Page 1 J-Series Single- Zone Cassette and Ducted Type Model Outdoor Condensor MR36UY3J Outdoor Condensor MR24UY3J Indoor Cassette MC36Y3J Indoor Cassette MC24Y3J Indoor Ducted MD36Y3J Indoor Ducted MD24Y3J 96991405_00...
Page 2: Table Of Contents
TABLE OF CONTENTS Table of Contents INTRODUCTION‑ Important Safety Information‑ Personal Injury Or Death Hazards‑ Model Identification Guide‑ Model Line Up‑ Control systems (standard)‑ SPECIFICATIONS‑ Ceiling Cassette 4‑way ‑ Ceiling Concealed Duct (High Static)‑ Outdoor Units DC Inverter SINGLE ZONE‑ Operation Range‑...
Page 3 TABLE OF CONTENTS Standard Operation ‑ Fan Mode‑ Function Setting ‑ Fan Speed Selection‑ Function Setting ‑ Room Temperature Check‑ Function setting ‑ Child Lock‑ Simultaneous Mode Lockout‑ Maintenance and Service‑ List of Functions‑ How To Set E.s.p. On The Remote Controller‑ Ceiling cassette‑...
Page 4 TABLE OF CONTENTS COMPONENTS TESTING‑ Circuit Board Diagram‑ Ceiling Cassette 4‑way‑ Ceiling Concealed Duct (High Static) 24k‑ Ceiling Concealed Duct (High Static) 36k‑ Outdoor 24k‑ Outdoor 36k‑ Branch Diagram ‑ Cassette‑ Single Branch Duct _ Single Zone‑ Ducting “2” side branches _ Single Zone‑ Setting Vane angle using DWC1‑...
Page 5 TABLE OF CONTENTS Outdoor Unit DC Inverter SINGLE ZONE 24k‑ Outdoor Unit DC Inverter SINGLE ZONE 36k‑ Outdoor Unit DC Inverter SINGLE ZONE ‑Field Wiring‑ PARTS CATALOG‑ Ceiling Cassette 4‑way ‑ Ceiling Concealed Duct (High Static) 24k‑ Ceiling Concealed Duct (High Static) 36k‑ Outdoor Unit DC Inverter SINGLE ZONE 24k‑...
Page 6: Introduction
INTRODUCTION Important Safety Information The information in this manual is intended for use by a qualified technician who is familiar with the safety procedures required for installation and repair, and who is equipped with the proper tools and test instruments required to service this product.
Page 7 INTRODUCTION Important Safety Information CAUTION DO NOT OPERATE EQUIPMENT DURING ACTIVE STAGES OF CONSTRUCTION To ensure proper operation, Friedrich requires that all equipment is not operated during active construction phases. This includes active stages of completing framing, drywalling, spackling, sanding, painting, flooring, and moulding in the equipment’s designated conditioning space. The use of this equipment during construction could result in premature failure of the components and/or system and is in violation of our standard warranty guidelines.
Page 8: Personal Injury Or Death Hazards
INTRODUCTION Personal Injury Or Death Hazards WARNING AVERTISSEMENT ADVERTENCIA Do not remove, disable or Ne pas supprime, désactiver ou No eliminar, desactivar o pasar SAFETY bypass this unit’s safety contourner cette l´unité des por alto los dispositivos de devices. Doing so may cause dispositifs de sécurité, faire vous seguridad de la unidad.
Page 9: Model Identification Guide
INTRODUCTION Model Identification Guide Installation Type M : Multi Zone n i t Electrical rating 1 : 115V, 1Ø, 60Hz , Ø Refrigeration Cycle C : Cool Only Y : Heat Pump Application Empty : Single U : Universal D : Dual Zone T : Tri-Zone Q : Quad Zone Capacity...
Page 10: Model Line Up
INTRODUCTION Model Line Up Model Name Category Type Chassis Nominal Capacity, Btu/h(kW) 24,000 (7.03) 36,000 (10.5) MC24Y3J Ceiling 4way cassette MC36Y3J MD24Y3J Ceiling High Concealed Static Duct MD36Y3J Figure 102 (Indoor Model Line Up) Btu/h 24,000 36,000 Nominal Capacity 7.03 10.5 Model Names MR24UY3J...
Page 11: Control Systems (Standard)
INTRODUCTION Control systems (standard) Type Individual controller Applicable model Wireless remote Ceiling cassette controller Ceiling Concealed Duct Simple wired remote controller (High Static) SPEED TEMP OPER MODE Figure 104...
Page 12: Specifications
SPECIFICATIONS Ceiling Cassette 4-way MC24Y3J MC36Y3J Model Name Power Supply V, Ø, Hz 208/230, 1, 60 208/230, 1, 60 Power Input Running Current 0.60 1.00 Casing Color W x H x D 840 × 204 × 840 840 × 288 × 840 Dimensions Body W x H x D...
Page 13: Ceiling Concealed Duct (High Static)
SPECIFICATIONS Ceiling Concealed Duct (High Static) Model Name [MD24Y3J] [MD36Y3J] Power Supply V, Ø, Hz 208/230, 1, 60 208/230, 1, 60 Power Input W x No. 230 × 1 368 × 1 Running Current 1.00 1.60 Casing Color W x H x D 1,182 ×...
Page 14: Outdoor Units Dc Inverter Single Zone
SPECIFICATIONS Outdoor Units DC Inverter SINGLE ZONE MR24UY3J MR24UY3J Outdoor unit Combination MD24Y3J Indoor unit MC24Y3J Min. ~ Rated ~ Max. 2.84 ~ 7.03 ~ 7.81 2.84 ~ 7.03 ~ 7.81 Cooling Min. ~ Rated ~ Max. Btu/h 9,700 ~ 24,000 ~ 26,700 9,700 ~ 24,000 ~ 26,700 Capacity Min.
Page 15 SPECIFICATIONS Outdoor Units DC Inverter SINGLE ZONE Model Name MR24UY3J MR36UY3J Power Supply V , Ø , Hz 208/230, 1, 60 208/230, 1, 60 Cooling Max. Starting Current Heating Max. Wiring Power Supply Cable No. x mm (AWG) 3C x 2.5 (12) 3C x 5.0 (10) Connections (included Earth)
Page 16: Operation Range
SPECIFICATIONS Outdoor Units DC Inverter SINGLE ZONE Operation Range Cooling Heating Continuous Operation Continuous Operation 81 86 91.3 57 59 82.4 Indoor Temp. [°F DB] Indoor Temperature [°F WB] Figure 205...
Page 17: Electric Characteristics
SPECIFICATIONS Outdoor Units DC Inverter SINGLE ZONE Electric characteristics External wiring procedure - The power supply work is needed only to the outdoor unit. The power supply to the indoor unit is conducted through the communication wiring. Therefore, the power supply work can be carried out at just one place of the outdoor unit. It will simplify the work procedure and save cost.
Page 18 SPECIFICATIONS Outdoor Units DC Inverter SINGLE ZONE Electric characteristics Unit Power Compressor Model Phase Voltage Cooling Heating MR24UY3J 18.1 13.5 13.5 0.124 Min.:187, 1Ø Max.:253 MR36UY3J 24.5 18.0 18.6 0.124 x 2 0.6 x 2 Notes : 1. Voltage range MCA : Minimum Circuit Amperes (A) Voltage supplied to the unit terminals should be within the minimum and maximum range...
Page 19: Product Dimensions
SPECIFICATIONS Product Dimensions Ceiling Cassette 4-way 24k Figure 208...
Page 20: Ceiling Cassette 4-Way 36K
SPECIFICATIONS Product Dimensions Ceiling Cassette 4-way 36k Figure 209...
Page 21: Ceiling Concealed Duct (High Static) 24K
SPECIFICATIONS Product Dimensions Ceiling Concealed Duct (High Static) 24k Figure 210...
Page 22: Ceiling Concealed Duct (High Static) 36K
SPECIFICATIONS Product Dimensions Ceiling Concealed Duct (High Static) 36k Figure 211...
Page 23: Outdoor Units Dc Inverter Single Zone 24K
SPECIFICATIONS Product Dimensions Outdoor Units DC Inverter SINGLE ZONE 24k Figure 212...
Page 24: Outdoor Units Dc Inverter Single Zone 36K
SPECIFICATIONS Product Dimensions Outdoor Units DC Inverter SINGLE ZONE 36k Figure 213...
Page 25: Capacity Tables
SPECIFICATIONS Capacity Tables Models : MR24UY3J + MC24Y3J • Cooling Capacity Indoor Air Temperature : DB / WB Outdoor Air Temp. 68 / 57 73 / 61 79 / 64 80 / 67 86 / 72 90 / 75 23.56 17.39 1.16 25.03 18.37 1.20 26.49 17.78 1.25 27.55 18.16 1.26...
Page 26: Models : Mr24Uy3J + Mc24Y3J
SPECIFICATIONS Capacity Tables Models : MR24UY3J + MC24Y3J • Heating Capacity Outdoor Indoor Air Temp.: °FDB Air Temp. °F DB °F WB -0.4 15.86 1.74 14.97 1.81 14.92 1.83 14.59 1.85 14.32 1.86 13.72 1.93 17.72 1.80 16.91 1.86 16.65 1.90 16.30 1.92...
Page 27: Models : Mr24Uy3J + Md24Y3J
SPECIFICATIONS Capacity Tables Models : MR24UY3J + MD24Y3J • Cooling Capacity Indoor Air Temperature : DB / WB Outdoor Air Temp. 68 / 57 73 / 61 79 / 64 80 / 67 86 / 72 90 / 75 23.56 18.87 1.22 25.03 19.93 1.26 26.49 19.30 1.31 27.55 19.71 1.32...
Page 28: Models : Mr24Uy3J + Md24Y3J
SPECIFICATIONS Capacity Tables Models : MR24UY3J + MD24Y3J • Heating Capacity Outdoor Indoor Air Temp.: °FDB Air Temp. °F DB °F WB -0.4 13.59 1.70 12.80 1.77 12.79 1.79 12.50 1.81 12.26 1.82 11.75 1.89 15.90 1.73 15.16 1.79 14.93 1.83 14.62 1.85...
Page 29: Models : Mr36Uy3J + Mc36Y3J
SPECIFICATIONS Capacity Tables Models : MR36UY3J + MC36Y3J • Cooling Capacity Indoor Air Temperature : DB / WB Outdoor Air Temp. 68 / 57 73 / 61 79 / 64 80 / 67 86 / 72 90 / 75 35.34 25.50 1.81 37.54 26.94 1.87 39.73 26.08 1.94 41.32 26.63 1.96...
Page 30: Models : Mr36Uy3J + Mc36Y3J
SPECIFICATIONS Capacity Tables Models : MR36UY3J + MC36Y3J • Heating Capacity Outdoor Indoor Air Temp.: °FDB Air Temp. °F DB °F WB -0.4 19.98 2.41 18.81 2.50 18.80 2.54 18.37 2.56 18.03 2.58 17.27 2.67 23.43 2.44 22.34 2.53 22.01 2.58 21.54 2.61...
