Table of Contents
Advertisement
SERVICE MANUAL
TECHNICAL INFORMATION
FOR SERVICE PERSONNEL ONLY
SPECIFICATIONS
TYPE
MODEL
POWER SOURCE
TOTAL INPUT
TOTAL AMPERES
COOLING
CAPACITY
TOTAL INPUT
TOTAL AMPERES
HEATING
CAPACITY
DIMENSIONS
(mm)
NET WEIGHT
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
ROOM AIR CONDITIONER
APRIL 2008
RAS-80YH5A
RAC-80YH5
(W)
(A)
(kW)
(B.T.U./h)
(W)
(A)
(kW)
(B.T.U./h)
W
H
D
(kg)
INDOOR UNIT + OUTDOOR UNIT
Refrigeration & Air-Conditioning Division
PM
RAS-80YH5A/RAC-80YH5
REFER TO THE FOUNDATION MANUAL
SPECIFICATIONS ----------------------------------------------------- 4
HOW TO USE ---------------------------------------------------------- 6
CONSTRUCTION AND DIMENSIONAL DIAGRAM ------- 30
MAIN PARTS COMPONENT ------------------------------------- 32
WIRING DIAGRAM -------------------------------------------------- 34
CIRCUIT DIAGRAM ------------------------------------------------- 35
PRINTED WIRING BOARD LOCATION DIAGRAM ------- 41
BLOCK DIAGRAM --------------------------------------------------- 44
BASIC MODE --------------------------------------------------------- 45
REFRIGERATING CYCLE DIAGRAM ------------------------- 59
DESCRIPTION OF MAIN CIRCUIT OPERATION --------- 61
TROUBLE SHOOTING --------------------------------------------- 88
PARTS LIST AND DIAGRAM ----------------------------------- 108
(WALL TYPE)
INDOOR UNIT
RAS-80YH5A
1 Ø, 50 Hz, 220 ~ 240V
3,070 (200 ~ 3,850)
14.10 ~ 12.90
8.00 (1.50 ~ 8.50)
27,300 (5,120 ~ 29,000)
3,100 (200 ~ 3,850)
14.30 ~ 13.00
9.30 (1.50 ~ 9.70)
31,730 (5,120 ~ 33,310)
1150
333
245
15
NO. 0413E
CONTENTS
OUTDOOR UNIT
RAC-80YH5
925
875
315
57
After installation
Advertisement
Table of Contents
Related Manuals for Hitachi RAS-80YH5A
Summary of Contents for Hitachi RAS-80YH5A
-
Page 1: Table Of Contents
NO. 0413E RAS-80YH5A/RAC-80YH5 SERVICE MANUAL TECHNICAL INFORMATION REFER TO THE FOUNDATION MANUAL FOR SERVICE PERSONNEL ONLY CONTENTS SPECIFICATIONS ----------------------------------------------------- 4 HOW TO USE ---------------------------------------------------------- 6 CONSTRUCTION AND DIMENSIONAL DIAGRAM ------- 30 MAIN PARTS COMPONENT ------------------------------------- 32 WIRING DIAGRAM -------------------------------------------------- 34... - Page 2 SAFETY DURING REPAIR WORK 1. In order to disassemble and repair the unit in question, be sure to disconnect the power cord plug from the power outlet before starting the work. 2. If it is necessary to replace any parts, they should be replaced with respective genuine parts for the unit, and the replacement must be effected in correct manner according to the instructions in the Service Manual of the unit.
- Page 3 WORKING STANDARDS FOR PREVENTING BREAKAGE OF SEMICONDUCTORS 1. Scope The standards provide for items to be generally observed in carrying and handling semiconductors in relative manufacturers during maintenance and handling thereof. (They apply the same to handling of abnormal goods such as rejected goods being returned). 2.
- Page 4 (6) Use a three wire type soldering iron including a grounding wire. Metal plate (of aluminium, stainless steel, etc.) Working table Resistor of 1 M (1/2W) Staple Earth wire Bare copper wire (for body earth) Fig. 3. Grounding of the working table Soldering iron Grounding wire...
