Daikin K-Series Service Manual

Daikin K-Series Service Manual

Floor standing
Table of Contents

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Warning
Daikin products are manufactured for export to numerous countries throughout the world. Prior to
purchase, please confirm with your local authorised importer, distributor and/or retailer whether this
product conforms to the applicable standards, and is suitable for use, in the region where the product
will be used. This statement does not purport to exclude, restrict or modify the application of any local
legislation.
Ask a qualified installer or contractor to install this product. Do not try to install the product yourself.
Improper installation can result in water or refrigerant leakage, electrical shock, fire or explosion.
Use only those parts and accessories supplied or specified by Daikin. Ask a qualified installer or
contractor to install those parts and accessories. Use of unauthorised parts and accessories or
improper installation of parts and accessories can result in water or refrigerant leakage, electrical
shock, fire or explosion.
Read the User's Manual carefully before using this product. The User's Manual provides important
safety instructions and warnings. Be sure to follow these instructions and warnings.
If you have any enquiries, please contact your local importer, distributor and/or retailer.
Cautions on product corrosion
1. Air conditioners should not be installed in areas where corrosive gases, such as acid gas or alkaline gas, are produced.
2. If the outdoor unit is to be installed close to the sea shore, direct exposure to the sea breeze should be avoided. If you need to install
the outdoor unit close to the sea shore, contact your local distributor.
Organization:
DAIKIN INDUSTRIES, LTD.
AIR CONDITIONING MANUFACTURING DIVISION
Scope of Registration:
THE DESIGN/DEVELOPMENT AND MANUFACTURE OF
COMMERCIAL AIR CONDITIONING, HEATING, COOLING,
REFRIGERATING EQUIPMENT, COMMERCIAL HEATING
EQUIPMENT, RESIDENTIAL AIR CONDITIONING
EQUIPMENT, HEAT RECLAIM VENTILATION, AIR
JMI-0107
JQA-1452
CLEANING EQUIPMENT, MARINE TYPE CONTAINER
REFRIGERATION UNITS, COMPRESSORS AND VALVES.
Dealer
Specifications, designs and other content appearing in this brochure are current as of April 2011 but subject to change without notice.
Organization:
DAIKIN INDUSTRIES
(THAILAND) LTD.
All of the Daikin Group's business
facilities and subsidiaries in Japan
Scope of Registration:
are certified under the ISO 14001
THE DESIGN/DEVELOPMENT
international standard for
AND MANUFACTURE OF AIR
environment management.
CONDITIONERS AND THE
COMPONENTS INCLUDING
COMPRESSORS USED FOR THEM
Head Office:
Umeda Center Bldg., 2-4-12, Nakazaki-Nishi,
Kita-ku, Osaka, 530-8323 Japan
Tokyo Office:
JR Shinagawa East Bldg., 2-18-1, Konan,
Minato-ku, Tokyo, 108-0075 Japan
http://www.daikin.com/global_ac/
c
All rights reserved
SiBE061121
Printed in Japan 04/2011 B AK
Service
Manual
Inverter Pair
Floor Standing Type K-Series
[Applied Models]
G
Inverter Pair : Heat Pump
SiBE061121
Draft

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Table of Contents
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Summary of Contents for Daikin K-Series

  • Page 1 Improper installation can result in water or refrigerant leakage, electrical shock, fire or explosion. Use only those parts and accessories supplied or specified by Daikin. Ask a qualified installer or contractor to install those parts and accessories. Use of unauthorised parts and accessories or improper installation of parts and accessories can result in water or refrigerant leakage, electrical shock, fire or explosion.
  • Page 2 SiBE061121.book Page i Friday, April 22, 2011 4:12 PM SiBE061121 Inverter Pair Floor Standing Type K-Series Heat Pump Indoor Unit FVXG25K2V1B FVXG35K2V1B FVXG50K2V1B Outdoor Unit RXG25K2V1B RXG35K2V1B RXG50K2V1B Table of Contents...
  • Page 3: Table Of Contents

    SiBE061121.book Page ii Friday, April 22, 2011 4:12 PM SiBE061121 1. Introduction .....................v 1.1 Safety Cautions ..................v 1.2 Used Icons ....................ix Part 1 List of Functions ..............1 1. Functions....................2 Part 2 Specifications ..............3 1. Specifications ..................4 Part 3 Printed Circuit Board Connector Wiring Diagram ..... 6 1.
  • Page 4 SiBE061121.book Page iii Friday, April 22, 2011 4:12 PM SiBE061121 2.1 Names of Parts..................46 2.2 Preparation before Operation..............50 2.3 AUTO · DRY · COOL · HEAT · FAN Operation ........52 2.4 RADIANT Operation................53 2.5 Temperature Setting................54 2.6 Adjusting the Airflow Direction and Rate ..........55 2.7 POWERFUL Operation ................57 2.8 OUTDOOR UNIT QUIET Operation............58 2.9 ECONO Operation .................59...
  • Page 5 SiBE061121.book Page iv Friday, April 22, 2011 4:12 PM SiBE061121 5.2 Fan Motor Connector Check ..............120 5.3 Power Supply Waveforms Check............120 5.4 Electronic Expansion Valve Coil Check ..........121 5.5 Four Way Valve Performance Check ...........122 5.6 Inverter Unit Refrigerant System Check..........122 5.7 “Inverter Checker”...
  • Page 6: Introduction

    SiBE061121.book Page v Friday, April 22, 2011 4:12 PM Introduction SiBE061121 1. Introduction Safety Cautions Cautions and Be sure to read the following safety cautions before conducting repair work. The caution items are classified into “ Warning” and “ Caution”. The “ Warning”...
  • Page 7 SiBE061121.book Page vi Friday, April 22, 2011 4:12 PM SiBE061121 Introduction Warning Be sure to wear a safety helmet, gloves, and a safety belt when working at a high place (more than 2 m). Insufficient safety measures may cause a fall accident.
  • Page 8 SiBE061121.book Page vii Friday, April 22, 2011 4:12 PM Introduction SiBE061121 1.1.2 Cautions Regarding Safety of Users Warning Be sure to use parts listed in the service parts list of the applicable model and appropriate tools to conduct repair work. Never attempt to modify the equipment.
  • Page 9 SiBE061121.book Page viii Friday, April 22, 2011 4:12 PM SiBE061121 Introduction Warning Check to make sure that the power cable plug is not dirty or loose, then insert the plug into a power outlet securely. If the plug has dust or loose connection, it may cause an electrical shock or fire. Be sure to install the product correctly by using the provided standard For unitary type installation frame.
  • Page 10: Used Icons

    SiBE061121.book Page ix Friday, April 22, 2011 4:12 PM Introduction SiBE061121 Caution Be sure to measure the insulation resistance after the repair, and make sure that the resistance is 1 MΩ or higher. Faulty insulation may cause an electrical shock. Be sure to check the drainage of the indoor unit after the repair.
  • Page 11: Part 1 List Of Functions

    SiBE061121.book Page 1 Friday, April 22, 2011 4:12 PM SiBE061121 Part 1 List of Functions 1. Functions....................2 List of Functions...
  • Page 12: Functions

    SiBE061121.book Page 2 Friday, April 22, 2011 4:12 PM Functions SiBE061121 1. Functions Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air-Purifying Filter — — Function Clean Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — —...
  • Page 13: Part 2 Specifications

    SiBE061121.book Page 3 Friday, April 22, 2011 4:12 PM SiBE061121 Part 2 Specifications 1. Specifications ..................4 Specifications...
  • Page 14: Specifications

