Electra Delta 22 Service Manual
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Electra Delta 22 Service Manual

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Service Manual

REFRIGERANT
R410A
DC Inverter Delta Series
Indoor Units
Delta 22
Delta 25
Delta 35
Delta 50
JUNY 2005
CONTENT
Outdoor Units
DCR 22
DCR 25
DCR 35
DCR 50
HEAT PUMP
DELTA DCI

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  • Page 1: Service Manual

    Service Manual DC Inverter Delta Series Indoor Units Outdoor Units Delta 22 DCR 22 Delta 25 DCR 25 Delta 35 DCR 35 Delta 50 DCR 50 REFRIGERANT R410A HEAT PUMP JUNY 2005 CONTENT DELTA DCI...
  • 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: Introduction

    INTRODUCTION INTRODUCTION General The new Delta DC Inverter split wall mounted series comprise RC (heat pump) models, as follows: ● Delta 22 ● Delta 25 ● Delta 35 ● Delta 50 The indoor Delta units are available as LED display types only, featuring esthetic design, compact dimensions, and low noise operation.

  • Page 5: Appendix A

    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

    INTRODUCTION Tubing Connections Flare type interconnecting tubing to be produced on site. For further details please refer to the Installation Manual, Appendix A Inbox Documentation Each unit is supplied with its own installation and operation manuals, Matching Table INDOOR UNITS OUTDOOR UNITS MODEL REFR”...

  • Page 7: Rating Conditions

    PRODUCT DATA SHEET PRODUCT DATA SHEET R410A Model Indoor Unit DELTA 22 DCI Model Outdoor Unit DCR 22 R410A Flared Installation Method of Pipe Characteristics Units Cooling Heating Btu/hr 7500(4440-8870) 8530(4440-10580) Capacity 2.2(1.3-2.6) 2.5(1.3-3.1) Power input 0.66 0.73 EER (Cooling) or COP(Heating) 3.33...

  • Page 8: Product Data Sheet

    PRODUCT DATA SHEET 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 3.33 3.41 EER (Cooling) or COP(Heating) Energy efficiency class Power supply V/Ph/Hz 220-240V/Single/50Hz...
  • Page 9 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 10 PRODUCT DATA SHEET Model Indoor Unit DELTA 50 DCI Model Outdoor Unit DCR 50 R410A Installation Method of Pipe Flared Characteristics Units Cooling Heating Btu/hr 17060(4780-18770) 18080(5460-20130) Capacity 5.0(1.4-5.5) 5.3(1.6-5.9) Power input 1.56 1.55 EER (Cooling) or COP(Heating) 3.21 3.42 Energy efficiency class Power supply V/Ph/Hz...

  • Page 11: Operating Limits

    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 12: Outline Dimensions

    OUTLINE DIMENSIONS OUTLINE DIMENSIONS Indoor Unit: Delta 22, 25 DCI MOUNTING TEMPLATE TO BE USED FOR LOCATION CEILING OF INDOOR UNIT ON THE WALL INDOOR UNIT OUTLINE TUBING WALL OPENING (FOR REAR ROUTING) TUBING WALL OPENING (FOR REAR LEFT ROUTING)
  • Page 13 OUTLINE DIMENSIONS Indoor Unit: 50 DCI MOUNTING TEMPLATE TO BE USED FOR LOCATION CEILING OF INDOOR UNIT ON THE WALL INDOOR UNIT OUTLINE TUBING WALL OPENING (FOR REAR ROUTING) TUBING WALL OPENING (FOR REAR LEFT ROUTING) AIR INTAKE AIR INTAKE AIR OUTLET Outdoor Unit: DCR 22, 25, 35 DCI AI R I N TAKE...
  • Page 14 OUTLINE DIMENSIONS Outdoor Unit: DCR 50 DCI Service Manual - Delta DCI Revision Y05-01 CONTENT DELTA DCI...

