TECHNICAL DATA & SERVICE MANUAL
Contents
1. FAULT TEMPERATURE COMPRESSOR FAN SENSOR eee OVERCURRENT PFC FAULT DAMAGED UNIT OVERTEMPERATURE Check sensor ion 7 3 conectori see section 7 AN and measure ue ti resistance of Measure the its resistance er compressor fan resistance of fuse blown motor windings Is inductor Is it YES it defective defective NO NO Replace the Mo sensor Y YES Replace fuse The fuse may be YES 100mA not fitted rightly Y Y Y Y in the fuseholder Replace the Replace Replace Replace the 4 compressor outdoor unit ae outdoor unit fan PCB PCB Check for right connection of communication wires Turn off power supply and after 3 minutes turn on again 22 7 7 AIR CONDITIONER OPERATES BUT ABNORMALITIES ARE OBSERVED 1 POOR COOLING OR HEATING Check the remote Try with Bass ver PCB Does the indoor unit controller settinas another KV assy receive the signal NO mast Pl remote gt assy may be be defective defective controller YES Is the remote controller Change the YES gt position of the remote controller directly under the airflow of the unit NO Set fan speed in YES medium or high speed s the fan motor set in low speed2. NO Check the air filters Are they clogged 5 Clean the air filters NO Check the expansion valve coil Is it right There is the gnty YES p gt possibilty of gas connected and the I shortage resistance value correct NO Y Replace the expansion valve coil 23 2 OPERATION DOES NOT SWITCH FROM HEAT TO COOL AND FROM COOL TO HEAT Remote controller Receiver assy unit may be defective may be defective Check the connection of reversing valve coil Check resistance of reversing valve coil 3 CHECK MODE BUTTON OPERATION ON THE UNIT Push the mode button The unit does not run p PCB assy is defective 4 CHECK REMOT E CONTROLLER UNIT Try to operate with another remote controller Does the unit run NO Check the IR receiver on the indoor unit Is it dirty NO Check the IR transmitter of the remote controller Is it dirty set The first remote controller is 5 defective or wrong address is Clean the IR transmitter of the remote controller Clean the IR receiver of the indoor unit 24 6 8 NOISY PROBLEM OUTDOOR UNIT TOO NOISY Check that all the pannel are fixed PP Us Check the p
3. CASE 1 There is a fault Normal leds signaling configuration I Y see section 6 6 see section 6 4 19 3 IN INDOOR UNIT THERE IS ONE LED BLINKING AT LEAST For the meanings of the faults see paragraph 5 17 TEMPERATURE FAULT ON THE COMMUNICATION SENSOR DAMAGED OUTDOOR UNIT ERROR Replace fuse Y Y Is the Check sensor communication connection and see section 7 7 fuse blown measure its resistance NO The fuse may be not fitted rightly in the fuseholder Replace the sensor Check for right connection of communication wires Check outdoor unit Is there any led on YES Y Turn off power supply and after 3 minutes turn on aqain Outdoor unit PCB assy is defective Replace outddor unit PCB 20 YES gt 100mA NO j gt see section 7 5 7 4 OUTDOOR UNIT DOES NOT RUN AND NO FAULT IS DISPLAYED Turn off power supply and after 3 minutes turn on again Does the external unit run NO YES but for few minutes CASE 1 Measure resistance indoor fan motor Is it defective YES Compressor tries to start every 3 NO Change fan minutes motor Indoor unit PCB assy is
4. Thermistor Room sensor NTC THERMISTOR Resistance 10 at 25 C 2 DIMENSIONAL DATA MTAFIAORSI MTAFBIAORSI 895 195 305 NARROW TUBE WIDE TUBE DRAIN HOSE 18 06 35 1 47 9 52 3 87 3 PERFORMANCE DATA 3 1 Air Throw Distance Chart MTAFIAORSI MTAFBIAORSI Room air temp 27 C Fan speed High Horizontal distance m oO EE 28 oS D 0 gt D 2 T e uon gt lt gt 3 4 Flap angle 02 Axis air velocity 0 Flap angle 30 Axis air velocity 30 Room air temp 20 C Fan speed High Horizontal distance m 1 2 3 4 5 6 7 Axis air verocity m s Vertical distance m Flap angle 452 Axis air velocity 45 Flap angle 60 Axis air velocity 60 4 ELECTRICAL DATA 4 1 Electric Wiring Diagrams MTAFIAORSI MTAFBIAORSI LINN H0001NO A A 3NI 1 H3M0d S3NIT 10 1 02 5441 82d GRN YEL 5 FUNCTION 5 1 System operation control The inputs to the systems come from indoor and outdoor sensors The outdoor unit is the MASTER system while the indoor one is the SLAVE system Communication between units is made with a 2 poles RS485 bus The indoor units receives the user input fan speed flap position etc through remote controller which sends signal every time a button is pressed and in any case automatically every 5 minutes 5 1 1 Control specification During