- Page 5 CAUTION In quiet or stopping operation, slight flowing noise of refrigerant in the refrigerating cycle is heard occasionally, but this noise is not abnormal for the operation. When it thunders near by, it is recommended to stop the operation and to disconnect the power cord plug from the power outlet for safety.
-
Page 6: Specifications
SPECIFICATIONS MODEL RAS-80YH5A RAC-80YH5 30 W FAN MOTOR 100 W FAN MOTOR CAPACITOR FAN MOTOR PROTECTOR COMPRESSOR – JU1015D3 COMPRESSOR MOTOR CAPACITOR OVERLOAD PROTECTOR OVERHEAT PROTECTOR FUSE (MICRO COMPUTER CIRCUIT) 3.15A POWER RELAY POWER SWITCH TEMPORARY SWITCH SERVICE SWITCH TRANSFORMER... - Page 7 Figure showing the installation of Indoor and Outdoor unit CAUTION In case the pipe length is more than 20m, add refrigerant R410A at 20 gram per every meter exceeds. However, pipe length shall not exceed 30m. above 50mm Be sure to above 100mm above completely...
-
Page 8: Names And Functions Of Each Part
1 year depending on application requirements. OUTDOOR UNIT AIR INLET (BACK AND LEFT SIDE) AIR OUTLET Blow out warm air. MODEL NAME AND DIMENSIONS MODEL WIDTH (mm) HEIGHT (mm) DEPTH (mm) RAS-80YH5A 1150 RAC-80YH5 – 7 –... -
Page 9: Indoor Unit Indicators
INDOOR UNIT INDICATORS TIMER LAMP This lamp lights when the timer is working. OPERATION LAMP This lamp lights during operation. The OPERATION LAMP flashes in the following cases during heating. (1) During preheating For about 2–3 minutes after starting up. (2) During defrosting Defrosting will be performed about once an hour when frost forms on the heat exchanger of the... - Page 10 Note Avoid to use the room air conditioner for cooling operation when the outside temperature is below 21°C (70°F). The recommended maximum and minimum operating temperatures of the hot and cold sides should be as below: Cooling Heating Minimum Maximum Minimum Maximum Dry bulb °C...
-
Page 11: Safety Precaution
SAFETY PRECAUTION Please read the “Safety Precaution” carefully before operating the unit to ensure correct usage of the unit. Pay special attention to signs of “ Warning” and “ Caution”. The “Warning” section contains matters which, if not observed strictly, may cause death or serious injury. The “Caution” section contains matters which may result in serious consequences if not observed properly. - Page 12 PRECAUTIONS DURING OPERATION The product shall be operated under the manufacturer specification and not for any other intended use. Do not attempt to operate the unit with wet hands, this could cause fatal accident. When operating the unit with burning equipments, regularly ventilate the room to avoid oxygen insufficiency.
-
Page 13: Names And Functions Of Remote Control Unit
NAMES AND FUNCTIONS OF REMOTE CONTROL UNIT REMOTE CONTROLLER This controls the operation of the indoor unit. The range of control is about 7 meters. If indoor lighting is controlled electronically, the range of control may be shorter. This unit can be fixed on a wall using the fixture provided. Before fixing it, make sure the indoor unit can be controlled from the remote controller. -
Page 14: Automatic Operation
VARIOUS FUNCTIONS I Auto Restart Control If there is a power failure, operation will be automatically restarted when the power is resumed with previous operation mode and airflow direction. (As the operation is not stopped by remote controller.) If you intend not to continue the operation when the power is resumed, switch off the power supply. When you switch on the circuit breaker, the operation will be automatically restarted with previous operation mode and airflow direction. -
Page 15: Heating Operation
HEATING OPERATION Use the device for heating when the outdoor temperature is under 21°C. When it is too warm (over 21°C), the heating function may not work in order to protect the device. In order to keep reliability of the device, please use this device above -15°C of the outdoor temperature. Press the FUNCTION selector so that the display indicates (HEAT). -
Page 16: Dehumidifying Operation
DEHUMIDIFYING OPERATION Use the device for dehumidifying when the room temperature is over 16°C. When it is under 15°C, the dehumidifying function will not work. Press the FUNCTION selector so that the display indicates (DEHUMIDIFY). The FAN SPEED is set at LOW or SILENT. Set the desired room temperature with the TEMPERATURE button (the display indicates the setting). -