  • Page 15: Performance Data & Pressure Curves

    PERFORMANCE DATA & PRESSURE CURVES PERFORMANCE DATA Delta 22 DCI 5.1.1 Cooling Capacity (kW) – Run Mode 230[V] : Indoor Fan at High Speed. ID COIL ENTERING AIR DB/WB TEMPERATURE [ OD COIL ENTERING AIR DB 22/15 24/17 27/19 29/21...
  • Page 16 PERFORMANCE DATA & PRESSURE CURVES 5.1.3 Heating Capacity (kW) - Run Mode 230[V] : Indoor Fan at High Speed. ID COIL ENTERING AIR DB TEMPERATURE [ OD COIL ENTERING AIR DB/WB DATA TEMPERATURE 1.59 1.48 1.37 -15/-16 0.44 0.48 0.53 1.77 1.66 1.55...
  • Page 17 PERFORMANCE DATA & PRESSURE CURVES Delta 25 DCI 5.2.1 Cooling Capacity (kW) – Run Mode 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 32/23 TEMPERATURE 80 - 110 % of nominal -10 - 20...
  • Page 18 PERFORMANCE DATA & PRESSURE CURVES 5.2.3 Heating Capacity (kW) - Run Mode 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 1.98 1.86 1.73...
  • Page 19 PERFORMANCE DATA & PRESSURE CURVES Delta 35 DCI 5.3.1 Cooling Capacity (kW) - Run Mode 230[V] : Indoor Fan at High Speed. ID COIL ENTERING AIR DB/WB TEMPERATURE [ OD COIL ENTERING AIR DB 22/15 24/17 27/19 29/21 32/23 DATA TEMPERATURE [ 80 - 110 % of nominal -10 - 20...
  • Page 20 PERFORMANCE DATA & PRESSURE CURVES 5.3.3 Heating Capacity (kW) - Run Mode 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 0.63 0.69 0.76 2.55 2.39 2.23...
  • Page 21 PERFORMANCE DATA & PRESSURE CURVES Delta 50 DCI 5.4.1 Cooling Capacity (kW) – Run Mode 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 32/23 TEMPERATURE 80 - 110 % of nominal -10 - 20...
  • Page 22 PERFORMANCE DATA & PRESSURE CURVES 5.4.3 Heating Capacity (kW) - Run Mode 230[V] : Indoor Fan at High Speed. ID COIL ENTERING AIR DB TEMPERATURE [ OD COIL ENTERING AIR DB/WB DATA TEMPERATURE 3.37 3.14 2.90 -15/-16 0.93 1.02 1.12 3.76 3.52 3.28...
  • Page 23 PERFORMANCE DATA & PRESSURE CURVES Capacity Correction Factor Due to Tubing Length 5.5.1 Delta 22 DCI : Cooling 1.01 1.00 0.99 0.98 0.97 0.96 0.95 0.94 0.93 Tubing Length[m ] 5.5.2 Heating 1.01 1.00 0.99 0.98 0.97 0.96 0.95 0.94 0.93...
  • Page 24 PERFORMANCE DATA & PRESSURE CURVES 5.5.3 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 ] 5.5.4 Heating 1.02 1.00 0.98 0.96 0.94 0.92 0.90 0.88 0.86 0.84 Tubing Length[m ] 5-10 Revision Y05-02 Service Manual - Delta DCI...
  • Page 25 PERFORMANCE DATA & PRESSURE CURVES 5.5.5 Delta 35 DCI : Cooling 1.01 1.00 0.99 0.98 0.97 0.96 0.95 0.94 Tubing Length[m ] 5.5.6 Heating 1.005 1.000 0.995 0.990 0.985 0.980 0.975 0.970 Tubing Length[m ] Service Manual - Delta DCI Revision Y05-02 5-11 CONTENT...
  • Page 26 PERFORMANCE DATA & PRESSURE CURVES 5.5.7 Delta 50 DCI : Cooling 1.01 1.00 0.99 0.98 0.97 0.96 0.95 0.94 Tubing Length[m ] 5.5.8 Heating 1.005 1.000 0.995 0.990 0.985 0.980 0.975 0.970 Tubing Length[m ] 5-12 Revision Y05-02 Service Manual - Delta DCI CONTENT DELTA DCI...
  • Page 27 PERFORMANCE DATA & PRESSURE CURVES Pressure Curves 5.6.1 Model: Delta 22 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 28 PERFORMANCE DATA & PRESSURE CURVES 5.6.2 Heating – Test Mode Suction Pressure VS. Outdoor Temp. 1000 15 DB 20 DB 25 DB Outdoor WB Temperature[ºC] Discharge Pressure VS. Outdoor Temp. 3500 3250 3000 2750 2500 2250 2000 15 DB 1750 20 DB 1500 25 DB...
  • Page 29 PERFORMANCE DATA & PRESSURE CURVES 5.6.3 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. Outdoor Temp. 4000 3750 3500...
  • Page 30 PERFORMANCE DATA & PRESSURE CURVES 5.6.4 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 31 PERFORMANCE DATA & PRESSURE CURVES 5.6.5 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 32 PERFORMANCE DATA & PRESSURE CURVES 5.6.6 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 33 PERFORMANCE DATA & PRESSURE CURVES 5.6.7 Model: Delta 50 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 34 PERFORMANCE DATA & PRESSURE CURVES 5.6.8 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 35: Sound Level Characteristics