    SiBE061121.book Page 4 Friday, April 22, 2011 4:12 PM Specifications SiBE061121 1. Specifications 50 Hz, 220 - 230 - 240 V Indoor Unit FVXG25K2V1B FVXG35K2V1B Model RXG25K2V1B RXG35K2V1B Outdoor Unit Cooling Heating Cooling Heating 2.5 (1.3 ~ 3.0) 3.4 (1.3 ~ 4.5) 3.5 (1.4 ~ 3.8) 4.5 (1.4 ~ 5.0) Capacity Rated (Min.
  • Page 15 SiBE061121.book Page 5 Friday, April 22, 2011 4:12 PM SiBE061121 Specifications 50 Hz, 220 - 230 - 240 V Indoor Unit FVXG50K2V1B Model RXG50K2V1B Outdoor Unit Cooling Heating 5.0 (1.7 ~ 5.6) 5.8 (1.7 ~ 8.1) Capacity Rated (Min. ~ Max.) Btu/h 17,100 (5,800 ~ 19,100) 19,800 (5,800 ~ 27,600)
  • Page 16: Part 3 Printed Circuit Board Connector Wiring Diagram

    SiBE061121.book Page 6 Friday, April 22, 2011 4:12 PM SiBE061121 Part 3 Printed Circuit Board Connector Wiring Diagram 1. Indoor Unit....................7 2. Outdoor Unit..................10 2.1 RXG25/35K2V1B ...................10 2.2 RXG50K2V1B ..................12 Printed Circuit Board Connector Wiring Diagram...
  • Page 17: Indoor Unit

    SiBE061121.book Page 7 Friday, April 22, 2011 4:12 PM SiBE061121 Indoor Unit 1. Indoor Unit PCB (1): Main PCB Connectors and Other Parts 1) S1 Connector for fan motor 2) S2 Connector for terminal board 3) S6 Connector for swing motor 4) S21 Connector for centralized control (HA) 5) S26...
  • Page 18 SiBE061121.book Page 8 Friday, April 22, 2011 4:12 PM Indoor Unit SiBE061121 PCB Detail PCB (1): Main PCB LED A 2P273247-1 Printed Circuit Board Connector Wiring Diagram...
  • Page 19 SiBE061121.book Page 9 Friday, April 22, 2011 4:12 PM SiBE061121 Indoor Unit PCB (2): Display PCB 3P273252-1 PCB (3): Service PCB S2W-1 3P273254-1 Printed Circuit Board Connector Wiring Diagram...
  • Page 20: Outdoor Unit

    SiBE061121.book Page 10 Friday, April 22, 2011 4:12 PM Outdoor Unit SiBE061121 2. Outdoor Unit RXG25/35K2V1B Connectors and PCB (1): Filter PCB Other Parts 1) S11 Connector for main PCB 2) AC1, AC2, S Connector for terminal board 3) E1, E2 Terminal for earth 4) HL2, HN2 Connector for main PCB...
  • Page 21 SiBE061121.book Page 11 Friday, April 22, 2011 4:12 PM SiBE061121 Outdoor Unit PCB Detail PCB (1): Filter PCB E1, E2 (on main PCB) 3P254234-1 PCB (2): Main PCB U VW LED A S100 S50 2P254206-9 PCB (3): Forced Cooling Operation Switch PCB S110 3P255755-1 Printed Circuit Board Connector Wiring Diagram...
  • Page 22: Rxg50K2V1B

    SiBE061121.book Page 12 Friday, April 22, 2011 4:12 PM Outdoor Unit SiBE061121 RXG50K2V1B Connectors and PCB (1): Main PCB Other Parts 1) S10 Connector for terminal board (indoor - outdoor transmission) 2) S20 Connector for electronic expansion valve coil 3) S40 Connector for overload protector 4) S51, S101 Connector for service monitor PCB...
  • Page 23 SiBE061121.book Page 13 Friday, April 22, 2011 4:12 PM SiBE061121 Outdoor Unit PCB Detail PCB (1): Main PCB S101 2P282217-1 PCB (2): Service Monitor PCB LED A SW4-C S102 3P169059-1 Printed Circuit Board Connector Wiring Diagram...
  • Page 24: Part 4 Function And Control

    SiBE061121.book Page 14 Friday, April 22, 2011 4:12 PM SiBE061121 Part 4 Function and Control 1. Main Functions..................15 1.1 Temperature Control ................15 1.2 Frequency Principle................15 1.3 Airflow Direction Control.................17 1.4 Fan Speed Control for Indoor Unit ............18 1.5 RADIANT Operation................19 1.6 Program Dry Operation ................21 1.7 Automatic Operation................22 1.8 Thermostat Control.................23...
  • Page 25: Main Functions

    SiBE061121.book Page 15 Monday, April 25, 2011 3:20 PM SiBE061121 Main Functions 1. Main Functions Temperature Control Definitions of The definitions of temperatures are classified as following. Temperatures Room temperature: temperature of lower part of the room Set temperature: temperature set by remote controller Room thermistor temperature: temperature detected by room temperature thermistor Target temperature: temperature determined by microcomputer Target temperature...
  • Page 26 SiBE061121.book Page 16 Monday, April 25, 2011 3:20 PM Main Functions SiBE061121 Drawing of The following drawing shows a schematic view of the inverter principle: Inverter Refrigerant circulation rate (high) high speed Amount of heat Amount of heat exchanged air (large) exchanged air (large) high f low f...
  • Page 27: Airflow Direction Control

    SiBE061121.book Page 17 Monday, April 25, 2011 3:20 PM SiBE061121 Main Functions Airflow Direction Control Wide-Angle The louvers, made of elastic synthetic resin, provide a wide range of airflow that guarantees a comfortable air distribution. Louvers You can adjust the position of the louvers. (R14632) (R14633) Auto-Swing...
  • Page 28: Fan Speed Control For Indoor Unit

    SiBE061121.book Page 18 Monday, April 25, 2011 3:20 PM Main Functions SiBE061121 Fan Speed Control for Indoor Unit Outline Phase control and fan speed control contains 9 steps: LLL, LL, SL, L, ML, M, MH, H, and HH. The airflow rate can be automatically controlled depending on the difference between the room thermistor temperature and the target temperature.
  • Page 29: Radiant Operation

    Part4.fm Page 19 Tuesday, April 26, 2011 10:22 AM SiBE061121 Main Functions RADIANT Operation The RADIANT operation has 2 operation modes. RADIANT 1: RADIANT operation with heating RADIANT 2: RADIANT operation only 1.5.1 Indoor Electronic Expansion Valve (Motor Operated Valve) Control Initializing with The indoor electronic expansion valve is initialized when turning on the power.
  • Page 30: Indoor Unit Fan Control

    SiBE061121.book Page 20 Monday, April 25, 2011 3:20 PM Main Functions SiBE061121 1.5.2 Indoor Unit Fan Control The movement of the indoor unit fan is different whether in RADIANT 1 or RADIANT 2. RADIANT 1 starts. Room temperature Set temperature Note: The only difference between RADIANT 1 and RADIANT 2 is the Room temperature...
  • Page 31: Program Dry Operation

    SiBE061121.book Page 21 Monday, April 25, 2011 3:20 PM SiBE061121 Main Functions Program Dry Operation Outline Program dry operation removes humidity while preventing the room temperature from lowering. Since the microcomputer controls both the temperature and airflow rate, the temperature adjustment and fan adjustment buttons are inoperable in this mode.
  • Page 32: Automatic Operation

