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Serial signal transmission error

[Wiring error including power cable, defective indoor/
outdoor unit PCB, error on power supply system]

Does error persist after power
reset?

Is there any wrong connection on
indoor/outdoor unit wiring?

Is DC 0~Approx. 12V detected
between

terminals on

indoor unit terminal block?

YES

Trouble by transient cause, not unit trouble.

Correct improper wire connection on indoor/
outdoor unit.

Defective indoor unit PCB

YES

Is DC 0~Approx. 12V detected
between

terminals on

outdoor unit terminal block?

Is AC 220/230/240V applied
between

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.

Defective outdoor unit PCB

Check crossover wires.

Indoor fan motor error

[Defective fan motor,
defective PCB]

YES

Is connector connection good?

Is voltage applied to fan motor?

Defective fan motor

Correct connector
connection.

Defective indoor unit
PCB

Rotor lock

[Compressor defect, outdoor
unit circuit defect]

YES

Check compressor wiring visually.

Check insulation resistance. (1 M

Ω

or over)

Check coil wire resistance. (Few

Ω

)

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

Inspect compressor.

Defective inverter

If check results are normal,
compressor is locked.

Содержание SRK25ZD-S

Страница 1: ...VERTER WALL MOUNTED TYPE ROOM AIR CONDITIONER Split system air to air heat pump type Alternative refrigerant R410A use models SRK25ZD S 35ZD S 50ZD S TECHNICAL MANUAL Collection data Manual No 04 SRK...

Страница 2: ...7 Outline of cooling operation 16 4 8 Outline of dehumidifying operation 17 4 9 Outline of automatic operation 19 4 10 Economical operation 19 4 11 Protective control function 19 5 APPLICATION DATA 25...

Страница 3: ...he inverter frequency 3 Remote control flap The flap can be automatically controlled by operating wireless remote control Air scroll AUTO Flap operation is automatically control Swing This will swing...

Страница 4: ...on switch Wireless Remote controller Room temperature control Microcomputer thermostat Pilot lamp RUN Green TIMER Yellow HI POWER Green ECONO Orange Safety equipment O D mm in Liquid line 6 35 1 4 Gas...

Страница 5: ...ion control Operation switch Wireless Remote controller Room temperature control Microcomputer thermostat Pilot lamp RUN Green TIMER Yellow HI POWER Green ECONO Orange Safety equipment O D mm in Liqui...

Страница 6: ...heater Operation control Operation switch Wireless Remote controller Room temperature control Microcomputer thermostat Pilot lamp RUN Green TIMER Yellow HI POWER Green ECONO Orange Safety equipment O...

Страница 7: ...or air temperature Upper lower limits Vertical height difference between outdoor unit and indoor unit Max 10m Outdoor unit is higher Max 10m Outdoor unit is lower Max 25m Max 15m Outdoor unit is highe...

Страница 8: ...ve Liquid 6 35 1 4 Service valve Gas 12 7 1 2 Ground terminal 124 34 6 20 2 0 42 7 100 3 15 640 14 Model SRC50ZD S Unit mm 290 540 14 4 47 4 42 6 264 5 71 404 5 510 720 17 8 Drain holes 50 12 39 7 99...

Страница 9: ...Capillary tube Strainer Accumulator Service valve Gas Electronic expansion valve Piping Gas 9 52 Model SRK50ZD S Outdoor unit Indoor unit Room temp thermistor Heat exchanger Flare connecting Heat exch...

Страница 10: ...tdoor heat exchanger How to obtain the cooling and heating capacity Example The net cooling capacity of the model SRK35ZD S with the piping length of 15m indoor wet bulb temperature at 19 0 C and outd...

Страница 11: ...P Power transistor 20S 52C EEV FMo DS CM 1 2 3 FMI SM Display Wireless R Amp Black Brown Red Blue White Yellow Green BK BR RD BL WH Y GN Color symbol Meaning of marks Symbol Parts name CM Compressor m...