Page 31: Models : Mr36Uy3J + Md36Y3J
SPECIFICATIONS Capacity Tables Models : MR36UY3J + MD36Y3J • Cooling Capacity Indoor Air Temperature : DB / WB Outdoor Air Temp. 68 / 57 73 / 61 79 / 64 80 / 67 86 / 72 90 / 75 35.34 26.37 1.77 37.54 27.86 1.83 39.73 26.97 1.90 41.32 27.54 1.92...
Page 32: Models : Mr36Uy3J + Md36Y3J
SPECIFICATIONS Capacity Tables Models : MR36UY3J + MD36Y3J • Heating Capacity Outdoor Indoor Air Temp.: °FDB Air Temp. °F DB °F WB -0.4 10.89 2.36 10.10 2.45 10.27 2.49 10.02 2.51 9.82 2.53 9.38 2.62 16.13 2.42 15.33 2.51 15.16 2.56 14.83 2.59...
Page 33: Ceiling Cassette 4-Way
SPECIFICATIONS Sound Pressure Data Ceiling cassette 4-way Sound levels Overall Notes: - Sound measured at 4.9ft away from the units. - Data is valid at free ﬁeld condition. - Data is valid at nominal operation condition. - Reference accoustic pressure 0dB=20µPa. Ceiling - Sound level will vary depending on a range of factors such as 4.9ft...
Page 34: Sound Pressure Data
SPECIFICATIONS Sound Pressure Data Ceiling Concealed Duct (High Static) Notes: DISCHARGE SUCTION - Sound measured at 4.9ft away from the units. - Data is valid at free ﬁeld condition. DUCT DUCT - Data is valid at nominal operation condition. - Reference accoustic pressure 0dB=20µPa. - Sound level will vary depending on a range of factors such as 1m(3.3ft) 2m(6.6ft)
Page 35 SPECIFICATIONS Sound Pressure Levels Outdoor Units DC Inverter SINGLE ZONE Sound levels Overall Notes: - Sound measured at 3.3ft away from the units. - Data is valid at free ﬁeld condition - Data is valid at nominal operation condition - Reference accoustic pressure 0dB = 20µPa - Sound level will vary depending on a range of factors such as the 4.9ft construction(acoustic absorption coefﬁcient) of particular room in...
Page 36: Ceiling Cassette 4-Way
SPECIFICATIONS Air flow and temperature distributions Ceiling cassette 4-way Cooling Heating Discharge angle: 40° Discharge angle: 50° Air velocity [ft/s] Air velocity [ft/s] 13ft 10ft 10ft 13ft 13ft 10ft 10ft 13ft Teftperature [°F] Teftperature [°F] 13ft 10ft 10ft 13ft 13ft 10ft 10ft 13ft...
Page 37: Piping Diagrams
SPECIFICATIONS Piping Diagrams Ceiling cassette 4-way Gas pipe connection port Heat exchanger (ﬂare connection) Heating Thermistor for Cooling Turbo fan Evaporator Thermistor for outlet temperature suction air temperature Thermistor for Evaporator inlet temperature Liquid pipe connection port (ﬂare connection) Description PCB Connector Thermistor for suction air temperature CN-ROOM...
Page 38: Ceiling Concealed Duct (High Static)
SPECIFICATIONS Piping Diagrams Ceiling Concealed Duct (High Static) Gas pipe connection port Heat exchanger (ﬂare connection) Heating Thermistor for Cooling Sirocco Fan evaporator outlet Thermistor for temperature suction air temperature Thermistor for evaporator inlet temperature Liquid pipe connection port (ﬂare connection) Description PCB Connector Thermistor for suction air temperature...
Page 39: Outdoor Units Dc Inverter Single Zone
SPECIFICATIONS Piping Diagrams Outdoor Units DC Inverter SINGLE ZONE Outdoor Unit Inlet Air Temperature Refrigerant Flow Condenser Out Thermistor Temperature Thermistor Cooling Heating Condensing Temperature Thermistor Ø9.52 (3/8) Flare Connection Strainer Strainer 36k/42k model only Liquid Side Piping Electronic Expansion Valve Pressure Sensor Gas Side...
Page 40: Capacity Coefficient Factor
SPECIFICATIONS Capacity coefficient factor Outdoor Units DC Inverter SINGLE ZONE 1) Rate of change in capacity due to the Main piping length Rate of change in cooling capacity Piping length(m(ft)) 5(16.4) 10(32.8) 15(49.2) 20(65.6) 30(98.4) 40(131.2) 50(164.0) 60(196.9) 70(229.7) 75(246.0) 99.3 97.9 96.6...
Page 41: Operation
Part 2 Functions & Controls OPERATION 1. List of Functions & Controls Functions and Controls List of Functions and Controls Category Function Description Remark Cooling Mode Cooling operation Heating Mode Heating operation Basic mode Healthy Dehumidification Dry operation controls Auto Changeover Cooling mode is automatically changed to heating mode and vice versa Surge Cool...
Page 42: Basic Mode Controls
OPERATION Part 2 Functions & Controls Functions and Controls 2. Basic Mode Controls Basic Mode Controls 2.1 Cooling Mode Thermo ON +0.5C(1F) Setting Temp. -0.5C(-1F) Thermo OFF INV. Comp. High Comp. OFF High Frequency • Operating frequency of compressor depends on the load condition, like the difference between the room temp. and the set temp., frequency restrictions.
Page 43 OPERATION Functions and Controls Part 2 Functions & Controls Basic Mode Controls 2.3 Healthy Dehumidification operation • When the dehumidification operation is set by the remote controller, the intake air temperature is detected and the set- ting temp. is automatically set according to the intake air temperature. Intake air Temp.
Page 44: Special Mode Controls
OPERATION Part 2 Functions & Controls Functions and Controls 3. Special Mode Controls Special Mode Controls 3.1 Surge Cool operation • In the heating mode or Auto Changeover operation, the Surge cool function does not work. When it is input while in other mode of operation (cooling, dehumidification, Air purification, Air circulation), the Surge cool operation takes place.
Page 45: Utility Functions
OPERATION Part 2 Functions & Controls Functions and Controls 4. Utility Functions Utility Functions 4.1 Forced operation • To operate the appliance manually in case when the remote control is lost, the forced operation selection switch is on the main unit of the appliance, and operate the appliance in the standard conditions. •...
Page 46 OPERATION Functions and Controls Part 2 Functions & Controls Utility Functions 4.3 Air volume control Step Description • UIndoor fan motor control have 6 steps or 8 steps. Super Low • UAir volume is controlled "SH", "H", "MH", "M", "ML", "L" by the remote controller.
Page 47 OPERATION Functions and Controls Part 2 Functions & Controls Utility Functions 4.6.2 Sleep timer operation for heating cycle • While in heating mode, 60 min. after the start of the sleep timer, the setting temperature decreases by 1°C(2°F). After another 60minutes lapse, it decreases again by 1°C(2°F). Setting temp.
Page 48: Ceiling Concealed Duct (High Static)
Product Introduction OPERATION Product Introduction Ceiling Concealed Duct (High Static) Product Introduction Here is a brief introduction of the indoor and outdoor units. Indoor Units Air filters Air intake vents Control box Wired Remote Controller SPEED TEMP OPER MODE Outdoor Unit Air intake vents Air outlet vents...
Page 49: Simple Wired Remote Controller
Product Introduction OPERATION Simple Wired Remote Controller Ceiling Concealed Duct (High Static) Simple Wired Remote Controller SPEED TEMP OPER MODE...
Page 50: Standard Operation - Cooling Mode
Operating Introductions Operating Introductions OPERATION Standard Operation - Cooling Mode Ceiling Concealed Duct (High Static) Standard Operation - Cooling Mode Cooling operation will begin if you press button. Press the temperature button and set the desired room temperature lower than the current room temperature.
Page 51: Standard Operation - Heating Mode
OPERATION Operating Introductions Standard Operation - Heating Mode Ceiling Concealed Duct (High Static) Standard Operation - Heating Mode If you want to set the heating operation, press the button. And press the OPER MODE button. Set the desired room temperature higher than the current room temperature.
Page 52: Standard Operation - Dehumidification Mode
OPERATION Operating Introductions Standard Operation - Dehumidification Mode Ceiling Concealed Duct (High Static) Standard Operation - Dehumidification Mode After operating the product by pressing button, set up the dry (Dehumidification) by pressing the OPER MODE button. When the dry operation is selected, “dh” will be shown on the display window as shown on the left side.
Page 53: Standard Operation - Fan Mode
Operating Introductions OPERATION Standard Operation - Fan Mode Ceiling Concealed Duct (High Static) Standard Operation - Fan Mode After operating the product by pressing button, set up the fan operation by pressing the button. OPER MODE When the dry operation is selected, “Fn” will be shown on the display window as shown on the left side.
Page 54: Function Setting - Fan Speed Selection
OPERATION Operating Introductions Function Setting - Fan Speed Selection Ceiling Concealed Duct (High Static) Function Setting - Fan Speed Selection Select the proper fan speed which you want by pressing the button on the remote controller. - If you press the button, the fan speed SPEED will change in the order of [Lo→Med→Hi].
Page 55: Function Setting - Room Temperature Check
OPERATION Operating Introductions Ceiling Concealed Duct (High Static) Function Setting - Room Temperature Check Function Setting - Room Temperature Check When prssing the button of the remote SPEED controller Adjustment section for approx. 3 seconds, the room Temperature will be indicated for about 5 seconds Before resuming to the previous display panel.
Page 56: Function Setting - Child Lock
OPERATION Ceiling Concealed Duct (High Static) Function setting - Child Lock Operating Introductions Function setting - Child Lock During the operation, when pressing the button and button for approx. 3 seconds, SPEED the ‘Child Lock’ Function can be used. - At the time of initial setting of the ‘Child Lock’, the ‘CL’...
Page 57: Simultaneous Mode Lockout
OPERATION Operating Introductions Ceiling Concealed Duct (High Static) Simultaneous Mode Lockout Simultaneous Mode Lockout Simultaneous Mode Lockout occurs when indoor units connected to the same Condenser call for different modes (Cooling/Heating) If one indoor unit operate heating mode while several indoor units are operating cooling mode, outdoor segment and cooling segment are blinking like display on the left.
Page 58: Maintenance And Service
Maintenance and Service OPERATION Maintenance and Service Ceiling Concealed Duct (High Static) Maintenance and Service CAUTION: Before performing any maintenance, turn off the main power to the system. Grille, Case, and Remote Controller o Turn the system off before cleaning. To clean, wipe with a soft, dry cloth.
