TECHNICAL DATA & SERVICE MANUAL SPLIT SYSTEM AIR
Contents
1. Is the Y Y YES gt communication fuse blown Check sensor connection and See section 6 6 measure its resistance NO The fuse may be not fitted rightly in the fusehol Replace the in the fuseholder 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 again Outdoor unit PCB assy is defective Replace outddor unit PCB 22 Replace fuse 100mA NO gt See section 6 5 6 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 Check compressor operation CASE 3 CASE 1 for 3 minutes at least easure resistance o indoor fan motor Is it CASE2 defective YES Y Compressor Compressor tries to start A Compressor every 3 int ittentl doesn t run NO Change fan minutes intermittently motor Indoor unit PCB assy is Gheckihe defective he fan could be braked b compressor foreign matter j electrical easure the resistance o connection compressor motor Can the fan2. E 2 2 14 m lt B AVAILABLE O NOT AVAILABLE 4 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 3 the thermal load in the room 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 the other settings High Med Low 4 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 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 10 4 4 Auto Mode Operation only monosplit RAT SPT C ON CM OFF COOLING HEATING COOLING A X 89 A Y In Auto Mode the unit switches automatical
3. FMO and RV stay off all the time The user can select between 3 speeds HIGH MEDIUM and LOW 4 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 A COOLING A fan motor fan motor HEATING speed speed HIGH HIGH MED MED I LOW LOW I LLOW i LLOW i low high Rpm low high Rpm compressor compressor to prevent the supply of cool air the FMI speed is setted as shown only if the indoor coil temperature ICT 2 32 C see COLD DRAFT PREVENTION feature for details 12 4 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 a cyclic way OFF gt COOL gt HEAT gt OFF The settings are COOLING mode SET POINT temperature 25 C FAN SPEED HIGH FLAP POSITION 3 HEATING mode SET POINT temperature 21 C FAN SPEED HIGH FLAP POSITION 4 4 9 Protection operations indoor unit 4 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 decreasing the compresor speed The system exit this protection routine when ICT temperature rises above 5 C 4 9 2 Cold draft This feature prevents
4. O Lam bs E 109 Na NONE thi Em lt Roca nda et gt VE Fe 4 FUNCTION 4 1 System operation control The inputs to the systems come from indoor and outdoor sensors The outdoor unit is the system MASTER while the indoor one is the SLAVE 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 4 1 1 control specification During operation compressor speed can be subjected to change due to thermal load variations or protection activations but in any case he minimum time interval between an OFF and a ON operation is not lower than 3 minutes e The minimum operating time is not lower than 3 minutes The maximum acceleration deceleration rate is fixed at 20rpm sec During the start up compressor speed increases according to a defined rule which is independent from the thermal load calculation 4 1 2 Multisplit available modes If the unit is a part of a multisplit system there could be some mode combination not available example unit A heat mode and unit B cool mode In this case the system automatically stops leds TMR and STB blink while led OPR is on e S Ud 22 ccce ED 1 LED blinking e LED on AVAILABLE MODE COMBINATION TABLE INDOOR UNIT A HEAT DRY COOL e
5. COOL AND FROM COOL TO HEAT Remote controller Receiver assy Check the connection Check resistance of unit may be defective may be defective of reversing valve coil reversing valve coil 3 CHECK MODE BUTTON OPERATION ON THE UNIT Push the mode button gt The unit does not run assy is defective 4 CHECK REMOTE CONTROLLER UNIT The first remote controller is YES t defective or wrong address is set Try to operate with another remote controller Does the unit run NO Check the IR receiver on the indoor unit Is it dirty Clean the IR transmitter of the remote controller NO Check the IR transmitter of th remote controller Is it dirty Clean the IR receiver of the indoor unit 26 6 8 NOISE PROBLEM OUTDOOR UNIT TOO NOISY Check that all the pannel are fixed Check the position of cushion rubbers under the compressor Check that internal tubes are not touching each other or with other components 27 Add dampers under the unit 7 CHECKING ELETRICAL COMPONENTS 7 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