Page 17: Cooling Operation
COOLING OPERATION Use the device for cooling when the outdoor temperature is 21~ 43°C. If in doors humidity is very high (80%), some dew may form on the air outlet grille of the indoor unit. Press the FUNCTION selector so that the display indicates (COOL). -
Page 18: Fan Operation
FAN OPERATION You can use the device simply as an air circulator. Use this function to dry the interior of the indoor unit at the end of summer. Press the FUNCTION selector so that the display indicates (FAN). Press the (FAN SPEED) button. -
Page 19: How To Set The Timer
HOW TO SET THE TIMER Time Set the (TIME) button. After you change the batteries; TIME OFF TIMER ON TIMER OFF-Timer RESERVE Press the (OFF-TIMER) button. The (OFF) mark blinks on the display. CANCEL Start STOP You can set the device to turn off at the present time. - Page 20 Set the current time with the Press the (TIME) button again. Press the TIMER control button. The time indication starts lighting (TIME) button. instead of flashing. The time indication will disappear automatically in 10 second. To check the current time setting, press the (TIME) button twice.
-
Page 21: How To Set The Sleep Timer
HOW TO SET THE SLEEP TIMER Set the current time at first if it is not set before (see the pages for setting the current time). Press the (SLEEP) button, and the display changes as shown below. Mode Indication 1 hour 2 hours 3 hours 7 hours... - Page 22 SHIFT VALUE ADJUSTMENT – 21 –...
-
Page 23: Circuit Breaker
HOW TO EXCHANGE THE BATTERIES IN THE REMOTE CONTROLLER Remove the cover as shown in the figure and take out the Push and pull to the old batteries. direction of arrow Install the new batteries. The direction of the batteries should match the marks in the case. -
Page 24: Suitable Room Temperature
THE IDEAL WAYS OF OPERATION Suitable Room Temperature Install curtain or blinds Warning It is possible to Freezing temperature reduce heat is bad for health and a entering the waste of electric power. room through windows. Ventilation Effective Usage Of Timer At night, please use the “OFF or ON timer Caution operation mode”, together with your wake up... - Page 25 FOR USER’S INFORMATION The Air Conditioner And The Heat Source In The Room Caution If the amount of heat in the room is above the cooling capability of the air conditioner (for example: more people entering the room, using heating equipments and etc.), the preset room temperature cannot be achieved.
-
Page 26: Attaching The Air Cleansing Filters
ATTACHING THE AIR CLEANSING FILTERS CAUTION Cleaning and maintenance must be carried out only by qualified service personal. Before cleaning, stop operation and switch off the power supply. Open the front panel. Pull up the front panel by holding it at both sides with both hands. - Page 27 MAINTENANCE CAUTION Cleaning and maintenance must be carried out only by qualified service personal. Before cleaning, stop operation and switch off the power supply. AIR FILTER Clean the air filter, as it removes dust inside the room. In case the air filter is full of dust, the air flow will decrease and the cooling capacity will be reduced.
- Page 28 Washable Front Panel Remove the front panel and wash with clean water. Wash it with a soft sponge. After using neutral detergent, wash thoroughly with clean water. When front panel is not removed, wipe it with a soft dry cloth. Wipe the remote controller thoroughly with a soft dry cloth.
- Page 29 CAUTION Cleaning and maintenance must be carried out only by qualified service personal. Before cleaning, stop operation and switch off the power supply. MAINTENANCE AT BEGINNING OF LONG OFF PERIOD Running the unit setting the operation mode to (FAN) and the fan speed to HI for about half a day on a fine day, and dry the whole of the unit.
- Page 30 AFTER SALE SERVICE AND WARRANTY WHEN ASKING FOR SERVICE, CHECK THE FOLLOWING POINTS. CONDITION CHECK THE FOLLOWING POINTS If the remote controller is Do the batteries need replacement? not transmitting a signal. Is the polarity of the inserted batteries correct? Remote controller display is dim or blank.) Is the fuse all right?