Page 59: List Of Functions
OPERATION Ceiling Concealed Duct (High Static) List of Functions MD24Y3J Category Functions MD36Y3J Air supply outlet Airﬂow direction control (left & right) Airﬂow direction control (up & down) Auto swing (left & right) Air ﬂow Auto swing (up & down) Airﬂow steps (fan/cool/heat) 3 / 3 / 3 Chaos wind(auto wind)
Page 60: How To Set E.s.p. On The Remote Controller
OPERATION Ceiling Concealed Duct (High Static) How To Set E.s.p. On The Remote Controller 2.6 External Static Pressure (E.S.P) & Air Flow How to Set E.S.P. on the remote controller? This is the function that decides the strength of the wind for each wind level and because this function is to make the installation easier.
Page 61 OPERATION Ceiling Concealed Duct (High Static) How To Set E.s.p. On The Remote Controller Static Pressure(mmAq(in.Aq)) Capacity Step 2.5(0.1) 4(0.15) 6(0.23) 8(0.31) 10(0.39) 12(0.47) 14(0.55) 15(0.6) 16(0.62) 18(0.70) 20(0.78) Setting Value HIGH HIGH 1130...
Page 62: Ceiling Cassette
Product Introduction OPERATION Product Introduction Ceiling cassette Product Introduction Here is a brief introduction of the indoor and outdoor units. Please see the information specific to your indoor unit type. Indoor Units [Ceiling Cassette Type] Cabinet Air Discharge Front Panel Signal receiver Air Inlet Outdoor Unit...
Page 63: Operation Indication Lamps
OPERATION Ceiling cassette Product Introduction Operation Indication Lamps Operating Method Operation Indication Lamps [Ceiling Cassette Type] On/Off : Lights up during the system operation. Filter Sign : Lights up after 2400 hours from the time of first operating unit. Timer : Lights up during Timer operation.
Page 64: Wireless Remote Controller
Product Introduction OPERATION Wireless Remote Controller Ceiling cassette Wireless Remote Controller ENERGY SAVING Button Used to set or clear Energy saving. FAN Button Used to select Fan mode. ON/OFF Button Used to turn on/off the unit. SURGE Button Speed cooling operates super high fan speed. LEFT/RIGHT AIRFLOW Button (OPTIONAL) Used to set the desired left/right(horizontal) airflow direction.
Page 65: Cooling Mode - Standard Operation
Operating instructions Operating instructions OPERATION Ceiling cassette Cooling Mode - Standard Operation Cooling Mode - Standard Operation Press the ON/OFF button. The unit will respond with beep sound. Press MODE button to select Cooling Mode. Set the desired temperature by pressing To raise the temperature TEMP button.
Page 66: Cooling Mode - Power Cooling
Operating instructions OPERATION Cooling Mode - Power Cooling Ceiling cassette Cooling Mode - Power Cooling It makes the room cool using pleasant and fresh air quickly Press the ON/OFF button. The unit will respond with beep sound. Press MODE button to select Cooling Mode. Press the SURGE button.
Page 67: Heating Mode
Operating instructions OPERATION Heating Mode Ceiling cassette Heating Mode Press the ON/OFF button. The unit will respond with beep sound. Press MODE button to select Heating Mode. Set the desired temperature by pressing TEMP button. Press ROOM TEMPERATURE CHECKING button to check the room temperature.
Page 68: Dehumidification Mode
Operating instructions OPERATION Dehumidification Mode Ceiling cassette Dehumidification Mode Press the ON/OFF button. The unit will respond with beep sound. Press MODE button to select Dehumidification Mode. Set the fan speed. You can select the fan speed in four steps - low, medium, high, or chaos.
Page 69: Fan Mode
Operating instructions OPERATION Fan Mode Ceiling cassette Fan Mode Press the ON/OFF button. The unit will respond with beep sound. Press the FAN button. Set the fan speed again. You can select the fan speed in four steps–low, medium, high, or chaos. Each time the button is pressed, the fan speed mode is shifted.
Page 70: Energy Saving Cooling Mode
OPERATION Operating instructions Ceiling cassette Energy saving cooling mode Energy saving cooling mode This mode minimizes power consumption during cooling and increases the set temperature to the optimal level for a more comfortable environment. Press ON/OFF to turn the power on. Press MODE repeatedly to select the cooling operation.
Page 71: Auto Clean Operation
OPERATION Operating instructions Ceiling cassette Auto Clean operation Auto Clean operation In the cooling and dehumidifying operations, moisture is generated inside the indoor unit. Use the auto cleaning function to remove such moisture. Press AUTO CLEAN. is displayed on the display screen. If you turn off the power, the fan operates for 30 minutes and cleans the inside of the indoor unit.
Page 72: Temperature Setting/ Room Temperature Check
Operating instructions OPERATION Temperature setting/ room temperature check Ceiling cassette Temperature setting/ room temperature check We can simply adjust the desired temperature • Press the buttons to adjust the desired temperature : Increase 1˚C or 1˚F per one time pressing : Decrease 1˚C or 1˚F per one time pressing Room temp: Indicate the current room temperature Set temp: Indicate the temperature that user want to set...
Page 73: Celsius/Fahrenheit Switching
OPERATION Ceiling cassette Celsius/Fahrenheit Switching Setting the Current Time Operating instructions Sleep Timer Setting Celsius/Fahrenheit Switching Press the °C/°F SWITCH button to change from Celsius to Fahrenheit or from Fahrenheit to Celsius. Whenever press TEMPERATURE SETTING button in Fahrenheit mode, the temperature will increase/drop 1°F.
Page 74: On Timer Setting
OPERATION Ceiling cassette On Timer Setting Off Timer Setting Operating instructions To cancel the Timer Setting On Timer Setting 1. Press the ON button to turn timer on or off. Timer ON 2. Press TIME SETTING buttons until the desired time is set.
Page 75: Airflow Direction Control (Optional)
OPERATION Ceiling cassette Operating instructions Airflow Direction Control (Optional) Up/Down Airflow Direction Control (Optional) The up/down airflow (Vertical Airflow) can be adjusted by using the remote controller. 1. Press the ON/OFF button to start the unit. 2. Press UP/DOWN AIRFLOW button and the louvers will swing up and down. Press the UP/DOWN AIRFLOW button again to set the vertical louver at the desired airflow direction.
Page 76: Forced Operation
OPERATION Ceiling cassette Operating instructions Forced operation Forced operation Operation procedures when the remote control can't be used. The operation will be started if the ON/OFF button is pressed. If you want to stop operation, re-press the button. [Ceiling Cassette Type] Forced Operation Button Room Temp.
Page 77: Maintenance And Service
Maintenance and Service OPERATION Maintenance and Service Ceiling cassette Maintenance and Service Indoor Unit Grille, Case and Remote Control ❐ Turn the system off before cleanining, To clean, wipe with a soft, dry cloth. Do not use bleach or abrasives. NOTE Supply power must be disconnected before cleaning the indoor unit.
Page 78 OPERATION Ceiling cassette List of functions MC24Y3J Category Functions MC36Y3J Air supply outlet Airﬂow direction control (left & right) Airﬂow direction control (up & down) Auto Auto swing (left & right) Air ﬂow Auto swing (up & down) Airﬂow steps (fan/cool/heat) 4 / 5 / 4 Chaos wind(auto wind) Surge (cool/heat)
Page 79: List Of Functions
OPERATION Outdoor Units DC Inverter SINGLE ZONE List of functions MR24UY3J MR36UY3J Category Functions Defrost / Deicing High pressure switch Low pressure switch Reliability Phase protection Restart delay (3-minutes) Self diagnosis Soft start Test function Night Silent Operation Wiring Error Check Convenience Peak Control Mode Lock...
Page 80: Installation
SINGLE ZONE 1. General installation guideline INSTALLATION 1.1 Installation process & Guideline Installation process & Guideline Striking a balance between system installation & general construction work. Construction work Air conditioning work Setting sleeve and insert work details Preparation of Fitting of steel sleeves contract drawing Moulding box and reinforcement work...
Page 81: Checking The Drawing
SINGLE ZONE 1. General installation guideline INSTALLATION 1.2 Checking the drawing Checking the drawing Installation procedure Remarks Check and confirm required loads calculation, Determination of work scope model selection, drawings etc. Preparation of contract drawings Make a relationship between outdoor ,indoor controller and option connection clear.
Page 82: Guideline For Each Installation Process
SINGLE ZONE INSTALLATION 2. Guideline for each installation process Guideline for each installation process 2.1 Sleeve and insert work 2.1.1 Positioning of the pipe holes 1. The through holes for the drain piping should be positioned such that pipes have a downward gradient (the gradient must be at least 1/100.The thickness of the insulating materials must also be taken into consideration.) 2.
Page 83 SINGLE ZONE INSTALLATION 2. Guideline for each installation process Guideline for each installation process 2.1.3 Sleeve type Sleeve Insulation Pipe NOTE Sleeve type should be considered as per local regulation & laws. CAUTION 1. In high voltage generation places, water-proof flexible conduit should be used. (in substation room, in elevator room) 2.
Page 84 SINGLE ZONE INSTALLATION 2. Guideline for each installation process Guideline for each installation process 2. Support work. Insulated U-bolt type supporting Insulated O-ring band type supporting Bolt Foam resin Bolt 1.5t plate Saddle supporting Supporting interval 1.5(4.92)~2.0(6.56) m(ft) CAUTION During saddle supporting work, insulation should not be pressed by saddle as this can lead to tearing of insulation and thus falling of condensed water during product operation.
Page 85 SINGLE ZONE INSTALLATION 2. Guideline for each installation process Guideline for each installation process 2.2 Refrigerant piping work 2.2.1 Principles of refrigerant piping The “ principles of refrigerant piping “ must be strictly observed. Cause of problem Action to avoid problem -Rainwater, work water, etc gets into pipes from outside Flushing...
Page 86 SINGLE ZONE INSTALLATION 2. Guideline for each installation process Guideline for each installation process 2.2.2 Flaring work One cause of gas leakage is improper workmanship in flaring. Carry out correct flaring work in the following procedure. Cut the pipes and the cable. ①...
Page 87 SINGLE ZONE INSTALLATION 2. Guideline for each installation process Guideline for each installation process Choice of material for refrigerant piping NOTE Copper pipe selection a. The wall thickness of the refrigerant piping should comply with relevant local and national regulation for R410A the design pressure is 3.8MPa(551.1psi) b.
Page 88 SINGLE ZONE INSTALLATION 2. Guideline for each installation process Guideline for each installation process NOTE Flange connection and procedure 1) Cut the pipe using a pipe cutter. 7) Apply refrigerant oil on the inside and outside of the flared section. (Do not apply SUNISO oil) (Be careful to keep dust away) 2) The cut edge has burrs.
