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Electra DCR 25 Service Manual

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Service Manual

REFRIGERANT
R410A
DC Inverter Delta Series
Indoor Units
Delta 25
Delta 35
MARCH 2005
Outdoor Units
DCR 25
DCR 35
HEAT PUMP

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Summary of Contents for Electra DCR 25

  • Page 1: Service Manual

    Service Manual DC Inverter Delta Series Indoor Units Outdoor Units Delta 25 DCR 25 Delta 35 DCR 35 REFRIGERANT R410A HEAT PUMP MARCH 2005...
  • Page 2 LIST OF EFFECTIVE PAGES LIST OF EFFECTIVE PAGES Note: Changes in the pages are indicated by a “Revision#” in the footer of each effected page (when none indicates no changes in the relevant page). All pages in the following list represent effected/ non effected pages divided by chapters.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS Table of Contents INTRODUCTION ....................1-1 PRODUCT DATA SHEET ..................2-1 RATING CONDITIONS ..................3-1 OUTLINE DIMENSIONS ..................4-1 PERFORMANCE DATA & PRESSURE CURVES ..........5-1 SOUND LEVEL CHARACTERISTICS ..............6-1 ELECTRICAL DATA ....................7-1 WIRING DIAGRAMS .....................8-1 REFRIGERATION DIAGRAMS ................9-1 10. TUBING CONNECTIONS ..................10-1 11.

  • Page 4: Main Features

    INTRODUCTION INTRODUCTION General The new Delta DC Inverter split wall mounted series comprise RC (heat pump) models, as follows: ● Delta 25 ● Delta 35 The indoor Delta units are available as LED display types only, featuring esthetic design, compact dimensions, and low noise operation. Main Features The Delta series benefits from the most advanced technological innovations, namely: ●...

  • Page 5: Indoor Unit

    INTRODUCTION Indoor Unit The indoor unit is wall mounted, and can be easily fitted to many types of residential and commercials applications. It includes: ● Casing with air inlet and outlet grills. ● A large-diameter tangential fan. ● Bended coil with treated aluminum fins. ●...

  • Page 6: Tubing Connections

    Inbox Documentation Each unit is supplied with its own installation and operation manuals, Matching Table INDOOR UNITS OUTDOOR UNITS MODEL REFR” Delta 25 Delta 35 DCR 25 R410A √ DCR 35 R410A √ Service Manual - Delta DCI Revision Y05-01 CONTENT...
  • Page 7 PRODUCT DATA SHEET PRODUCT DATA SHEET R410A Model Indoor Unit DELTA 25 Model Outdoor Unit DCR 25 Installation Method of Pipe Flared Characteristics Units Cooling Heating Btu/hr 8530(4440-10240) 9550(4774-11940) Capacity 2.5(1.3-3.0) 2.8(1.4-3.5) 0.75 0.82 Power input 3.38 3.41 EER (Cooling) or COP(Heating) Energy efficiency class...
  • Page 8 PRODUCT DATA SHEET Model Indoor Unit DELTA 35 Model Outdoor Unit DCR 35 Installation Method of Pipe Flared Characteristics Units Cooling Heating Btu/hr 11940(4440-13990) 12280(5115-13990) Capacity 3.5(1.3-4.1) 3.6(1.65-4.1) 1.03 1.05 Power input 3.39 3.43 EER (Cooling) or COP(Heating) Energy efficiency class Power supply V/Ph/Hz 220-240V/Single/50Hz...

  • Page 9: Rating Conditions

    RATING CONDITIONS RATING CONDITIONS Rating conditions in accordance with ISO 5151 and ISO 13253 (for ducted units). Cooling: Indoor: C DB 19 C WB Outdoor: 35 C DB Heating: Indoor: C DB Outdoor: 7 C DB 6 C WB Operating Limits 3.1.1 R410A Indoor...

  • Page 10: Outline Dimensions

    OUTLINE DIMENSIONS OUTLINE DIMENSIONS Indoor Unit: Delta 25 DCI Indoor Unit: Delta 35 DCI Service Manual - Delta DCI Revision Y05-01 CONTENT...
  • Page 11 OUTLINE DIMENSIONS Outdoor Unit: DCR 25/35 DCI AI R I N TAKE AI R O U TLET Revision Y05-01 Service Manual - Delta DCI CONTENT...

