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Electra DNC series Service Manual

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Service Manual

REFRIGERANT
R22
R4O7C
DNC series
Indoor Units
DNC 35 (955)
OU8-33 R22/R407C
DNC 38 (1155)
OU10-38 R22/R407C
OU10-44 R22
DNC 44 (1255)
OU10-50 R407C
JULY 2005
CONTENT
Outdoor Units
HEAT PUMP
COOLING ONLY

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Summary of Contents for Electra DNC series

  • Page 1: Service Manual

    Service Manual DNC series Indoor Units Outdoor Units DNC 35 (955) OU8-33 R22/R407C DNC 38 (1155) OU10-38 R22/R407C OU10-44 R22 DNC 44 (1255) OU10-50 R407C REFRIGERANT HEAT PUMP R4O7C COOLING ONLY JULY 2005 CONTENT...
  • Page 2 • Zero in this column indicates an original pag *Due to constant improvements please note that the data on this service manual can be modified with out notice. **Photos are not contractual. Service Manual - DNC Series Revision Y05-01 CONTENT...

  • Page 3: Table Of Contents

    PRODUCT DATA SHEET ..................2-1 RATING CONDITIONS ..................3-1 OUTLINE DIMENSIONS ..................4-1 PERFORMANCE DATA & PRESSURE CURVES ..........5-1 REFRIGERATION DIAGRAMS ................6-1 WIRING DIAGRAMS .....................7-1 CONTROL SYSTEM .....................8-1 TROUBLESHOOTING ..................9-1 10. EXPLODED VIEWS AND SPARE PARTS LISTS ..........10-1 Revision Y05-01 Service Manual - DNC Series...
  • Page 4 When in SLEEP Mode, the operation will automatically turn off after seven hours. This function saves energy when the air conditioner is operating during off hours. Service Manual - DNC Series Revision Y05-01 CONTENT...
  • Page 5 Freezes the last operation setting on the remote control. When LOCK is activated, the remote control will not be able to control the air conditioner. LOCK Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 6 LCD Remote Control Heating elements 2x750 Ducts 8”,10”,12” Others Crankcase heater 60W * Noise pressure tested at 1m distance from unit ** Noise power for ducted units measured at air outlet side Service Manual - DNC Series Revision Y05-01 CONTENT...
  • Page 7 LCD Remote Control Heating elements 2x750 Ducts 8”,10”,12” Others Crankcase heater 60W,3PH Protector * Noise pressure tested at 1m distance from unit ** Noise power for ducted units measured at air outlet side Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 8 LCD Remote Control Heating elements 2x750 Ducts 8”,10”,12” Others Crankcase heater 60W * Noise pressure tested at 1m distance from unit ** Noise power for ducted units measured at air outlet side Service Manual - DNC Series Revision Y05-01 CONTENT...

  • Page 9: Product Data Sheet

    LCD Remote Control Heating elements 2x750 Ducts 8”,10”,12” Others Crankcase heater 60W,3PH Protector * Noise pressure tested at 1m distance from unit ** Noise power for ducted units measured at air outlet side Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 10 LCD Remote Control Heating elements 2x1500 Ducts 8”,10”,12” Others Crankcase heater 33W * Noise pressure tested at 1m distance from unit ** Noise power for ducted units measured at air outlet side Service Manual - DNC Series Revision Y05-01 CONTENT...
  • Page 11 LCD Remote Control Heating elements 2x1500 Ducts 8”,10”,12” Others Crankcase heater 33W,3PH Protector * Noise pressure tested at 1m distance from unit ** Noise power for ducted units measured at air outlet side Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 12 LCD Remote Control Heating elements 2x1500 Ducts 8”,10”,12” Others Crankcase heater 33W * Noise pressure tested at 1m distance from unit ** Noise power for ducted units measured at air outlet side Service Manual - DNC Series Revision Y05-01 CONTENT...
  • Page 13 LCD Remote Control Heating elements 2x1500 Ducts 8”,10”,12” Others Crankcase heater 33W,3PH Protector * Noise pressure tested at 1m distance from unit ** Noise power for ducted units measured at air outlet side Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 14 LCD Remote Control Heating elements 2x1500 Ducts 8”,10”,12” Others Crankcase heater 60W,3PH Protector * Noise pressure tested at 1m distance from unit ** Noise power for ducted units measured at air outlet side Service Manual - DNC Series Revision Y05-01 CONTENT...
  • Page 15 LCD Remote Control Heating elements 2x1500 Ducts 8”,10”,12” Others Crankcase heater 60W,3PH Protector * Noise pressure tested at 1m distance from unit ** Noise power for ducted units measured at air outlet side 2-10 Revision Y05-01 Service Manual - DNC Series CONTENT...

  • Page 16: Rating Conditions

    21°C DB Upper limit 27°C DB 24°C DB, 18°C WB Heating Lower limit 20°C DB -9°C DB, -10°C WB 1 PH 198 – 242 V Voltage 3 PH 360 – 440 V Service Manual - DNC Series Revision Y05-01 CONTENT...

  • Page 17: Outline Dimensions

    OUTLINE DIMENSIONS OUTLINE DIMENSIONS Indoor Unit: DNC 35 (955) Indoor Unit: DNC 38 (1155), DNC 44 (1255) Service Manual - DNC Series Revision Y05-01 CONTENT...
  • Page 18 OUTLINE DIMENSIONS Outdoor Unit: OU8-33 Outdoor Unit: OU10-38, OU10-44, OU10-50 Revision Y05-01 Service Manual - DNC Series CONTENT...

