service Valve Gas Flare connecting 12 7 1 2 Terminal block Drain holes 542 539 413 65 15 300 272 14 58 44...

Page 11: ...r temp thermistor Compressor Accumulator Discharge Heat exchanger thermistor Cooling cycle Heating cycle Indoor unit Outdoor unit Outdoor unit Indoor unit Room temp thermistor Heat exchanger Flare con...

Page 12: ...Room temp thermistor 20S 4 way valve coil FMI Fan motor Indoor Th2 Heat exchanger thermistor Indoor unit 52C Magnetic contactor FMO Fan motor Outdoor Th3 Humidity thermistor DS Diode stack NF Noise f...

Page 13: ...line BK 1 2 3 4 WH 3 2 1 3 2 1 Back up switch Power transistor Y WH RD Y GN WH BK RD WH GY RD WH BK Y GN Y GN LB BR Black Blue Brown Light blue Yellow Red Gray White Violet Yellow Green F2 15A NK NK...

Page 14: ...er source Signal line BK 1 2 3 4 WH 3 2 1 3 2 1 Back up switch Power transistor Display CND Wireless R Amp Y WH RD Y GN WH BK RD WH GY RD WH BK Y GN Y GN LB BR Black Blue Brown Light blue Yellow Red G...

Page 15: ...board Printed circuit board Printed circuit board Power transistor Fuse 250V 25A WH Y BL Y GN LB BR RD WH BK RD CNB CNB GY BL CNA CNE DS IC2 RL CNA WH RD WH BK U V W P N OR RE WH BK 52C 4 52C 3 52C F...

Page 16: ...but practically only the pertinent parts are indicated HI POWER operation indicator Indicators during HI POWER operation ECONOMY operation indicator Indicators during ECONOMY operation Operation switc...

Page 17: ...button ON OFF button ON OFF Model SRK25GZ L1 Model SRK35GZ L1 TIMER RUN SRK35GZ RUN HOT KEEP lamp green Illuminates during operation Flashing at stop blowing due to the hot keep TIMER lamp yellow Ill...

Page 18: ...downward directions continuously Horizontal blowing ii When not operating The flap returns to the position of air flow directly below when operation has stopped b Memory flap Excepted SRK 25 model Whi...

Page 19: ...sensor Th1 2 This function does not actuate when the operation select switch is set at the dehumidifying as well as the dehumidifying in the auto mode However the operation of item 1 above is perform...

Page 20: ...al mode Normal heating operation operation after HI POWER completion Values of A B A B At 0 Hz command 22 25 Other than 0 Hz 17 19 command Indoor heat exchanger temp C 1st speed 2nd speed 3rd speed 4t...

Page 21: ...ation after end of defrosting 100 sec Defrosting operation Defrost ON operation 80 sec Fuzzy calculation value Outdoor fan Inverter command frequency Operation lamp Depending on frequency 4 way valve...

Page 22: ...requency turned to 0 Hz during heating operation 2 When the temperature detected with the external temperature sensor is below 2 C 2 Detail Low voltage is applied to the compressor from the inverter s...

Page 23: ...34 44Hz 34 44Hz 18 44rps Air flow 3 4th speed 3rd speed 3 4th speed ii When any protective function actuates the operation is performed in the mode corresponding to the function iii Outdoor blower is...

Page 24: ...RK25 35GZ L1 1 0 Room temperature Setting temperature deg 2 High Low 55 70 100 Operation range Relative humidity I C B A F E D 55 70 Relative humidity Humidity sensor setting range High humidity range...

Page 25: ...fying After interrupting the compressor operation for 3 minutes by the 3 minute timer following the determination of heating oriented dehumidifying the unit enters in the heating operation If the room...

Page 26: ...1 step 2 Taking the upper limit of control frequency range at 25 35 60 Hz 50 70 rps if the output frequency obtained with the fuzzy calculation exceeds the upper limit the upper limit value is maintai...

Page 27: ...ing at the same time iii Reset conditions When the external temperature thermistor temperature drops below 40 C h Freezing cycle system protective control i Operating conditions When both of following...

Page 28: ...urns to 0 Hz When 0 Hz is commanded from the indoor unit controller when an outdoor protective function is actuated ii Detail of operation S SRK25GZ L1 35GZ L1 ON OFF ON OFF 10 sec 10 sec Notes 1 When...