-
Page 31: Construction And Dimensional Diagram
CONSTRUCTION AND DIMENSIONAL DIAGRAM Unit : mm 17.5 Wireless remote controller Suction grill Front panel Mounting plate Discharge grill Vertical air deflecter Horizontal air deflecter About Hook for installation Drain cap connection port Viewed from back Drain hose When piping is drawn (bottom direction pipe horizontally, exchange the lead-out) - Page 32 Note: 1. 200mm or more servicing space is required above the outdoor unit. – 31 –...
-
Page 33: Main Parts Component
MAIN PARTS COMPONENT THERMOSTAT (Room Temperature Thermistor) Thermostat Specifications MODEL RAS-80YH5A THERMOSTAT MODEL OPERATION MODE COOL HEAT 15.6 (60.1) 20.0 (68.0) INDICATION 15.3 (59.5) 20.7 (69.3) TEMPERATURE 23.6 (74.5) 28.0 (82.4) INDICATION °C (°F) 23.3 (73.9) 28.7 83.7) 31.6 (88.9) 36.0 (96.8) - Page 34 COMPRESSOR MOTOR Compressor Motor Specifications MODEL RAC-80YH5 COMPRESSOR MODEL JU1015D3 PHASE SINGLE RATED VOLTAGE AC 220 ~ 240 V RATED FREQUENCY 50 Hz POLE NUMBER WHITE CONNECTION YELLOW 20°C 2M = 1.05 (68°F) RESISTANCE VALUE 75°C 2M = 1.268 (167°F) W/S (RED) V/R (YELLOW) U/C (WHITE)
- Page 35 – 34 –...
-
Page 36: Circuit Diagram
CIRCUIT DIAGRAM Remote Control – 35 –... - Page 37 CIRCUIT DIAGRAM MODEL RAS-80YH5A – 37 –...
- Page 38 CIRCUIT DIAGRAM MODEL RAC-80YH5 – 39 –...
-
Page 39: Printed Wiring Board Location Diagram
PRINTED WIRING BOARD LOCATION DIAGRAM MODEL RAS-80YH5A MAIN P.W.B. Marking on P.W.B COMPONENT SIDE SOLDERING SIDE RECEIVING P.W.B. Marking on P.W.B – 41 –... - Page 40 MODEL RAC-80YH5 MAIN P.W.B. – 42 –...
- Page 41 MAIN P.W.B. NF P.W.B. CAPA P.W.B. – 43 –...
- Page 42 – 44 –...
- Page 43 OFF TIMER DURING OPERATION) (OFF ON TIMER DURING STOP) Operating mode Operating mode is judged by room temperature and outdoor temperature 1. Judging by outdoor temperature • Operating mode is judged by outdoor temperature If outdoor temperature ≥ 25°C or 21°C ≤ outdoor temperature <...
- Page 44 Table 1 Mode data file RAS-80YH5A LABEL NAME VALUE –1 WMAX 5800 min WMAX2 5800 min –1 –1 WSTD 5000 min WJKMAX 5000 min –1 –1 WBEMAX 4000 min WSZMAX 4000 min –1 –1 CMAX 5800 min CSTD 5300 min –1...
- Page 45 Table 2 TCMAX Temperature Calculated compressor difference 1.66 2300 2.00 2300 2.33 2300 2.66 2800 3.00 2800 3.33 2800 3.66 3300 4.00 3300 4.33 3300 4.66 3800 5.00 3800 6.00 4300 6.33 4300 6.66 4800 7.00 4800 7.33 4800 7.66 5300 8.00 5300...
- Page 46 – 51 –...
- Page 47 Dehumidifying Dehumidifying Sleep Operation Notes: (1) The sleep operation starts when the sleep key is pressed. (2) When the sleep key is set, the indoor fan is set to “sleep silent” (FDOY_M or AFDOY). (3) The indoor fan speed does not change even when the fan speed mode is changed. (4) If the set time is changed during sleep operation, all data including set temperature, time, etc.