Страница 12: ...h1 Th2 Th3 Th4 Th5 Th6 20S Power transistor N P L N1 N2 P2 IC12 DS L 1 3 4 5 6 CNU Black Brown Red Blue White Yellow Green BK BR RD BL Orange OR Green GR WH Y GN Color symbol Meaning of marks Symbol P...

Страница 13: ...g the clock OFF TIMER button This button selects OFF TIMER operation TEMPERATURE button This button sets the room temperature This button changes the present time and TIMER time CANCEL button This but...

Страница 14: ...R light yellow Illuminates during TIMER operation HI POWER light green Illuminates during HI POWER operation RUN HOT KEEP light green Illuminates during operation Flashes at air flow stop due to the H...

Страница 15: ...pid movement Thin line Slow movement Stops for approximately 5 seconds in the horizontal position s During heating t operation Stops for approximately 5 seconds in this position Thick line Rapid movem...

Страница 16: ...on a Speed of inverter changes within the range of selected air flow b When the defrosting protection device etc is actuated operation is performed in the corresponding mode c Outdoor unit blower oper...

Страница 17: ...C 50 type 4 0 C 5 During continuous compressor operation In addition when the speed command from the indoor controller of the indoor unit during heating operation has counted 0 rps 10 times or more an...

Страница 18: ...er speed 102 rps 120 rps Indoor fan Hot keep M mode max 8th speed Hot keep M mode max 7th speed Outdoor fan 4th speed 2nd speed Notes 1 Room temperature is not adjusted during the HI POWER operation 2...

Страница 19: ...speed 1min stop Notes 1 Protective functions will actuate with priority even during the HI POWER operation 2 Room temperature is not adjusted during the HI POWER operation 4 8 Outline of dehumidifying...

Страница 20: ...Outdoor fan Determination of cooling oriented dehumidifying operation range Temperature check 5 min 5 min 5 min 5 min Operation pattern O L M Low 1 0 High Room temperature Setting temperature deg Oper...

Страница 21: ...5 26 27 28 29 30 31 32 4 10 Economical operation ECONO button on remote controller ON 1 The set temperature is raised by 1 5 C 0 5 C every one hour at cooling operation and lowered by 2 5 C Steps of 1...

Страница 22: ...g 30 rps is directed during 30 rps forced operation the unit follows it Note 2 Values in are for Type 50 5 Compressor protection start a When the indoor unit calculated speed is 64 rps or over at oper...

Страница 23: ...0 rps if the output speed obtained with the fuzzy calculation exceeds the upper limit the upper limit value is maintained 3 The outdoor fan is set on 2nd speed 25 35 types only 4 The lower limit of co...

Страница 24: ...start any more Timer lamp on the indoor unit flashing at the same time 15 High pressure control a Purpose Prevents anomalous high pressure operation during heating b Detector Indoor unit heat exchange...

Страница 25: ...on Content When the command speed upper limit is set at 70 rps c Reset Conditions When the temperature sensed by the outdoor heat exchanger thermistor Th4 becomes 7 C or higher 17 Stop mode a Operatin...

Страница 26: ...Heating heating Cooling cooling oriented dehumidifying oriented dehumidifying oriented dehumidifying oriented dehumidifying Stop Full stop Stop Full stop Stop Restart Stop Restart 0 rps command 0 rps...

Страница 27: ...u 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 cab...

Страница 28: ...s operating sound will not be a nuisance to the neighborhood f A place where servicing space can be secured g A place where vibration will not be enlarged h In heating operation snow deposit on the he...

Страница 29: ...f 5 degree from indoor side to outdoor side Indoor side Outdoor side Cut off the sleeve collar in case of drawing piping out to rear Cut off the sleeve collar that can be seen from beneath the unit Wa...

Страница 30: ...inserted in sufficiently water leakage could re sult Since this air conditioner has been designed to collect dew drops on the rear surface to the drain pan do not attach the power cord above the gutte...