    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 22 Delta 25 NC-70 NC-70 NC-60 NC-60 NC-50 NC-50...
  • Page 36 SOUND LEVEL CHARACTERISTICS Delta 35 Delta 50 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 HEARING FOR NC-20 NC-20 CONTINUOUS CONTINUOUS NOISE NOISE BAND CENTER FREQUENCIES, Hz BAND CENTER FREQUENCIES, Hz Revision Y05-02 Service Manual - Delta DCI CONTENT...

  • Page 37: Outdoor Units

    SOUND LEVEL CHARACTERISTICS Outdoor units Microphone Distance from Unit Sound Pressure Level Spectrum (Measured as Figure 5) DCR 22 Cooling DCR 22 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 HEARING FOR NC-20 NC-20...
  • Page 38 SOUND LEVEL CHARACTERISTICS DCR 35 Cooling DCR 35 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 NC-20 HEARING FOR NC-20 CONTINUOUS CONTINUOUS NOISE NOISE BAND CENTER FREQUENCIES, Hz BAND CENTER FREQUENCIES, Hz DCR 50 Cooling DCR 50 Heating NC-70...

  • Page 39: Electrical Data

    ELECTRICAL DATA ELECTRICAL DATA Single Phase Units MODEL Delta 22 Delta 25 To indoor To indoor Power Supply 1PH,220-240V,50Hz 1PH,220-240V,50Hz Max Current, A Circuit Breaker,A Power Supply 3x1.0 mm 3x1.0 mm Wiring No. X Cross Section mm Interconnecting Cable RCModel 4x1.0 mm...
  • Page 40 CONTENT DELTA DCI...
  • Page 41 CONTENT DELTA DCI...

  • Page 42: Refrigeration Diagrams

    REFRIGERATION DIAGRAMS REFRIGERATION DIAGRAMS Heat Pump Models 9.1.1 Delta 22 / DCR 22 DCI E E V E E V Service Manual - Delta DCI Revision Y05-02 CONTENT DELTA DCI...
  • Page 43 REFRIGERATION DIAGRAMS 9.1.2 Delta 25, 35 / DCR 25, 35 DCI Revision Y05-02 Service Manual - Delta DCI CONTENT DELTA DCI...
  • Page 44 REFRIGERATION DIAGRAMS 9.1.3 Delta 50 / DCR 50 DCI Service Manual - Delta DCI Revision Y05-02 CONTENT DELTA DCI...
  • Page 45 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 46: 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 47 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 48 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 49 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 50 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 51 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 52 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 53 CONTROL SYSTEM Deicing Protection Procedure Threshold COMP max. 12 minutes HEAT COOL OFAN EEVDeicerOpen T1 =60 seconds, T2 = 36 seconds, T3 = 6 seconds Revision Y05-02 Service Manual - Delta DCI 11-8 CONTENT DELTA DCI...
  • Page 54 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 55 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 56 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 57 CONTROL SYSTEM 11.11.2 Outdoor Unit Controller JP9 JUMPER LAYOUT EEPROM Data (PIN 9) ODU3 (PIN 7) ODU2 (PIN 5) ODU1 (PIN 3) ODU0 (PIN 1) (PIN 10) GND (PIN 8) (PIN 6) (PIN 4) (PIN 2) ODU MODEL SELECTION ODU3 ODU2 ODU1 ODU0...
  • Page 58 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 59 CONTROL SYSTEM 11.13.3 Outdoor Units SW Parameters Parameter Name DCR22 DCR25 DCR 35 DCR50 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...

