Electra EMD 27 Service Manual
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Electra EMD 27 Service Manual

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Service Manual

REFRIGERANT
R22
R407C
EMD series
Indoor Units
EMD 27
EMD 35
EMD 40
EMD 45
EMD 50
EMD 60
JULY 2005
CONTENT
Outdoor Units
OU6-27
OU8-33
Ou10-38
Ou10-44
OU10-50
OU12-60
DUCTED

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Summary of Contents for Electra EMD 27

  • Page 1: Service Manual

    Service Manual EMD series Indoor Units Outdoor Units EMD 27 OU6-27 EMD 35 OU8-33 EMD 40 OU10-38 EMD 45 OU10-44 EMD 50 OU10-50 EMD 60 OU12-60 REFRIGERANT HEAT PUMP R407C COOLING ONLY JULY 2005 CONTENT DUCTED...
  • 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 FEATURES ......................1-1 PRODUCT DATA SHEET ..................2-1 RATING CONDITIONS ..................3-1 OUTLINE DIMENSIONS ..................4-1 WIRING DIAGRAMS .....................5-1 REFRIGERATION DIAGRAMS ................6-1 CONTROL SYSTEM .....................7-1 TROUBLESHOOTING ..................8-1 EXPLODED VIEWS AND SPARE PARTS LISTS ..........9-1 Revision Y05-01 Service Manual - EMD Series DUCTED...

  • Page 4: Features

    FEATURES FEATURES MODES OF OPERATION , FUNCTIONS AND FEATURES The air conditioner is based on a microcomputer control system with remote wall mounted LCD display and control unit, programmed for the following modes and functions Cools, dehumidifies and filters the room air. Maintains desired site temperature. COOL Heats and filters the air.
  • Page 5 FEATURES VERTICAL Not Applicable in Ducted unit. AIR SWING Not Applicable in Ducted unit. DIRECTION POSITIONING Measures and displays room temperature. ROOM TEMP. Filter indicator on the indoor unit display is turned on when the filter requires FILTER cleaning. After cleaning and reinstalling the filter, the system should be reset. INDICATION A soft buzzer will sound from the indoor unit display to indicate that a BUZZER...

  • Page 6: Product Data Sheet

    PRODUCT DATA SHEET PRODUCT DATA SHEET R22/R407C Model (Indoor & Outdoor) EMD 27 & OU6-27 RC R22 Installation method Ducted Characteristics Units Cooling Heating Btu/Hr 26600 27300 Capacity Power input 2.79 3.28 Power supply V/Hz/Ph 230V/50Hz/1PH Rated current 11.6 10.0...
  • Page 7 PRODUCT DATA SHEET Model (Indoor & Outdoor) EMD 27 & OU6-27 ST R22 Installation method Ducted Characteristics Units Cooling Btu/Hr 26600 Capacity Power input 2.79 Power supply V/Hz/Ph 230V/50Hz/1PH Rated current 11.6 Starting current Circuit breaker rating Fan type & quantity Centrifugal &...
  • Page 8 PRODUCT DATA SHEET Model (Indoor & Outdoor) EMD 35 & OU8-33 RC R22 Installation method Ducted Characteristics Units Cooling Heating Btu/Hr 32500 34800 Capacity 10.1 Power input 2.87 3.53 Power supply V/Hz/Ph 230V/50Hz/1PH Rated current 14.4 12.3 Starting current Circuit breaker rating Fan type &...
  • Page 9 PRODUCT DATA SHEET Model (Indoor & Outdoor) EMD 35 & OU8-33 ST R22 Installation method Ducted Characteristics Units Cooling Btu/Hr 32500 Capacity Power input 2.87 Power supply V/Hz/Ph 230V/50Hz/1PH Rated current 14.4 Starting current Circuit breaker rating Fan type & quantity Centrifugal &...
  • Page 10 PRODUCT DATA SHEET Model (Indoor & Outdoor) EMD 35T & OU8-33T RC R22 Installation method Ducted Characteristics Units Cooling Heating Btu/Hr 31800 34100 Capacity 10.0 Power input 2.91 3.58 Power supply V/Hz/Ph 400V/50Hz/3N Rated current 3x9.1 3x8.1 Starting current Circuit breaker rating 3x16 Fan type &...
  • Page 11 PRODUCT DATA SHEET Model (Indoor & Outdoor) EMD 35T & OU8-33T ST R22 Installation method Ducted Characteristics Units Cooling Btu/Hr 31800 Capacity Power input 2.91 Power supply V/Hz/Ph 400V/50Hz/3N Rated current 3x9.1 Starting current Circuit breaker rating 3x16 Fan type & quantity Centrifugal &...
  • Page 12 PRODUCT DATA SHEET Model (Indoor & Outdoor) EMD 40 & OU10-38 RC R22 Installation method Ducted Characteristics Units Cooling Heating Btu/Hr 37700 40200 Capacity 11.0 11.6 Power input 2.82 3.32 Power supply V/Hz/Ph 230V/50Hz/1PH Rated current 17.9 15.9 Starting current 114.0 Circuit breaker rating Fan type &...
  • Page 13 PRODUCT DATA SHEET Model (Indoor & Outdoor) EMD 40 & OU10-38 ST R22 Installation method Ducted Characteristics Units Cooling Btu/Hr 37700 Capacity 11.0 Power input 2.82 Power supply V/Hz/Ph 230V/50Hz/1PH Rated current 17.9 Starting current 114.0 Circuit breaker rating Fan type & quantity Centrifugal &...
  • Page 14 PRODUCT DATA SHEET Model (Indoor & Outdoor) EMD 40T & OU10-38T RC R22 Installation method Ducted Characteristics Units Cooling Heating Btu/Hr 35800 38900 Capacity 10.5 11.3 Power input 2.95 3.35 Power supply V/Hz/Ph 400V/50Hz/3N Rated current 3x9.8 3x9.3 Starting current Circuit breaker rating 3x16 Fan type &...