5. IFEEL button for at least 5 seconds pointing the remote control unit directly at the air conditioner receiver System starts and runs for 3 minutes After 3 minutes operation in case the setting is right the unit switches to COOL mode and stops set point 32 C the system is ready to operate in case the setting is wrong the STANDBY lamp flashes check the setting of indoor units and the connections of the refrigerant circuits 6 3 Changing the Address of the Air Conditioner In case of more than one air conditioner operating in the same room it may be necessary to assign an address to each unit in order to avoid operation conflicts Address is set acting on the dip switches located on the indoor PCB and on the remote controller The PCB settings must match the corresponding ones on the wireless remote controller How to change address of the air conditioner Set the PCB and the remote control to the address desidered UNIT ADDESS SW3 PCB DIP SWITCH REMOCON 1 2 2 3 unit unit B available available 17 7 TROUBLESHOOTING 7 1 CHECK BEFORE AND AFTER TROUBLESHOOTING A Check power supply wiring e Check the power supply wires are correctly connected B Check power supply Check that voltage is in specified range 10 of the rating Check that power is being supplied WARNING If the following troubleshooting must be done with power supplied be careful not to touch any uninsulated li
6. 18 Indoor unit jumpers Configuration 16 5 19 Outdoor unit jumpers Configuration 16 5 20 Contacts for building automation 16 6 INDOOR UNIT AND REMOTE CONTROL ADDRESS 17 6 1 Address Switches 17 6 2 Refrigerant Circuit Check 17 6 3 Changing the Address of the Air Conditioner 17 7 TROUBLESHOOTING 18 7 1 Check before and after troubleshooting 18 7 2 Circuit Breaker Trips or Fuse Blows 18 7 3 System does not run 19 7 4 Outdoor Unit does not run and no Fault is displayed 21 7 5 Only Outdoor Unit is Off 21 7 6 Outdoor Unit fault signaling 22 7 7 Air Conditioner operates but abnormalities aer observed 23 7 8 Noisy problem 25 8 CHECKING ELETRICAL COMPONENTS 26 8 1 Measurement of Insulation Resistance 26 8 2 Checking Continuity of Fuse on PCB Ass y 26 1 SPECIFICATIONS 1 1 Unit Specifications MTAFIAORSI MTAFBIAORSI Performance Capacity See catalogue with the requested matching Air circulation High Controls Temperature controls m3 h 530 Microprocessor I C thermostat Control unit Wireless remote control unit Timer ON OFF 24 hours Fan speed 4 and Auto Airflow direction Horizontal Manual Vertical Auto Air Filter Washable Anti Mold Power noise level High Med Low dB A 39 36 29 21 Refrigerant tubing connections Flare type Refrigerant tube diameter Narrow tube mm in 6 35 1 4 Wide tube mm in 9 52 3 8 Refr
7. 6 ASSY 8 3 Checking Motor Capacitor Remove the lead wires from the capacitor terminals and then place a probe on the capacitor terminals as shown in fig 7 Observe the deflection of the pointer setting the resistance measuring range of the multimeter to the maximum value The capacitor is good if the pointer bounces to a great extent and the gradually returns to its original position The range of deflection and deflection time deffer according to capacity of the capacitor 26 EATHER LINE PROBE COPPER TUBE OR METALLIC PART Fig 2 CLIP COPPER TUBE OR INSULATION METALLIC PART TESTER Fig 3 FROM FAN MOTOR CONPRESSOR AND OTHER PARTS METALLIC PART PROGE INSULATION TESTER Fig 4 FUSE l LTIMETER 1 CONPRESSOR MOTOR CAPACITOR FAN MOTOR CAPACITOR Fig 7 3 Technibel UME AVANCE DANS L AIR DU TEMPS R D 28 Reyrieux BP 131 01601 Tr voux CEDEX France T l 04 74 00 92 92 Fax 04 74 00 42 00 R C S Bourg en Bresse 759 200 728