Page 29: ...tion Heating heating Cooling cooling Heating heating Cooling cooling oriented dehumidifying oriented dehumidifying oriented dehumidifying oriented dehumidifying Stop Full stop Stop Full stop Stop Rest...

Page 30: ...lu sive use circuits are used Insufficient power source circuit capacity and defective installment execution can be the cause of electric shocks and fires Accurately connect wiring using the proper ca...

Page 31: ...ce to the neighborhood f A place where servicing space can be secured 4 cm 5 cm 10 cm 1 5 cm Left side Right side r h Air inlet Service space Air inlet Air Outlet Note 1 If the wall is higher than 1 2...

Page 32: ...ews in a temporary tightened state Adjust so that board will be level by turning the board with the stan dard hole as the center Fixing on concrete wall Use of nut anchor Use of bolt anchor Note 1 Dri...

Page 33: ...Install lid b Protective taping Protect the cable with tape at the section where the cable passes through the hole opened on the wall c Forming of pipe Holding down the pipe at the root change the pi...

Page 34: ...Drain elbow should not be used where days when temperature drops below 0 C continue for several days Draining may be disturbed by frozen water d When installing the unit at a higher place or where it...

Page 35: ...After completing vacuum operation fully open service valve Both gas and liquid sides with hexagon headed wrench e Check for possible leakage of gas in the connection parts of both indoor and outdoor...

Page 36: ...ver when the power source is cut off or when the unit s operation switch is turned off or was turned to fan operation position the unit will not go into operation in order to protect the compressor 3...

Page 37: ...may be more or less depending on the installation 3 The coverage may be less or even nil If the sens ing element is exposed to strong light such as direct sunlight illumination etc or dust is deposite...

Page 38: ...ur again Temporarily turn off the power source and turn it on again in about 1 min and turn the unit on again YES No YES YES Does the trouble occur again Disconnect connectors and connect them again O...

Page 39: ...rance thermistor temperature of 50 C or un der continued for more than 3 seconds while operation is stopped This is not displayed during operation When outdoor revolution speed of 0 rps continued for...

Page 40: ...eat ex changer temperature outdoor unit heat exchanger temperature external tem perature Discharge pipe Comp dome thermistor temperature char acteristics Temperature C Shortcircuit Broken wire Resista...

Page 41: ...or Broken power transistor broken compressor wire Current safe stop Overload operation compressor lock overcharge Compressor overheat Gas shortage defective discharge pipe Comp dome thermistor Secure...

Page 42: ...n 1 2 on the outdoor side terminal block Defective indoor unit PCB Check crossover wires Is there any problem on the power supply line fuse reactor capacitor etc Replace fuse reactor or capacitor Defe...

Page 43: ...l YES Again pushing operating switch Operating the unit NO Does backup switch operates Operating the unit NO NO YES YES Remote controller defects Abnormality is not found a Press the reset switch of t...

Page 44: ...fuse 3 15A blown Indoor electrical equipment are normal Is voltage applied between CNC 1 2 at transformer s secondary side Approx 12V Is voltage applied between terminals 1 2 on terminal block 220 24...

Page 45: ...transistor Including power transistor mark Tester probe Black BK BR Y RD V WH Y GN Operation Cooling HI POWER Cooling Rating Heating HI POWER Heating Rating Note 1 The output voltage are reference val...

Page 46: ...transistor Including power transistor mark Tester probe Black BK BR Y RD V WH Y GN Operation Cooling HI POWER Cooling Rating Heating HI POWER Heating Rating Note 1 The output voltage are reference val...

Page 47: ...parts in the control box for 5 minutes after the unit is stopped 1 2 3 Y GN Y GN S IN RD WH BK R IN G CNB CNB RL GY DS IC2 P RD U WH BK Tho A Tho R CND CNC CNA CNE CNA Tho D V W N BL AC S AC R S OUT 5...

Page 48: ...ose A Firstly loose the connecting portion of the charge hose A at the gauge manihold side and open the valve 3 for a few seconds and then immediately retighten it after observing that gas is blow out...

Page 49: ...MA165 to Remote part on the PCB in the direction as shown in the diagram below This diagram shows SRK25GZ L1 and although the other units have different layout on the PCB their concepts are some Powe...

Page 50: ...50 SRK GZ MEMO...

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