Page 89 SINGLE ZONE INSTALLATION 2. Guideline for each installation process Guideline for each installation process 2.2.3 Pipe connection flaring NOTE CAUTION 1. After installation completion make sure to open the Improper piping and flaring can lead to the leakage of valve. operating the unit with the valve shut off will refrigerant destroy the compressor (Refer to the Additional refrigerant charge detail information)
Page 90 SINGLE ZONE INSTALLATION 2. Guideline for each installation process Guideline for each installation process 2.2.4 Brazing work If brazing work is carried out without passing nitrogen gas CAUTION through the pipes then it allows the formation of oxidation bubbles on the inside surface of the pipes. Brazing of refrigerant piping : These oxidation bubbles are then carried along inside the The following precaution should be taken.
Page 91 SINGLE ZONE INSTALLATION 2. Guideline for each installation process Guideline for each installation process Brazing work should be carried out either downwards or sideways. An upward direction should be avoided wherever possible(to prevent leakage). over 10(3/8) mm(inch) over 10(3/8) mm(inch) (Expending pipe brazing) (Pipe brazing with socket) (Flare part brazing)
Page 92 SINGLE ZONE INSTALLATION 2. Guideline for each installation process Guideline for each installation process 2.2.5 Refrigerant pipe flushing Flushing is a method of cleaning extraneous matter out of pipes using pressurized gas. NOTE Refrigerant pipe flushing of 3 major effects 1.
Page 93 SINGLE ZONE INSTALLATION 2. Guideline for each installation process Guideline for each installation process 2.3 Drain piping work The purpose of drain piping is to prevent damage of products and ceiling materials by proper draining of dew condensation which is generated from the evaporator of indoor unit when the hot vapors come in contact with the evaporator. 1.
Page 94 SINGLE ZONE INSTALLATION 2. Guideline for each installation process Guideline for each installation process 2.3.1 Drain pipe slope and support • Slope gradient for drain should be 1/50~1/100 and PVC pipes should be used. • Support hanger should be at 1(3.28)~1.5(4.92) (m(ft)) interval to prevent from loosing and dropping. •...
Page 95 SINGLE ZONE INSTALLATION 2. Guideline for each installation process Guideline for each installation process 2.3.2 Drain pipe trap Models with drain pump: 300(11 13/16) or less PVC elbow Max. 800(31-1/2) Flexible hose Common drain pipe Drain pump [Unit : mm(inch)] Polyethylene insulation 10t PVC drain pipe Models without drain pump...
Page 96 SINGLE ZONE INSTALLATION 2. Guideline for each installation process Guideline for each installation process 2.3.3 Caution for drain piping work Notice on drain working 1. Drain pipe should be insulated all connected joints and ends. Sharp crook Sharp crook CAUTION Flexible tube should be connected with clamp concentrically.
Page 97 SINGLE ZONE INSTALLATION 2. Guideline for each installation process Guideline for each installation process Drain pipe insulation - Drain pipe should be insulated all connected joints and ends. Insulation Loose fitting Fitting insulation Insulation required wrong insulation not required - Do not use the loose fitting insulation. Drain water leakage test - Water leakage test should be performed 24 hours later after drain work finishing.
Page 98 SINGLE ZONE INSTALLATION 2. Guideline for each installation process Guideline for each installation process 2.4 Insulation work 2.4.1 Insulation 1) Operational steps EPDM length should be more Put the pipe in EPDM insulation Bond on both side of cut surfaces Dry it until it becomes thick, sticky longer than pipe length.
Page 99 SINGLE ZONE INSTALLATION 2. Guideline for each installation process Guideline for each installation process 2.4.2 Forming the piping 1) Form the piping by wrapping the connecting portion of the indoor unit with insulation material and secure it with two kinds of vinyl tape. •...
Page 100 SINGLE ZONE INSTALLATION 2. Guideline for each installation process Guideline for each installation process 2.4.3 Essential points of thermal insulation 1) Thermal insulation of refrigerant piping Be sure to give insulation work to refrigerant piping by covering liquid pipe and gas pipe separately with enough thickness heat-resistant insulation materials, so that no gap is observed in the joint between indoor unit and insulating material, and insulating materials themselves.
Page 101 SINGLE ZONE INSTALLATION 2. Guideline for each installation process Guideline for each installation process 3) Insulation tube thickness ① Thickness decision of insulation tube • Insulation material: EPDM or polyethylene foam • Thermal conductivity 0.035 kcal~0.040kcal/m·h°C(0.024~0.027Btu/ft·h℉) • Heat resistance = 212°F(Cooling only) or more 248°F(Heat pump) or over ②...
Page 102 SINGLE ZONE INSTALLATION 2. Guideline for each installation process Guideline for each installation process 2.5 Electrical work 2.5.1 Precautions CAUTION When knocking out knock holes • To punch a knock hole, hit on it with a hammer. • After knocking out the holes, we recommend you paint the edges and areas around the edges using paint to prevent rusting.
Page 103 SINGLE ZONE INSTALLATION 2. Guideline for each installation process Guideline for each installation process • Use only copper wires. • Make sure to shut down the power before starting the electric wiring work. Do not set ON any switch until the work is completed. •...
Page 104 SINGLE ZONE INSTALLATION 2. Guideline for each installation process Guideline for each installation process 2.5.2 Control wiring / power supply 1) All wiring must comply with LOCAL REGULATIONS. 2) Select a power source that is capable of supplying the current as required by the air conditioner. 3) Feed the power source to the unit via a distribution switch board designed for this purpose.
Page 105 SINGLE ZONE INSTALLATION 2. Guideline for each installation process Guideline for each installation process Connecting the cable to Outdoor Unit • Remove the side panel for wiring connection. • Use the cord clamp to fix the cord. • Earthing work - Case 1 :Terminal block of Outdoor Unit have mark.
Page 106 SINGLE ZONE INSTALLATION 2. Guideline for each installation process Guideline for each installation process 2.6 Leakage test 2.6.1 Leakage test Indoor unit Air and moisture remaining in the refrigerant system have undesirable effects as indicated below. ① Pressure in the system rises. ②...
Page 107 SINGLE ZONE INSTALLATION 2. Guideline for each installation process Guideline for each installation process 2.6.2 Essential points of testing The key to successful testing is strict adherence to the following procedure: a) The liquid and gas piping in each refrigerant system should be pressurized in turn in accordance with the following steps.
Page 108 SINGLE ZONE INSTALLATION 2. Guideline for each installation process Guideline for each installation process 2.6.3 Checking for leakage [Check 1] (Where pressure falls while carrying out Steps 1 to 3 described on previous page) ▶ Check by measure gage..gas detector. ▶...
Page 109 SINGLE ZONE INSTALLATION 2. Guideline for each installation process Guideline for each installation process 2.7 Vacuum drying works 2.7.1 What is Vacuum drying? Vacuum drying is : The use of a vacuum pump to vaporize(gasify) the moisture (liquid) inside the pipe and expel it leaving the pipes completely dry inside.
Page 110 SINGLE ZONE INSTALLATION 2. Guideline for each installation process Guideline for each installation process 2.7.2 Evacuation 1. Connect the manifold hose end described in the preceding steps to the vacuum pump to evacuate the tubing and indoor unit. Confirm the "Lo" knob of the manifold valve is open. Then, run the vacuum pump. The operation time for evacuation varies with tubing length and capacity of the pump.
Page 111 SINGLE ZONE INSTALLATION 2. Guideline for each installation process Guideline for each installation process 2.7.3 Choosing a vacuum pump The necessity for counter flow prevention After the vacuum process of the refrigerant cycle, the inside of the hose will be vacuumed after stopping the vacuum pump, the oil of vacuum pump may flow back.
Page 112 SINGLE ZONE INSTALLATION 2. Guideline for each installation process Guideline for each installation process 2) Vacuum pump maintenance Because of their nature, most vacuum pumps contain large amounts of oil which lubricates bearings, etc., and functions to enhance airtightness of pistons. When using a vacuum pump to discharge air from refrigerant piping, moisture in the air tends to get mixed in with the oil.
Page 113 SINGLE ZONE INSTALLATION 2. Guideline for each installation process Guideline for each installation process 2.7.4 Vacuum drying procedure There are two vacuum drying methods and the appropriate one should always be chosen to confirm with individual local conditions. [Normal vacuum drying]..The standard method [Operational steps] 1.
Page 114 SINGLE ZONE INSTALLATION 2. Guideline for each installation process Guideline for each installation process 2.8 Additional charge of refrigerant 2.8.1 Refrigerant charging instructions Refrigerant charging 1. The results of all calculations must be recorded. (make a list) 2. The refrigerant will need to be additionally charged when the distance between the outdoor Unit and the most distant indoor unit is more than length (refer to section 8 outdoor unit installation condition) 3.
Page 115 SINGLE ZONE INSTALLATION 2. Guideline for each installation process Guideline for each installation process 2.9 Trial test run operation 2.9.1 Test run procedure Check the following before turning power on Wrong power wiring , loosed screws Wrong control transmission wiring , loose screws Piping size , presence of thermal insulation Use a mega-tester Measurement of main power circuit insulation...
Page 116 SINGLE ZONE INSTALLATION 2. Guideline for each installation process Guideline for each installation process 2.9.3 Transfer to customer with explanation 1. Operational step Make final report Explain how to Hand over Complete test run (test run operate and relevant printed inspection sheet) maintain equipment materials...
Page 117: Indoor Unit Ceiling Cassette
SINGLE ZONE 3. Installation of indoor unit INSTALLATION 3.1 Ceiling cassette 4-way Indoor Unit Ceiling Cassette • Please read the instruction sheets completely before installing the product. • When the power cord is damaged, replacement work shall be performed by authorized personnel only. •...
Page 118 SINGLE ZONE INSTALLATION 3. Installation of indoor unit Indoor Unit Ceiling Cassette 3.1.2 Selection of the best location 3.1.3 Precautions regarding cassette indoor unit installation • There should not be any heat source or steam near the unit. • There should not be any obstacles to the air circulation. 1) Main points about the indoor installation •...
Page 119 SINGLE ZONE INSTALLATION 3. Installation of indoor unit Indoor Unit Ceiling Cassette • Countermeasure: • In case of the multi flow type, use the high humidity kit. Otherwise the dew drops can be seen in the unit body. - Use the carpet on the floor (compared to the tiles the car- pet over it will have a 3 degree rise in temperature) •...
Page 120 INSTALLATION Indoor Unit Ceiling Cassette SINGLE ZONE 3. Installation of indoor unit 3.1.4 Ceiling opening dimensions and 1) Install the suspension bolts. hanging bolt location (Use either a W3/8” or M10 size bolt) Use a hole-in anchor for existing ceilings, and a sunken insert, sunken ①...
Page 121 INSTALLATION SINGLE ZONE Indoor Unit Ceiling Cassette 3. Installation of indoor unit 3.1.5 Indoor unit installation < Ceiling work > (2) Adjust the unit to the right position for installation. • Installing of the accessories (except for the decoration (3) Assure that the unit is horizontal. panel) before installing the indoor unit is easier.