8. We TECHNICAL DATA gt lt lechnibel amp SERVICE MANUAL UNE AVANCE DANS L AIR DU TEMPS INDOOR UNIT MTAFIAORSI MTAFBIAORSI SPLIT SYSTEM AIR CONDITIONER MTAFIAORSI 38 7104 075 MTAFBIAORSI 38 7104 076 0 8180 586 03 october 2012 IMPORTANT Please read before installation This air conditioning system meets strict safety and operating standards For the installer or service person it is important to install or service the system so that it operates safely and efficiently For safe installation and trouble free operation you must Carefully read this instruction booklet before beginning Follow each installation or repair step exactly as shown Observe all local state and national electrical codes Pay close attention to all warning and caution notices given in this manual he unit must be supplied with a dedicated electrical line A Um This symbol refers to a hazard or unsafe practice which can result in severe personal injury or death CAUTION This symbol refers to a hazard or unsafe practice which can result in personal injury or product or property damage If necessary get help These instructions are all you need for most installation sites and maintenance conditions If you require help for special problem contact our sale service outlet or your certified dealer for additional instructions In case of improper installation The manufacturer shall in no way be responsible for imprope
9. ctivates only in case of diagnostic signaling 5 16 Capacity Test Mode This is a special operating mode used EN when testing the performance of the A C In this case the main components of the A C compressor outdoor fan indoor fan expansion valve yg PE a operate at fixed settings This option is activated shorting the JP1 and JP3 jumpers OCT 013 014 DLS DL6 DL7 on the outdoor pcb and setting the remote controller of both limits according to the following Idd I Led E 00 COOLING MODE pe C400 HE Setpoint 10 I FEEL OFF FTN HEATING MODE GU nm 12191 I2C T Setpoint 32 C I FEEL OFF ya t 9 D Ul ken 14 5 17 Diagnostic With this feature is possible to have a visual signal that a trouble is occurring This mode is always active and the signalling is made through the display board LEDS In case of no troubles the LEDS status follows its normal function The detected troubles are showed to the user technician using the 3 leds of the indoor unit receiver and the 5 leds on the outdoor pcb For each fault there are different effects upon the operation of the A C NOTES e The troubles are showed according to a priority list that is in case of more than one trouble present is always showed at first the one with the highest priority 3 gt 2 gt 1 etc e Sensor damaged means a situation where sensor is short circuited or opened Incas
10. cycle 13 5 12 I FEEL Function s standard configuration the air conditioner operates detecting the room temperature through the sensor equipped in the wireless remote controller icon I FEEL shown on the display This feature provides a personalised environment since the temperature can be detected where the remote controller is located It is possible to de activate this option pressing the I FEEL button on the remote controller In this case the I FEEL icon is no longer displayed and room temperature is detected through the sensor included in the indoor unit 5 13 HI POWER Mode When this mode is active the internal fan speed is set automatically and the air conditioner operates for 15 minutes at the maximum power After 15 minutes from the selection the mode is automatically switched off 5 14 NIGHT Function When this setting is active indoor fan speed is automatically reduced in order to allow low noise operation Temperature control acts in the same way as NORMAL MODE but after 60 minutes of operation the air conditioner modifies automatically the set point temperature according to the following e COOLING DRY 1 C HEATING 2 C 5 15 LED OFF Function This is a special function mode which can be selected by the user pressing at the same for more than 5 seconds the IFEEL and FAN buttons on the remote controller With this option active the OPERATION TIMER and STANDBY lamps are switched off even during operation they a
11. defective he fan could be braked by foreign matter Can the fan be turned NO Y YES Remove the foreign Check outdoor fan matter motor electrical connection Y Replace the fan motor 7 5 ONLY OUTDOOR UNIT IS OFF Check fuse on outdoor pcb Is the fuse blown YES NO Y There is a possibility of short circuit Check EMI filter Check compressor operation for 3 minutes at least CASE 3 CASE 2 Y Compressor hisses intermittently Check the compressor electrical connection i YES Replace the compressor Compressor doesn t run easure the resistance _ compressor motor windings Is it defective NO Y Outdoor unit PCB assy is defective EMI filter check up pin1 2 lower than 0 5 ohm pin3 4 lower than 0 5 ohm all other pin combination no continuity 21 Is it defective NO Check all the electrical parts compressor YES fan motor Y inversion valve coil Y crank case heater Outdoor unit PCB assy Base heater Change EMI filter Is defective defrost valve coil 7 6 OUTDOOR UNIT FAULT SIGNALING IN OUTDOOR UNIT THERE IS ONE LED BLINKING AT LEAST For the meanings of the faults see paragraph 5 17