  • Page 12: Performance Data

    PERFORMANCE DATA & PRESSURE CURVES PERFORMANCE DATA Delta 25 DCI 5.1.1 Cooling Capacity (kW) - Run Mode (Unit A or B) 230[V] : Indoor Fan at High Speed. ID COIL ENTERING AIR DB/WB TEMPERATURE [ OD COIL ENTERING AIR DB DATA 22/15 24/17...
  • Page 13 PERFORMANCE DATA & PRESSURE CURVES 5.1.3 Heating Capacity (kW) - Run Mode(Unit A or B) 230[V] : Indoor Fan at High Speed. ID COIL ENTERING AIR DB TEMPERATURE [ OD COIL ENTERING AIR DB/WB DATA TEMPERATURE 1.78 1.66 1.53 -15/-16 0.49 0.54 0.59...
  • Page 14 PERFORMANCE DATA & PRESSURE CURVES Delta 35 DCI 5.2.1 Cooling Capacity (kW) - Run Mode (Unit A or B) 230[V] : Indoor Fan at High Speed. ID COIL ENTERING AIR DB/WB TEMPERATURE [ OD COIL ENTERING AIR DB DATA 22/15 24/17 27/19 29/21...

  • Page 15: Delta

    PERFORMANCE DATA & PRESSURE CURVES 5.2.3 Heating Capacity (kW) - Run Mode(Unit A or B) 230[V] : Indoor Fan at High Speed. ID COIL ENTERING AIR DB TEMPERATURE [ OD COIL ENTERING AIR DB/WB DATA TEMPERATURE 2.29 2.13 1.97 -15/-16 0.61 0.67 0.73...
  • Page 16 PERFORMANCE DATA & PRESSURE CURVES Capacity Correction Factor Due to Tnbing Length 5.3.1 Delta 25 DCI: Cooling 1.01 1.00 0.99 0.98 0.97 0.96 0.95 0.94 0.93 0.92 0.91 0.90 Tubing Length [m] 5.3.2 Heating 1.02 1.00 0.98 0.96 0.94 0.92 0.90 0.88 0.86...
  • Page 17 PERFORMANCE DATA & PRESSURE CURVES 5.3.3 Delta 35 DCI: Cooling 1.01 1.00 0.99 0.98 0.97 0.96 0.95 0.94 Tubing Length [m] 5.3.4 Heating 1.01 1.00 1.00 0.99 0.99 0.98 0.98 0.97 Tubing Length [m] Revision Y05-01 Service Manual - Delta DCI CONTENT...
  • Page 18 PERFORMANCE DATA & PRESSURE CURVES Pressure Curves 5.4.1. Model: Delta 25 DCI Cooling — Test Mode Suction Pressure VS.Outdoor Temp. 1100 1000 22/15 DB /WB 24/17 DB /WB 27/19 DB /WB 29/21 DB /WB 32/23 DB /WB Outdoor DB Temperature [ºC] Discharge Pressure VS.
  • Page 19 PERFORMANCE DATA & PRESSURE CURVES 5.4.2 Heating — Test Mode. Suction Pressure VS. Outdoor Temp. 1000 15 DB 20 DB 25 DB Outdoor WB Temperature [ºC] Discharge Pressure VS. Outdoor Temp. 4000 3750 3500 3250 3000 2750 2500 2250 15 DB 2000 20 DB 1750...
  • Page 20 PERFORMANCE DATA & PRESSURE CURVES Model: Delta 35 DCI Cooling — Test Mode Suction Pressure VS. Outdoor Temp. 1200 1100 1000 22/15 DB /WB 24/17 DB /WB 27/19 DB /WB 29/21 DB /WB 32/23 DB /WB Outdoor DB Temperature [ºC] Discharge Pressure VS.
  • Page 21 PERFORMANCE DATA & PRESSURE CURVES Heating — Test Mode Suction Pressure VS. Outdoor Temp. 1000 15 DB 20 DB 25 DB Outdoor WB Temperature [ºC] Discharge Pressure VS. Outdoor Temp. 4000 3750 3500 3250 3000 2750 2500 2250 15 DB 2000 20 DB 1750...
  • Page 22 SOUND LEVEL CHARACTERISTICS SOUND LEVEL CHARACTERISTICS Sound Pressure Level Figure 1. Wall Mounted Figure 2. Floor Mounted Figure 3. Ducted Figure 4. Cassette Soud Pressure Level Spectrum (Measured as Figure 1) Delta 25 Delta 35 NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40...
  • Page 23 SOUND LEVEL CHARACTERISTICS Outdoor units Microphone Distance from Unit Sound Pressure Level Spectrum (Measured as Figure 5) DCR 25 Cooling DCR 25 Heating NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 APPROXIMATE APPROXIMATE THRESHOLD OF THRESHOLD OF HEARING FOR...