  • Page 15: Ou10

    PRODUCT DATA SHEET Model (Indoor & Outdoor) EMD 40T & OU10-38T ST R22 Installation method Ducted Characteristics Units Cooling Btu/Hr 35800 Capacity 10.5 Power input 2.95 Power supply V/Hz/Ph 400V/50Hz/3N Rated current 3x9.8 Starting current Circuit breaker rating 3x16 Fan type & quantity Centrifugal &...
  • Page 16 PRODUCT DATA SHEET Model (Indoor & Outdoor) EMD 45T & OU10-44T RC R22 Installation method Ducted Characteristics Units Cooling Heating Btu/Hr 43400 45000 Capacity 12.7 13.0 Power input 2.64 3.24 Power supply V/Hz/Ph 400V/50Hz/3N Rated current 3x13.1 3x11.1 Starting current 61.8 Circuit breaker rating 3x16...
  • Page 17 PRODUCT DATA SHEET Model (Indoor & Outdoor) EMD 45T & OU10-44T ST R22 Installation method Ducted Characteristics Units Cooling Btu/Hr 43400 Capacity 12.7 Power input 2.64 Power supply V/Hz/Ph 400V/50Hz/3N Rated current 3x13.1 Starting current 61.8 Circuit breaker rating 3x16 Fan type &...
  • Page 18 PRODUCT DATA SHEET Model (Indoor & Outdoor) EMD 50T & OU10-50T RC R22 Installation method Ducted Characteristics Units Cooling Heating Btu/Hr 47500 51000 Capacity 13.9 14.9 Power input 2.74 3.30 Power supply V/Hz/Ph 400V/50Hz/3N Rated current 3x14.7 3x13.2 Starting current 65.5 Circuit breaker rating 3x16...
  • Page 19 PRODUCT DATA SHEET Model (Indoor & Outdoor) EMD 50T & OU10-50T ST R22 Installation method Ducted Characteristics Units Cooling Btu/Hr 47500 Capacity 13.9 Power input 2.74 Power supply V/Hz/Ph 400V/50Hz/3N Rated current 3x14.7 Starting current 65.5 Circuit breaker rating 3x16 Fan type &...
  • Page 20 PRODUCT DATA SHEET Model (Indoor & Outdoor) EMD 50T & OU10-50T RC R407C Installation method Ducted Characteristics Units Cooling Heating Btu/Hr 45700 51500 Capacity 13.4 15.1 Power input Power supply V/Hz/Ph 400V/50Hz/3N Rated current 3x15.0 3x15.3 Starting current Circuit breaker rating 3x16 Fan type &...
  • Page 21 PRODUCT DATA SHEET Model (Indoor & Outdoor) EMD 60T & OU12-60T RC R22 Installation method Ducted Characteristics Units Cooling Heating Btu/Hr 55000 56900 Capacity 16.1 16.5 Power input 2.74 3.16 Power supply V/Hz/Ph 400V/50Hz/3N Rated current 3x16.3 3x14.8 Starting current Circuit breaker rating 3x20 Fan type &...
  • Page 22 PRODUCT DATA SHEET Model (Indoor & Outdoor) EMD 60T & OU12-60T RC R407C Installation method Ducted Characteristics Units Cooling Heating Btu/Hr 51860 61400 Capacity 15.2 18.0 Power input 2.52 2.86 Power supply V/Hz/Ph 400V/50Hz/3N Rated current 3x16.4 3x16.8 Starting current Circuit breaker rating 3x20 Fan type &...