  • Page 60: 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 61 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 62 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 63 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 64 TROUBLESHOOTING DCR50 diagnostics: Problem OCT is disconnected OCT is shorted CTT is disconnected CTT is shorted HST is disconnected (when enabled) HST is shorted (when enabled) OAT is disconnected (when enabled) OAT is shorted (when enabled) TSUC is disconnected (when enabled) TSUC is shorted (when enabled) IPM Fault Bad EEPROM...
  • Page 65 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 66 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 67: Exploded Views And Spare Parts Lists

    EXPLODED VIEWS AND SPARE PARTS LISTS EXPLODED VIEWS AND SPARE PARTS LISTS 13.1 Indoor Unit: Delta 22, 25, 35 DCI Service Manual - Delta DCI Revision Y05-02 13-1 CONTENT DELTA DCI...
  • Page 68 EXPLODED VIEWS AND SPARE PARTS LISTS 13.2 Indoor Unit: Delta 22, 25 DCI Part No. Name Quan. Version 453037000 Grill A / DELTA 22,25 453100500 Grill L axis 453100600 Grill R axis 453036500 Filter for DELTA 7/9 465720000 Silk-screen front frame for Electra...
  • Page 69 Name Quan. Version 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 70 EXPLODED VIEWS AND SPARE PARTS LISTS 13.4 Indoor Unit: Delta 50 DCI 13-4 Revision Y05-02 Service Manual - Delta DCI CONTENT DELTA DCI...
  • Page 71 EXPLODED VIEWS AND SPARE PARTS LISTS 13.5 Indoor Unit: Delta 50 DCI Part No. Name Quan. Version 465800000 Grill A Assy./Delta 50 453080800 Filter 470500003 Filter Assy. 465720020 Front Frame Assy./Delta 50 AIRWELL FOR EU 453081000 Screw Cover 462350006 Evaporator Assy. 4518662 Bearing assy fan 453082400...
  • Page 72 EXPLODED VIEWS AND SPARE PARTS LISTS 13.6 Outdoor Unit: DCR 22, 25, 35 DCI 13-6 Revision Y05-02 Service Manual - Delta DCI CONTENT DELTA DCI...
  • Page 73 EXPLODED VIEWS AND SPARE PARTS LISTS 13.7 Outdoor Unit: DCR 22 DCI Part No. Name Quan. Version 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) Compressor Assy.
  • Page 74 EXPLODED VIEWS AND SPARE PARTS LISTS 13.8 Outdoor Unit: DСR 25 DCI Part No. Name Quan. Version 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) Compressor Assy.
  • Page 75 EXPLODED VIEWS AND SPARE PARTS LISTS 13.9 Outdoor Unit: DCR 35 DCI Part No. Name Quan. Version 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 76 EXPLODED VIEWS AND SPARE PARTS LISTS 13.10 Outdoor Unit: DCR 50 DCI 13-10 Revision Y05-02 Service Manual - Delta DCI CONTENT DELTA DCI...
  • Page 77 EXPLODED VIEWS AND SPARE PARTS LISTS 13.11 Outdoor Unit: DCR 35 DCI Part No. Description Unit Front panel A 433218 Air inlet ring-420 4526340 Painting insulation plate 433223 Axial fan OD=401 4526476 DC motor for DCI 50 4526475 Motor support 433215 Base painting Assy.
  • Page 78 APPENDIX A APPENDIX A INSTALLATION AND OPERATION MANUAL ► OPERATING MANUAL DELTA 22/25/35/50 DCI ► INSTALLATION MANUAL DELTA 22/25/35/50 DCI 14-1 Service Manual - Delta DCI Revision Y05-01 CONTENT DELTA DCI...

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