12. e of damaged sensors the system CM FMO FMI etc if in OFF state does not start Priority INDOOR UNIT FAULT LEDS status EFFECTS LD1 tmr LD2 opr LD3 LD4 EN tmr RAT probe damaged O F F O system does not operate probe damaged oo Feo as soon as fault is cleared the system ee SEER automatically restart after 3 min 1 on outdoor unit o during this time the signalling is showed wrong mode selected system does not operate to restart the system select correct mode O LED off F LED blinking e LED on 15 5 18 Indoor Unit Jumpers Configuration JP1 JPZ n Unit is shipped with jumpers set according to the following table JUMPER STATUS JP 1 open JP open JP2 open JP open 5 19 Outdoor Unit Jumpers Configuration JUMPERS SETTINGS gt 9 G PI JP2 DAT CDT DET PI JG DLA 05 OLE OLT rat 69 9 O O O O O ui ns OG T EXP VALVE 5 20 Contacts for Building Automation 5 20 1 Input Contact J11 green Unit is shipped with jumpers set according to the following table AEI1G50 Lum men _ closed JP1 open The status of this input affects system operation according to the following Contact OPEN system does not operate always OFF inputs from wireless remote controller are not processed Contact CLOSED system operate
13. he other settings High Med Low 5 3 Heat Mode Operation The Heating mode operation is similar to the Cooling mode operation The CM FMO and FMI are controlled by the same parameters NOTES 1 After the CM has stopped the FMI runs for 30s in order to purge heat from the indoor coil 2 The FMI will not be turned on until the indoor coil temperature is warm enough to prevent the supply of cold air see COLD DRAFT PREVENTION feature for details The indoor fan can change speed only after it has operated at the same speed for 30 sec if in AUTO and 1 sec for the other settings High Med Low 5 4 Auto Mode Operation not available mode 5 5 Dry Mode Operation Dry operation remove moisture from indoor air running in cooling mode at a low level without reducing the ambient temperature This is done cycling ON and OFF indoor and outdoor units according to below DRY LEVEL ROOM TEMP gt SPT 2 C LEVEL 0 lt SPT 2 gt SPT 1 G Operation according to COOLING mode CM on at constant speed FMO on at constant speed FMI switches between L and LL every 30 seconds RV off CM switches 9 minutes off and 3 minutes on FMO switches 9 minutes off and 3 minutes ON FMI switches between L and LL every 30 seconds RV off CM off lt 15 DRY OFF ZONE FMO off FMI off RV off SPT Set Point Temperature LEVEL 1 lt SPT 1 LEVEL 2 gt 15 C 5 6 Fan Mode Operation With this mode the indo
14. igerant R410A Refrigerant tube kit Air clean filter Dimensions amp Weight Unit dimensions Height Optional Optional 305 Width 895 Depth 195 110 Built in Package dimensions Height 350 Width 950 Depth 265 Weight Net 12 00 Shipping 13 Shipping volume 0 088 DATA SUBJECT TO CHANGE WITHOUT NOTICE 1 2 Major Component Specifications MTAFIAORSI MTAFBIAORSI Controller PCB SAG DCI IDU Microprocessor 250 V 3 15 A Fan amp Fan Motor Type Cross flow Dia and lenght 1 0 90 5 L 669 5 Fan motor model Q ty KFV4Q 11SB5P 1 No Of poles rpm 230 V Hi 4 1160 Nominal output 10 Coil resistance Ambient temp 20 C BRN WHT 561 8 VLT WHT 197 4 VLT ORG 63 4 YEL ORG 155 7 YEL PNK 115 9 safety devices Type internal fuse Operating temp Open 145 5 Close Run capacitor Functional Flap Motor Aesthetics Flap Stepping motor MP2422 MP24Z DC 12 V 380 7 Aluminium plate fin Copper tube 1 3 Face area 0 150 DATA SUBJECT TO CHANGE WITHOUT NOTICE 1 3 Other Component Specifications MTAFIAORSI MTAFBIAOR5I 0028TRA008 Primary AC 230 V 50 Hz Secondary 13 V 6VA Rating Capacity Coil resistance Q at 25 Primary Secondary 120 Thermal cut off temp Thermistor Coil sensor NTC THERMISTOR Resistance 10 at 25