  • Page 23: Rating Conditions

    RATING CONDITIONS RATING CONDITIONS NOTES: 1. Rating conditions ISO/CD 13253R Cooling: indoor: 27qC (80qF) DB 19qC (66qF) WB Outdoor: 35qC (95qF) DB Heating: indoor: 20qC (68qF) DB Outdoor: 7qC (45qF) DB 6qC (43qF) WB Refrigerant tubing length (one way) 7.5m (24.6 ft) 2.

  • Page 24: Outline Dimensions

    OUTLINE DIMENSIONS OUTLINE DIMENSIONS Indoor Unit: EMD 27, 35, 40 Indoor Unit: EMD 45, 50 Indoor Unit: EMD 60 Service Manual - EMD Series Revision Y05-01 CONTENT DUCTED...
  • Page 25 OUTLINE DIMENSIONS Outdoor Unit: OU6-27 Outdoor Unit: OU8-33 Revision Y05-01 Service Manual - EMD Series CONTENT DUCTED...
  • Page 26 OUTLINE DIMENSIONS Outdoor Unit: OU10-38/45/50 Outdoor Unit: OU12-60 Service Manual - EMD Series Revision Y05-01 CONTENT DUCTED...

  • Page 27: Wiring Diagrams

    WIRING DIAGRAMS WIRING DIAGRAMS EMD 27 1PH INDOOR POWER SUPPLY INDOOR OUTDOOR Service Manual - EMD Series Revision Y05-01 CONTENT DUCTED...
  • Page 28 WIRING DIAGRAMS EMD 35 1PH OUTDOOR POWER SUPPLY INDOOR OUTDOOR Revision Y05-01 Service Manual - EMD Series CONTENT DUCTED...
  • Page 29 WIRING DIAGRAMS EMD 35 3PH OUTDOOR POWER SUPPLY INDOOR OUTDOOR Service Manual - EMD Series Revision Y05-01 CONTENT DUCTED...
  • Page 30 WIRING DIAGRAMS EMD 40 1PH OUTDOOR POWER SUPPLY INDOOR OUTDOOR Revision Y05-01 Service Manual - EMD Series CONTENT DUCTED...
  • Page 31 WIRING DIAGRAMS EMD 40, 45 3PH OUTDOOR POWER SUPPLY INDOOR OUTDOOR Service Manual - EMD Series Revision Y05-01 CONTENT DUCTED...
  • Page 32 WIRING DIAGRAMS EMD 50 3PH OUTDOOR POWER SUPPLY INDOOR OUTDOOR Revision Y05-01 Service Manual - EMD Series CONTENT DUCTED...
  • Page 33 WIRING DIAGRAMS EMD 60 3PH OUTDOOR POWER SUPPLY INDOOR OUTDOOR Service Manual - EMD Series Revision Y05-01 CONTENT DUCTED...

  • Page 34: Refrigeration Diagrams

    REFRIGERATION DIAGRAMS REFRIGERATION DIAGRAMS Model: EMD 27 RC Heat Pump Service Manual - EMD Series Revision Y05-01 CONTENT DUCTED...
  • Page 35 REFRIGERATION DIAGRAMS Model: EMD 35 RC Heat Pump Revision Y05-01 Service Manual - EMD Series CONTENT DUCTED...
  • Page 36 REFRIGERATION DIAGRAMS Models: EMD 27, 35 ST Cooling Only Service Manual - EMD Series Revision Y05-01 CONTENT DUCTED...
  • Page 37 REFRIGERATION DIAGRAMS Models: EMD 40, 45, 50, 60 RC Heat Pump Revision Y05-01 Service Manual - EMD Series CONTENT DUCTED...
  • Page 38 REFRIGERATION DIAGRAMS Model: EMD 40, 45, 50 ST Cooling Only Service Manual - EMD Series Revision Y05-01 CONTENT DUCTED...