6. Net Shipping DATA SUBJECT TO CHANGE WITHOUT NOTICE 1 2 Major Component Specifications SDIAS8 Controller PCB Part No SAC DCI IDU Controls Microprocessor Control circuit fuse 250 V 3 15 A Fan amp Fan Motor Centrifugal fan Dia and lenght 2 0 130 L 180 Fan motor model Q ty K35406 MO2046 1 No of poles rpm 230 V High 4 1040 Nominal output 9 Running mps 0 17 Power input 37 Coil resistance Ambient temp 25 C GRY WHT 605 WHT PNK 151 WHT VLT 130 VLT ORG 67 ORG YEL 150 oafety devices Type Thermal protection Operating temp Open 150 5 Close Automatic reclosing Run capacitor 1 2 440 Aluminium plate fin Copper tube 1 8 0 192 DATA SUBJECT TO CHANGE WITHOUT NOTICE 1 3 Other Component Specifications 0028TRA008 Primary AC 230 V 50 Hz Secondary 13 V GVA Capacity Coil resistance O at 25 C Primary Secondary Thermal cut off temp 120 C Thermistor Coil sensor NTC THERMISTOR Resistance kQ 10 at 25 C Thermistor Room sensor NTC THERMISTOR Resistance kQ 10 at 25 C 2 DIMENSIONAL DATA 3 ELECTRICAL DATA 3 1 Electric Wiring Diagram LINN 3NI I H000LN0 OL 7051309 cNa T Nd NH8 GRN YEL AMD AMD 1HM 1HM LIA LIA 940 940 13 734 N 2 d m Pla Ape ub dle Ses ed Un s ee z IK IT LLL Gu N xa a 9c
7. When installing In a ceiling Make sure the ceiling is strong enough to hold the unit weight It may be necessary to build a strong wooden or metal frame to provide added support In a 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 lh a snowy area for heat pump type systems Install the outdoor unit on a raised platform that is higher then 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 tube for gas When servicing Turn the power OFF at the main power board bef
8. 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 A unit B available available For monosplit all combinations are available 19 6 TROUBLESHOOTING 6 1 CHECK BEFORE AND AFTER TROUBLESHOOTING A Check power supply wiring 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 live part that can cause electric shock 6 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 20 6 3 SYSTEM DOES NOT RUN 1 THERE IS NO SIGNALING LED ON INDOOR UNIT Check power supply Is power being supplied to
9. wall receptacle Circuit breaker is tripped Y Reset the breaker Power failure Y Wait for recovery or contact power company YES Check fuse on indoor The pcb assy is defective pcb Is the fuse blown YES Y There is a possibility of short circuit YES Y Measure resistance of fan motor winding NO The receiver assy is disconnected or defective 2 IN INDOOR UNIT THERE IS ONE LED ON AT LEAST AND THE UNIT RECEIVES THE REMOTE CONTROL SIGNAL mode see par 4 9 e 4 10 Is the set point temperature appropriate YES Is the unit in protection NO Y NO Reduce the set point temperature in gt cooling mode or increase the set point in heating mode Check outdoor unit leds signaling see par 4 18 CASE 1 Normal leds configuration see section 6 4 YES Wait some minutes to restore normal condition CASE 2 There is a fault signaling see section 6 6 21 6 3 SYSTEM DOES NOT RUN 3 IN INDOOR UNIT THERE IS ONE LED BLINKING AT LEAST For the meanings of the faults see paragraph 4 17 TEMPERATURE FAULT ON THE COMMUNICATION SENSOR DAMAGED OUTDOOR UNIT ERROR
10. 20 VAC 50Hz are available Max electrical load 1A 240VAC 5 INDOOR UNIT AND REMOTE CONTROL ADDRESS 5 1 Address Switches only for multisplit 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 0n 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 17 off 17 on 2 off 2 off 3 on 3 on 4 on 4 on remote control factory state 5 2 Refrigerant Circuit Check only for multisplit 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 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 5 3 Changing the Address of the Air Conditioner In case of more
11. TECHNICAL DATA amp SERVICE MANUAL INDOOR UNIT SDIAS8 Model No Product Code N y ModelNo Product Code No SDIAS8 38 7006 180 0 8180 578 01 09 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 WARNING This symbol refers to a hazard or unsafe practice which can result in severe personal injury or death JN 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 a 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 improper installation or maintenance service including failure to follow t
12. be turned on windings Is it defective NO Y YES Replace the Y YES compressor NO Remove the Y Y foreign Check outdoor fan pone matter motor electrical decine connection Y Replace the fan motor 6 5 ONLY OUTDOOR UNIT IS OFF EMI filter check up YES Check fuse on outdoor pin1 2 lower than 0 5 ohm pcb Is the fuse blown pin3 4 lower than 0 5 ohm all other pin combination no continuity NO Y There is a possibility of short circuit Check EMI filter 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 23 6 6 FAULT ON OUTDOOR UNIT IN OUTDOOR UNIT THERE IS ONE LED BLINKING AT LEAST For the meanings of the faults see paragraph 4 18 TEMPERATURE ell ON THE pri INDOOR DAMAGED UNIT Check sensor connection and measure its resistance Replace the sensor COMPRESSOR FAN PEOR bo OVERCURRENT OVERTEMPERATURE PFC FAULT See section 6 3 YES Is the communication fuse blown NO Y Measure the resistance of compressor fan 100mA Replace fuse The fuse may be not fitted