Страница 31: ...rong winds secure the unit firmly with foundation bolts wire etc 2 Connection of indoor and outdoor connecting wiring a Connect the wiring according to the number of the indoor terminal block Mis wiri...

Страница 32: ...side Connect firmly gas and liquid side pipings by Torque wrench Outdoor unit side Connect firmly gas and liquid side pipings by Torque wrench Specified torquing value Liquid side 6 35 14 0 18 0N m 1...

Страница 33: ...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 Insert in electric plug into the electric outlet...

Страница 34: ...e more or less depending on the installation 3 The coverage may be less or even nil If the sensing element is exposed to strong light such as direct sunlight illumination etc or dust is deposited on i...

Страница 35: ...nt service valve open 3 Troubleshooting procedure If the air conditioner does not run at all If the air conditioner does not run at all diagnose the trouble using the following troubleshooting procedu...

Страница 36: ...le and perform an operation check The air conditioning system is operating normally Replace the faulty component then perform an operation check Identify the faulty component by using the check proced...

Страница 37: ...error Over heat of compressor When a liquid pipe sensor wire disconnection is detected while operation is stopped If a temperature of 50 C or lower is detected for 15 seconds it is judged that the wi...

Страница 38: ...witching are recorded when trouble occurs so more detailed information can be checked These are the data which display the reason by a stop occurred when the air conditioning system performed protecti...

Страница 39: ...mote controller information at the time the error code was displayed in the past Displays the outdoor temperature sensor temperature at the time the error code was displayed in the past Displays the o...

Страница 40: ...it is judged that the power transistor was damaged at the time the compressor started When it is judged that the power transistor was damaged at the time the compressor started When PWM calculation re...

Страница 41: ...Protective control operation Indoor unit fan motor is abnormal Discharge pipe sensor is abnormal anomalous stop Indoor heat exchanger sensor is abnormal anomalous stop Heat exchanger liquid pipe senso...

Страница 42: ...of times in If no is displayed the error display shows that the trouble has occurred once Notes 3 Automatic Recovery Does not occur Automatic recovery occurs iv Remote controller information tables 1...

Страница 43: ...6 76 86 96 57 47 37 27 17 7 7 17 27 37 47 57 67 77 87 97 58 48 38 28 18 8 8 18 28 38 48 58 68 78 88 98 59 49 39 29 19 9 9 19 29 39 49 59 69 79 89 99 No does not sound If no data are recorded error cod...

Страница 44: ...14 134 56 36 16 16 36 56 76 96 116 136 58 38 18 18 38 58 78 98 118 138 No does not sound If no data are recorded error code is normal the display for each sensor becomes as shown below Sensor name Dis...

Страница 45: ...eat exchanger sensor temperature on fourth previous occasion Remote controller information on fourth previous occasion Outdoor temperature sensor temperature on fourth previous occasion Outdoorheatexc...

Страница 46: ...Defective inverter Secure space for suction and blow out If check results are normal compressor is locked Is connector connection good YES YES NO NO Replace PCB Correct connection Replace thermistor I...

Страница 47: ...Defective inverter Is compressor wiring connected securely Connect securely Inspect compressor YES YES NO NO Is Discharge pipe thermistor resistance value good Page 44 Is sufficient quantity of refri...

Страница 48: ...plied between 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 ca...

Страница 49: ...ting is not operated All modes Operation mode System can be operated normally Defrosting is performed for 10 minutes at approx 1 hour System can be operated normally Defrosting is performed for 10 min...

Страница 50: ...V Is DC 0 12V detected between terminals 2 3 on terminal block Replace fuse Replace PCB Replace PCB 9 How to make sure of remote controller Note 1 Check method of remote controller a Press the reset s...

Страница 51: ...ly applied to the electronic expansion valve when the valve opening is being changed Red to White Red to Orange Brown to Yellow Brown to Blue Normal if there is approximately DC 5 V 10 seconds after t...