  • Page 39: And Height Difference

    REFRIGERATION DIAGRAMS Additional Refrigerant Charge (R 22, R407C gr.) REFRIGERANT TUBING LENGTH (ONE WAY) MODEL EMD 27 EMD 35 EMD 40 1275 EMD 45 1275 EMD 50 1275 EMD 60 1700 MAXIMUM REFRIGARANT TUBING LENGTH AND HEIGHT DIFFERENCE LENGTH (m)

  • Page 40: Control System

    CONTROL SYSTEM CONTROL SYSTEM Instructions for Electronic Control Service Package INTRODUCTON The electronic control package is designated for service and is common for the following group of air-conditioners. 1. ST/RC group Cooling only / Cooling and Heating by heat pump. 2.
  • Page 41 CONTROL SYSTEM CONTROLS, MAIN P.C.B DUCTED SPLIT A.C POWE POWER CONTROLLE OLLER REV. 01 03/2004 SERIES: EMD PG. 8- Revision Y05-01 Service Manual - EMD Series CONTENT DUCTED...
  • Page 42 CONTROL SYSTEM FIG.4 ELECTRICAL ASSEMBLY – EMD FOR COMPONENTS DESCRIPTION AND CATALOG NUMBERS REFER TO SPARE PARTS LIST FOR THE RELEVANT PRODUCT NO. REV. 01 03/2004 SERIES: EMD PG. 12- 14 Service Manual - EMD Series Revision Y05-01 CONTENT DUCTED...
  • Page 43 CONTROL SYSTEM GANG BOARD DISPLAY BOARD Revision Y05-01 Service Manual - EMD Series CONTENT DUCTED...
  • Page 44 CONTROL SYSTEM CONFIGURATION OF THE APPLIANCE REMOTE CONTROL DIP SWITCH SETTING SETTING SWITCH STATUS DEFINITION SW. NO. 1 SW. NO. 2 SW. NO. 3 SW. NO.4 RC-ALL MODES OF OPERATION STD-COOL, FAN, DRY, ACTIVE HEAT-COOL, FAN, DRY, ACTIVE AUTO FAN (AF) TEMP.
  • Page 45 CONTROL SYSTEM Legend Abbreviations - Alternate Current - Air-Conditioner - ON or OFF status CLOCK - ON/OFF Operation Input, (dry contact) COMP - Compressor - Central Processing Unit -Compensation Temperature Value - Heating Element - High Pressure Control - Hardware - Indoor Condensation Pump - Indoor Coil Temperature (RT2) sensor IF, IFAN...
  • Page 46 CONTROL SYSTEM General functions for all models 2.1 COMP operation 2.1.1 For each Mode including POWER OFF & SB, a Min time delay of 3 min before COMP restarting, excluding DEICING Mode (see 7.2.1). 2.1.2 The Min operation time of COMP under different operating conditions is Min operation time of Operation Mode COMP...

  • Page 47: General Features

    CONTROL SYSTEM Thermistors operation 2.6.1 Return air Temp. is detected by RAT in normal Mode, or by RCT (R/C sensor) in I-FEEL Mode. 2.6.2 Indoor Coil Temp. is detected by ICT. 2.6.3 Outdoor Coil Temp. is detected by OCT. 2.6.4 Definition of thermistor faults: Thermistor is disconnected - The thermistor reading is below -30...