  • Page 24: Electrical Data

    ELECTRICAL DATA ELECTRICAL DATA Single Phase Units MODEL Delta 25 Delta 35 To indoor To indoor Power Supply 1PH,220-240V,50Hz 1PH,220-240V,50Hz Max Current, A Circuit Breaker,A Power Supply Wiring No. X 3x1.0 mm 3x1.5 mm Cross Section mm Interconnecting Cable RC 4x1.0 mm 5x1.5 mm Model No.

  • Page 25: Delta

    WIRING DIAGRAMS WIRING DIAGRAMS Delta 25/35 DCR 25/35 DCI Service Manual - Delta DCI Revision Y05-01 CONTENT...

  • Page 26: Refrigeration Diagrams

    REFRIGERATION DIAGRAMS REFRIGERATION DIAGRAMS Heat Pump Models 9.1.1 Delta 25/35 DCR 25/35 DCI => Cooling Mode Service Manual - Delta DCI Revision Y05-01 CONTENT...

  • Page 27: Tubing Connections

    TUBING CONNECTIONS TUBING CONNECTIONS TUBE (Inch) ¼” ⅜” ½” ⅝” ¾” TORQUE (Nm) Flare Nuts 11-13 40-45 60-65 70-75 80-85 Valve Cap 13-20 13-20 18-25 18-25 40-50 Service Port Cap 11-13 11-13 11-13 11-13 11-13 Valve Protection Cap-end Refrigerant Valve Port (use Allen wrench to open/close) Valve Protection Cap Refrigerant Valve Service Port Cap...