- Page 48 Table 3 TWMAX Temperature Calculated compressor difference 1.66 2300 2.00 2300 2.33 2300 2.66 2800 3.00 2800 3.33 2800 3.66 3300 4.00 3300 4.33 3300 4.66 3800 5.00 3800 6.00 4300 control by heat control by heat Control by 6.33 4300 Control by heat Control by heat...
- Page 49 – 57 –...
-
Page 50: Refrigerating Cycle Diagram
REFRIGERATING CYCLE DIAGRAM MODEL RAS-80YH5A/RAC-80YH5 COOLING, DEHUMIDIFYING, DEFROSTING SUCTION TANK INDOOR UNIT OUTDOOR UNIT SERVICE VALVE SINGLE-ENDED UNION (5/8) COMP REVERSING VALVE EXPENSION SILENCER VALVE SERVICE VALVE 6.35 (1/4) HEX THERMISTOR SINGLE-ENDED UNION HEATING SUCTION TANK INDOOR UNIT OUTDOOR UNIT... - Page 51 – 60 –...
-
Page 52: Description Of Main Circuit Operation
DESCRIPTION OF MAIN CIRCUIT OPERATION 1. Reset Circuit Micro computer Q202 AX-7X30 Q201 C202 DC12V Line DC5V Line Base POWER ON POWER OFF Micro computer Pin 7 The reset circuit is used to reset the program to its initial settings when the power is turned on or when the power is recovered after a power failure. - Page 53 2. Buzzer Circuit Micro computer (AX-7X30) BUZZER When the buzzer is to be activated, buzzer output pin of the micro computer alternates between ON and OFF repeatedly at 4kHz and Q302 is turned ON/OFF accordingly. A 4kHz voltage is applied to the buzzer and the diaphragm of the buzzer vibrates to output 4kHz sound.
- Page 54 5. Auto Sweep Motor Circuit CN12 Auto sweep motor for horizontal air deflectors Micro computer Rotor IC501 Fig. 5-1 Auto Sweep Motor Circuit (Horizontal air deflectors) Fig. 5-1 shows the Auto sweep motor drive circuit; the signals shown in Fig. 5-2 are output from pins –...
- Page 55 6. Room Temperature Thermistor Circuit Fig. 6-1 shows the room temperature The voltage at A depends on the room thermistor circuit. temperature as shown in Fig. 6-2. Room Micro temperature computer thermistor R309 Room temp. input C302 R310 Fig. 6-1 Fig.
- Page 56 8. Temporary Switch TEMPORARY SW Temporary switch R609 MICRO COMPUTER Fig. 8-1 The temporary switch is used to operate the air conditioner temporarily when the wireless remote control is lost or faulty. The air conditioner operates in the previous mode at the previously set temperature. However, when the power switch is set to OFF, it starts automatic operation.
- Page 57 1. Power Circuit REACTOR SPM2 Power P.W.B. DIODE TERMINAL STACK 1 BOARD 25A FUSE POWER RELAY COIL NF COIL1 (D25VB60) R002 R003 INRUSH CURRENT RELAY TB10 SURGE ABSORBER TB11 R001 TB12 VARISTOR2 L007 GRN1 C103 C017 L005 R009 GRN2 C014 L006 GRN3 C013...
- Page 58 (3) Smoothing capacitor (C501, C502, C503) This smoothes (averages) the voltage rectified by the diode stacks. Smoothing Capacitors SPM2 Fig. 1-2 Be careful to avoid an electric shock as a high voltage is generated. Also take care not to cause a short-circuit through incorrect connection of test equipment terminals.
- Page 59 2. Indoor/Outdoor Interface Circuit The interface circuit superimposes an interface signal on the DC 35V line supplied from the outdoor unit to perform communications between indoor and outdoor units. This circuit consists of a transmiting circuit which superimposes an interface signal transmit from the microcomputer on the DC 35V line and a transmiting circuit which detects the interface signal on the DC 35V line and outputs it to the microcomputer.