  • Page 48: Control Functions

    CONTROL SYSTEM Cooling Mode 3.1 Cooling Mode – General 3.1.1 Mode Definition MODE: COOL, AUTO (AT COOLING) TEMP: SELECTED DESIRED TEMPERATURE. FAN: HIGH, MED, LOW, AUTO. TIMER: I FEEL: ON OR OFF 3.1.2 Room Temperature, RT, is detected by RAT in normal operation, or RCT (R/C sensor) in I-FEEL mode.
  • Page 49 CONTROL SYSTEM 3.3 Sequence Diagrams 3.3.1 Maintaining room temp at desired level by comparing RT and SPT with user defined IFAN speed. (RT - SPT) [ COMP (WVL) OFAN USER FAN SPEED IFAN 7-10 Revision Y05-01 Service Manual - EMD Series CONTENT DUCTED...
  • Page 50 CONTROL SYSTEM 3.3.2 Maintaining room temp at desired level by comparing RT and SPT with AUTO-IFAN. (RT - SPT) [ COMP (WVL) OFAN IFAN Note: Refer to Sect 2.22.2 for IFAN operations in Auto-fan mode. Service Manual - EMD Series Revision Y05-01 7-11 CONTENT...
  • Page 51 CONTROL SYSTEM Heating Mode 4.1. Heating Mode - General 4.1.1. Compensation Procedure When I feel is OFF during heat mode: RT= RAT – CTV. When I feel is ON during heat mode: RT= RCT. Model WNG, WMN, RWK. MBX, PX, PRX, P2000, PXD WMF, WAX EMD/ELD ECC-K...
  • Page 52 CONTROL SYSTEM 4.1.2 Heaters operation rules for RC and SH groups (a) For both groups, Heaters versus following: T=SP-RT [ (b) Operation rules for Heaters in RC group: (i) Heaters can be enabled only if IFAN is ON. (ii) Heaters will operate according to T and the following graph: HE-1 &...
  • Page 53 CONTROL SYSTEM 4.1.5 Heaters operation rules for RH groups (a) In RH group, HE operation is according to the difference between RAT and SPT. H E2 O FF H E1 O FF T=SP-R T [ 4.1.6 OFAN Operation for RC and SH groups As a general rule for RC and SH groups, excluding protection modes, OFAN starts with the compressor.
  • Page 54 CONTROL SYSTEM 4.2. Heating, RC or SH Group Mode: Heat, Auto (at heating) Temp: Selected desired temperature Fan: HIGH, MED, LOW Timer: Any I Feel: On or Off Sequence Diagram Maintains room temp. at desired level by comparing RAT or RCT to SPT. (RT - SPT) [ COMP (WVL)
  • Page 55 CONTROL SYSTEM 4.3. Heating, RC or SH Group with Autofan Mode: Heat, Auto (at heating) Temp: Selected desired temperature Fan: Auto Timer: Any I Feel: On or Off Sequence Diagram Maintains room temp at desired level by controlling COMP, IFAN and OFAN. (RT - SPT) [ COMP (WVL)
  • Page 56 CONTROL SYSTEM 4.4. Heating, RH Group Mode: Heat, Auto (at Heating) Temp: Selected desired temperature Fan: HIGH, MED, LOW Timer: Any I Feel: On or Off Sequence Diagram Maintains room temp at desired level by controlling Heating Elements : HE1 or HE2. (RT - SPT) in H/M/L IFAN...
  • Page 57 CONTROL SYSTEM 4.5. Heating, RH Group, with Autofan Mode: Heat, Auto (at Heating) Temp: Selected desired temperature Fan: Auto Timer: Any I Feel: On or Off Sequence Diagram Maintains room temp at desired level by controlling the 2-Stage Electric Heaters. (RT - SPT) in IFAN 30 sec...
  • Page 58 CONTROL SYSTEM Automatic Cooling or Heating 5.1 Automatic Cooling or Heating - General 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. 5.1.1 Mode Definition Mode: Auto Temp: Selected desired temperature Fan:...
  • Page 59 CONTROL SYSTEM 5.2 Sequence Diagrams 5.2.1 Auto Cooling or Heating, RC or SH Groups Maintains room temp at desired level by selecting between cooling and heating modes. (RT - SPT) [ Auto Heat Mode Auto Cool Mode Auto Heat Mode >...
  • Page 60 CONTROL SYSTEM 5.2.2 Auto Cooling or Heating RH Group Maintains room temp at desired level by selecting between Cooling or Heating Modes. (RT - SPT) [ Auto Heat Mode Auto Cool Mode Auto Heat Mode COMP & OFAN > 3 min >...