  • Page 28: Control System

    CONTROL SYSTEM CONTROL SYSTEM 11.1 General Functions and Operating Rules The DCI software is fully parametric.All the model dependent parameters are shown in Blue color and with Italic style [parameter]. The parameters values are given in the last section of this control logic chapter of the service manual.
  • Page 29 CONTROL SYSTEM Target frequency limits as a function of outdoor air temperature (OAT): OAT Range Cool mode limits Heat mode limits OAT < 6 No limit 6 ≤ OAT < 15 MaxFreqAsOATC MaxFreqAsOAT1H 15 ≤ OAT < 28 MaxFreqAsOAT2H 28 ≤ OAT No limit 11.1.4 Frequency Changes Control...
  • Page 30 CONTROL SYSTEM 11.1.9 Heating Element Control Heating element can be started if LOAD > 0.8 * MaximumNLOAD AND Indoor Coil temperature < 45. The heating element will be stopped when LOAD < 0.5 * MaximumNLOAD OR if Indoor Coil temperature > 50. 11.1.10 Outdoor Fan Control •...
  • Page 31 CONTROL SYSTEM 11.1.1 EEV (electronic Expansion valve) Control EEV opening is defined as EEV = EEV + EEV is the initial EEV opening as a function of the compressor frequency, operation mode, unit model and capacity. is a correction value for the EEV opening that is based on the compressor temperature. During the first 5 minutes of compressor operation EEV = 0.
  • Page 32 CONTROL SYSTEM 11.4.2 Indoor Fan Control in Heat Mode Indoor fan speed depends on the indoor coil temperature: ICTST ICTVL ICTL ICTH ICTT 11.5 Auto Cool/Heat Mode When in auto cool heat mode unit will automatically select between cool and heat mode according to the difference between actual room temperature and user set point temperature (ΔT).
  • Page 33 CONTROL SYSTEM 11.7.2 Indoor Coil over Heating Protection ICT Trend Fast Fast Decreasing No Change Increasing Decreasing Increasing ICT > 55 53 < ICT ≤ 55 49 < ICT ≤ 53 47 < ICT ≤ 49 45 < ICT ≤ 47 Norm Norm 43 <...
  • Page 34 CONTROL SYSTEM 11.7.4 Compressor over Current Protection Stop-Compresor CCROC4 HzDown2 CCROC3 HzDown1 CCROC2 Stop-Rise CCROC1 Normal 11.7.5 Heat Sink Over Heating Protection (NA for DCI 25 and 35) HST Trend Decreasing No Change Increasing HST > 90 85 < HST ≤ 90 82 <...
  • Page 35 CONTROL SYSTEM Deicing Protection Procedure Threshold COMP max. 12 minutes HEAT COOL OFAN EEVDeicerOpen T1 =60 seconds, T2 = 36 seconds, T3 = 6 seconds Revision Y05-01 Service Manual - Delta DCI 11-8 CONTENT...
  • Page 36 CONTROL SYSTEM 11.8 Operating the Unit from the Mode Button Forced operation allows to start, stop and operate in Cooling or Heating, in pre-set temperature according to the following table: Forced operation Mode Pre-set Temperature Cooling Heating 11.9 On Unit Controls and Indicators The following is schematic drawing for the display: STBY/OPER Timer...
  • Page 37 CONTROL SYSTEM 1. Lights up when the Air Conditioner is connected to power and the mode is STBY. STAND BY 2. Blinks for 3 seconds, when the system is switched to Heat Mode INDICATOR by using the Mode/Reset Switch on the unit (the operation indicator will be off during this blinking time).
  • Page 38 CONTROL SYSTEM 11.10 Outdoor Unit Controller Indicators Unit has three LED’s. SB LED, STATUS LED, FAULT LED. SB LED is ON when power is ON (230 VAC), STATUS LED is ON when COMP is ON, and Blinks according to diagnostics mode definitions when either fault or protection occurs.
  • Page 39 ODU0 ODU Model Reserved ON (PIN1 & PIN2) A (Single DCR 20) ON (PIN3 & PIN4) B (Single DCR 25) ON (PIN3 & PIN4) ON (PIN1 & PIN2) C (Single DCR 35) ON (PIN5 & PIN6) ON (PIN5 & PIN6) ON (PIN1 &...
  • Page 40 CONTROL SYSTEM 11.13 SW Parameters 11.13.1 Indoor Units SW Parameters General Parameters for All Models: Parameters defining the indoor fan speed as a function of Indoor Coil temperature in heat mode (ICT): ICTST Speed ICT to stop indoor fan ICTVLSpeed ICT to go down to very low speed ICTLSpeed ICT to start in very low speed...
  • Page 41 CONTROL SYSTEM 11.13.2 Outdoor Units SW Parameters Parameter Name DCI25 DCI35 DCI 50 Compressor Parameters MinFreqC MaxFreqC MinFreqH MaxFreqH Step1Freq Step2Freq Step3Freq Frequency limits as a function of outdoor air temperature MaxFreqAsOATC MaxFreqAsOAT1H MaxFreqAsOAT2H Compressor Over Heating Protection CTTOH1 CTTOH2 CTTOH3 CTTOH4 CTTOH5...

  • Page 42: Troubleshooting

    TROUBLESHOOTING TROUBLESHOOTING WARNING!!! When Power Up – the whole outdoor unit controller, including the wiring, is under HIGH VOLTAGE!!! Never open the Outdoor unit before turning off the Power!!! When turned off, the system is still charged (400V)!!! It takes about 4 Min. to discharge the system. Touching the controller before discharging may cause an electrical shock!!! Single Split system failures and corrective 12.1...
  • Page 43 TROUBLESHOOTING SYMPTOM PROBABLE CAUSE CORRECTIVE ACTION Unit works in wrong Check RV power connections, if OK, mode (cool instead of Electronics or power Check RV operation with direct heat or heat instead of connection to RV 230VAC power supply, if OK, cool) Replace outdoor controller.
  • Page 44 TROUBLESHOOTING 12.3 Judgment by Indoor/Outdoor Unit Diagnostics Enter diagnostics mode - press for five seconds Mode/Reset button in any operation mode. Acknowledgment is by 3 short beeps and lights of all Display LED’s. Then, The units will enter into Indoor and Outdoor unit diagnostic modes.
  • Page 45 TROUBLESHOOTING 12.3.2 Indoor unit diagnosis and corrective actions Fault Probable Cause Corrective Action Check sensor connections or Sensor failures of all replace sensor types Indoor and Outdoor controllers are Replace Indoor controller Communication with different versions mismatch Communication or grounding wiring is Check Indoor to Outdoor wiring No Communication not good.
  • Page 46 TROUBLESHOOTING 12.3.4 Outdoor unit diagnosis and corrective actions Fault Probable Cause Corrective Action Sensors failures of all Check sensors connections types or replace sensors. Electronics HW Check all wiring and jumper IPM Fault problem settings, if OK, replace electronics. No action, unless special Bad EEPROM parameters are required for unit operation.
  • Page 47 TROUBLESHOOTING 12.5.2 Checking Power Input If Indoor unit power LED is unlighted, power down the system and check the fuse of the Indoor unit. If the fuse is OK replace the Indoor unit controller. If the fuse has blown, replace the fuse and power up again. Checking Power Input procedure for the Outdoor unit is the same as with the Indoor unit.