Page 122 SINGLE ZONE INSTALLATION 3. Installation of indoor unit Indoor Unit Ceiling Cassette • TP/TM Chassis 3) Indoor unit drain piping • Drain piping must have downward (1/50 to 1/100): be sure The decoration panel has its installation not to provide up-and-down slope to prevent reverse flow. direction.
Page 123 SINGLE ZONE INSTALLATION 3. Installation of indoor unit Indoor Unit Ceiling Cassette 2) Wiring Connection CAUTION ① Open the control box cover and connect the Remote Install certainly the decoration panel. controller cord and Indoor power wires. Cool air leakage causes sweating. ‘...
Page 124 SINGLE ZONE INSTALLATION 3. Installation of indoor unit Indoor Unit Ceiling Cassette 3. Do not connect wires of different gauge to the WARNING same grounding terminal. Loose connection may deteriorate protection. • Make sure that the screws of the terminal are not loose. 4.
Page 125: Indoor Unit Ceiling Concealed Duct
SINGLE ZONE INSTALLATION 3. Installation of indoor unit Indoor Unit Ceiling Concealed Duct 3.2 Ceiling Concealed Duct (High Static) • Please read this instruction sheet completely before installing the product. • When the power cord is damaged, replacement work shall be performed by authorized personnel only. •...
Page 126 SINGLE ZONE INSTALLATION 3. Installation of indoor unit Indoor Unit Celing Concealed Duct 3.2.2 Ceiling dimension and hanging bolt location n Installation of Unit BG/BR Chassis Install the unit above the ceiling correctly. CASE 1 POSITION OF SUSPENSION BOLT • Apply a joint-canvas between the unit and duct to absorb unnecessary vibration.
Page 127 SINGLE ZONE INSTALLATION 3. Installation of indoor unit Indoor Unit Celing Concealed Duct NOTE • Throughly study the following installation locations: 1. In such places as restaurants and kitchens, considerable amount of oil steam and flour adhere to the fan, the fin of the heat exchanger, resulting in heat exchange reduction, spraying, dispersing of water drops, etc.
Page 128 SINGLE ZONE INSTALLATION 3. Installation of indoor unit Indoor Unit Celing Concealed Duct Connection method of the connecting cable(Example) Lock nut 1(L1) 2(L2) 3(A) 4(B) Conduit Conduit mounting plate Power Supply Transmission High Voltage (208/230V) WARNING • Loose wiring may cause the terminal to overheat or result in unit malfunction. A fire hazzard may also exist.
Page 129 SINGLE ZONE INSTALLATION 3. Installation of indoor unit Indoor Unit Celing Concealed Duct THERMAL INSULATION All thermal insulation must comply with local requirement. INDOOR UNIT BG/BR Chassis Union for liquid pipe Thermal insulator for refrigerant pipe (Local supply) Thermal insulator for Refrigerant pipe and thermal piping(Local supply) insulator(Local supply)
Page 130 SINGLE ZONE INSTALLATION 3. Installation of indoor unit Indoor Unit Celing Concealed Duct 3.2.5 Indoor Unit Drain Piping Upward • Drain piping must have down-slope (1/50 to 1/100): be sure not Pipe clamp routing to provide up-and-down slope to prevent reversal flow. not allowed •...
Page 131 SINGLE ZONE INSTALLATION 4. Installation of outdoor unit Indoor Unit Celing Concealed Duct 4.1 Safety Precautions Please strictly follow the instructions given in the Installation manual .Improper installation by ignoring the instructions can lead to damage to life and property. Make sure to read the following safety instructions very carefully and throughly .
Page 132 SINGLE ZONE INSTALLATION 4. Installation of outdoor unit Indoor Unit Celing Concealed Duct Be sure to use only those parts which are listed in the svc parts list. Never attempt to modify the equipment. • The use of inappropriate parts can cause an electrical shock, excessive heat generation or fire. Indoor/outdoor wiring connections must be secured tightly and the cable should be routed properly so that there is no force pulling the cable at the connection terminals.
Page 133 SINGLE ZONE INSTALLATION 4. Installation of outdoor unit Indoor Unit Celing Concealed Duct CAUTION Use two or more people to lift and transport the product. • Avoid personal injury. Do not install the product where it will be exposed to sea wind (salt spray) directly. •...
Page 134 SINGLE ZONE INSTALLATION 4. Installation of outdoor unit Indoor Unit Celing Concealed Duct 4.1.1 Points for explanation about operations The items with WARNING and CAUTION marks in the operation manual are the items pertaining to possibillties for bodily injury and material damage in addition to the general usage of the product. Accordingly, it is necessary that you make a full explanation about the described contents and also ask your customers to read the operation manual.
Page 135 SINGLE ZONE INSTALLATION 4. Installation of outdoor unit Indoor Unit Celing Concealed Duct 4.1.4 For the following items, take special care during construction and check after installation is finished 1. Items to be checked after completion of work Unit Items to be checked If not properly done, what is likely to occur Check Are the indoor and outdoor unit fixed firmly?
Page 136 SINGLE ZONE INSTALLATION 4. Installation of outdoor unit Indoor Unit Celing Concealed Duct 4.2 Introduction This installation guidance describes the procedures for outdoor unit installation, piping, wiring, and control between outdoor units, indoor units and controller. Installation of the indoor units is not described in this part. Please refer to the installation guidance manual which supplied with indoor units for their respective installation.
Page 137: Installation Of Oudoor Unit
SINGLE ZONE INSTALLATION 4. Installation of outdoor unit Installation of Oudoor unit 4.3 Foundation SINGLE ZONE For good drain of outdoor unit, keep the bottom height from icing upward. MR24UY3J <Basic intensity> Bolt Factor M10-J type Concrete height 200(7-7/8)mm(inch) or more Bolt inserted depth 70(2-25/32)mm(inch) or more MR36UY3J...
Page 138 SINGLE ZONE INSTALLATION 4. Installation of outdoor unit Installation of Oudoor unit 4.4 Settlement of the outdoor unit • Anchor the outdoor unit with a bolt and nut tightly and horizontally on a concrete or rigid mount. • When installing on the wall, roof or rooftop, anchor the mounting base securely with a nail or wire assuming the influence of wind and earthquake.
Page 139 SINGLE ZONE INSTALLATION 4. Installation of outdoor unit Installation of Oudoor unit 4.5 Selection of the best location This SINGLE ZONE unit is suitable for installation in a residential and commercial environmental situation. If installed near a household appliance it can cause electromagnetic interference. The units should be installed in a location that meets the following requirements: 1.
Page 140 SINGLE ZONE INSTALLATION 4. Installation of outdoor unit Installation of Oudoor unit 4.6 Clearance space 4.6.1 Clearance around outdoor unit SINGLE ZONE 300(11-13/16) 300(11-13/16) or more or more 300(11-13/16) 300(11-13/16) 300(11-13/16) 300(11-13/16) or more or more or more or more •...
Page 141 SINGLE ZONE INSTALLATION 4. Installation of outdoor unit Installation of Oudoor unit Clearance of side discharge unit [Unit:mm(inch)] 1) Where there is an obstacle on the air intake side: n No obstacle above • Obstacle on the suction side only •...
Page 142 SINGLE ZONE INSTALLATION 4. Installation of outdoor unit Installation of Oudoor unit n Where the obstacles on the discharge side is lower than the unit: • No obstacle above • Obstacle above, too ʻLʼ should be lower than ʻHʼ. Close the bottom of the installation frame to prevent the discharged air from being bypassed.
Page 143 SINGLE ZONE INSTALLATION 4. Installation of outdoor unit Installation of Oudoor unit 4.7 Outdoor unit piping 4.7.1 Outdoor unit piping Required tools Torque Wrench Screw Driver Drill M/C f 3.5/F14.5 Measuring Tape, Blade Core drill Spanner Hexagonal wrench(4mm, 5mm) Hook Meter Multi Tester Flare Set Soap Foam...
Page 144 SINGLE ZONE INSTALLATION 4. Installation of outdoor unit Installation of Oudoor unit 4.8 Outdoor unit installation requirments 4.8.1 Piping elevation and length Pipe Size Length A Elevation *Additional Unit : mm(inch) Unit : [m(ft)] Unit : [m(ft)] refrigerant Capacity Unit: g/m(oz/ft) Liquid Standard Max.
Page 145 SINGLE ZONE INSTALLATION 4. Installation of outdoor unit Installation of Oudoor unit 4.9 Outdoor unit cabin 4.9.1 Outdoor Cabin louver requirement 1. Outdoor cabin type : Manual door open type Max15 (Recommended) 2. Louver angle : less than 15° on the horizontal base 3.
Page 146: Ventilation Kit
1. Safety Precautions INSTALLATION 1. Safety Precautions Ventilation Kit Safety Precautions To prevent injury to the user or other people and property damage, the following instructions must be followed. n Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the following indications.
Page 147: Included Items
2. Included Items INSTALLATION 2. Included Items Ventilation Kit ※ Provided by LG. Included Items DVKA Item ¿ Ventilation kit ¡ Bolt ¬ Bolt √ Insulation Q’ty ¿ ¡ ¬ √ Figure DVKB Item Flange Screw Q’ty ƒ ≈ Figure M4 x 10...
Page 148: Assembly Diagram
3. Assembly Diagram INSTALLATION 3. Assembly Diagram Ventilation Kit Assembly Diagram Installation Manual 5...
Page 149: Ventilation Kit Installation (Dvka)
INSTALLATION Ventilation Kit 4. Ventilation Kit Installation (DVKA) Ventilation Kit Installation (DVKA) 4. Ventilation Kit Installation (DVKA) 4.1 Cut the styrofoam's groove for ventilation kit(¿) 4-1 and 4-2 are intended to obtain the air inflow path for ventilation. Caution If not used, do not cut the styrofoam. 4.2 Trim the cutting surface Cutting Surface...
Page 150: Flange Installation (Dvkb)
5. Flange Installation (DVKB) INSTALLATION 5. Flange Installation (DVKB) Ventilation Kit Flange Installation (DVKB) 5-1. Use screws (≈) to fix 3 points on the side of the flange (ƒ). Flange 5 Screw 6 5-2. Use screws (≈) to fix 4 points on the upper surface of the flange (ƒ). Screw 6 Flange 5...
Page 151 INSTALLATION 5. Flange Installation (DVKB) Ventilation Kit Flange Installation (DVKB) 5-3. Remove four screws which bond drain pan. Indoor Drain pan X bond screw Drain pan 5-4. Attach ventilation kit (¿) to air conditoner with bolt (¡) Indoor Bolt( 2 ) Ventilation Kit ( 1 )
Page 152: Front Panel Installation
6. Front Panel Installation INSTALLATION 6. Front Panel Installation Ventilation Kit Front Panel Installation ※ Part of this instruction is the same as the installation manual. 6-1. Disassemble the front panel packing and remove the front grill and checking edge cover from the front panel.