    SiBE061121.book Page 22 Monday, April 25, 2011 3:20 PM Main Functions SiBE061121 Automatic Operation Outline Automatic Cooling / Heating Function When the AUTO mode is selected with the remote controller, the microcomputer automatically determines the operation mode as cooling or heating according to the room temperature and the set temperature at start-up, and automatically operates in that mode.
  • Page 33: Thermostat Control

    SiBE061121.book Page 23 Monday, April 25, 2011 3:20 PM SiBE061121 Main Functions Thermostat Control Thermostat control is based on the difference between the room thermistor temperature and the target temperature. Thermostat OFF Condition The temperature difference is in the zone A. Thermostat ON Condition The temperature difference returns to the zone C after being in the zone A.
  • Page 34: Night Set Mode

    SiBE061121.book Page 24 Monday, April 25, 2011 3:20 PM Main Functions SiBE061121 NIGHT SET Mode Outline When the OFF timer is set, the NIGHT SET Mode is automatically activated. The NIGHT SET Mode keeps the airflow rate setting. Detail The NIGHT SET Mode continues operation at the target temperature for the first one hour, then automatically raises the target temperature slightly in the case of cooling, or lowers it slightly in the case of heating.
  • Page 35: Econo Operation

    SiBE061121.book Page 25 Monday, April 25, 2011 3:20 PM SiBE061121 Main Functions 1.10 ECONO Operation The "ECONO operation" reduces the maximum operating current and the power consumption. This operation is particularly convenient for energy-saving-oriented users. It is also a major bonus for those whose breaker capacities do not allow the use of multiple electrical devices and air conditioners.
  • Page 36: Inverter Powerful Operation

    SiBE061121.book Page 26 Monday, April 25, 2011 3:20 PM Main Functions SiBE061121 1.11 Inverter POWERFUL Operation Outline In order to exploit the cooling and heating capacity to full extent, operate the air conditioner by increasing the indoor fan rotating speed and the compressor frequency. Detail When POWERFUL button is pressed, the fan speed and target temperature are converted to the following states for 20 minutes.
  • Page 37: Other Functions

    SiBE061121.book Page 27 Monday, April 25, 2011 3:20 PM SiBE061121 Main Functions 1.12 Other Functions 1.12.1 Hot-Start Function In order to prevent the cold air blast that normally comes when heating operation is started, the temperature of the indoor heat exchanger is detected, and either the airflow is stopped or is made very weak thereby carrying out comfortable heating of the room.
  • Page 38 SiBE061121.book Page 28 Monday, April 25, 2011 3:20 PM Main Functions SiBE061121 1.12.7 Brightness Setting of the Indoor Unit Display Each time you press the [Brightness] button on the remote controller, the brightness of the indoor unit display changes to “high”, “low”, or “off”. Refer to the operation manual for details.
  • Page 39: Function Of Thermistor

    SiBE061121.book Page 29 Monday, April 25, 2011 3:20 PM SiBE061121 Function of Thermistor 2. Function of Thermistor Outdoor electronic expansion valve Indoor electronic (4) φ 4 expansion valve (Motor operated valve) Radiant panel Four way valve (4) φ 6 Compressor (R14640) (1) Outdoor Heat 1.
  • Page 40: Control Specification

    SiBE061121.book Page 30 Monday, April 25, 2011 3:20 PM Control Specification SiBE061121 3. Control Specification Mode Hierarchy Outline There are two modes; the one is the normal operation mode and the other is the forced operation mode for installation and servicing. Detail There are following modes.
  • Page 41: Frequency Control

    SiBE061121.book Page 31 Monday, April 25, 2011 3:20 PM SiBE061121 Control Specification Frequency Control Outline Frequency is determined according to the difference between the room thermistor temperature and the target temperature. The function is explained as follows. 1. How to determine frequency 2.
  • Page 42 SiBE061121.book Page 32 Monday, April 25, 2011 3:20 PM Control Specification SiBE061121 Indoor Frequency Command ( ∆ D signal) The difference between the room thermistor temperature and the target temperature is taken as the “ ∆ D signal” and is used for frequency command. ∆D ∆D ∆D...
  • Page 43: Controls At Mode Changing / Start-Up

    SiBE061121.book Page 33 Monday, April 25, 2011 3:20 PM SiBE061121 Control Specification Controls at Mode Changing / Start-up 3.3.1 Preheating Operation Outline The inverter operation in open phase starts with the conditions of the preheating command from the indoor unit, the outdoor temperature, and the discharge pipe temperature. Detail 25/35 Class Outdoor temperature ≥...
  • Page 44 SiBE061121.book Page 34 Monday, April 25, 2011 3:20 PM Control Specification SiBE061121 3.3.2 Four Way Valve Switching Outline In heating operation, current is conducted, and in cooling and defrosting, current is not conducted. In order to eliminate the switching sound when the heating is stopped, as the four way valve coil switches from ON to OFF, the OFF delay switch of the four way valve is carried out after the operation stopped.
  • Page 45: Discharge Pipe Temperature Control

    SiBE061121.book Page 35 Monday, April 25, 2011 3:20 PM SiBE061121 Control Specification Discharge Pipe Temperature Control Outline The discharge pipe temperature is used as the internal temperature of the compressor. If the discharge pipe temperature rises above a certain level, the upper limit of frequency is set to keep this temperature from going up further.
  • Page 46: Input Current Control

    SiBE061121.book Page 36 Monday, April 25, 2011 3:20 PM Control Specification SiBE061121 Input Current Control Outline The microcomputer calculates the input current during the compressor is running, and sets the frequency upper limit from the input current. In case of heat pump model, this control which is the upper limit control of the frequency takes priority to the lower limit of control of four way valve operation compensation.
  • Page 47: Freeze-Up Protection Control

    SiBE061121.book Page 37 Monday, April 25, 2011 3:20 PM SiBE061121 Control Specification Freeze-up Protection Control Outline During cooling operation, the signal sent from the indoor unit controls the operating frequency limitation and prevents freezing of the indoor heat exchanger. (The signal from the indoor unit is divided into zones.) Detail The operating frequency limitation is judged with the indoor heat exchanger temperature.
  • Page 48: Outdoor Fan Control

    SiBE061121.book Page 38 Monday, April 25, 2011 3:20 PM Control Specification SiBE061121 Outdoor Fan Control 1. Fan ON control to cool down the electrical box The outdoor fan is turned ON when the electrical box temperature is high while the compressor is OFF.
  • Page 49: Defrost Control

    SiBE061121.book Page 39 Monday, April 25, 2011 3:20 PM SiBE061121 Control Specification 3.10 Defrost Control Outline Defrosting is carried out by the cooling cycle (reverse cycle). The defrosting time or outdoor heat exchanger temperature must be more than a certain value to finish. Detail Conditions for Starting Defrost The starting conditions is determined with the outdoor temperature and the outdoor heat...
  • Page 50: Outdoor Electronic Expansion Valve Control