  • Page 19: Performance Data & Pressure Curves

    Outdoor Te mp. (C DB) DNC 955T - R22 HEATING CAPACITY 12,000 11,000 10,000 9,000 8,000 20 C DB 7,000 18 C DB 15 C DB 6,000 Outdoor Tem p. (C DB) Service Manual - DNC Series Revision Y05-01 CONTENT...
  • Page 20 DNC 955T - R22 HEATING TOTAL INPUT 3,500 3,300 3,100 2,900 2,700 2,500 2,300 2,100 1,900 20 C DB 1,700 18 C DB 15 C DB 1,500 Outdoor Tem p. (C DB) Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 21 Outdoor Te mp. (C DB) DNC 955 - R22 COOLING DISCHARGE PRESSURE 30.0 25.0 20.0 15.0 Indoor Temp. 30 C DB/50%RH 10.0 27 C DB/50%RH 23 C DB/50%RH Outdoor Temp. (C DB) Service Manual - DNC Series Revision Y05-01 CONTENT...
  • Page 22 18 C DB 15 C DB 2.00 Outdoor Temp. (C DB) DNC 955 - R22 HEATING DISCHARGE PRESSURE Indoor Temp. 20 C DB 18 C DB 15 C DB Outdoor Temp. (C DB) Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 23 7,000 Outdoor Temp. (C DB) DNC 955T - R22 HEATING CAPACITY 12,000 11,000 10,000 9,000 8,000 20 C DB 7,000 18 C DB 15 C DB 6,000 Outdoor Tem p. (C DB) Service Manual - DNC Series Revision Y05-01 CONTENT...
  • Page 24 DNC 955T - R22 HEATING TOTAL INPUT 3,500 3,300 3,100 2,900 2,700 2,500 2,300 2,100 1,900 20 C DB 1,700 18 C DB 15 C DB 1,500 Outdoor Tem p. (C DB) Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 25 23 C DB/50%RH Outdoor Temp. (C DB) DNC 955T - R22 COOLING DISCHARGE PRESSURE 30.0 25.0 20.0 15.0 Indoor Temp. 30 C DB/50%RH 10.0 27 C DB/50%RH 23 C DB/50%RH Outdoor Temp. (C DB) Service Manual - DNC Series Revision Y05-01 CONTENT...
  • Page 26 18 C DB 15 C DB 2.00 Outdoor Temp. (C DB) DNC 955T - R22 HEATING DISCHARGE PRESSURE Indoor Temp. 20 C DB 18 C DB 15 C DB Outdoor Temp. (C DB) Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 27 Outdoor Temp. (C DB) DNC 955 - R407C HEATING CAPACITY 12,500 11,500 10,500 9,500 8,500 7,500 20 C DB 6,500 18 C DB 15 C DB 5,500 Outdoor Tem p. (C DB) Service Manual - DNC Series Revision Y05-01 CONTENT...
  • Page 28 Outdoor Temp. (C DB) DNC 955 - R407C HEATING TOTAL INPUT 4,500 4,000 3,500 3,000 2,500 2,000 20 C DB 18 C DB 15 C DB 1,500 Outdoor Tem p. (C DB) 5-10 Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 29 Outdoor Temp. (C DB) DNC 955 - R407C COOLING DISCHARGE PRESSURE 35.0 30.0 25.0 20.0 Indoor Temp. 15.0 30 C DB/50%RH 10.0 27 C DB/50%RH 23 C DB/50%RH Outdoor Temp. (C DB) Service Manual - DNC Series Revision Y05-01 5-11 CONTENT...
  • Page 30 1.50 15 C DB 1.00 Outdoor Temp. (C DB) DNC 955 - R407C HEATING DISCHARGE PRESSURE Indoor Temp. 20 C DB 18 C DB 15 C DB Outdoor Temp. (C DB) 5-12 Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 31 7,000 Outdoor Temp. (C DB) DNC 955T - R407C HEATING CAPACITY 10,500 9,500 8,500 7,500 20 C DB 6,500 18 C DB 15 C DB 5,500 Outdoor Tem p. (C DB) Service Manual - DNC Series Revision Y05-01 5-13 CONTENT...
  • Page 32 Outdoor Temp. (C DB) DNC 955T - R407C HEATING TOTAL INPUT 4,500 4,000 3,500 3,000 2,500 2,000 20 C DB 18 C DB 15 C DB 1,500 Outdoor Tem p. (C DB) 5-14 Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 33 Outdoor Temp. (C DB) DNC 955T - R407C COOLING DISCHARGE PRESSURE 30.0 25.0 20.0 15.0 Indoor Temp. 30 C DB/50%RH 10.0 27 C DB/50%RH 23 C DB/50%RH Outdoor Temp. (C DB) Service Manual - DNC Series Revision Y05-01 5-15 CONTENT...
  • Page 34 1.50 15 C DB 1.00 Outdoor Temp. (C DB) DNC 955T - R407C HEATING DISCHARGE PRESSURE Indoor Temp. 20 C DB 18 C DB 15 C DB Outdoor Temp. (C DB) 5-16 Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 35 Outdoor Temp. (C DB) DNC 1155- R22 HEATING CAPACITY 15,000 14,000 13,000 12,000 11,000 10,000 9,000 8,000 20 C DB 18 C DB 7,000 15 C DB 6,000 Outdoor Tem p. (C DB) Service Manual - DNC Series Revision Y05-01 5-17 CONTENT...
  • Page 36 Outdoor Temp. (C DB) DNC-1155-R22 HEATING TOTAL INPUT 4,500 4,000 3,500 3,000 Indoor Temp. 2,500 20 C DB 18 C DB 2,000 15 C DB 1,500 Outdoor Tem p. (C DB) 5-18 Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 37 23 C DB/50%RH Outdoor Temp. (C DB) DNC-1155-R22 COOLING DISCHARGE PRESSURE 30.0 25.0 20.0 15.0 Indoor Temp. 30 C DB/50%RH 10.0 26 C DB/50%RH 23 C DB/50%RH Outdoor Temp. (C DB) Service Manual - DNC Series Revision Y05-01 5-19 CONTENT...
  • Page 38 20 C DB 18 C DB 15 C DB Outdoor Temp. (C DB) DNC-1155-R22 HEATING DISCHARGE PRESSURE Indoor 20 C DB 18 C DB 15 C DB Outdoor Temp. (C DB) 5-20 Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 39 Outdoor Temp. (C DB) DNC 1155T - R22 HEATING CAPACITY 15,000 14,000 13,000 12,000 11,000 10,000 9,000 8,000 20 C DB 18 C DB 7,000 15 C DB 6,000 Outdoor Tem p. (C DB) Service Manual - DNC Series Revision Y05-01 5-21 CONTENT...