13. he 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 REGINA when wiring ELECTRICAL SHOCK CAN CAUSE SEVERE IN PERSONAL INJURY OR DEATH ONLY QUALIFIED EXPERIENCED ELECTRICIANS SHOULD ATTEMPT TO WIRE THIS SYSTEM e Do not supply power to the unit until all wiring and tubing are completed or reconnected and checked to ensure the grounding e 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 thin aluminium fins on the air conditioner can cut your fingers
14. ion time deffer according to capacity of the capacitor 28 PCB ASS Y EATHER LINE PROBE TERMINAL PLATE c Ww PROBE ud Pa 1 ff a COPPER TUBE OR METALLIC PART CLP sait COPPER TUBE OR INSULATION METALLIC PART TESTER Fig 3 FROM FAN MOTOR COMPRESSOR AND OTHER PARTS METALLIC PART INSULATION TESTER Fig 4 FUSE Fig 5 Fig 6 COMPRESSOR MOTOR CAPACITOR FAN MOTOR CAPACITOR Fig 7 argo chima spa Via Varese 90 21013 Gallarate Va Italy Tel 39 0331 755111 Fax 39 0331 776240 www argoclima com
15. ly between the Auto Cooling and Auto Heating in order tc maintain the room temperature RAT at the prescribed set point SPT The switching between the two modes is according to the above graph and following table COOLING gt HEATING If 3 C lt Dt s 1 C and the compressor is off for more than 1 hour If Dt lt 3 C and compressor is off for more than 3 minutes HEATING gt COOLING If 1 C lt Dt s 3 C and the compressor is off for more than 1 hour If Dt 2 3 C and compressor is off for more than 3 minutes Dt RAT SPT Refer to the sections 4 1 COOLING MODE and 4 2 HEATING MODE for system operation details 11 4 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 ROOM TEMP gt SPT 2 C LEVEL 0 Operation according to COOLING mode CM on at constant speed SPT 2 C LEVEL 1 FMO on at constant speed gt SPT 1 C FMI switches between L and LL every 30 seconds RV off CM switches 9 minutes off and 3 minutes on lt SPT 1 C LEVEL 2 FMO switches 9 minutes off and 3 minutes ON gt 15 C FMI switches between L and LL every 30 seconds RV off CM off lt 15 C DRY OFF ZONE FMO off FMI off DRY LEVEL RV off SPT Set Point Temperature 4 6 Fan Mode Operation With this mode the indoor fan is turned on while CM
16. ng the performance of the A C In this case the main components of the A C compressor outdoor fan indoor fan operate at fixed settings This option is activated shorting the JP1 and JP3 jumpers on the outdoor pcb and setting the remote controller according to the following COOLING MODE Setpoint 10 C FEEL OFF HEATING MODE Setpoint 32 C I FEEL OFF JUMPERS SETTINGS EXP VALVE El at 16 4 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 receive and the 5 leds on the outdoor pcb For each fault there are different effects upon the operation of the A C NOTES 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 1 gt 2 gt 3 etc Sensor damaged means a situation where sensor is short circuited or opened n case of damaged sensors the system CM FMO FMI etc if in OFF state does not start EA LEDS status ME A F O System does not operate To restart the system 3 ICTprobedamaged F O F power re setting off on is required The A C switches off As soon as fault is 1 faultt
17. on 18 5 INDOOR UNIT AND REMOTE CONTROL ADDRESS 19 5 1 Address Switches only for multisplit 19 5 2 Refrigerant Circuit Check only for multisplit 19 5 3 Changing the Address of the Air Conditioner 19 6 TROUBLESHOOTING 20 6 1 Check before and after troubleshooting 20 6 2 Circuit Breaker Trips or Fuse Blows 20 6 3 System does not run 21 6 4 Outdoor Unit does not run and no Fault is displayed 23 6 5 Only Outdoor Unit is Off 23 6 6 Fault on outdoor unit 24 6 7 Air Conditioner operates but abnormalities are observed 25 6 8 Noise problem 27 7 CHECKING ELETRICAL COMPONENTS 28 7 1 Measurement of Insulation Resistance 28 7 2 Checking Continuity of Fuse on PCB Assy 28 7 3 Checking motor capacitor 28 1 SPECIFICATIONS 1 1 Unit Specifications SDIAS8 220 240V 50Hz Voltage rating 230V Performance Capacity oee catalogue with the requested matching Air circulation High Med Low m h 520 430 390 Features Controls Temperature controls Microprocessor C thermostat Remote Controller Option wireless remote control wall receiver ON OFF 24 hours amp Daily program 1 hour OFF 3 and Auto Washable Sound pressure level high med low 43 35 28 Refrigerant tubing connections Flare type Refrigerant Narrow tube in 6 35 1 4 tube diameter Wide tube in 9 52 3 8 Refrigerant R410A Dimensions amp Weight Dimensions Height Width Depth Package dimensions Height Width Depth Volume