Page 153 INSTALLATION Ventilation Kit 6. Front Panel Installation Front Panel Installation 6-2. Attach the front panel to the assembly(¿ + ƒ + ≈ + indoor unit) and use bolt(¡) to fix both the front panel and the assembly to the indoor unit. When attaching, get the bracket of the front panel to the hanger of the ventilation kit(¿).[Fig.2] Be sure to assemble the bolts tightly, so that they are tightened to the upper part of the indoor unit.
Page 154 INSTALLATION 6. Front Panel Installation Ventilation Kit Front Panel Installation 6-3. Close the checking edge. 6-4. Loosen 2 screws and open the cover of the control box. Screw point Screw 6-5. Connect 1 display connector connected to the front panel and 2 wind direction adjusters to the specified area of the indoor unit PCB.
Page 155 INSTALLATION Ventilation Kit 6. Front Panel Installation Front Panel Installation Ø5.9 Supplies ¿Ventilation Kit (DVKA) ¡Ventilation Kit connection flange (DVKB) Purchased ¬Duct √Hood ƒFilter ≈Fan motor items 1. Ventilation duct(¬) Diameter, Ø5.9 inch and length, 4 m is the requirement and middle duct bending should be less than once.
Page 156: Electrical Wiring To The Indoor Unit
INSTALLATION Ventilation Kit Electrical Wiring To The Indoor Unit 7. Electrical Wiring To The Indoor Unit Case I . Acceptable Case II . Not acceptable Room1 Room1 Indoor Unit 1 Indoor Outside Outside Unit 1 Indoor Unit 2 Unit Room2 Room2 Indoor Indoor...
Page 157: Repair
Part 4 Trouble Shooting REPAIR 1. 2-Way, 3-Way Valve 2-Way, 3-Way Valve 2-way Valve (Liquid Side) 3-way Valve (Gas Side) Valve cap Hexagonal wrench (4mm) Open position Flare nut Flare nut Closed position Open position Closed position piping piping Service Service connection connection...
Page 158 Part 4 Trouble Shooting REPAIR 2. Pumping Down Pumping Down Liquid side Indoor unit Outdoor unit Open 2-Way valve Gas side Closed 3-Way valve CLOSE CLOSE Purge the air • Procedure (6) Operate the air conditioner at the cooling (1) Confirm that both the 2-way and 3-way valves cycle and stop it when the gauge indicates are set to the open position.
Page 159: Evacuation (All Amount Of Refrigerant Leaked)
Part 4 Trouble Shooting REPAIR 3. Evacuation (All amount of refrigerant leaked) Evacuation (All amount of refrigerant leaked) Liquid side Indoor unit Outdoor unit 3-Way valve Open Gas side 3-Way valve Open Vacuum pump Vacuum Gage OPEN OPEN • Procedure (1) Connect the vacuum pump to the center hose (3) Close the valve (Lo side) on the charge set, of charge set center hose...
Page 160: Gas Charging (After Evacuation)
Part 4 Trouble Shooting REPAIR 4. Gas Charging (After Evacuation) Gas Charging (After Evacuation) Liquid side Indoor unit Open Outdoor unit 3-Way valve Gas side Open 3-Way valve Check valve Charging cylinder Vacuum Gage OPEN CLOSE • Procedure This is different from previous procedures. (1) Connect the charge hose to the charging Because you are charging with liquid refrigerant cylinder.
Page 161: Components Testing
COMPONENTS TESTING Circuit Board Diagram Ceiling Cassette 4-way SW01 CN_OPTION CN_MOTOR CN_FLOAT CN_DISPLAY CN_ROOM CN_PIPE/IN CN_PIPE/OUT CN_D/PUMP CN_VANE2 CN_VANE1 CN_REMO CN_POWER Circuit Board Diagram Figure 601...
Page 162: Ceiling Concealed Duct (High Static) 24K
COMPONENTS TESTING Circuit Board Diagram Ceiling Concealed Duct (High Static) 24k CN-ZONE CN-EXT CN-FLOAT CN-MOTOR1 CN-DISPLAY CN-CC CN-VM CN-POWER CN-ROOM CN-REMO CN-D/PUMP CN-PIPE/IN CN-PIPE/OUT Circuit Board Diagram Figure 602...
Page 163: Ceiling Concealed Duct (High Static) 36K
COMPONENTS TESTING Circuit Board Diagram Ceiling Concealed Duct (High Static) 36k CN-MOTOR2 CN-ZONE CN-FLOAT CN-EXT CN-MOTOR1 CN-DISPLAY CN-CC CN-POWER CN-ROOM CN-REMO CN-D/PUMP CN-PIPE/IN CN-PIPE/OUT CN-MOTOR1(IN) CN-MOTOR2(IN) CN-MOTOR1 CN-MOTOR2 CN-VM(IN) Circuit Board Diagram Figure 603...
Page 164: Outdoor 24K
COMPONENTS TESTING Circuit Board Diagram Outdoor 24k MAIN PCB CN-TH4 CN_PFC_OUT CN-TH3 CN_PFC_IN CN-4WAY CN-TH2 CN-FlasH CN-MOTOR1 CN-CENTRAL CN-CP(N) CN-CP(L) CN-LGMV CN-TH5 CN-EEV1 CN-COM Circuit Board Diagram Figure 604...
Page 165: Outdoor 36K
COMPONENTS TESTING Circuit Board Diagram Outdoor 36k MAIN PCB CN_MOTOR1 CN_MOTOR2 CN_N/F CN_EEV1 CN_4WAY CN_COOLING CN_TH2 CN_TH3 P_SENSOR (H)-RD CN_TH4 Circuit Board Diagram Figure 605...
Page 166: Branch Diagram - Cassette
COMPONENTS TESTING Single Branch Duct _ Single Zone Branch Diagram - Cassette Single Branch Duct _ Single Zone Single Zone Ceiling Cassette – 24/36k Btu Side Branch Duct - ① Side Branch Duct - ② Q (CFM) Q (CFM) Side Branch Duct - ③ Side Branch Duct - ④...
Page 167: Ducting "2" Side Branches _ Single Zone
COMPONENTS TESTING Branch Diagram - Cassette Ducting "2" side branches _ Single Zone Ducting “2” side branches _ Single Zone Single Zone Ceiling Cassette – 24/36K Btu Two Side Branch Ducts - ② & ④ Two Side Branch Ducts - ① & ④, ③ & ④ 1000 1000 Q (CFM)
Page 168: Setting Vane Angle Using Dwc1
COMPONENTS TESTING Setting Vane angle using DWC1 Branch Diagram - Cassette Setting Vane angle using DWC1 Function Setting - Vane Angle Control This function is to adjust airflow angle. Repeat pressing button until icon flash. Press button to select active vane : 1 / 2 / 3 / 4 / All / Standard Select Vane number using buttons.
Page 169 COMPONENTS TESTING Branch Diagram - Cassette Setting Vane angle using DWC1 Setting Vane Angle using DWC1 Once Vane is set vane will not close 100%. To ensure air is redirected please block off entire discharge vane. Using Foil tape or colored Duct tape.
Page 170: Mc24Y3J- Branch Duct Dimensions
COMPONENTS TESTING Branch Diagram - Cassette MC24Y3J- Branch Duct Dimensions MC24Y3J- Branch Duct Dimensions...
Page 171: Mc36Y3J- Branch Duct Dimensions
COMPONENTS TESTING Branch Diagram - Cassette MC36Y3J- Branch Duct Dimensions MC36Y3J- Branch Duct Dimensions...
Page 172: Troubleshooting
TROUBLESHOOTING Part 3 Test Run Test Run 1. Check before Test Run Check Before Test Run Check to see whether there is any refrigerant leakage, and check whether the power or transmission cable is connected properly. NOTE: Check that there should be no disconnection when all pins and wires are pulled by hands. Check whether the liquid pipe and gas pipe valves are fully opened.
Page 173: Test Run Flow Chart
TROUBLESHOOTING Part 3 Test Run Test Run 2. Test Run Flow chart Test Run Flow Chart START Test operation for indoor unit Operate the unit in cooling mode. Refer to part4, 6 Electric part Does Test operation start? Is cold air discharged for more than 3 minutes ? Refer to part4, 5 Cycle part Is there any temperature...
Page 174: Test Run Detail
TROUBLESHOOTING Part 3 Test Run Test Run 3. Test Run Detail Test Run Detail 1. Check that all tubing and wiring have been properly con- NOTE: If the actual pressure is higher than shown, the nected. system is most likely over-charged, and charge should be removed.
Page 175: Cycle Troubleshooting Guidetest Run Detail
Part 4 Trouble Shooting TROUBLESHOOTING 5. Cycle Troubleshooting Guide Cycle Troubleshooting GuideTest Run Detail Problem Possible causes Corrective action Error Code • There is a burning smell and a strange sound coming from the unit. • Water leaks from the indoor unit even when the humidity level is low.
Page 176 TROUBLESHOOTING Part 4 Trouble Shooting Cycle Troubleshooting GuideTest Run Detail Problem Possible causes Corrective action Error Code • Air is not circulatingprop- • Make sure that there are no curtains, blinds or fur- erly. niture blocking the front of the air conditioner. •...
Page 177 TROUBLESHOOTING Part 4 Trouble Shooting Cycle Troubleshooting GuideTest Run Detail Problem Possible causes Corrective action Error Code • The connection of the indoor and • Conduct the wiring and piping error 05, 09, 53 outdoor units has a problem. check. The air condi- 09, 32, 41, tioner stops...
Page 178: Electronic Parts Troubleshooting Guide
Part 4 Trouble Shooting TROUBLESHOOTING 6. Electronic Parts Troubleshooting Guide Electronic Parts Troubleshooting Guide The Product doesn’t operate at all. (9~36kBtu/h Model) Trouble 1 Turn off the main power and wait until LED on outdoor PCB is off. Turn on the main power again. Does "Beeping"...
Page 179 TROUBLESHOOTING Part 4 Trouble Shooting Electronic Parts Troubleshooting Guide Product doesn't operate with the remote controller. Trouble 2 Turn on main power. While the compressor has been stopped, the compressor does not operate owing to the delaying function for 2 minutes after stopped. When the compressor stopped Indoor Fan is driven by a low speed.
Page 180 TROUBLESHOOTING Part 4 Trouble Shooting Electronic Parts Troubleshooting Guide Trouble 3 The Compressor/Outdoor Fan don't operate Turn on the main power. Operate Cooling Mode by setting the desired temperature of the remote controller is less than one of the Indoor temperature by 1°C at least. When in air circulation mode, compressor/outdoor fan is stopped.
Page 181 TROUBLESHOOTING Part 4 Trouble Shooting Electronic Parts Troubleshooting Guide Trouble 4 When indoor Fan does not operate Turn off main power. Check the connection of CN-FAN. Check the Fan Motor. Check the Fuse(AC250V, T2A). Check the related circuit of indoor Fan Motor. •...