  • Page 48: Exploded Views And Spare Parts Lists

    EXPLODED VIEWS AND SPARE PARTS LISTS EXPLODED VIEWS AND SPARE PARTS LISTS 13.1 Indoor Unit: Delta 25/35 DCI Service Manual - Delta DCI Revision Y05-01 13-1 CONTENT...
  • Page 49 GRILL A / DELTA 20,25 453100500 GRILL L AXIS 453100600 GRILL R AXIS 453036500 FILTER FOR DELTA 7/9 465720000 SILK-SCREEN FRONT FRAME FOR ELECTRA 4525987 SCREW COVER 453070701 EVAP. SYSTEM ASSY./DELTA 20,25 4523526 BERAING ASSY FAN 4523523 FAN ASSY PLASTIC 452784400 IOD-7,9 AIR OUTLET ASSY.
  • Page 50 Part No. Name 453036800 GRILL A / DELTA 12 453100500 GRILL L AXIS 453100600 GRILL R AXIS 453082900 FILTER FOR DELTA 12 465720001 SILK-SCREEN FRONT FRAME FOR ELECTRA 4525987 SCREW COVER 453058201 EVAP. SYSTEM ASSY./DELTA 35 4523526 BERAING ASSY FAN...
  • Page 51 EXPLODED VIEWS AND SPARE PARTS LISTS 13.4 Outdoor Unit: DCR 25/35 DCI 13-4 Revision Y05-01 Service Manual - Delta DCI CONTENT...
  • Page 52 EXPLODED VIEWS AND SPARE PARTS LISTS 13.5 Outdoor Unit: DCR 25 DCI Part No. Name 4522551 GRILLE A OF GCN 4523441 FRONT PANEL A PAINTING ASSY 4519251 AXIAL FAN OD=400 453238900 SENSOR/OAT 4526775 COMPRESSOR TOP THERMISTOR(CTT) 4526776 OUTDOOR COIL THERMISTOR(OCT) 453170100 COMPRESSOR ASSY.
  • Page 53 EXPLODED VIEWS AND SPARE PARTS LISTS 13.6 Outdoor Unit: DСR 35 DCI Part No. Name 4522551 GRILLE A OF GCN 4523441 FRONT PANEL A PAINTING ASSY 4519251 AXIAL FAN OD=400 453238900 SENSOR/OAT 4526775 COMPRESSOR TOP THERMISTOR(CTT) 4526776 OUTDOOR COIL THERMISTOR(OCT) 4526204 COMPRESSOR ASSY.

  • Page 54: Appendix A

    APPENDIX A APPENDIX A INSTALLATION AND OPERATION MANUAL ► INSTALLATION & OPERATING MANUAL DELTA 25/35 DCI 14-1 Service Manual - Delta DCI Revision Y05-01 CONTENT...
  • Page 55 ENGLISH AIR CONDITIONER SPLIT WALL MOUNTED FRAN AIS FRAN AIS CLMATISEUR SPLIT MURAL DEUTSCH KLIMAGERAET IN SPLIT BAUWEISE CLIMATIZADOR SPLIT MURAL ESPA OL ESPA OL ITALIANO CONDIZIONATORE D'ARIA APARETE SPLIT RETAIL P R O G R A M M I N G A N D O P E R A T I N G M A N U A L M A N U E L D ' U T I L I S A T I O N D E P R O G R A M M A T I O N B E D I E N U N G S U N D P R O G R A M M I E R U N G S H A N D B U C H M A N U A L D E U T I L I Z A C I O N Y D E P R O G R A M M A C I O N...
  • Page 56 AIR CONDITIONER SPLIT WALL MOUNTED PROGRAMMING AND OPERATING CONTENT APPENDIX A...
  • Page 57 CONTENTS INTRODUCTION SYSTEM DESCRIPTION MODES OF OPERATION, FUNCTIONS AND FEATURES ON-UNIT INDICATORS AND CONTROLS PLEASE READ THESE INSTRUCTIONS BEFORE PROTECTION MODES OPERATING THE AIR CONDITIONER CARE AND MAINTENANCE OPERATING TIPS PRECAUTIONS BEFORE CALLING FOR SERVICE CONTENT APPENDIX A...