15. n aluminium fins on the air conditioner can cut your fingers When installing In a ceiling or wall Make sure the ceiling wall is strong enough to hold the unit weight It may be necessary to build a strong wooden or metal frame to provide added support Ina room Properly insulate any tubing run inside a room to prevent sweating which can cause dripping and water damage to walls and floors In moist or uneven locations Use a raised concrete base to provide a solid level foundation for the outdoor unit This prevents damage and abnormal vibrations In area with strong winds Securely anchor the outdoor unit down with bolts and a metal frame Provide a suitable air baffle In snowy area for heat pump type systems Install the outdoor unit on a raised platform that is higher than drifting snow Provide snow vents When connecting refrigerant tubing Keep all tubing runs as short as possible Use the flare method for connecting tubing Apply refrigerant lubricant to the matching surfaces of the flare and union tubes before connecting them screw by hand and then tighten the nut with a torque wrench for a leak free connection Check carefully for leaks before starting the test run NOTE Depending on the system type liquid and gas lines may be either narrow or wide Therefore to avoid confusion the refrigerant tubing for your particular model is specified as narrow tube for liquid wide
16. ng the compresor speed The system exit this protection routine when ICT temperature rises above 8 C 5 9 2 Cold draft This feature prevents the supply of cold air forcing the indoor fan to a speed which cannot be changed by the user As soon as the protection mode Is exited soeed can be changed manually through the remote controller The protection acts in the following Y Fans peed be ICT gt 32 C gt changed manually N Indoor fan speed Any LLOW Stop 25 28 30 32 Indoor coil temperature ICT C 5 9 3 Overheat This feature prevents the build up of high pressure in the indoor heat exchanger during heating operation As soon as the indoor coil temperature ICT increases compressor speed is reduced in order to avoid heat exchanger overheating System stops compressor operation when ICT reaches 60 C 12 5 10 Protection Operations on Outdoor Unit 5 10 1 Overheating During cooling operation as soon as the outdoor coil temperature OCT increases compressor speed is reduced in order to avoid heat exchanger overheating System stops compressor operation when OCT reaches 60 C 5 10 2 Compressor discharge temperature During operation as soon as the discharge temperature increases CDT compressor speed is reduced in order to avoid overheating of the motor Compressor is stopped when CDT reaches 105 C 5 10 3 Compressor power module overheating The module temperatu
17. operation compressor speed can be subjected to change due to thermal load variations or protection activations but in any case The minimum time interval between an OFF and ON operation is not lower than 3 minutes The minimum operating time is not lower than 3 minutes The acceleration deceleration rate is fixed at 50rom sec During the start up compressor speed increases according to a defined rule which is independent from the thermal load calculation 5 1 2 Available Not Available mode if a not available mode combination is selected example unit A heat mode and unit B cool mode indoor unit stop AVAILABLE NOT AVAILABLE MODE leds TMR 6 and STB 7 is blinking and led OPR 8 is on Ge ee INDOOR UNIT A e 3 e AUTO HEAT em 2 O O a lt B AVAILABLE NOT AVAILABLE 5 2 Cool Mode Operation In Cooling Mode the operation of the compressor CM Outdoor Fan FMO and Indoor Fan FMI are determined by 1 the difference between the room air temperature RAT and the set point temperature SPT 2 the protection level at which the system is operating NOTES In addition to the temperature difference of above the operation of the main components CM FMO FMI is also controlled by protection function The minimum off time of compressor is 3 minutes The indoor fan can change speed only after it has operated at the same speed for 30 sec if in AUTO and 1 sec for t
18. or fan is turned on while CM FMO and RV stay off all the time The user can select between 3 speeds HIGH MEDIUM and LOW 5 7 Auto Fan Speed With this option selected the indoor fan speed changes automatically according to the compressor speed as shown in the following graphs fan motor speed HIGH MED LOW LLOW to prevent the supply of cool air the FMI speed is setted as shown only if the indoor coil temperature ICT gt 32 C COOLING fan motor speed HEATING Q O 2 I low medium high Rpm i compressor low medium MMI d di see COLD DRAFT PREVENTION feature for details gt Rpm compressor 5 8 Forced Mode In this mode the system operates COOLING or HEATING mode fixed settings or is switched off by means of the MODE button on the indoor unit control board The operation modes can be selected pressing the button in cyclic way OFF gt COOL gt HEAT gt OFF The settings are COOLING mode HEATING mode SET POINT temperature 25 C SET POINT temperature 21 C FAN SPEED HIGH FAN SPEED HIGH FLAP POSITION 3 FLAP POSITION 4 5 9 Protection Operations Indoor Unit 5 9 1 Freeze up This protection prevents ice formation on the indoor coil heat exchanger The protection is activated as soon as the indoor coil temperature ICT decreases and acts by decreasi