18. onoutdoorunt O O cleared the system automatically restart wrong mode selected F F system does not operate To restart the system O LED off F LED blinking e LED on 17 4 18 Indoor Unit Jumpers Configuration Unit is shipped with jumpers set according to the following table JPI JPZ n JUMPER STATUS 4 19 Outdoor Unit Jumpers Configuration Unit is shipped with jumpers set JUMPERS SETTINGS according to the following table JF 1 JP COT OC JPl DL3 ba DS OLE DI va JUMPER STATUS PENTE JUMPER Lada Loue open JP1 T DCT EXP VALVE 4 20 Contacts for Building Automation 4 20 1 Input Contact J11 green 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 operates in the normal way according to the inputs coming from wireless remote controller INPUT CONTACT CONNECTOR J11 GREEN STATUS CLOSED OUTPUT CONTACT CONNECTOR J20 RED USED TO SIGNAL AN ALARM CONDITION 4 20 2 Output Contact J20 red 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 2
19. ore 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 e Ventilate the room during the installation or testing 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 ELECTRICAL DATA 8 3 1 Electric Wiring Diagrams 8 4 FUNCTION 9 4 1 System operation control 9 4 2 Cool Mode Operation 10 4 3 Heat Mode Operation 10 4 4 Auto Mode Operation only monosplit 11 4 5 Dry Mode Operation 12 4 6 Fan Mode Operation 12 4 7 Auto Fan Speed 12 4 8 Forced Made 13 4 9 Protection Operations in indoor unit 13 4 10 Protection Operation outdoor unit 14 4 11 Defrost 15 4 12 Feel Function 15 4 13 Hi Power mode 15 4 14 Night Function 16 4 15 Leds off function 16 4 16 Capacity Test Mode 16 4 17 Diagnostic 17 4 18 Indoor unit jumpers Configuration 18 4 19 Outdoor unit jumpers Configuration 18 4 20 Contacts for building automati
20. rightly in the fuseholder Measure the resistance of motor windings Is inductor Is it it n defective NO NO YES YES Y Y Y Y Replace the Replace Replace the Replace compressor outdoor unit dist outdoor unit fan PCB PCB Check for right connection of communication wires Turn off power supply and after 3 minutes turn on again 24 6 7 AIR CONDITIONER OPERATES BUT ABNORMALITIES ARE OBSERVED 1 POOR COOLING OR HEATING Check the remote Try with Does the indoor unit controller settings another 93 receive the signal NO See address remote ashy MAy De may De chapter 6 sani defective defective YES Is the remote controller Change the directly under the airflow YES position of the of the unit remote controller NO Set fan speed in s the fan motor set in YES medium or high low speed speed NO CHOC the air hter YES Clean the air filters Are they clogged NO es lee There is the connected YES possibilty of gas shortage resistance value correct NO Y Replace the expansion valve coil 25 6 7 AIR CONDITIONER OPERATES BUT ABNORMALITIES ARE OBSERVED 2 OPERATION DOES NOT SWITCH FROM HEAT TO
21. 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 7 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 6 7 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 deflect
22. the sensor equipped in the wireless remote controller icon 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 FEEL button on the remote controller In this case the FEEL icon is no longer displayed and room temperature is detected through the sensor included in the indoor unit 4 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 15 4 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 COOLING DRY 1 C HEATING 2 C 4 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 activates only in case of diagnostic signaling 4 16 Capacity Test mode This is a special operating mode used when testi
23. the supply of cold air forcing the indoor fan to a speed which cannot be changed by the user If the ICT temperature goes down 32 C in descending or does not reach 37 C in rising the speed fan is set as shown below Protection level Remote controllerset sea x LOW peseespeeseeemess passei i LLOW o 5 i z E ICT 4 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 13 4 10 Protection operations on outdoor unit 4 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 4 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 110 C 4 10 3 Compressor 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 4 10 4 Outdoor fan power mod
24. ule 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 4 10 5 Compressor power module overcurrent Operation is automatically stopped in case of current driven to each motor phase greater than a value depending on the power of the outdoor unit 9A for 12000btu and 11A for 18000btu 4 10 6 Outdoor fan power module overcurrent In case of current driven to each motor phase greater than 300mA operation is automatically stopped 14 4 11 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 controlled by cold draft prevention Defrost valve switched on open Reversing valve switched on heating operation NOTE Minimum defrost time interval is 2 minutes e During HIGH POWER operation the defrost detection is ignored until this mode remains active 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 cycle 4 12 FEEL function As standard configuration the air conditioner operates detecting the room temperature through
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