    SiBE061121.book Page 40 Monday, April 25, 2011 3:20 PM Control Specification SiBE061121 3.11 Outdoor Electronic Expansion Valve Control Outline The following items are included in the outdoor electronic expansion valve control. Outdoor electronic expansion valve is fully closed. 1. Outdoor electronic expansion valve is fully closed when turning on the power. 2.
  • Page 51 SiBE061121.book Page 41 Monday, April 25, 2011 3:20 PM SiBE061121 Control Specification 3.11.1 Fully Closing with Power ON The outdoor electronic expansion valve is initialized when turning on the power. The opening position is set and the pressure equalization is developed. 3.11.2 Pressure Equalizing Control When the compressor is stopped, the pressure equalization control is activated.
  • Page 52 SiBE061121.book Page 42 Monday, April 25, 2011 3:20 PM Control Specification SiBE061121 3.11.7 Control for Disconnection of the Discharge Pipe Thermistor Outline The disconnection of the discharge pipe thermistor is detected by comparing the discharge pipe temperature with the condensing temperature. If the discharge pipe thermistor is disconnected, the outdoor electronic expansion valve opens according to the outdoor temperature and the operation frequency, and operates for a specified time, and then stops.
  • Page 53: Malfunctions

    SiBE061121.book Page 43 Monday, April 25, 2011 3:20 PM SiBE061121 Control Specification 3.12 Malfunctions 3.12.1 Detection of Overcurrent and Overload Outline An excessive output current is detected and, the OL temperature is observed to protect the compressor. Detail If the OL (compressor head) temperature exceeds 120 ~ 130°C, the system shuts down the compressor.
  • Page 54: Part 5 Operation Manual

    SiBE061121.book Page 44 Friday, April 22, 2011 4:12 PM SiBE061121 Part 5 Operation Manual 1. System Configuration................45 2. Operation Manual..................46 2.1 Names of Parts..................46 2.2 Preparation before Operation..............50 2.3 AUTO · DRY · COOL · HEAT · FAN Operation ........52 2.4 RADIANT Operation................53 2.5 Temperature Setting................54 2.6 Adjusting the Airflow Direction and Rate ..........55...
  • Page 55: System Configuration

    SiBE061121.book Page 45 Friday, April 22, 2011 4:12 PM SiBE061121 System Configuration 1. System Configuration After installation and trial operation of the room air conditioner are completed, the air conditioner should be handled and operated as described in the following pages. Every user should be informed on the correct method of operation and how to check if it can cool (or heat) well, and how to use it efficiently.
  • Page 56: Operation Manual

    SiBE061121.book Page 46 Friday, April 22, 2011 4:12 PM Operation Manual SiBE061121 2. Operation Manual Names of Parts Name of Parts Indoor Unit Louvers (vertical blades) Page 14 • The louvers are inside of the air outlet. Air outlet Flap (horizontal blade) Page 14 Radiant panel Front panel...
  • Page 57 SiBE061121.book Page 47 Friday, April 22, 2011 4:12 PM SiBE061121 Operation Manual Open the front panel Front panel stopper Strings CAUTION • The surface of the radiant panel becomes very hot during RADIANT operation. Do not touch the panel of the main unit directly. After the operation is complete, do not remove or care and clean the panel until the surface Air fi lter (upper)
  • Page 58 SiBE061121.book Page 48 Friday, April 22, 2011 4:12 PM Operation Manual SiBE061121 Name of Parts Remote Controller Signal transmitter Receiver Display (LCD) • It displays the current settings. (In this illustration, each section is shown with its displays on for the purpose of explanation.) •...
  • Page 59 SiBE061121.book Page 49 Friday, April 22, 2011 4:12 PM SiBE061121 Operation Manual Open the front cover MODE selector button • It selects the operation mode. (AUTO/DRY/COOL/HEAT/ FAN) Page 11 ECONO button • ECONO operation. Page 18 SWING button • Adjusting the airfl ow direction. Page 14 QUIET button •...
  • Page 60: Preparation Before Operation

    SiBE061121.book Page 50 Friday, April 22, 2011 4:12 PM Operation Manual SiBE061121 Preparation before Operation Preparation before Operation To set the batteries Position – correctly! Slide the front cover to take it off. Set two dry batteries AAA.LR03 (alkaline). Set the front cover as before. To fi x the remote controller holder on the wall Remote controller Choose a place from where the signals...
  • Page 61 SiBE061121.book Page 51 Friday, April 22, 2011 4:12 PM SiBE061121 Operation Manual Turn the breaker on • After the power is turned on, the fl ap of the indoor unit opens and closes once to set the reference position. To set the clock Press “...
  • Page 62: Auto · Dry · Cool · Heat · Fan Operation

    SiBE061121.book Page 52 Friday, April 22, 2011 4:12 PM Operation Manual SiBE061121 AUTO · DRY · COOL · HEAT · FAN Operation AUTO · DRY · COOL · HEAT · FAN Operation The air conditioner operates with the operation mode of your choice. From the next time on, the air conditioner will operate with the same operation mode.
  • Page 63: Radiant Operation

    SiBE061121.book Page 53 Friday, April 22, 2011 4:12 PM SiBE061121 Operation Manual RADIANT Operation RADIANT Operation The RADIANT operation provides a comfortable environment with quiet and currentless heating operation in addition to the HEAT operation mode. The RADIANT operation has 2 operation modes. To start RADIANT operation Press and select an HEAT operation.
  • Page 64: Temperature Setting

    SiBE061121.book Page 54 Friday, April 22, 2011 4:12 PM Operation Manual SiBE061121 Temperature Setting Temperature Setting To change the temperature setting Press • The displayed items on the LCD will change whenever either one of the buttons is pressed. HEAT or RADIANT COOL operation AUTO operation DRY or FAN operation...
  • Page 65: Adjusting The Airflow Direction And Rate

    SiBE061121.book Page 55 Friday, April 22, 2011 4:12 PM SiBE061121 Operation Manual Adjusting the Airflow Direction and Rate Adjusting the Airfl ow Direction and Rate You can adjust the airfl ow direction to increase your comfort. To start auto swing Upper and lower airfl ow direction Press “...
  • Page 66 SiBE061121.book Page 56 Friday, April 22, 2011 4:12 PM Operation Manual SiBE061121 Adjusting the Airfl ow Direction and Rate To adjust the airfl ow rate setting Press • Each pressing of advances the airfl ow rate setting in sequence. Auto Indoor unit quiet Middle low High...
  • Page 67: Powerful Operation

    SiBE061121.book Page 57 Friday, April 22, 2011 4:12 PM SiBE061121 Operation Manual POWERFUL Operation POWERFUL Operation POWERFUL operation quickly maximises the cooling (heating) effect in any operation mode. You can get the maximum capacity. To start POWERFUL operation Press during operation. •...
  • Page 68: Outdoor Unit Quiet Operation

    SiBE061121.book Page 58 Friday, April 22, 2011 4:12 PM Operation Manual SiBE061121 OUTDOOR UNIT QUIET Operation OUTDOOR UNIT QUIET Operation OUTDOOR UNIT QUIET operation lowers the noise level of the outdoor unit by changing the frequency and fan speed on the outdoor unit. This function is con- venient during the night.
  • Page 69: Econo Operation

    SiBE061121.book Page 59 Friday, April 22, 2011 4:12 PM SiBE061121 Operation Manual ECONO Operation ECONO Operation ECONO operation is a function which enables effi cient operation by limiting the maximum power consumption value. This function is useful for cases in which attention should be paid to ensure a circuit breaker will not trip when the product runs alongside other appliances.
  • Page 70: Off Timer Operation

    SiBE061121.book Page 60 Friday, April 22, 2011 4:12 PM Operation Manual SiBE061121 2.10 OFF TIMER Operation OFF TIMER Operation Timer functions are useful for automatically switching the air conditioner on or off at night or in the morning. You can also use OFF TIMER and ON TIMER in com- bination.
  • Page 71: On Timer Operation