19. osition of cushion rubbers under the compressor Check that internal tubes are not touching each other or with other components 25 Add dampers under the unit 8 CHECKING ELETRICAL COMPONENTS 8 1 Measurement of Insulation Resistance The insulation is in good condition if the resistance exceeds 1 Mohm a Power Supply Wires Clamp the earthed wire of the power supply wires with the lead clip of the insulation resistance tester and measure the resistance by placing a probe on either of the power wires fig 1 Then measure the resistance between the earthed wire and the other power wires fig 1 b Unit Clamp an alluminium plate fin or copper tube with the lead clip of the insulation resistance tester and measure the resistance by placing a probe on N terminal and then on Lterminal the terminal plate fig 2 c Measurement of Insulation Resistance for Electrical Parts Disconnect the lead wires of the disired electric part from terminal plate PCB assy capacitor etc Similary disconnect the connector Then measure the insulation resistance fig 1 to 4 Refer to electric wiring diagram NOTE If the probe cannot enter the poles because the hole is too narrow then use a probe with a thinner pin 8 2 Checking Continuity of fuse on PCB assy Remove PCB assy from electrical component box fig 5 FUSE Then pull out the fuse from PCB assy Check continuity of fuse by the multimeter fig
20. r installation or maintenance service including failure to follow the instructions in this document SPECIAL PRECAUTIONS During installation connect before the refrigerant system and then the wiring one proceed in the reverse orden when removing the units BEG when wiring ELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL INJURY DEATH ONLY QUALIFIED EXPERIENCED ELECTRICIANS SHOULD ATTEMPT TO WIRE THIS SYSTEM Do not supply power to the unit until all wiring and tubing are completed or reconnected and checked to ensure the grounding Highly dangerous electrical voltages are used in this system Carefully refer to the wiring diagram and these instructions when wiring Improper connections and inadequate grounding can cause accidental injury and death Ground the unit following local electrical codes The Yellow Green wire cannot be used for any connection different from the ground connection Connect all wiring tightly Loose wiring may cause overheating at connection points and a possible fire hazard Do not allow wiring to touch the refrigerant tubing compressor or any moving parts of the fan Do not use multi core cable when wiring the power supply and control lines Use separate cables for each type of line When transporting Be careful when picking up and moving the indoor and outdoor units Get a partner to help and bend your knees when lifting to reduce strain on your back Sharp edges or thi
21. re detected by a built in thermistor is always monitored by the control system and kept operating in a safe area If temperature exceeds 100 C operation is automatically stopped 5 10 4 Outdoor fan power module overheating The module temperature detected by a built in thermistor is always monitored by the control system and kept operating in a safe area If temperature exceeds 100 C operation is automatically stopped 5 10 5 Compressor power module overcurrent In case of current driven to each motor phase greater than 10 A operation is automatically stopped 5 10 6 Outdoor fan power module overcurrent In case of current driven to each motor phase greater than 400mA operation is automatically stopped 5 11 Defrost 5 11 2 Defrost The defrost process is controlled by a detection algorithm designed in order to mantain optimal utilization of the heat pump capacity especially during negative outdoor temperature conditions Compressor speed fixed Expansion valve opening fixed Outdoor fan switched off Indoor fan switched off Defrost valve switched on open Reversing valve switched on heating operation NOTES Minimum defrost time interval is 2 minutes During HIGH POWER operation the defrost detection is ignored until this mode remains active e System exits defrost protection as soon as 14 C on the outdoor coil are detected and in any case if at least 12 minutes are elapsed from the start of the defrost