- Page 60 Fig. 2-1 shows the interface circuit used for the indoor and outdoor microcomputers to communicate with each other. R813 R812 C802 Q803 R810 IF transmit output (SDO) C804 R811 Micro computer C821 R821 IF receive input (SDI) I/F 0V C822 D101 Terminal board Indoor P.W.B.
- Page 61 0.7V Base of outdoor P.W.B Q801, Q802 , Q803 Outdoor micro computer lndoor micro computer SDO Pin SDI Pin 35V DC line 33ms. 100ms. 1 frame Leader Fig. 2-2 Voltages Waveforms of indoor / Outdoor Micro computers (Outdoor to Indoor Communications) Base of outdoor P.W.B Q801, Q802 Outdoor micro computer lndoor micro computer SDO Pin...
- Page 62 3. Power Module Circuit – 71 –...
- Page 63 DC 320-360V is input to power module and power module switches power supply current according to rotation position of magnet rotor. The switching order is as shown in Fig. 3-2. At point E: U + is ON, V – is ON (circuit in Fig. 3-1) At point F: U + is chopped (OFF), V –...
- Page 64 System Power Module 320-360V DC compressor motor U coil — — V coil — W coil DC current (Id) detection resistor Fig. 3-4 System Power module circuit (U + is OFF, V – is ON) Since current flows at point B only when U+ transistor and V – transistor is ON, the current waveform at point B becomes intermittent waveform as shown in Fig.
- Page 65 4. Power Supply Circuit Fig. 4-1 shows the power circuit. Fig. 4-1 Power circuit for P.W.B. There are two switching power supply in Power PWB. Switching power supply 1 is generating the secondary power for control circuits and DC35V indoor unit. Switching power supply performs voltage conversion effectively by switching transistor IC1 to convert DC330V to high frequency of approximately 20kHz to 200kHz.
- Page 66 (4) During OFF While IC1 is on, the following energy charges the primary windings of the transformer: Energy=LI /2. Here, L : Primary inductance I : Current when IC1 is off This energy discharges to the secondary windings during power off. That is, C707-C710, C718 is charged according to the turn ratio of each winding.
- Page 67 6. Rotor magnetic pole position detection circuit lnverter DC brushless motor for compressor R502 +12V R505 R504 R503 R501 R604 R603 R601 R602 R605 C605 R606 C606 R607 R608 R609 R610 C607 R611 Fig. 6-1 Rotor magnetic pole position detection circuit When the DC brushless motor is rotated, it also operates as power generator, generating reverse electromotive force according to number of rotations.
- Page 68 7. Peripheral circuit of microcomputer Fig. 7-1 shows the microcomputer and its peripheral circuits. Table 7-1, the basic operations of each circuit block, and Fig. 7-2, the system configuration. Outdoor Microcomputer Q205 (AX-6V01) Q212 R366 Reset C224 R345 terminal DC current Detection resistor R245 IP cutter...
- Page 69 8. Overload control circuit (OVL control circuit) Overload control is to decrease the speed of the compressor and reduce the load when the load on the air conditioner increases to an overload state, in order to protect the compressor, electronic components and power breaker.
- Page 70 9. Reset Circuit Outdoor Q205 Microcomputer Q212 (AX-6V01) R366 Reset C224 R345 Fig. 9-1 Reset circuit performs initial setting of the microcomputer program when power is turned on. Microcomputer resets program with reset voltage set to Lo, to enable operation at Hi level. Fig.
- Page 71 10. Temperature Detection Circuit The outdoor units (this model) provides with the outdoor temperature thermistor, DEF (defrost) thermistor, OH (overheat) thermistor and electric expansion valve thermistor so that they detect the temperatures of the unit and control the system. The circuit of the thermistors is shown as Fig. 10-1 for model RAS-80YHA, and their roles and temperature measuring points are shown as Table 10-1.
- Page 72 Table 10-1 Name and Role of each thermistor Name Connector No Measuring Point Role OH thermistor Compressor head The thermistors decide the defrost DEF thermistor Heat exchanger operation during heating combined the data of the outside temperature and its data. Outdoor temperature is used to Outdoor temperature Outside temperature...