    SiBE061121.book Page 61 Friday, April 22, 2011 4:12 PM SiBE061121 Operation Manual 2.11 ON TIMER Operation ON TIMER Operation To use ON TIMER operation • Check that the clock is correct. If not, set the clock to the present time. Page 10 Press “...
  • Page 72: Weekly Timer Operation

    SiBE061121.book Page 62 Friday, April 22, 2011 4:12 PM Operation Manual SiBE061121 2.12 WEEKLY TIMER Operation WEEKLY TIMER Operation Up to 4 timer settings can be saved for each day of the week. It is convenient if the WEEKLY TIMER is set according to the family’s life style.
  • Page 73 SiBE061121.book Page 63 Friday, April 22, 2011 4:12 PM SiBE061121 Operation Manual To use WEEKLY TIMER operation Setting mode • Make sure the day of the week and time are set. If not, set the day of the week and time. Page 10 Program 1 Program 2...
  • Page 74 SiBE061121.book Page 64 Friday, April 22, 2011 4:12 PM Operation Manual SiBE061121 WEEKLY TIMER Operation Press to select the desired time. • The time can be set between 0:00 and 23:50 in 10 minute intervals. • To return to the ON/OFF TIMER mode setting, press •...
  • Page 75 SiBE061121.book Page 65 Friday, April 22, 2011 4:12 PM SiBE061121 Operation Manual Copy mode • A reservation made once can be copied to another day of the week. The whole reservation of the selected day of the week will be copied. Program 1 Program 2 Program 3 Program 4...
  • Page 76 SiBE061121.book Page 66 Friday, April 22, 2011 4:12 PM Operation Manual SiBE061121 WEEKLY TIMER Operation Confi rming a reservation • The reservation can be confi rmed. Setting Displays Normal Confi rmation Press • The day of the week and the reservation number of the current day will be displayed. Press to select the day of the week and the reservation number to be confi rmed.
  • Page 77 SiBE061121.book Page 67 Friday, April 22, 2011 4:12 PM SiBE061121 Operation Manual To delete reservations The individual reservation Press • The day of the week and the reservation number will be displayed. Press to select the day of the week and the reservation number to be deleted.
  • Page 78: Quick Reference

    SiBE061121.book Page 68 Friday, April 22, 2011 4:12 PM Operation Manual SiBE061121 2.13 Quick Reference Quick Reference 3P276869-1 Operation Manual...
  • Page 79: Part 6 Service Diagnosis

    SiBE061121.book Page 69 Friday, April 22, 2011 4:12 PM SiBE061121 Part 6 Service Diagnosis 1. Troubleshooting with LED ..............71 1.1 Indoor Unit....................71 1.2 Outdoor Unit ...................71 2. Problem Symptoms and Measures ............72 3. Service Check Function ................73 4. Troubleshooting ..................76 4.1 Error Codes and Description ..............76 4.2 Indoor Unit PCB Abnormality ..............77 4.3 Freeze-up Protection Control or Heating Peak-cut Control....78...
  • Page 80 SiBE061121.book Page 70 Friday, April 22, 2011 4:12 PM SiBE061121 5.11 Outdoor Fan System Check ..............127 5.12 Main Circuit Short Check..............127 5.13 Capacitor Voltage Check..............128 5.14 Power Module Check ................128 Service Diagnosis...
  • Page 81: Troubleshooting With Led

    SiBE061121.book Page 71 Monday, April 25, 2011 3:21 PM SiBE061121 Troubleshooting with LED 1. Troubleshooting with LED Indoor Unit Operation Lamp The operation lamp blinks when any of the following errors is detected. 1. When a protection device of the indoor or outdoor unit is activated, or when the thermistor malfunctions.
  • Page 82: Problem Symptoms And Measures

    SiBE061121.book Page 72 Monday, April 25, 2011 3:21 PM Problem Symptoms and Measures SiBE061121 2. Problem Symptoms and Measures Symptom Check Item Details of Measure Reference Page The unit does not operate. Check the power supply. Check if the rated voltage is supplied. —...
  • Page 83: Service Check Function

    SiBE061121.book Page 73 Monday, April 25, 2011 3:21 PM SiBE061121 Service Check Function 3. Service Check Function 1. When the timer cancel button is held down for 5 seconds, 00 is displayed on the temperature Check Method 1 display screen. Timer cancel button (R14553) <...
  • Page 84 SiBE061121.book Page 74 Monday, April 25, 2011 3:21 PM Service Check Function SiBE061121 Check Method 2 1. Press the center of the Temp button and the Mode button at the same time. (R11669) is displayed on the LCD. (R11821) 2. Select 5C (service check) with the Temp▲ or ▼ button. 3.
  • Page 85 SiBE061121.book Page 75 Monday, April 25, 2011 3:21 PM SiBE061121 Service Check Function 6. Press the Mode button. (R11672) The right-side number blinks. (R11673) 7. Press the Temp ▲ or ▼ button and change the number until you hear the beep. (R11671) 8.
  • Page 86: Troubleshooting

    SiBE061121.book Page 76 Monday, April 25, 2011 3:21 PM Troubleshooting SiBE061121 4. Troubleshooting Error Codes and Description Reference Error Codes Description Page System Normal — U0★ Refrigerant shortage Low-voltage detection or over-voltage detection Signal transmission error (between indoor unit and outdoor unit) Unspecified voltage (between indoor unit and outdoor unit) Indoor Indoor unit PCB abnormality...
  • Page 87: Indoor Unit Pcb Abnormality

    SiBE061121.book Page 77 Monday, April 25, 2011 3:21 PM SiBE061121 Troubleshooting Indoor Unit PCB Abnormality Remote Controller Display Method of The system checks if the circuit works properly within the microcomputer of the indoor unit. Malfunction Detection Malfunction The system cannot set the internal settings. Decision Conditions Supposed...
  • Page 88: Freeze-Up Protection Control Or Heating Peak-Cut Control

    SiBE061121.book Page 78 Monday, April 25, 2011 3:21 PM Troubleshooting SiBE061121 Freeze-up Protection Control or Heating Peak-cut Control Remote Controller Display Method of Freeze-up protection control Malfunction During cooling operation, the freeze-up protection control (operation halt) is activated according to the temperature detected by the indoor heat exchanger thermistor. Detection Heating peak-cut control During heating operation, the temperature detected by the indoor heat exchanger thermistor...
  • Page 89 SiBE061121.book Page 79 Monday, April 25, 2011 3:21 PM SiBE061121 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Refer to P.119 Check the air passage. Is there any short circuit? Provide sufficient air passage.
  • Page 90: Fan Motor (Dc Motor) Or Related Abnormality

    SiBE061121.book Page 80 Monday, April 25, 2011 3:21 PM Troubleshooting SiBE061121 Fan Motor (DC Motor) or Related Abnormality Remote Controller Display Method of The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor operation. Malfunction Detection Malfunction...
  • Page 91 SiBE061121.book Page 81 Monday, April 25, 2011 3:21 PM SiBE061121 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.02 Turn off the power supply Refer to P.120 and rotate the fan by hand.
  • Page 92: Radiant Panel Temperature Rise, Indoor Electronic Expansion Valve (Motor Operated Valve) Abnormality, Freeze-Up Protection Control

    SiBE061121.book Page 82 Monday, April 25, 2011 3:21 PM Troubleshooting SiBE061121 Radiant Panel Temperature Rise, Indoor Electronic Expansion Valve (Motor Operated Valve) Abnormality, Freeze-up Protection Control Remote Controller Display Method of Radiant panel temperature rise During RADIANT operation, high temperature control (e.g., operation halt, indoor electronic Malfunction expansion valve closure) is activated according to the temperature detected by the radiant Detection...
  • Page 93 SiBE061121.book Page 83 Monday, April 25, 2011 3:21 PM SiBE061121 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 ∗ When the outdoor temperature is below the Check the operation condition.
  • Page 94: Thermistor Or Related Abnormality (Indoor Unit)