Страница 52: ...on Inspection of input to PCB Power transistor inspection procedure Check the voltage between terminals 1 2 on the terminal block It is normal if AC 220 230 240V is detected Inspection of serial signa...

Страница 53: ...en immediately retighten it after observing that gas is blow out from the loosened portion e Open the valve 1 and 3 after discharging air from the charge hose A then the liquid refrigerant begins flow...

Страница 54: ...Pseudo azeotropic characteristics R410A is a pseudo azeotropic mixed refrigerant composed of two constituents R32 and R125 Quasi azeotropic condition refers to a state in which the dew point curve an...

Страница 55: ...isonous gas may occur 5 When an air conditioning system charged with a large volume of refrigerant e g multi type air conditioner is installed in a small room it is necessary to exercise care so that...

Страница 56: ...ce outer diameter Minimum joint thickness diameter of copper pipe jointed mm mm 1 4 6 35 0 50 3 8 9 52 0 60 1 2 12 70 0 70 5 8 15 88 0 80 7 2 2 Processing of piping materials When performing the refri...

Страница 57: ...1 4 6 35 0 8 0 0 5 1 0 1 5 1 5 2 0 3 8 9 52 0 8 0 0 5 1 0 1 5 1 5 2 0 1 2 12 70 0 8 0 0 5 1 0 1 5 2 0 2 5 5 8 15 88 1 0 0 0 5 1 0 1 5 2 0 2 5 Table 6 Dimensions related to flare processing for R22 No...

Страница 58: ...and which contains less contaminants It is necessary to carefully treat store copper pipes so that they are not collapsed deformed or damaged Due care must also be exercised so that foreign matters su...

Страница 59: ...ing the connected parts As brazing is molten between the joined surfaces to yield high adhesive strength it is necessary to secure a wide enough space to be joined and also an adequate clearance betwe...

Страница 60: ...ssium fluoride potas sium chloride and sodium fluoride to the borax boric acid compound Cautions 1 Remove the flux after brazing 2 When chlorine contained in the flux stays within the pipe the lubrica...

Страница 61: ...cloth and 3 by means of heat absorbent 4 Movement during brazing Eliminate all vibration during brazing to protect brazed joints from cracking and breakage 5 Oxidation preventive In order to improve...

Страница 62: ...o types of electronic balance for refrigerant charging are available one for 10kg cylinder and the other for 20kg cylinder Electronic balance for 10kg cylinder precision 2g Electronic balance for 20kg...

Страница 63: ...cking for refrigerant cylinder According to the charge hose s cap size a charge port with 1 2 UNF 20 threads per inch and corresponding packing are required j Gas leakage detector A high sensitivity g...

Страница 64: ...e to make setting so that liquid can be charged When using a cylinder equipped with a siphon liquid can be charged without turning it upside down b Connect the gauge manifold s charge hose to the elec...

Страница 65: ...e indoor outdoor units Caution When storing the indoor unit piping in its original position be careful not to break the piping 2 Installing the unit a Proceed with the installation following the steps...

Страница 66: ...reventing function float switch moisture indicator drier and other accessory functions should be adjusted or replaced where necessary 4 Electrical circuit b Checking the accessories to the refrigerant...

Страница 67: ...cessories tools are required Shown below are standard accessories 1 Recovering cylinder Use a recovering cylinder designated by the equipment manufacturer A detachable cylinder must be such that it co...

Страница 68: ...iercing valve a A tool used to make a hole for recovery in the copper pipe when recovering R410A from equipment which has no port for charging or recovering gas Various types are available on the mark...

Страница 69: ...2 INVERTER WALL MOUNTED TYPE ROOM AIR CONDITIONER No 044 1 1A RO Air Conditioning Refrigeration Systems Headquarters 16 5 2 chome Kounan Minato ku Tokyo 108 8215 Japan Fax 03 6716 5926...

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