  • Page 40 1,500 Outdoor Temp. (C DB) DNC-1155T R22 HEATING TOTAL INPUT 4,500 4,000 3,500 3,000 2,500 20 C DB 18 C DB 2,000 15 C DB 1,500 Outdoor Tem p. (C DB) 5-22 Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 41 23 C DB/50%RH Outdoor Temp. (C DB) DNC-1155T R22 COOLING DISCHARGE PRESSURE 30.0 25.0 20.0 15.0 Indoor Temp. 30 C DB/50%RH 10.0 26 C DB/50%RH 23 C DB/50%RH Outdoor Temp. (C DB) Service Manual - DNC Series Revision Y05-01 5-23 CONTENT...
  • Page 42 20 C DB 18 C DB 15 C DB Outdoor Temp. (C DB) DNC-1155T R22 HEATING DISCHARGE PRESSURE Indoor Temp. 20 C DB 18 C DB 15 C DB Outdoor Temp. (C DB) 5-24 Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 43 Outdoor Temp. (C DB) DNC 1155- R407C HEATING CAPACITY 15,000 14,000 13,000 12,000 11,000 10,000 9,000 8,000 20 C DB 18 C DB 7,000 15 C DB 6,000 Outdoor Tem p. (C DB) Service Manual - DNC Series Revision Y05-01 5-25 CONTENT...
  • Page 44 Outdoor Temp. (C DB) DNC 1155 - R407C HEATING TOTAL INPUT 4,500 4,000 3,500 3,000 2,500 20 C DB 18 C DB 15 C DB 2,000 Outdoor Tem p. (C DB) 5-26 Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 45 23 C DB/50%RH Outdoor Temp. (C DB) DNC 1155- R407C COOLING DISCHARGE PRESSURE 30.0 25.0 20.0 15.0 Indoor Temp. 30 C DB/50%RH 10.0 27 C DB/50%RH 23 C DB/50%RH Outdoor Temp. (C DB) Service Manual - DNC Series Revision Y05-01 5-27 CONTENT...
  • Page 46 1.50 15 C DB 1.00 Outdoor Temp. (C DB) DNC 1155 - R407C HEATING DISCHARGE PRESSURE Indoor Temp. 20 C DB 18 C DB 15 C DB Outdoor Temp. (C DB) 5-28 Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 47 DNC 1155T - R407C HEATING CAPACITY 15,000 14,000 13,000 12,000 11,000 10,000 Indoor Temp. 9,000 8,000 20 C DB 18 C DB 7,000 15 C DB 6,000 Outdoor Tem p. (C DB) Service Manual - DNC Series Revision Y05-01 5-29 CONTENT...
  • Page 48 Outdoor Temp. (C DB) DNC 1155T - R407C HEATING TOTAL INPUT 4,500 4,000 3,500 3,000 2,500 20 C DB 18 C DB 15 C DB 2,000 Outdoor Tem p. (C DB) 5-30 Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 49 Outdoor Temp. (C DB) DNC 1155T - R407C COOLING DISCHARGE PRESSURE 30.0 25.0 20.0 15.0 Indoor Temp. 30 C DB/50%RH 10.0 27 C DB/50%RH 23 C DB/50%RH Outdoor Temp. (C DB) Service Manual - DNC Series Revision Y05-01 5-31 CONTENT...
  • Page 50 1.50 15 C DB 1.00 Outdoor Temp. (C DB) DNC 1155T - R407C HEATING DISCHARGE PRESSURE Indoor Temp. 20 C DB 18 C DB 15 C DB Outdoor Temp. (C DB) 5-32 Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 51 Outdoor Temp. (C DB) DNC-1255 HEATING CAPACITY 18,000 17,000 16,000 15,000 14,000 13,000 12,000 11,000 20 C DB 10,000 18 C DB 15 C DB 9,000 8,000 Outdoor Tem p. (C DB) Service Manual - DNC Series Revision Y05-01 5-33 CONTENT...
  • Page 52 23 C DB/50%RH 1,500 Outdoor Temp. (C DB) DNC-1255 HEATING TOTAL INPUT 4,500 4,000 3,500 3,000 2,500 20 C DB 18 C DB 2,000 15 C DB 1,500 Outdoor Tem p. (C DB) 5-34 Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 53 Outdoor Temp. (C DB) DNC-1255 COOLING DISCHARGE PRESSURE 25.0 23.0 21.0 19.0 17.0 15.0 13.0 Indoor Temp. 11.0 30 C DB/50%RH 26 C DB/50%RH 23 C DB/50%RH Outdoor Temp. (C DB) Service Manual - DNC Series Revision Y05-01 5-35 CONTENT...
  • Page 54 20 C DB 18 C DB 15 C DB Outdoor Temp. (C DB) DNC-1255 HEATING DISCHARGE PRESSURE Indoor Temp. 20 C DB 18 C DB 15 C DB Outdoor Temp. (C DB) 5-36 Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 55 Outdoor Temp. (C DB) DNC 1255- R407C HEATING CAPACITY 20,000 18,000 16,000 14,000 12,000 10,000 20 C DB 8,000 18 C DB 15 C DB 6,000 Outdoor Tem p. (C DB) Service Manual - DNC Series Revision Y05-01 5-37 CONTENT...
  • Page 56 Outdoor Temp. (C DB) DNC 1255 - R407C HEATING TOTAL INPUT 6,000 5,500 5,000 4,500 4,000 20 C DB 18 C DB 15 C DB 3,500 Outdoor Tem p. (C DB) 5-38 Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 57 23 C DB/50%RH Outdoor Temp. (C DB) DNC 1255- R407C COOLING DISCHARGE PRESSURE 30.0 25.0 20.0 15.0 Indoor Temp. 30 C DB/50%RH 10.0 27 C DB/50%RH 23 C DB/50%RH Outdoor Temp. (C DB) Service Manual - DNC Series Revision Y05-01 5-39 CONTENT...
  • Page 58 1.50 15 C DB 1.00 Outdoor Temp. (C DB) DNC 1255 - R407C HEATING DISCHARGE PRESSURE Indoor Temp. 20 C DB 18 C DB 15 C DB Outdoor Temp. (C DB) 5-40 Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 59 M ax.System Resi stance Point for Performance test 80.00 Curve’s colors according to fan motor wires colors 60.00 40.00 20.00 0.00 1000 1250 1500 1750 2000 2250 2500 Air Flow Ra te, m^3/hr Service Manual - DNC Series Revision Y05-01 5-41 CONTENT...