    SiBE061121.book Page 84 Monday, April 25, 2011 3:21 PM Troubleshooting SiBE061121 Thermistor or Related Abnormality (Indoor Unit) C4 , C9 , CE Remote Controller Display Method of The temperatures detected by the thermistors determine thermistor errors. Malfunction Detection Malfunction The thermistor input is more than 4.96 V or less than 0.04 V during compressor operation. Decision Conditions Supposed...
  • Page 95: Signal Transmission Error (Between Indoor Unit And Outdoor Unit)

    SiBE061121.book Page 85 Monday, April 25, 2011 3:21 PM SiBE061121 Troubleshooting Signal Transmission Error (between Indoor Unit and Outdoor Unit) Remote Controller Display Method of The data received from the outdoor unit in indoor unit-outdoor unit signal transmission is checked whether it is normal. Malfunction Detection Malfunction...
  • Page 96: Unspecified Voltage (Between Indoor Unit And Outdoor Unit)

    SiBE061121.book Page 86 Monday, April 25, 2011 3:21 PM Troubleshooting SiBE061121 Unspecified Voltage (between Indoor Unit and Outdoor Unit) Remote Controller Display Method of The supply power is detected for its requirements (different from pair type and multi type) by the indoor / outdoor transmission signal.
  • Page 97: Outdoor Unit Pcb Abnormality

    SiBE061121.book Page 87 Monday, April 25, 2011 3:21 PM SiBE061121 Troubleshooting Outdoor Unit PCB Abnormality 4.9.1 25/35 Class Remote Controller Display Method of The system follows the microprocessor program as specified. Malfunction The system checks to see if the zero-cross signal comes in properly. Detection Malfunction The microprocessor program runs out of control.
  • Page 98 SiBE061121.book Page 88 Monday, April 25, 2011 3:21 PM Troubleshooting SiBE061121 4.9.2 50 Class Remote Controller Display Method of Detection within the program of the microcomputer Malfunction Detection Malfunction The program of the microcomputer is in abnormal running order. Decision Conditions Supposed Defective outdoor unit PCB...
  • Page 99: Ol Activation (Compressor Overload)

    SiBE061121.book Page 89 Monday, April 25, 2011 3:21 PM SiBE061121 Troubleshooting 4.10 OL Activation (Compressor Overload) Remote Controller Display Method of A compressor overload is detected through compressor OL. Malfunction Detection Malfunction If the error repeats, the system is shut down. Decision Reset condition: Continuous run for about 60 minutes without any other error ∗...
  • Page 100: Compressor Lock

    SiBE061121.book Page 90 Monday, April 25, 2011 3:21 PM Troubleshooting SiBE061121 4.11 Compressor Lock Remote Controller Display Method of A compressor lock is detected by checking the compressor running condition through the position detection circuit. Malfunction Detection Malfunction <25/35 class> Decision Operation stops due to overcurrent.
  • Page 101: Dc Fan Lock

    SiBE061121.book Page 91 Monday, April 25, 2011 3:21 PM SiBE061121 Troubleshooting 4.12 DC Fan Lock Remote Controller Display Method of An error is determined with the high-voltage fan motor rotation speed detected by the Hall IC. Malfunction Detection Malfunction The fan does not start in 15 ~ 30 seconds (depending on the model) even when the fan Decision motor is running.
  • Page 102: Input Overcurrent Detection

    SiBE061121.book Page 92 Monday, April 25, 2011 3:21 PM Troubleshooting SiBE061121 4.13 Input Overcurrent Detection Remote Controller Display Method of An input overcurrent is detected by checking the input current value with the compressor running. Malfunction Detection Malfunction The following current with the compressor running continues for 2.5 seconds. Decision Cooling / Heating: Above 9.25 ~ 20 A (depending on the model) The upper limit of the current decreases when the outdoor temperature exceeds a certain...
  • Page 103: Four Way Valve Abnormality

    SiBE061121.book Page 93 Monday, April 25, 2011 3:21 PM SiBE061121 Troubleshooting 4.14 Four Way Valve Abnormality Remote Controller Display Method of The room temperature thermistor, the indoor heat exchanger thermistor, the outdoor temperature thermistor, and the outdoor heat exchanger thermistor are checked if they function Malfunction within their normal ranges in each operation mode.
  • Page 104 SiBE061121.book Page 94 Monday, April 25, 2011 3:21 PM Troubleshooting SiBE061121 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Four way valve coil Correct it. Refer to P.119 disconnected (loose)? Check No.13 Refer to P.122...
  • Page 105: Discharge Pipe Temperature Control

    SiBE061121.book Page 95 Monday, April 25, 2011 3:21 PM SiBE061121 Troubleshooting 4.15 Discharge Pipe Temperature Control Remote Controller Display Method of An error is determined with the temperature detected by the discharge pipe thermistor. Malfunction Detection Malfunction If the temperature detected by the discharge pipe thermistor rises above A °C, the Decision compressor stops.
  • Page 106: High Pressure Control In Cooling

    SiBE061121.book Page 96 Monday, April 25, 2011 3:21 PM Troubleshooting SiBE061121 4.16 High Pressure Control in Cooling Remote Controller Display Method of High-pressure control (operation halt, frequency drop, etc.) is activated in cooling operation if the temperature sensed by the outdoor heat exchanger thermistor exceeds the limit. Malfunction Detection Malfunction...
  • Page 107: Compressor System Sensor Abnormality

    SiBE061121.book Page 97 Monday, April 25, 2011 3:21 PM SiBE061121 Troubleshooting 4.17 Compressor System Sensor Abnormality 4.17.1 25/35 Class Remote Controller Display Method of The system checks the DC current before the compressor starts. Malfunction Detection Malfunction The DC current before compressor start-up is out of the range 0.5 ~ 4.5 V (sensor output converted to voltage value) Decision The DC voltage before compressor start-up is below 50 V.
  • Page 108 SiBE061121.book Page 98 Monday, April 25, 2011 3:21 PM Troubleshooting SiBE061121 4.17.2 50 Class Remote Controller Display Method of The system checks the supply voltage and the DC voltage before the compressor starts. The system checks the compressor current right after the compressor starts. Malfunction Detection Malfunction...
  • Page 109: Position Sensor Abnormality

    SiBE061121.book Page 99 Monday, April 25, 2011 3:21 PM SiBE061121 Troubleshooting 4.18 Position Sensor Abnormality Remote Controller Display Method of A compressor start-up failure is detected by checking the compressor running condition through the position detection circuit. Malfunction Detection Malfunction If the error repeats, the system is shut down.
  • Page 110 SiBE061121.book Page 100 Monday, April 25, 2011 3:21 PM Troubleshooting SiBE061121 Troubleshooting 25/35 class Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.15 Refer to P.123 Turn off the power. Check No.18 Check the power supply voltage.
  • Page 111 SiBE061121.book Page 101 Monday, April 25, 2011 3:21 PM SiBE061121 Troubleshooting Troubleshooting 50 class Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.15 Refer to P.123 Turn off the power. Check No.18 Check the power supply voltage.
  • Page 112: Dc Voltage / Current Sensor Abnormality (25/35 Class)