22. s in the normal way according to the inputs coming from wireless remote controller INPUT CONTACT CONNECTOR J11 GREEN STATUS CLOSED 5 20 2 Output Contact J20 red OUTPUT CONTACT CONNECTOR J20 RED USED TO SIGNAL AN ALARM CONDITION This connector is directly tied to the contact normally open of a power relay which activates every time the following alarm condition occur RAT damaged ICT damaged Communication error Fault on outdoor unit In this case when alarm happens on poles 1 and 3 of J20 connector 220 VAC 50Hz are available Max electrical load 1A 240VAC 6 INDOOR UNIT AND REMOTE CONTROL ADDRESS 6 1 Address Switches INDOOR UNIT A INDOOR UNIT B Check that the setting of switches SW1 and SW3 on the pcb Set the switches SW1 and SW3 on the pcb and dip switch of remote control correspond to the figure and dip switch of remote control as shown in the figure indoor unit PCB indoor unit PCB SW1 SW3 SW1 SW3 1 off 1 off 1 1 on 2 off 2 off 2 off 2 off PCB factory state remote control unit remote control unit dip switch is located on the battery compartment dip switch is located on the battery compartment 1 off 1 on 2 off 2 off 3 on 3 on 4 on 4 on remote control factory state 6 2 Refrigerant Circuit Check 1 Power ON the system 2 Set the remote controller of the unit A as following unit B must be OFF mode COOLING filter ON set point 32 C 3 Press FAN
23. tube for gas When servicing Turn the power OFF at the main power board before opening the unit to check or repair electrical parts and wiring Keep your fingers and clothing away from any moving parts Clean up the site after the work remembering to check that no metal scraps or bits of wiring have been left inside the unit being serviced Ventilate the room during the installation or testng the refrigeration system make sure that after the installation no gas leaks are present because this could produce toxic gas and dangerous if in contact with flames or heat sources Table of Contents Page 1 SPECIFICATIONS 4 1 1 Unit specifications 4 1 2 Major Component specifications 5 1 3 Other Component specifications 6 2 DIMENSIONAL DATA 7 3 PERFORMANCE DATA 8 3 1 Air Throw Distance Chart 8 4 ELECTRICAL DATA 9 4 1 Electric Wiring Diagrams 9 5 FUNCTION 10 5 1 System operation control 10 5 2 Cool Mode Operation 10 5 3 Heat Mode Operation 10 5 4 Auto Mode Operation 11 5 5 Dry Mode Operation 11 5 6 Fan Mode Operation 11 5 7 Auto Fan Speed 11 5 8 Forced Made 12 5 9 Protection Operations in indoor unit 12 5 10 Protection Operation outdoor unit 13 5 11 Defrost 13 5 12 I Feel Function 14 5 13 Hi Power mode 14 5 14 Night Function 14 5 15 Leds off function 14 5 16 Capacity Test Mode 14 5 17 Diagnostic 15 5
24. ve part that can cause electric shock 7 2 CIRCUIT BREAKER TRIPS OR FUSE BLOWS When circuit breaker is set to ON it trips in a few moments Resetting is not possible Measure insulation resistance There is a possibility of ground fault If resistance value is 1 Mohm or less insulation is defective 18 7 3 SYSTEM DOES NOT RUN 1 THERE IS NO SIGNALING LED ON INDOOR UNIT Check power supply Is power being supplied YES to wall receptacle The pcb assy defective NO Check fuse on indoor pcb Is the fuse blown YES The receiver m Y assy is Circuit un disconnected breaker is Power failure There is a possibility defective tripped of short circuit Y Y YES Wait for Reset the NE contact Measure resistance of breaker power fan motor winding company 2 IN INDOOR UNIT THERE IS ONE LED ON AT LEAST AND THE UNIT RECEIVES THE REMOTE CONTROL SIGNAL Reduce the set point temperature in NO cooling mode or increase the set point in heating mode Is the set point temperature appropriate YES Is the unit in protection mode see par 5 9 e 5 10 YES Wait some minutes to NO restore normal condition Y Check outdoor unit leds CASE 2 signaling see par 5 17
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