  • Page 60: Refrigeration Diagrams

    REFRIGERATION DIAGRAMS REFRIGERATION DIAGRAMS Heat Pump Models 6.1.1 DNC 35 R22/R407C Service Manual - DNC Series Revision Y05-01 CONTENT...
  • Page 61 REFRIGERATION DIAGRAMS Heat Pump Models 6.2.1 DNC 38, 44 R22/R407C Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 62 REFRIGERATION DIAGRAMS 6.3.1 ADDITIONAL REFRIGERANT CHARGE (R22) Service Manual - DNC Series Revision Y05-01 CONTENT...

  • Page 63: Wiring Diagrams

    WIRING DIAGRAMS WIRING DIAGRAMS Model: DNC 35 1PH 7.1.1 Indoor Unit 7.1.2 Outdoor Unit Service Manual - DNC Series Revision Y05-01 CONTENT...
  • Page 64 WIRING DIAGRAMS Model: DNC 35 3PH7 7.2.1 Indoor Unit 7.2.2 Outdoor Unit Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 65 WIRING DIAGRAMS Model: DNC 38 1PH 7.3.1 Indoor Unit 7.3.2 Outdoor Unit: Service Manual - DNC Series Revision Y05-01 CONTENT...
  • Page 66 WIRING DIAGRAMS Model: DNC 38 3PH 7.4.1 Indoor Unit 7.4.2 Outdoor Unit: OU8-30 3PH Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 67 WIRING DIAGRAMS Model: DNC 44 3PH 7.5.1 Indoor Unit 7.5.2 Outdoor Unit Service Manual - DNC Series Revision Y05-01 CONTENT...

  • Page 68: Control System

    MODEL PLUG SETTINGS Before installation, make sure to set the model plug to conform with the suitable group. GROUP J6 Setting J2 Setting ST / RC open open closed open closed closed Service Manual - DNC Series Revision Y05-01 CONTENT...
  • Page 69 CONTROL SYSTEM POWER CONTROLLER Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 70 CONTROL SYSTEM DISPLAY BOARD Service Manual - DNC Series Revision Y05-01 CONTENT...
  • Page 71 SW3 - SELECTION OF TEMP. DISPLAY °C or °F IN RC3 OR SWING FUNCTION IN RC4. SW4 - SELECTION OF TIME DISPLAY 12H AM/PM or 24H IN RC3 0R ILLUMINATION FUNCTION IN RC4. OFF = 0 ON =1 NOTE: After setting the dip switches perform reset operation.. Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 72 - Set Point Temperature - Standard (a Model with Cooling Only) - Software TEMP - Temperature - Without ∆T - The difference between SPT and RT. ∆T in Heat Mode: SPT-RT ∆T Cool/Dry/Fan Mode: RT-SPT Service Manual - DNC Series Revision Y05-01 CONTENT...
  • Page 73 IFAN relay and will minimize the change in IFAN speed: IFAN speed 2.4. OFAN operation 2.4.1 Min time interval between OFAN ON/OFF state change is 30 sec. Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 74 (1) the deicing is completed, and (2) COMP has been restarted and operated for 30 sec. ii. When all the following conditions are fulfilled: 4.7K Ohm resistor is connected on the OCT IFAN is OFF Compressor is ON Service Manual - DNC Series Revision Y05-01 CONTENT...

  • Page 75: Features

    Mode: Cool, Auto (at Cooling) Temp: Selected desired temperature. Fan: HIGH, MED, LOW Timer: Any I Feel: On or Off Control function Maintains room temp at desired level by comparing RT and SPT. Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 76 Mode: Cool, Auto (at cooling) Temp: Selected desired temperature Fan: Auto Timer: Any I Feel: On or Off Control function Maintains room temp at desired level and controls the IFAN speed for optimal comfort. Service Manual - DNC Series Revision Y05-01 CONTENT...
  • Page 77 CONTROL SYSTEM (RT - SPT) [ COMP (WVL) OFAN IFAN Note: Refer to Sect 2.3 for IFAN operations in Autofan mode. 8-10 Revision Y05-01 Service Manual - DNC Series CONTENT...