Page 182: Self-Diagnosis Function
Part 4 Trouble Shooting TROUBLESHOOTING 7. Self-diagnosis Function Self-diagnosis Function n Error Indicator • The function is to self-diagnosis airconditioner and express the troubles identically if there is any trouble. • If more than two troubles occur simultaneously, primarily the highest trouble of error code is expressed. •...
Page 183 TROUBLESHOOTING Part 4 Trouble Shooting Self-diagnosis Function n Outdoor Unit Error 1) 2 LED Type LED1 (Green, 1 Digit) LED2 (Red, 10 Digit) Error Indication Error Indoor Unit Outdoor Unit Description Code LED2 LED1 Green DC Peak (IPM Fault) 2 Times 1 Time 2 Times 1 Time...
Page 184 TROUBLESHOOTING Part 4 Trouble Shooting Self-diagnosis Function 2) 1 LED Type Ex) Error Code 21 (DC Peak) Red LED 1sec 1sec 1sec 1sec 2sec 2sec 2sec 2sec Error Indication Error Indoor Unit Outdoor Unit Description Code LED2 LED1 DC Peak (IPM Fault) 2 Times 1 Time 2 Times...
Page 185: Troubleshooting Guide (Indoor Unit)
TROUBLESHOOTING Part 4 Trouble Shooting n Troubleshooting Guide (Indoor Unit) Troubleshooting Guide (Indoor Unit) - 35 -...
Page 186 TROUBLESHOOTING Check Points Part 4 Trouble Shooting Check Method Measure resistance Check Point Refer to Check Point 1. 10k Ω / at 25℃(77℉)±10% Resistance is adequate? 2. 5k Ω / at 25℃(77℉)±10% 3. 200k Ω / at 25℃(77℉)±10% Sensor OK Replace Sensor ❏...
Page 187 TROUBLESHOOTING Check Points Resistance - Temp. Sensor Table Part 4 Trouble Shooting Resistance - Temp. Sensor Table Resistance(KΩ) Temp (℃/℉) Air Sensor s-Pipe Sensor D-Pipe Sensor -30/-22 204.35 102.17 -25/-13 146.97 73.49 -20/-4 107.09 53.55 -15/5 3950 -10/14 58.95 29.48 -5/23 44.47 22.24...
Page 188: Check Points
TROUBLESHOOTING Check Points CH04 - Float Switch Part 4 Trouble Shooting Inspection Description of Cause of Error Check Point Number Inspection • Float switch open. • The connection of wire (Float switch) CH04 Float switch (Normal : short) • Indoor unit installation. (Inclination) •...
Page 189: Ch05 - Poor Comunication (Indoor<-> Outdoor Unit)
TROUBLESHOOTING Check Points Part 4 Trouble Shooting CH05 - Poor Comunication (Indoor<-> Outdoor Unit) (verify with hands) (verify with hands)
Page 190: Ch10 - Fan Locking
TROUBLESHOOTING Check Points Part 4 Trouble Shooting CH10 - Fan Locking • Verify with hands certainly • Connect (pulling by hand to check certainly connection status) • Verify with hands certainly • Repair or replace the (pulling by hand to check connection status) harness.
Page 191 TROUBLESHOOTING Check Points Part 4 Trouble Shooting n Trouble Shooting Guide Model P/No_FRD Applied Controller MR09C1J 67603941 Gen2 1.5kW 115V MR12C1J 67603943 Gen2 1.5kW 115V MR18C3J 67603946 Gen2 3.0kW MR24C3J 67603950 Gen2 4.0kW MR09Y3J 67603936 Gen2 1.5kW MR12Y3J 67603938 Gen2 1.5kW MR18Y3J 67603946 Gen2 3.0kW...
Page 192: 1) Ch21: Dc Peak Error
TROUBLESHOOTING Check Points Part 4 Trouble Shooting CH 21: DC Peak Error 1) CH21: DC Peak Error caution Check that whether the housings and harness would be separated by pulling those with hands directly. • Check if the input voltage is within AC 190 ~ 260 V Is the input voltage (In case of 115V Model : 95~130V)
Page 193 TROUBLESHOOTING Check Points Part 4 Trouble Shooting CH 21: DC Peak Error • Verifying compressor burn - How to measure the resistance between the lines of each terminal Table 1 Resistance between the lines of each terminal U - W 0.5 ~ 1.5 Ω...
Page 194 TROUBLESHOOTING Check Points Part 4 Trouble Shooting CH 21: DC Peak Error Case of field defect ❏ IPM (Over Current Limit) ❏ Bending/Folding ❏ SVC Valve close...
Page 195: 22: Ct2 Error (Input Over-Current)
TROUBLESHOOTING Part 4 Trouble Shooting Check Points 2) CH22: CT2 Error (Input Over-current) CH 22: CT2 Error (Input Over-Current) caution Check that whether the housings and harness would be separated by pulling those with hands directly. (In case of 115V Model : 95~130V) DC 0 V or 2.5 ±...
Page 196 TROUBLESHOOTING Check Points Part 4 Trouble Shooting CH 22: CT2 Error (Input Over-Current) Case of field defect ❏ Blocked Indoor unit ❏ Bending/Folding ❏ SVC Valve close - 46 -...
Page 197: Ch23: Dc Link Low Voltage Error
TROUBLESHOOTING Part 4 Trouble Shooting Check Points 3) CH23: DC Link Low Voltage Error CH23: DC Link Low Voltage Error DC Link voltage is lower / higher than the limit. (Under DC 140Vrms) (In case of 115V Model : 95~130V) DC 2.3 ~ 2.7 V DC 2.3 ~ 2.7 V...
Page 198 TROUBLESHOOTING Check Points Part 4 Trouble Shooting CH23: DC Link Low Voltage Error Case of field defect ❏ Voltage drop or rising ❏ Check if reactor wire is connected - 48 -...
Page 199: Ch26: Dc Comp Position Error
TROUBLESHOOTING Part 4 Trouble Shooting Check Points 4) CH26: DC Comp Position Error CH26: DC Comp Position Error caution Check that whether the housings and harness would be separated by pulling those with hands directly. • Check if the input voltage is within AC Is the input voltage 190 ~ 260 V normal?
Page 200 TROUBLESHOOTING Check Points Part 4 Trouble Shooting CH26: DC Comp Position Error Case of field defect ❏ Compressor connection faulty - 50 -...
Page 201: Ch27: Psc Fault Over-Current Error
TROUBLESHOOTING Part 4 Trouble Shooting Check Points 5) CH27: PSC Fault Over-current Error CH27: PSC Fault Over-current Error caution Check that whether the housings and harness would be separated by pulling those with hands directly.
Page 202: Ch29: Compressor Phase Over-Current Error (Only Verifiable At Outdoor Unit Pcb Assembly)
TROUBLESHOOTING Part 4 Trouble Shooting Check Points 6) CH29: Compressor phase Over-current Error (only verifiable at Outdoor unit PCB Assembly) CH29: Compressor phase Over-current Error (only verifiable at Outdoor unit PCB Assembly) caution Check that whether the housings and harness would be separated by pulling those with hands directly. * Power-on standby state : Apply the power →...
Page 203: Ch32: Inverter Compressor D-Pipe Overheat Error
TROUBLESHOOTING Part 4 Trouble Shooting Check Points 7) CH32: Inverter Compressor D-Pipe Overheat Error CH32: Inverter Compressor D-Pipe Overheat Error caution Check that whether the housings and harness would be separated by pulling those with hands directly. This step is performed only for EEV model. - 53 -...
Page 204: Ch40: Ct Sensor Error (Open/Short)
TROUBLESHOOTING Part 4 Trouble Shooting Check Points 8) CH40: CT Sensor Error (Open/Short) CH40: CT Sensor Error (Open/Short) Tester Tester * Power-on standby state : Apply the power → Turn off indoor unit (Power applied at unit with no functions active) - 54 -...
Page 205: Ch41/44/45/65: Inv D-Pipe/Outdoor Inlet/Cond. Pipe/Heat Sink Sensor Error
TROUBLESHOOTING Part 4 Trouble Shooting Check Points 9) CH41/44/45/65: Inv D-Pipe/Outdoor Inlet/Cond. Pipe/Heat sink Sensor Error CH41/44/45/65: Inv D-Pipe/Outdoor Inlet/Cond. Pipe/Heat sink Sensor Error - 55 -...
Page 206 TROUBLESHOOTING Part 4 Trouble Shooting Check Points 10) CH53: Outdoor Unit <-> Indoor Unit Communication Error CH53: Outdoor Unit <-> Indoor Unit Communication Error Is the • Check if the communication circuit DC communication voltage voltage is 68 ~ 76 V normal? - 56 -...
Page 207: Ch53: Outdoor Unit <-> Indoor Unit Communication Error
TROUBLESHOOTING Check Points Part 4 Trouble Shooting CH53: Outdoor Unit <-> Indoor Unit Communication Error • Inspecting the communication circuit DC voltage...
Page 208 TROUBLESHOOTING Check Points Part 4 Trouble Shooting CH53: Outdoor Unit <-> Indoor Unit Communication Error Case of field defect ❏ Wrong wiring for connecting wire L-N ❏ Poor wiring...
Page 209 TROUBLESHOOTING Part 4 Trouble Shooting Check Points 11) CH60: Outdoor Unit PCB EEPROM Error CH60: Outdoor Unit PCB EEPROM Error • Check if the input voltage is within AC 190 ~ 260 V Is the input voltage (In case of 115V Model : 95~130V) normal? •...
Page 210: Ch60: Outdoor Unit Pcb Eeprom Error
TROUBLESHOOTING Check Points Part 4 Trouble Shooting CH60: Outdoor Unit PCB EEPROM Error Case of field defect ❏ Empty EEPROM ❏ Faulty EEPROM insertion...
Page 211: 12) Ch62/65: Heat Sink Error
TROUBLESHOOTING Part 4 Trouble Shooting Check Points 12) CH62/65: Heat Sink Error CH62/65: Heat Sink Error CH62/ CH65 • Check if the input voltage is within AC 190 ~ 260 V Is the input voltage (In case of 115V Model : 95~130V) normal? •...
Page 212 TROUBLESHOOTING Check Points Part 4 Trouble Shooting CH62/65: Heat Sink Error Case of field defect ❏ Blocked Indoor unit ❏ Bending/Folding ❏ SVC Valve close - 62 -...
Page 213 TROUBLESHOOTING Part 4 Trouble Shooting Check Points 13) CH67: Outdoor BLDC Fan Lock Error CH67: Outdoor BLDC Fan Lock Error Case of field defect ❏ BLDC Fan Motor (short) - 63 -...