    SiBE061121.book Page 102 Monday, April 25, 2011 3:21 PM Troubleshooting SiBE061121 4.19 DC Voltage / Current Sensor Abnormality (25/35 Class) Remote Controller Display Method of DC voltage or DC current sensor abnormality is identified based on the compressor running frequency and the input current. Malfunction Detection Malfunction...
  • Page 113: Ct Or Related Abnormality (50 Class)

    SiBE061121.book Page 103 Monday, April 25, 2011 3:21 PM SiBE061121 Troubleshooting 4.20 CT or Related Abnormality (50 Class) Remote Controller Display Method of A CT or related error is detected by checking the compressor running frequency and CT- detected input current. Malfunction Detection Malfunction...
  • Page 114 SiBE061121.book Page 104 Monday, April 25, 2011 3:21 PM Troubleshooting SiBE061121 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.12 Turn off the power and turn it on Refer to P.121 again.
  • Page 115: Thermistor Or Related Abnormality (Outdoor Unit)

    SiBE061121.book Page 105 Monday, April 25, 2011 3:21 PM SiBE061121 Troubleshooting 4.21 Thermistor or Related Abnormality (Outdoor Unit) H9 , J3 , J6 , P4 Remote Controller Display Method of This fault is identified based on the thermistor input voltage to the microcomputer. A thermistor fault is identified based on the temperature sensed by each thermistor.
  • Page 116 SiBE061121.book Page 106 Monday, April 25, 2011 3:21 PM Troubleshooting SiBE061121 In case of “ H9 ” “ J3 ” “ J6 ” Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Turn on the power again.
  • Page 117: Electrical Box Temperature Rise

    SiBE061121.book Page 107 Monday, April 25, 2011 3:21 PM SiBE061121 Troubleshooting 4.22 Electrical Box Temperature Rise Remote Controller Display Method of An electrical box temperature rise is detected by checking the radiation fin thermistor with the compressor off. Malfunction Detection Malfunction With the compressor off, the radiation fin temperature is above A °C.
  • Page 118 SiBE061121.book Page 108 Monday, April 25, 2011 3:21 PM Troubleshooting SiBE061121 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.17 WARNING Turn off the power and turn it on again.
  • Page 119: Radiation Fin Temperature Rise

    SiBE061121.book Page 109 Monday, April 25, 2011 3:21 PM SiBE061121 Troubleshooting 4.23 Radiation Fin Temperature Rise Remote Controller Display Method of A radiation fin temperature rise is detected by checking the radiation fin thermistor with the compressor on. Malfunction Detection Malfunction If the radiation fin temperature with the compressor on is above A °C.
  • Page 120 SiBE061121.book Page 110 Monday, April 25, 2011 3:21 PM Troubleshooting SiBE061121 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.17 Refer to P.126 Turn off the power and turn it on again to start the system.
  • Page 121: Output Overcurrent Detection

    SiBE061121.book Page 111 Monday, April 25, 2011 3:21 PM SiBE061121 Troubleshooting 4.24 Output Overcurrent Detection Remote Controller Display Method of An output overcurrent is detected by checking the current that flows in the inverter DC section. Malfunction Detection Malfunction A position signal error occurs while the compressor is running. Decision A speed error occurs while the compressor is running.
  • Page 122 SiBE061121.book Page 112 Monday, April 25, 2011 3:21 PM Troubleshooting SiBE061121 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.15 ∗ An output overcurrent may result from wrong internal wiring. If the system is interrupted by an output overcurrent after the wires have been disconnected and reconnected for part replacement, check the Refer to P.123 wiring again.
  • Page 123: Refrigerant Shortage

    SiBE061121.book Page 113 Monday, April 25, 2011 3:21 PM SiBE061121 Troubleshooting 4.25 Refrigerant Shortage Remote Controller Display Method of Refrigerant shortage detection I: Refrigerant shortage is detected by checking the input current value and the compressor Malfunction running frequency. If the refrigerant is short, the input current is lower than the normal value. Detection Refrigerant shortage detection II: Refrigerant shortage is detected by checking the discharge pipe temperature and the opening of...
  • Page 124 SiBE061121.book Page 114 Monday, April 25, 2011 3:21 PM Troubleshooting SiBE061121 Refrigerant shortage detection III : (25/35 class only) When the difference of the temperature is lower than K °C, it is regarded as refrigerant shortage. K (°C) room thermistor temperature – indoor heat exchanger temperature Cooling outdoor heat exchanger temperature –...
  • Page 125 SiBE061121.book Page 115 Monday, April 25, 2011 3:21 PM SiBE061121 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Refer to P.119 Any thermistor Replace them in position.
  • Page 126: Low-Voltage Detection Or Over-Voltage Detection

    SiBE061121.book Page 116 Monday, April 25, 2011 3:21 PM Troubleshooting SiBE061121 4.26 Low-voltage Detection or Over-voltage Detection Remote Controller Display Method of Low-voltage detection: An abnormal voltage drop is detected by the DC voltage detection circuit. Malfunction Detection Over-voltage detection: An abnormal voltage rise is detected by the over-voltage detection circuit.
  • Page 127 SiBE061121.book Page 117 Monday, April 25, 2011 3:21 PM SiBE061121 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check the supply voltage. Supply voltage as Correct the power supply. specified? Check the connection of the compressor harness.
  • Page 128: Signal Transmission Error On Outdoor Unit Pcb (50 Class Only)

    SiBE061121.book Page 118 Monday, April 25, 2011 3:21 PM Troubleshooting SiBE061121 4.27 Signal Transmission Error on Outdoor Unit PCB (50 Class Only) Remote Controller Display Method of Communication error between microcomputer mounted on the main microcomputer and PM1. Malfunction Detection Malfunction The abnormality is determined when the data sent from the PM1 can not be received for 9 Decision...
  • Page 129: Check

    SiBE061121.book Page 119 Monday, April 25, 2011 3:21 PM SiBE061121 Check 5. Check Thermistor Resistance Check Check No.01 Disconnect the connectors of the thermistors from the PCB, and measure the resistance of each thermistor using tester. The relationship between normal temperature and resistance is shown in the table and the graph below.
  • Page 130: Fan Motor Connector Check

    SiBE061121.book Page 120 Monday, April 25, 2011 3:21 PM Check SiBE061121 Fan Motor Connector Check Check No.02 1. Check the connection of connector. 2. Check the motor power supply voltage output (pins 4 - 7). 3. Check the motor control voltage (pins 4 - 3). 4.
  • Page 131: Electronic Expansion Valve Coil Check

    SiBE061121.book Page 121 Monday, April 25, 2011 3:21 PM SiBE061121 Check Electronic Expansion Valve Coil Check Check No.12 Conduct the followings to check the electronic expansion valve coil (EV). 1. Check to see if the EV connector is correctly connected to the PCB. 2.
  • Page 132: Four Way Valve Performance Check

    SiBE061121.book Page 122 Monday, April 25, 2011 3:21 PM Check SiBE061121 Four Way Valve Performance Check Check No.13 Turn off the power and turn it on again. ∗ Four way valve coil Start heating operation. Cooling / Dry : No continuity Heating : Continuity voltage at 220 - 240 Replace the outdoor unit...
  • Page 133: Inverter Checker" Check

    SiBE061121.book Page 123 Monday, April 25, 2011 3:21 PM SiBE061121 Check “Inverter Checker” Check Check No.15 Characteristics If abnormal stop occurs due to compressor startup failure or overcurrent output when using inverter unit, it is difficult to judge whether it is caused by the compressor failure or other failure (control PCB, power module, etc.).
  • Page 134: Rotation Pulse Check On The Outdoor Unit Pcb