  • Page 78: Heating Mode

    SH group. (Cf.: Sect 4.0.4.e) 4) If the IFAN is turned ON by the IFTC operation, its minimum operation time before stopping due to low ICT temperature is 60 sec. Service Manual - DNC Series Revision Y05-01 8-11 CONTENT...
  • Page 79 Back-up Mode. Both HE & IFAN will work in Back-up Mode until the ICT reaches 35 c. Then, the operation goes on in the usual mode (IFAN as in 4.0.3.a, and HE as in 4.0.4.d). 8-12 Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 80 Maintains room temp. at desired level by comparing RAT or RCT to SPT. (RT - SPT) [ COMP (WVL) H/M/L IFAN Note 1 Note 2 Note : Refer to Sect 4.0.3.b for IFAN operations when COMP is OFF. Service Manual - DNC Series Revision Y05-01 8-13 CONTENT...
  • Page 81 Timer: Any I Feel: On or Off Control function Maintains room temp at desired level by controlling COMP, IFAN and OFAN. (RT - SPT) [ COMP (WVL) IFAN Note 1 Note 2 8-14 Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 82 Temp: Selected desired temperature Fan: HIGH, MED, LOW Timer: Any I Feel: On or Off Control Function Maintains room temp. at desired level by controlling Heating Elements : HE1 or HE2. Service Manual - DNC Series Revision Y05-01 8-15 CONTENT...
  • Page 83 Refer to Sect 4.0.3.c for IFAN operations. 4.4. Heating, RH Group, with Autofan Mode: Heat, Auto (at Heating) Temp: Selected desired temperature Fan: Auto Timer: Any I Feel: On or Off Control function 8-16 Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 84 The Auto Mode is for model with compressor and the WVL-RH only. The WVL-ST, RC and SH units do not work in Auto Mode. 5.0.1 Switching-temperature between Cooling and Heating is SPT ± Service Manual - DNC Series Revision Y05-01 8-17...
  • Page 85 Auto Cooling or Heating, RC or SH Groups Mode: Auto Temp: Selected desired temperature Fan: Timer: Any I Feel: On or Off Control function Maintains room temp at desired level by selecting between cooling and heating modes. 8-18 Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 86 Because of the low ICT, IFAN is turned OFF while changing from Auto Cool to Auto Heat mode. (Cf.: Sect 4.0.3). In addition, HEs will not operate until IFAN is ON (Cf.: Sect 4.0.4). Service Manual - DNC Series Revision Y05-01 8-19 CONTENT...
  • Page 87 > 3 min > 3 min H/M/L IFAN 30 sec Notes: Refer to Sect. 4.0.3.c for the details of IFAN operation. Refer to Sect 5.0.5 for the minimum mode-change delay from COMP/HEs OFF. 8-20 Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 88 3 min Min COMP-On time) after every 15 min of continuous COMP OFF time. 3. When Dry is changed from ON to OFF or vice versa, the limits mentioned in (1) & (2) are ignored. The COMP operation is Service Manual - DNC Series Revision Y05-01 8-21 CONTENT...
  • Page 89 Cool Mode with low speed IFAN and HE. (RT - SPT) [ Time [min] IFAN COMP & OFAN Notes : 1) HP and Defrost protections are the same as in Cool Mode. 8-22 Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 90 = COMP and OFAN stop for 10 min minimum Notes: 1. When J7 is closed (connected), OFAN cycling is cancelled and the set temperature for COMP & OFAN cut-out and cut-in are Service Manual - DNC Series Revision Y05-01 8-23 CONTENT...
  • Page 91 For WAX & P2000 models COMP is forced OFF COMP COMP is forced OFF OFAN follow operation of OFAN OFAN is forced ON OFAN is forced ON COMP IFAN forced IFAN to LOW OPER Blink 8-24 Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 92 Mode: Heating, Auto (at heating) Temp: Selected desired Temp Fan: Timer: Any I FEEL: Control function Protects the Outdoor coil from ice formation by controlling COMP & RV operation. 7.2.1.2 Deicing procedure Service Manual - DNC Series Revision Y05-01 8-25 CONTENT...
  • Page 93 For WAX, the IFAN is simply forced OFF. 4. For SH group, HEs are forced ON and IFAN is forced to operate in Low speed, regardless of the ICT and difference between RAT & SPT. 8-26 Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 94 OCT is under 70 c. The OPER LED will not blink in this case. 7.5. Condensation Pump (DNC model only) Mode: Cool, Dry, Auto Temp: Selected desired temperature Fan: Service Manual - DNC Series Revision Y05-01 8-27 CONTENT...
  • Page 95 3. The "Over Flow" & “Normal” condition are indicated by logic “1” & “0” at the LEVEL4 input pin respectively. 4. The “Overflow” condition can activate the water pump in SB and operating modes. 8-28 Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 96 FILTER will indicate the model configuration as follows: MODEL COMP OPERATE LED TIMER LED FILTER LED WMN1 EMD/LS ECC-K / DNC WMN 4 WMN 2/WHX WMN 3 In this term the step motor will turn to HOME POSITION. Service Manual - DNC Series Revision Y05-01 8-29 CONTENT...
  • Page 97 0 sec - STAND-BY is turn ON 3 sec - STAND-BY ,OPER , TIMER and FILTER are turn ON When the timing reset test is completed, the next test will start automatically. 8-30 Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 98 In order to terminate self-test mode the User can change the unit setting from "Cool Mode, Low FAN" to " Cool Mode, Med FAN" or to wait without using the Remote control for 60 sec. Service Manual - DNC Series Revision Y05-01...
  • Page 99 In order to terminate self-test mode the User can change the unit setting from "Cool Mode, Low FAN" to " Cool Mode, Med FAN" or to wait without using the Remote control for 60 sec. 8-32 Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 100 (TWO BEEPS SOUNDS) MEDIUM PRESS ON MODE THERMISTOR ANALOG Step 6 HIGH BUTTON VOLTAGE CHECKING PRESS ON MODE EEPROM MEMORY Step 7 BUTTON TEST DISCONNECT END OF SELF Step 8 JUMPER TEST Service Manual - DNC Series Revision Y05-01 8-33 CONTENT...
  • Page 101 2. A/C will jump out to normal mode if sending a command by the R/C in the system diagnostics mode. If this command from the R/C contain a Group ID, this ID will become the new Group ID of the ELCON unit. 8-34 Revision Y05-01 Service Manual - DNC Series CONTENT...

  • Page 102: Troubleshooting

    No cooling or heating Outdoor fan motor faulty or -Replace P.C.B. only indoor fan works. other fault caused, compressor overload - Outdoor fan blocked remove protection cut out. obstructions. Service Manual - DNC Series Revision Y05-01 CONTENT...
  • Page 103 - Outdoor temperature is too - Shut unit off, outdoor temp. is below low (below -2°C) design conditions and cannot function properly. -Outdoor unit air outlet is blocked. -Remove obstructions. Revision Y05-01 Service Manual - DNC Series CONTENT...