  • Page 58: Introduction

    INTRODUCTION Dear customer: The DC Inverter air conditioner you have purchased is one of advanced units of its kind. The DC Inverter air conditioner is a variable capacity air OPERATING TEMPERATURE RANGE: conditioner which uses high efficiency DC motor for the compressor. Unlike other models, it can adjust its capacity according to the user setting and the environmental condition, thus saving up to 30% of the seasonal power consumption, while keeping maximum comfort level.

  • Page 59: System Description

    SYSTEM DESCRIPTION 1. Air intake grill 2. Air filter 3. Supply air flap (louver) 4. Horizontal Air flow Deflecting lovers 5. Air outlet 6. Unit's indicator and on unit control O F F 7. Power cord I FEEL AUTO MODE S E T HOUR SLEEP...

  • Page 60: Modes Of Operation, Functions And Features

    MODES OF OPERATION, FUNCTIONS AND FEATURES Cools, dehumidifies and filters the room air. Maintains desired room COOL temperature. Heats and filters the room air. Maintains desired room temperature. HEATING Automatically choose COOLING or HEATING or DRY, AUTO maintaining the desired temperature according to the room conditions. Dehumidifies and softly cools the room In DRY Mode, the air conditioner operates at an increased dehumidifying power.
  • Page 61 The air flap (louver) is automatically positioned for the most suitable blow-out angle, when COOL, HEAT, DRY or FAN modes are selected. When the air AUTO FLAP conditioner is turned off, the flap will close automatically for an aesthetic appearance. Automatic swing of supply air in vertical direction.

  • Page 62: On-Unit Indicators And Controls

    ON-UNIT INDICATORS AND CONTROLS STAND-BY AND OPERATION INDICATOR Light up for red when unit is power but not operated. Light up for Green when unit is operating. MODE BUTTON AND RESET BUTTON As long as the filter indicator is off, the Mode/Reset button functions as Mode switch, once filter indication is on, the Mode/Reset button functions as Reset switch.

  • Page 63: Protection Modes

    PROTECTION MODES Your air-conditioner includes several auto protection modes which enables you to use it virtually at any time and in any season regardless of the outdoor temperature. Some of the protection modes are listed below: Mode Operation Protection Controlled conditions from remedy...

  • Page 64: Care And Maintenance

    CARE AND MAINTENANCE Before performing any maintenance procedure, make sure to disconnect the air conditioner from the power. CLEANING THE AIR FILTER Your air conditioner is provided with a filter cleaning indicator. When the indicator (D)lights up, the filters should be removed for cleaning. To remove the air filters, lift up the panel, push the air filters up slightly to unlock them, pull out the filters.

  • Page 65: Operating Tips

    OPERATING TIPS Set a suitable room temperature; excessively low room temperature is not good for your health and wastes electricity. Avoid frequent setting of the temperature. During cooling, avoid direct sun. Keep curtains and blinds closed. Close doors and windows to keep the cool air in the room. Avoid generating heat or using of heating appliances while the air conditioner in cooling mode.

  • Page 66: Precautions

    PRECAUTIONS Use the proper electrical fuse. Do not pull out the power cord unless the unit is turned off. Do not start or stop operation by disconnecting the power cord. Do not obstruct or block the air inlet or air outlet of the air conditioner. Do not insert any objects in the air outlet of the indoor or outdoor units.

  • Page 67: Before Calling For Service

    BEFORE CALLING FOR SERVICE Before calling for service, please check the following common malfunctions and correct as needed. Problem Cause Remedy Unit does not Unit does not connected to Plug in the power operate. Stand- power cord by indicator does Power failure Check main fuse not light up...
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This manual is also suitable for:

Delta 25Dcr 35Delta 35

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