  • Page 61 CONTROL SYSTEM Dry Mode 6.1 Dry, ST or RC group or P2000 model with any group settings Mode: Dry Temp: Selected desired temp Fan: Low (automatically selected by software) Timer: Any I FEEL: Any Control function Reduce room humidity with minimum temp. fluctuations by operating in Cool Mode with low speed IFAN. (RT - SPT) [ Time [min] DRY-ON...
  • Page 62 CONTROL SYSTEM 6.2. Dry, SH or RH group excluding P2000 model Mode: Dry Temp: Selected desired temp. Fan: Low (automatically selected by software) Timer: Any I FEEL: Any Control function Reduce room humidity with minimum Temp. fluctuations by operating in Cool Mode with low speed IFAN and HE. (RT - SPT) [ Time [min] IFAN...
  • Page 63 CONTROL SYSTEM Protection 7.1. Cooling Mode Protections 7.1.1. Indoor Coil Defrost Mode: Cooling, Dry, Auto Temp: Selected desired temp. Fan: Timer: Any I Feel: On or Off Control Function Protect the indoor coil from ice formation at low ambient temperature. ICT [ OFAN COMP...
  • Page 64 CONTROL SYSTEM 7.1.2. High Pressure Protection Mode: (Auto) Cooling or Dry Temp: Selected desired temp. Fan: Timer: Any I Feel: On or Off Control Function To protect the COMP from the high pressure built-up in the outdoor coil during normal cooling operation, by switching OFF the IFAN and COMP.
  • Page 65 CONTROL SYSTEM 7.2. Heating Mode Protections 7.2.1. Outdoor coil Deicing (excluding RH Group) Mode: Heating, Auto (at heating) Temp: Selected desired Temp Fan: Timer: Any I FEEL:Any Control function To protect the Outdoor coil from ice formation by controlling COMP & RV operation. 7.2.1.1.
  • Page 66 CONTROL SYSTEM 7.2.1.2. Deicing procedure OCT [ (DDT) 3 min 3 min max 12 min. COMP DI (note 1) DI (note 2) OFAN IFAN is forced to Low Speed IFAN HEs are forced ON Note 3 IFAN HEs are forced OFF OPER BLINK Notes :...
  • Page 67 CONTROL SYSTEM 7.2.2. High pressure protection (excluding RH Group) Mode: (Auto) Heating Fan: Timer: Any I Feel: On or Off Control Function Protect the Compressor from high pressure by switching OFF the OFAN and COMP. ICT [ For all models except WAX For WAX model COMP is forced OFF COMP...
  • Page 68 CONTROL SYSTEM SELF TEST for General Controller STEP 1: TURNING ON THE POWER . Turn ON the power, make sure that the unit is in operation. STEP 2 : ENABLE SELF TEST MODE 1. Use the Remote control to send the first settings to display / indoor unit Heat mode, High IFAN, set temperature 16 ºC , no I FEEL Sleep or any Timer settings needed.
  • Page 69 CONTROL SYSTEM STEP 3 :AUTO LED WALK TEST. 1) All the LEDS will turn OFF. 2) All the LEDS will turn ON for 1 second one by one in the following sequence : STAND-BY Ö OPERATE Ö TIMER Ö FILTER Ö COOL Ö HEAT. 3) In PRX all the LEDS will turn ON for 1 second one by one in the following sequence : 18 °c Ö...
  • Page 70 CONTROL SYSTEM STEP 8 : MEMORY TEST (EEPROM) The test purpose is to check if the memory is functioning correctly. The test result is reported by using the STAND-BY and FILTER LEDS: LED indicator Condition for LED to be ON STAND-BY LED Test passed FILTER LED...
  • Page 71 CONTROL SYSTEM SELF TEST DIAGRAM FOR CONTROLLER (VERSION 4V5 OR HIGHER) SHORT JUMPER Step 1 RC/ST TEST (CONTROL PCB) MODEL CONFIGURATION TEST PRESS ON Step 2 POWER BUTTON STEP MOTOR TEST FREQUENCY TEST STANDBY PRESS ON MODE Step 3 LEDS OFF BUTTON OPERATE LEDS ON TEST...
  • Page 72 CONTROL SYSTEM System diagnostics Pressing Mode button for 5-10 seconds in SB or any other operation mode will activate diagnostic mode by the acknowledgment of 3 short beeps and lighting of COOL and HEAT LEDs. In diagnostic mode, system problems will be indicated by blinking of Heat & Cool LEDs. The coding method will be as follow: Heat led will blink 5 times in 5 seconds, and then will be shut off for the next 5 seconds.

This manual is also suitable for:

Emd 40Emd 35Emd 50Emd 60Emd 45

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