  • Page 104: Exploded Views And Spare Parts Lists

    EXPLODED VIEWS AND SPARE PARTS LISTS EXPLODED VIEWS AND SPARE PARTS LISTS 10.1 Indoor Unit: DNC 35, 38, 44 Service Manual - DNC Series Revision Y05-01 10-1 CONTENT...
  • Page 105 Remote control RC RC3 SP000000102 Coil assembly 433318 Coil support 433306 433316 Bracket 433322 Adapter 12" 433335 Adapter 12" cover 433321 Adapter 10" 433386 Manual damper 433416 Motor 433314 Air connector 10-2 Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 106 Remote control RC RC3 SP000000100 Coil assembly 433318 Coil support 433306 433316 Bracket 433322 Adapter 12" 433335 Adapter 12" cover 433321 Adapter 10" 433430 Manual damper 433417 Motor 433314 Air connector Service Manual - DNC Series Revision Y05-01 10-3 CONTENT...
  • Page 107 Remote control RC RC3 SP000000101 Coil assembly 433318 Coil support 433306 433316 Bracket 433322 Adapter 12" 433335 Adapter 12" cover 433321 Adapter 10" 433386 Manual damper 433417 Motor 433314 Air connector 10-4 Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 108 EXPLODED VIEWS AND SPARE PARTS LISTS 10.5 Outdoor Unit: OU8-33, OU8-33T Service Manual - DNC Series Revision Y05-01 10-5 CONTENT...
  • Page 109 EXPLODED VIEWS AND SPARE PARTS LISTS 10.6 Outdoor Unit: OU8-33, OU8-33T 10-6 Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 110 THERMISTOR+CAP WTH CONNECTOR L1050 442001 CAPACITOR 400V 60mF 442457 VALVE COIL SANHUA MOLEX 402012 SUCTION ACCUMULATOR 3*5/8 3.5Lb 439656 SIDE COVER OU10 430376 COMPRESSOR WIRING WTH PLUG+CONNECTOR 190441 HEATER CRANKCASE OU8 LG Service Manual - DNC Series Revision Y05-01 10-7 CONTENT...
  • Page 111 442457 VALVE COIL SANHUA MOLEX 402012 SUCTION ACCUMULATOR 3*5/8 3.5Lb 439656 SIDE COVER OU10 439795 BOARD 3PH PROTECTOR 435545 COMPRESSOR WIRING WTH PLUG L1200 3PH LG 190441 HEATER CRANKCASE OU8 LG 10-8 Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 112 THERMISTOR+CAP WTH CONNECTOR L1050 442001 CAPACITOR 400V 60mF 442457 VALVE COIL SANHUA MOLEX 402012 SUCTION ACCUMULATOR 3*5/8 3.5Lb 439656 SIDE COVER OU10 430376 COMPRESSOR WIRING WTH PLUG+CONNECTOR 190441 HEATER CRANKCASE OU8 LG Service Manual - DNC Series Revision Y05-01 10-9 CONTENT...
  • Page 113 442457 VALVE COIL SANHUA MOLEX 402012 SUCTION ACCUMULATOR 3*5/8 3.5Lb 439656 SIDE COVER OU10 439795 BOARD 3PH PROTECTOR 435545 COMPRESSOR WIRING WTH PLUG L1200 3PH LG 190441 HEATER CRANKCASE OU8 LG 10-10 Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 114 EXPLODED VIEWS AND SPARE PARTS LISTS 10.11 Outdoor Unit: OU10-38, OU10-50 Service Manual - DNC Series Revision Y05-01 10-11 CONTENT...
  • Page 115 EXPLODED VIEWS AND SPARE PARTS LISTS 10.12 Outdoor Unit: OU10-38, OU10-50 10-12 Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 116 442462 VALVE COIL L700 4-WAY MOLEX 435875 COMPRESSOR WIRING WTH PLUG L1100 439661 CONES OU10 402189 SUCTION ACCUMULATOR 5" x 3/4" 7Lb 436352 RAISING HANDLE OU10 190441 HEATER CRANKCASE OU8 LG Service Manual - DNC Series Revision Y05-01 10-13 CONTENT...
  • Page 117 VALVE COIL L700 4-WAY MOLEX 435967 COMPRESSOR WIRING WTH PLUG L1100 3 439661 CONES OU10 402189 SUCTION ACCUMULATOR 5" x 3/4" 7Lb 439795 BOARD 3PH PROTECTOR 436352 RAISING HANDLE OU10 190441 HEATER CRANKCASE OU8 LG 10-14 Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 118 442462 VALVE COIL L700 4-WAY MOLEX 435875 COMPRESSOR WIRING WTH PLUG L1100 439661 CONES OU10 402189 SUCTION ACCUMULATOR 5" x 3/4" 7Lb 436352 RAISING HANDLE OU10 190441 HEATER CRANKCASE OU8 LG Service Manual - DNC Series Revision Y05-01 10-15 CONTENT...
  • Page 119 VALVE COIL L700 4-WAY MOLEX 435967 COMPRESSOR WIRING WTH PLUG L1100 3 439661 CONES OU10 402189 SUCTION ACCUMULATOR 5" x 3/4" 7Lb 439795 BOARD 3PH PROTECTOR 436352 RAISING HANDLE OU10 190441 HEATER CRANKCASE OU8 LG 10-16 Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 120 THERMISTOR+CAP WTH CONNECTOR L1050 442001 CAPACITOR 400V 60mF 435875 COMPRESSOR WIRING WTH PLUG L1100 439661 CONES OU10 402189 SUCTION ACCUMULATOR 5" x 3/4" 7Lb 436352 RAISING HANDLE OU10 190441 HEATER CRANKCASE OU8 LG Service Manual - DNC Series Revision Y05-01 10-17 CONTENT...
  • Page 121 THERMISTOR+CAP WTH CONNECTOR L1050 435967 COMPRESSOR WIRING WTH PLUG L1100 3 439661 CONES OU10 402189 SUCTION ACCUMULATOR 5" x 3/4" 7Lb 439795 BOARD 3PH PROTECTOR 436352 RAISING HANDLE OU10 190441 HEATER CRANKCASE OU8 LG 10-18 Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 122 COMPRESSOR WIRING WTH PLUG L1200 3PH LG 439661 CONES OU10 402189 SUCTION ACCUMULATOR 5" x 3/4" 7Lb 439795 BOARD 3PH PROTECTOR 436352 RAISING HANDLE OU10 402741 THERMISTOR WTH CONNECTOR L1250 190442 HEATER CRANKCASE OU10 LG Service Manual - DNC Series Revision Y05-01 10-19 CONTENT...
  • Page 123 COMPRESSOR WIRING WTH PLUG L1200 3PH LG 439661 CONES OU10 402189 SUCTION ACCUMULATOR 5" x 3/4" 7Lb 439795 BOARD 3PH PROTECTOR 436352 RAISING HANDLE OU10 402741 THERMISTOR WTH CONNECTOR L1250 190442 HEATER CRANKCASE OU10 LG 10-20 Revision Y05-01 Service Manual - DNC Series CONTENT...
  • Page 124 COMPRESSOR WIRING WTH PLUG L1200 3PH LG 439661 CONES OU10 402189 SUCTION ACCUMULATOR 5" x 3/4" 7Lb 439795 BOARD 3PH PROTECTOR 436352 RAISING HANDLE OU10 402741 THERMISTOR WTH CONNECTOR L1250 190442 HEATER CRANKCASE OU10 LG Service Manual - DNC Series Revision Y05-01 10-21 CONTENT...
  • Page 125 CENTRAL AIR CONDITIONER SPLIT SYSTEM WITH ELECTRONIC CONTROL SERIES DNC INSTALLATION INSTRUCTIONS CONTENT...
  • Page 126 INSTALLATION MANUAL Table of Contents 1. List of accessories provided with the air-conditioner ..............1 2. General ............................2 2.1 Indoor unit dimensions DNC - all types ..................3 2.2 Outdoor unit dimensions DNC 955, DNC 955 3PH ..............4 2.3 Outdoor unit dimensions: DNC 1155, DNC 1255 ...............