Page 214: Ceiling Cassette
TROUBLESHOOTING Ceiling Cassette Installer Setting Mode Installer Setting - How to enter installer setting mode CAUTION Installer setting mode is to set the detail function of the remote controller. If the installer setting mode is not set correctly, it can cause problems to the product, user injury or property damage.
Page 215 TROUBLESHOOTING Ceiling Cassette Installer Setting Mode Installer Setting - Installer Setting Code Table Function Function Code Setting Value Remote Controller LCD 0 : Set to Master Mode Override 1 : Set to Slave 1 : Standard 2 : Low Ceiling Height Selection 3 : High 4 : Super High...
Page 216: Ceiling Concealed Duct (High Static)
TROUBLESHOOTING Ceiling Concealed Duct (High Static) Error Codes Indoor Unit Error Ex) Error 03 (Remote controller error) 3 Times 3 Times 3 Times LED02G LED1 (GREEN) 2 Sec. 2 Sec. LED2 LED 1 LED 2 Indoor Description Error Code (Green) (Red) status Indoor Room sensor error...
Page 217: Dip Switch Setting
TROUBLESHOOTING Ceiling Concealed Duct (High Static) Dip Switch Setting DIP SWITCH SETTING Indoor PCB Function Description Setting Off Setting On Default Selection of Master or Group Control Master Slave Slave Wired/Wireless remote Dry Contact Selection of Dry Contact controller Auto Mode Mode Selection of Manual or...
Page 218 TROUBLESHOOTING Error Indicator (Outdoor) 24-36k Outdoor Units Error Codes Outdoor Error 2 Times 2 Times 2 Times Ex) Error 21 (DC Peak) LED01G (RED) 1 Sec. 1 Sec. 1 Sec. 1 Time 1 Time 1 Time LED02G (GREEN) 2 Sec. 2 Sec.
Page 219: 24-36K Outdoor Units
TROUBLESHOOTING 24-36k Outdoor Units Night Silent Operation Setting 1. Open the Side panel or Top Cover of outdoor unit. 2. Set the SW01N (PIP SW2). MR24UY3J MR36UY3J 3. Close the Side panel or Top Cover. MR24UY3J MR36UY3J...
Page 220: Wiring Diagrams
WIRING DIAGRAMS Ceiling cassette 4-way Figure 801...
Page 221: Ceiling Concealed Duct (High Static) 24K
WIRING DIAGRAMS Ceiling Concealed Duct (High Static) 24k Figure 802...
Page 222: Ceiling Concealed Duct (High Static) 36K
WIRING DIAGRAMS Ceiling Concealed Duct (High Static) 36k Figure 803...
Page 223: Outdoor Unit Dc Inverter Single Zone 24K
WIRING DIAGRAMS Outdoor Unit DC Inverter SINGLE ZONE 24k Figure 804...
Page 224: Outdoor Unit Dc Inverter Single Zone 36K
WIRING DIAGRAMS Outdoor Unit DC Inverter SINGLE ZONE 36k Figure 805...
Page 225: Outdoor Unit Dc Inverter Single Zone -Field Wiring
WIRING DIAGRAMS Outdoor Unit DC Inverter SINGLE ZONE -Field Wiring Field wiring diagrams 1. All wiring must comply with LOCAL REGULATIONS. 2. Select a power source that is capable of supplying the current as required by the air conditioner. 3. Feed the power source to the unit via a distribution switch board designed for this purpose. 4.
Page 226: Ceiling Cassette 4-Way
PARTS CATALOG Figure 901 Ceiling Cassette 4-way Eva-In Eva-Out Air-Inlet...
Page 227: Parts Catalog
PARTS CATALOG Figure 901 Ceiling Cassette 4-way ITEM PART PART DESCRIPTION USED ON MODEL NUMBER 67600501 Base Assembly, Indoor MC24Y3J 67600500 Base Assembly, Indoor MC36Y3J 67604301 Remote Controller Assembly 67600805 Cabinet Assembly MC24Y3J 67600804 Cabinet Assembly MC36Y3J 67600811 Cabinet Assembly, Indoor MC24Y3J 67600813 Cabinet Assembly, Indoor...
Page 228 PARTS CATALOG Ceiling Cassette 4-way Figure 901 ITEM PART PART DESCRIPTION USED ON MODEL NUMBER 67605800 Tube Assembly, Evaporator(In) MC36Y3J 67602700 Holder Assembly 67602807 Hose Assembly, Drain MC36Y3J 67602803 Hose Assembly, Drain MC24Y3J 67604821 Thermistor Assembly, NTC Thermistor2(CN_PIPE/IN) Eva‑in White 67604822 Thermistor Assembly, NTC Thermistor3(CN_PIPE/OUT)
Page 229: Ceiling Concealed Duct (High Static) 24K
PARTS CATALOG Figure 902 Ceiling Concealed Duct (High Static) 24k Eva-In Eva-Out Air-Inlet S P E E D TEM P...
Page 230 PARTS CATALOG Figure 902 Ceiling Concealed Duct (High Static) 24k ITEM PART PART DESCRIPTION USED ON MODEL NUMBER 67602106 Fan Assembly, Blower MD24Y3J 67603600 Orifice MD24Y3J 67602905 Housing Assembly MD24Y3J 67603304 Motor Assembly, DC MD24Y3J 67607000 Clamp, Motor MD24Y3J 67602900 Housing Assembly MD24Y3J 67602101...
Page 231: Ceiling Concealed Duct (High Static) 36K
PARTS CATALOG Figure 903 Ceiling Concealed Duct (High Static) 36k S P E E D TEM P OP E R M OD E EVA-IN EVA-OUT INLET-AIR...
Page 232 PARTS CATALOG Figure 903 Ceiling Concealed Duct (High Static) 36k ITEM PART NUMBER PART DESCRIPTION USED ON MODEL 67603811 Panel Assembly,Rear(Indoor) MD36Y3J 67603812 Panel Assembly,Rear(Indoor) MD36Y3J 67600201 Angle Assembly MD36Y3J 67600401 Barrier,Indoor MD36Y3J 67602102 Fan Assembly,Blower MD36Y3J 67602100 Fan Assembly,Blower MD36Y3J 67602901 Housing Assembly...
Page 233: Outdoor Unit Dc Inverter Single Zone 24K
PARTS CATALOG Figure 904 Outdoor Unit DC Inverter SINGLE ZONE 24k Pressure Sen sor Air / Cond-Out Suction /Discharge pipe Cond-Mid...
Page 234 PARTS CATALOG Figure 904 Outdoor Unit DC Inverter SINGLE ZONE 24k ITEM PART PART DESCRIPTION USED ON MODEL NUMBER 67601612 Cover Assembly, Top(Outdoor) MR24UY3J 67602117 Fan ,Propeller MR24UY3J 67603308 Motor Assembly, DC,Indoor MR24UY3J 67603314 Motor Assembly, DC,Outdoor MR24UY3J 67600711 Bracket Assembly ,Motor(Outdoor) MR24UY3J 67601308 Condenser Assembly ,First...
Page 235 PARTS CATALOG Figure 904 Outdoor Unit DC Inverter SINGLE ZONE 24k ITEM PART PART DESCRIPTION USED ON MODEL NUMBER 67602408 Gasket MR24UY3J 67600926 Case Assembly, Control(Outdoor) MR24UY3J 67603901 PCB Assembly MR24UY3J 67602303 Fuse Assembly MR24UY3J 67602212 Filter, Line Noise MR24UY3J 67604803 Thermistor Assembly, NTC MR24UY3J...
Page 236: Outdoor Unit Dc Inverter Single Zone 36K
PARTS CATALOG Outdoor Unit DC Inverter SINGLE ZONE 36k Figure 905 Air / Cond-Out Cond-Mid Suction / Discharge pipe Pressure sensor...
Page 237 PARTS CATALOG Figure 905 Outdoor Unit DC Inverter SINGLE ZONE 36k ITEM PART PART DESCRIPTION USED ON MODEL NUMBER 67601612 Cover Assembly, Top(Outdoor) MR36UY3J 67602117 Fan, Propeller MR36UY3J 67603308 Motor Assembly, DC, Indoor MR36UY3J 67603314 Motor Assembly, DC, Outdoor MR36UY3J 67603303 Motor Assembly, DC MR36UY3J...
Page 238 PARTS CATALOG Figure 905 Outdoor Unit DC Inverter SINGLE ZONE 36k ITEM PART PART DESCRIPTION USED ON MODEL NUMBER 67604804 Thermistor Assembly, NTC MR36UY3J Thermistor S2(CN‑TH4) Cond‑Mid Blue 67604812 Thermistor Assembly, NTC MR36UY3J Thermistor S4/S3(CN‑TH3) Suction /Discharge pipe 67604814 Thermistor Assembly, NTC MR36UY3J Thermistor S6/S5(CN‑TH2) Air / Cond‑Out...
Page 239: Appendix
APPENDIX Appendix 1: Reference Sheet of Celsius and Farenheit Fahrenheit Fahrenheit Fahrenheit display Fahrenheit display Fahrenheit display Fahrenheit Celsius Celsius Celsius temperature temperature temperature 60.8 69/70 69.8 78/79 78.8 62/63 62.6 71/72 71.6 80/81 80.6 64/65 64.4 73/74 73.4 82/83 82.4 66/67 66.2...
Page 240: Accessories
ACCESSORIES OPTIONAL ACCESSORIES REFRIGERATION LINE SETS (REQUIRED ACCESSORY) Length Kit# Liquid Suction T32150 15’ 1/4” 3/8” T32350 35’ 1/4” 3/8” T42150 15’ 1/4” 1/2” T42350 35’ 1/4” 1/2” T53150 15’ 3/8” 5/8” T53350 35’ 3/8” 5/8” LOW AMBIENT WIND BAFFLE KIT* down to -4°FWB on Multizone units.
Page 241: Limited Warranty
Friedrich Air Conditioning Company 10001 Reunion Place, Suite 500 San Antonio, TX 788.5 31.5‑541‑6645 www.friedrich.com FLOATING AIR DUCTLESS SPLIT SYSTEMS LIMITED WARRANTY 1. A) FIVE YEAR WARRANTY ‑ FRIEDRICH AIR CONDITIONING CO. (FRIEDRICH) warrants to the original end‑user of this product that should it prove defective due to improper workmanship and/or material under normal use for a period of five years from the date of installation, FRIEDRICH will repair or replace, at its option, any defective part without charge for the part.
Page 242: Customer Satisfaction And Quality Assurance
CUSTOMER SATISFACTION and QUALITY ASSURANCE Friedrich is a conscientious manufacturer, concerned about customer satisfaction, product quality, and controlling warranty costs. As an Authorized Service Provider you play a vital role in these areas. By adhering to the policies and procedures you provide us with vital information on each warranty repair you complete. This information is used to identify product failure trends, initiate corrective action, and improve product quality, thereby further reducing warranty expenses while increasing customer satisfaction levels.

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