- Page 73 When the connectors of the thermistors are disconnected or the thermistors is open or short, LD301 (red) lights and LD302 (red) blinks so that they indicate troubled parts. Combinations of LD301 and LD302 are set up for indicating troubled thermistors. The correspondences between the number of blink time and troubled parts are shown as Table 10-3. Look in the table (LD301 and LD302 blink) for troubled parts, and if the disconnections of them are checked out, they are replaced.
- Page 74 Electric expansion valve Table 11-1 The electric expansion valve is driven by DC 12V. Power is supplied to 1 or 2 phases of 4-phase winding to switch magnetic pole of winding in order to control opening degree. Relationship between power switching direction of phase and open/close direction is shown below. When power is supplied, voltages at pins 4 to 1 of CN15 are about 0.9V;...
- Page 75 12. Power Factor Control Circuit Power factor is controlled by almost 100%. (Effective use of power) With IC in ACT module, control is performed so that input current waveform will be similar to waveform of input voltage. I (input current) input voltage V (input voltage) Effective...
-
Page 76: Service Call Q & A
SERVICE CALL Q & A COOLING MODE The compressor has Check if the indoor heat If the air conditioner operates stopped suddenly during exchanger is frosted. in cooling mode when it is cooling operation. Wait for 3-4 minutes cold, the evaporator may get until it is defrosted. - Page 77 AUTO FRESH DEFROSTING Auto Fresh Defrosting is carried out : the After the ON/OFF button is pressed system checks the outdoor heat exchanger to stop heating, the outdoor unit is and defrosts it as necessary before stopping still working with the OPERATION operation.
- Page 78 OTHERS The heat exchanger temperature The indoor fan varies among This is because the cool is sensed in the auto speed mode. high air flow, low air flow and wind prevention function When the temperature is low, the breeze in the auto fan speed is operating, and does fan speed varies among high air mode.
-
Page 79: Trouble Shooting
TROUBLE SHOOTING PRECAUTIONS FOR CHECKING System power module 2 Power source DANGER — — — 1. Remember that the Compressor motor 0V line is biased to 155-170V in (0V) reference to the ground level. Indoor unit 2. Also note that it takes electric parts about 10 minutes DC35V... - Page 80 DISCHARGE PROCEDURE AND POWER SHUT OFF METHOD FOR POWER CIRCUIT Caution Voltage of about 300-330V is charged between both ends of smoothing capacitors During continuity check for each part of circuit in indoor unit electrical parts, disconnect red/gray WARNING lead wire connected from diode stack to system power module (SPM2) to prevent secondary trouble.
- Page 81 CHECKING THE INDOOR/OUTDOOR UNIT ELECTRICAL PARTS AND REFRIGERATING CYCLE Timer lamp See Troubleshooting when the timer lamp Does the timer lamp on the indoor unit blink? blinks . Remove the terminal cover and check the voltage between terminal (C) and terminal (D) Does the operation lamp on the indoor unit Terminal D Terminal C...
- Page 82 TROUBLESHOOTING WHEN TIMER LAMP BLINKS. Perform troubleshooting according to the number of times the indoor timer lamp and outdoor LD301 blink. SELF-DIAGNOSIS LIGHTING MODE Blinking of Timer lamp Reason for indication Possible cause Reversing valve defective (1) Reversing valve defective When the indoor heat exchanger (2) Heat exchanger thermistor dis- temperature is too low in the...
- Page 83 SELF-DIAGNOSIS LIGHTING MODE DD0002204A – 92 –...
-
Page 84: Checking Indoor Unit Electrical Parts
CHECKING INDOOR UNIT ELECTRICAL PARTS 1. Power does not come on (no operation) Is AC 220-240V AC being generated Is DC 35V being generated between Check AC outlet and breaker, and between terminals L and N on the terminals C and D on the terminal repair any defective part. - Page 85 2. Outdoor unit does not operate (but receives remote infrared signal) – 94 –...
- Page 86 3. Only indoor fan does not operate (other is normal) 4. Air deflector does not move (others are normal) Check the T001 and interface relay. 5. All systems stop from several seconds to several minutes after operation is started (all indicators are also off) Disconnect joint connector at indoor fan motor and set to the fan mode again.