  • Page 127: List Of Accessories Provided With The Air-Conditioner

    INSTALLATION MANUAL List of accessories provided with the air-conditioner Description Amount Name Technician’s installation Installation instructions manual Instruction manual for Operation instructions for remote remote control control Instruction manual for the Operation instructions user Remote control including Operating the air-conditioner batteries Remote control bracket Hanging the remote control on the...

  • Page 128: General

    INSTALLATION MANUAL General Only a professional technician, who went through an appropriate training by the company, may install the air-conditioner. Installation must comply with the Company’s specs, according to the law of electricity, while using the Company’s standard components such as tubes, ducts, electric power cables and other necessary accessories.

  • Page 129: Indoor Unit Dimensions Dnc - All Types

    INSTALLATION MANUAL Indoor unit dimensions DNC - all types 1. Suction tube connector (flared) 2. Liquid tube connector (flared) 3. Pump outlet ∅ 16 mm 4. Drain pool plug (for servicing purposes only) 5. 8” air supply opening 6. Hanging bracket 7.

  • Page 130: Outdoor Unit Dimensions Dnc 955, Dnc 955 3Ph

    INSTALLATION MANUAL Outdoor unit dimensions DNC 955, DNC 955 3PH 1. Wiring connections 2. Suction tube connector (flared) 3. Liquid tube connector (flared) 4. Service valve 5. Air inlet 6. Air outlet Fig. 2. General dimensions of DNC 955 outdoor unit English 4 CONTENT...

  • Page 131: Outdoor Unit Dimensions Dnc 1155, Dnc 1255

    INSTALLATION MANUAL Outdoor unit dimensions DNC 1155, DNC 1255 1. Wiring connections 2. Suction tube connector (flared) 3. Liquid tube connector (flared) 4. Service valves 5. Service taps 6. Air inlet 7. Air outlet Fig. 3. General dimensions of DNC 1155, DNC 1255 outdoor units English 5 CONTENT...

  • Page 132: Considerations For Choosing Installation Location

    INSTALLATION MANUAL Considerations for choosing installation location Relative positioning between units The outdoor unit must be installed as close as possible to the indoor unit, in order not to harm capacity. For determining the maximal distance allowed between them, see table No. 1 in paragraph 7.2.

  • Page 133: Considerations In Selecting Location For Installing The Indoor Unit

    INSTALLATION MANUAL Considerations in selecting location for installing the indoor unit • Enable maximal air dispersion, to the largest possible distance, within space that must be air - conditioned. • Enable free passage for the return air. • Ensure appropriate drainage of condensing water, which may be created within the unit. •...

  • Page 134: Installation Of The Indoor Unit

    INSTALLATION MANUAL Installation of the indoor unit There are two typical indoor unit installations: Installing the unit with DNC return air panel, and lowering the ceiling to the unit’s height. 1. Lowered ceiling 2. Return air panel frame 3. Filter access panel Fig.

  • Page 135: Hanging The Indoor Unit

    INSTALLATION MANUAL Hanging the indoor unit There are two options to hang the indoor unit: By means of a mounting plate. By means of mounting brackets. 4.1.1. Hanging the indoor unit by means of a mounting plate Select the location for the indoor unit while adhering to the instructions provided in paragraph 3.3.
  • Page 136 INSTALLATION MANUAL Fig. 7. Preparing gas tubing while using the mounting plate 4.1.2. Hanging the indoor unit by means of mounting brackets Select location for the indoor unit while adhering to instructions provided in paragraph 3.3. Select location for the unit’s mounting brackets. Mark the position of the hanging rods.