    SiBE061121.book Page 124 Monday, April 25, 2011 3:21 PM Check SiBE061121 Diagnose method (Diagnose according to 6 LEDs lighting status.) (1) When all the LEDs are lit uniformly, the compressor is defective. → Replace the compressor. (2) When the LEDs are not lit uniformly, check the power module. →...
  • Page 135 SiBE061121.book Page 125 Monday, April 25, 2011 3:21 PM SiBE061121 Check 50 class Make sure that the voltage of 320 ± 30 V is applied. 1. Set operation off and power off. Disconnect the connector S70. 2. Check that the voltage between the pins 4 - 7 is 320 VDC. 3.
  • Page 136: Installation Condition Check

    SiBE061121.book Page 126 Monday, April 25, 2011 3:21 PM Check SiBE061121 Installation Condition Check Check No.17 Installation condition check Check the allowable dimensions of the air Change the installation suction and location or direction. discharge area. Is the discharged air Change the installation short-circuited? location or direction.
  • Page 137: Outdoor Fan System Check

    SiBE061121.book Page 127 Monday, April 25, 2011 3:21 PM SiBE061121 Check 5.11 Outdoor Fan System Check Check No.19 DC motor Check the outdoor fan system. Fan motor lead wire connector Outdoor fan running? Reconnect the connector. disconnected? Go to Check No. 15. Outdoor fan system is functioning.
  • Page 138: Capacitor Voltage Check

    SiBE061121.book Page 128 Monday, April 25, 2011 3:21 PM Check SiBE061121 5.13 Capacitor Voltage Check Check No.21 Before this check, be sure to check the main circuit for short circuit. With the circuit breaker still on, measure the voltage according to the drawing of the model in question.
  • Page 139: Part 8 Trial Operation And Field Settings

    SiBE061121.book Page 129 Friday, April 22, 2011 4:12 PM SiBE061121 Part 8 Trial Operation and Field Settings 1. Pump Down Operation................130 2. Forced Cooling Operation ..............131 3. Trial Operation ..................133 4. Field Settings ..................134 4.1 When 2 Units are Installed in 1 Room..........134 4.2 Standby Electricity Saving..............135 4.3 Jumper and Switch Settings..............135 5.
  • Page 140: Pump Down Operation

    SiBE061121.book Page 130 Friday, April 22, 2011 4:12 PM Pump Down Operation SiBE061121 1. Pump Down Operation Outline In order to protect the environment, be sure to conduct pump down operation when relocating or disposing the unit. Detail 1) Remove the valve caps from the liquid stop valve and the gas stop valve. 2) Carry out forced cooling operation.
  • Page 141: Forced Cooling Operation

    SiBE061121.book Page 131 Friday, April 22, 2011 4:12 PM SiBE061121 Forced Cooling Operation 2. Forced Cooling Operation Item Forced Cooling Conditions The forced cooling operation is allowed when both the following conditions are met. 1) The outdoor unit is not abnormal and not in the 3-minute standby mode. 2) The outdoor unit is not operating.
  • Page 142 SiBE061121.book Page 132 Friday, April 22, 2011 4:12 PM Forced Cooling Operation SiBE061121 Outdoor Unit (50 class) S102 LED-A Forced operation ON/OFF switch (R14176) Trial Operation and Field Settings...
  • Page 143: Trial Operation

    SiBE061121.book Page 133 Friday, April 22, 2011 4:12 PM SiBE061121 Trial Operation 3. Trial Operation Outline 1. Measure the supply voltage and make sure that it falls in the specified range. 2. Trial operation should be carried out in either cooling or heating mode. 3.
  • Page 144: Field Settings

    SiBE061121.book Page 134 Friday, April 22, 2011 4:12 PM Field Settings SiBE061121 4. Field Settings When 2 Units are Installed in 1 Room When 2 indoor units are installed in 1 room, 1 of the 2 pairs of indoor unit and wireless remote controller can be set for different address.
  • Page 145: Standby Electricity Saving

    SiBE061121.book Page 135 Friday, April 22, 2011 4:12 PM SiBE061121 Field Settings Standby Electricity Saving Outline 25/35 Class Only This function turns power supply OFF to the outdoor unit and sets the indoor unit into energy- saving mode, thus reducing the power consumption of the air conditioner. Detail Following procedure is required for turning ON the function.
  • Page 146: Application Of Silicon Grease To A Power Transistor And A Diode Bridge

    SiBE061121.book Page 136 Friday, April 22, 2011 4:12 PM Application of Silicon Grease to a Power Transistor and a Diode Bridge SiBE061121 5. Application of Silicon Grease to a Power Transistor and a Diode Bridge Applicable All outdoor units using inverter type compressor for room air conditioner. Models When the printed circuit board (PCB) of an outdoor unit is replaced, it is required that silicon grease (*1) is certainly applied to the heat radiation part (the contact point to the radiation fin) of...
  • Page 147: Part 9 Appendix

    SiBE061121.book Page 137 Friday, April 22, 2011 4:12 PM SiBE061121 Part 9 Appendix 1. Piping Diagrams..................138 1.1 Indoor Unit....................138 1.2 Outdoor Unit ..................139 2. Wiring Diagrams..................140 2.1 Indoor Unit....................140 2.2 Outdoor Unit ..................141 Appendix...
  • Page 148: Piping Diagrams

    SiBE061121.book Page 138 Monday, April 25, 2011 3:22 PM Piping Diagrams SiBE061121 1. Piping Diagrams Indoor Unit FVXG25/35K2V1B FVXG50K2V1B INDOOR UNIT INDOOR UNIT RADIANT PANEL RADIANT PANEL THERMISTOR 6.4CuT THERMISTOR 6.4CuT THERMISTOR THERMISTOR HEAT EXCHANGER HEAT EXCHANGER THERMISTOR THERMISTOR ON HEAT EXCH. ON HEAT EXCH.
  • Page 149: Outdoor Unit

    SiBE061121.book Page 139 Monday, April 25, 2011 3:22 PM SiBE061121 Piping Diagrams Outdoor Unit RXG25/35K2V1B OUTDOOR UNIT OUTDOOR TEMPERATURE HEAT EXCHANGER THERMISTOR 7.0CuT 7.0CuT HEAT EXCHANGER THERMISTOR MOTOR OPERATED VALVE 4.8CuT 6.4CuT 6.4CuT 4.8CuT MUFFLER MUFFLER WITH WITH FILTER FILTER PROPELLER FAN 9.5CuT MUFFLER...
  • Page 150: Wiring Diagrams

    SiBE061121.book Page 140 Monday, April 25, 2011 3:22 PM Wiring Diagrams SiBE061121 2. Wiring Diagrams Indoor Unit FVXG25/35/50K2V1B PCB1 PCB3 → RECTIFIER S2W(4) 3.15A outdoor MR10 GRN/YLW PCB2 C102 FIELD WIRING. SIGNAL RECEIVER TRANSMISSION CAUTION CIRCUIT NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS C101...
  • Page 151: Outdoor Unit

    SiBE061121.book Page 141 Monday, April 25, 2011 3:22 PM SiBE061121 Wiring Diagrams Outdoor Unit RXG25/35K2V1B FIELD WIRING. indoor MRM20 IPM1 MRM10 C119 MR30 3.15A PCB2 3.15A W V U IPM2 MR30_A MR30_B MRCW S100 PCB1 X11A outdoor NOTE 1.REFER TO THE NAMEPLATE FOR THE POWER REQUIREMENTS. t˚...

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