- Page 87 6. Check the main P.W.B (power circuit) Is DC 35V being output D701 and C701 may be Is DC 35V being output between cathode and defective at terminals C and D? mode of D701 Is DC 12V being supplied There is a defective between accross the control side the 12V output of switching (coil terminal) of interface relay...
- Page 88 CHECKING THE REMOTE CONTROLLER – 97 –...
- Page 89 CHECKING THE OUTDOOR UNIT ELECTRICAL PARTS – 98 –...
- Page 90 – 99 –...
- Page 91 – 100 –...
- Page 92 – 101 –...
- Page 93 – 102 –...
- Page 94 POWER CIRCUIT Phenomenon 1 <Rotation speed does not increase> Recheck cord, etc. of the Is the DC voltage at least 350V? system power module. If they are disconnected, connect them securely. Is the OVL lamp lit? If the lamp is lit, it does not If abnormality continues, replace the system indicate fault, but the unit...
-
Page 95: Checking The Refrigerating Cycle
(JUDGING BETWEEN GAS LEAKAGE AND CHECKING THE REFRIGERATING CYCLE COMPRESSOR DEFECTIVE) 1. Troubleshooting procedure (No operation, No heating, No cooling) Lighting mode Blinks Blinks Blinks Blinks Blinks Blinks Connect U,V,W phase leads to the Self- 2 times 3 times 4 times 5 times 6 times 8times... - Page 96 HOW TO CHECK SYSTEM POWER MODULE Checking system power module using tester Set tester to resistance range (X 100) If indicator does not swing in the following conductivity check, the system power module is normal. (In case of digital tester, since built-in battery is set in reverse direction, + and – terminals are reversed.) CAUTION DANGER If inner circuit of system power module is disconnected (open), the indicator of tester will not swing and this may...
-
Page 97: How To Operate The Outdoor Unit Independently
HOW TO OPERATE USING THE SERVICE SWITCH THE OUTDOOR UNIT 1. Turn off the power supply to outdoor unit and then turn on again. 2. Remove the electrical box cover. LD303 (red) will light and the unit will operate in the forced cooling mode at this time. Never operate the unit for more than 5 minutes. - Page 98 SYSTEM POWER MODULE DIAGNOSIS Circuit diagram of Collector the device (excepting the BASE reflux diode) Emitter Circuit diagram of the module — Terminals symbol mark of the module See next page for measuring value using tester — L2 L1 – 107 –...
-
Page 99: Parts List And Diagram
PARTS LIST AND DIAGRAM INDOOR UNIT MODEL : RAS-80YH5A – 108 –... - Page 100 MODEL RAS-80YH5A PART N0. Q’TY / UNIT PARTS NAME RAS-80YH5A PMRAS-72CHA3 002 CABINET ASSY PMRAS-72CHA3 R13 MOUNTING PLATE PMRAS-80YHA FAN MOTOR PMRAS-80YHA TANGENTIAL FAN PMRAS-72CHA3 017 P-BEARING ASSY PMRAS-72CHA3 007 FAN MOTOR SUPPORT PMRAS-80YHA CYCLE ASSY PMRAS-72CHA3 005 BEARING COVER...
- Page 101 PARTS LIST AND DIAGRAM OUTDOOR UNIT MODEL : RAC-80YH5 – 110 –...
- Page 102 MODEL RAC-80YH5 PART N0. Q’TY / UNIT PARTS NAME RAC-80YH5 PMRAC-30CVP1 901 CABINET PMRAC-80YHA VALVE (5S) PMRAC-50NH4 VALVE (2S) PMRAC-80YHA COMPRESSOR PMRAC-80YHA STRAINER (COND) PMRAC-30CVP1 903 PROPELLER FAN PMRAC-81CHA3 909 SIDE PLATE PMRAC-80YHA BACK PLATE PMRAC-30CVP1 906 TOP COVER PMRAC-80YHA COIL (REVERSING VALVE) PMRAC-80YHA CONDENSER...
- Page 103 RAS-80YH5A / RAC-80YH5 PM NO. 0413E Printed in Malaysia...