  • Page 137: Installing Dnc Return Air Panel

    INSTALLATION MANUAL Installing DNC return air panel Carefully remove the entire return air panel from the packing. Dismantle the filter access panel by pressing the two buttons in a circular motion and releasing the hanging wires (see Fig. 9). Connect the frame to the unit using four screws and washers. After lowering the ceiling, the return air panel can be straightened according to ceiling lines or walls by releasing screws, moving frame and tightening the screws.

  • Page 138: Fresh Air Supply (Optional)

    INSTALLATION MANUAL Fresh air supply (optional) Using a knife cut an opening in the plastic air inlet (see Fig. 10). Using a knife cut open the insulation in the fresh air opening connection (see Fig. 11). Install special adapter and tighten it with four screws. Fresh air adapter can be purchased through Company service centers.

  • Page 139: Connecting The Drainage Tube

    INSTALLATION MANUAL Connecting the drainage tube It is recommended to prepare a drainage point with hard PVC ∅ 32 mm tube by a professional plumber, close to the indoor unit. To enable proper drainage of the condensation water, the passage of the drainage must be planned in advance with a down slope of at least 1%, without creating any bottleneck and without upwards bends (see Fig.

  • Page 140: Installation Of Flexible Ducts

    INSTALLATION MANUAL Installation of flexible ducts The air-conditioner indoor unit has eight 8” air supply openings - 4 supply openings in each direction. Do not open more than a total of 6 openings. The amount of openings is intended for maximum flexibility of installation when in one side of the unit there are four rooms.
  • Page 141 INSTALLATION MANUAL Fig. 15. Installing the manual damper English 15 CONTENT...

  • Page 142: Installation Of The Outdoor Unit

    INSTALLATION MANUAL Installation of the outdoor unit The outdoor unit must be installed on a raised and leveled concrete slab, or on a metal rack, with a height above ground of 100 mm. Note: Make sure slotted rubber pads are installed under the outdoor unit supports, otherwise vibrations might occur, and might be transmitted, with noise, into the building.

  • Page 143: Installation Of Interconnecting Tubing Between Indoor And Outdoor Units

    INSTALLATION MANUAL Installation of interconnecting tubing between indoor and outdoor units General For routing the interconnecting tubing between the indoor and the outdoor units, prepare passage for a 60 mm PVC tube (see Fig. 18). Make sure the following: • The passage tube must have a 10 degrees slant towards the outside, to prevent water from penetrating into the building.

  • Page 144: Relative Positioning Of The Indoor And Outdoor Units

    INSTALLATION MANUAL Table 1. Recommended diameter for the connecting tubes (outer diameter in inches) Model Line Length of Tubes up to (meter) Maximal Type Height Difference DNC 955 Suction 5/8” 5/8” 3/4” 3/4” 3/4” Liquid 3/8” 3/8” 3/8” 3/8” 3/8” DNC 1155 Suction 3/4”...
  • Page 145 INSTALLATION MANUAL 1. Suction tube 2. Oil trap every 5 m 3. Liquid tube 4. Indoor unit 5. Outdoor unit Fig. 19. Outdoor unit installed above the indoor unit Fig. 20. The radius of curve in oil trap 1. Outdoor unit 2.

  • Page 146: Insulating The Gas Tubes

    INSTALLATION MANUAL Insulating the gas tubes Insulate each tube separately, using 6 mm thick insulation for the 3/8”-5/8“ diameter tubes, and 9 mm thick insulation for the 3/4“ tubes. Wrap the refrigerant tubes and wiring cables with a white PVC tape (ultraviolet protected).

  • Page 147: Preparing The Air-Conditioner For Operation

    INSTALLATION MANUAL Table 2. Setting the height "A" of the tube protrusion (outer tube diameter in inches) A (mm) Outer tube diameter (inch) 3/8“ 1/2” 5/8” 3/4“ Preparing the air-conditioner for operation The advanced steps to prepare the air-conditioner for operation are critical in guaranteeing the appropriate operation of the air-conditioner for a long time;...
  • Page 148 INSTALLATION MANUAL Close the two service taps of the manifold, on suction side and on the compression side, and stop the operation of the vacuum pump. Make sure that at this stage the pressure gage remains stationary and stable, and does not change its reading for the next 5 minutes.

  • Page 149: Tightening Nuts

    INSTALLATION MANUAL Tightening nuts Warning: While opening or closing gas taps, as described in the following steps, you must not expose your face to the service openings and / or any other openings when you try to insert the Allen key;...

  • Page 150: Electrical And Tubes Installation

    INSTALLATION MANUAL Electrical and tubes installation Make sure that the electrical cable connecting between the indoor and the outdoor units is of the NYY type (triple insulation). Make sure and check that the cable is continuous and contains grounding wires. The electrical connection to the outdoor unit will be made by means of a quick connector provided with the unit.

  • Page 151: 1Ph Units

    INSTALLATION MANUAL 1PH units Customer is required to provide an appropriate main power supply, which must include: • A time-delayed, C type, single-phase automatic circuit breaker, to be installed at the beginning of the main supply line, on the main connection panel. The capacity of the automatic circuit breaker can be determined according to the nameplate.

  • Page 152: Remote Control

    INSTALLATION MANUAL 1. Outdoor unit 2. Terminal block 3. Connecting cable between units 4. Indoor unit 5. Control display 6. Wireless remote control 7. Wired remote control (optional) 8. Power supply 9. Two - wire control cable 10. Safety switch in outdoor unit, water protected (installed by an electrician)
  • Page 153 INSTALLATION MANUAL Testing the indoor unit - All remote control commands are received in the air-conditioner control panel. - The lights on the control panel operate correctly. - The air-conditioner performs all commands of the remote control. Testing the outdoor unit - There is no exceptional noise or vibrations during the air-conditioner operation.

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