Related Manuals for Daikin CTX Series
Summary of Contents for Daikin CTX Series
- Page 1 DAMA-SM-21-003 Service Manual Inverter Multi Split Wall Mounted Type CTX(X) Series [Applied Models] Inverter Split : Heat Pump Unit...
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Page 3: Table Of Contents
DAMA-SM-21-003 Introduction ..................1 1. Safety Cautions..................2 1.1 Warnings and Cautions Regarding Safety of Workers......2 1.2 Warnings and Cautions Regarding Safety of Users.........8 2. Icons Used ....................10 3. Revision History ..................11 Part 1 General Information ............12 1. Applicable Models .................13 Part 2 Specifications.............. - Page 4 DAMA-SM-21-003 Part 4 Remote Controller ............. 47 1. Applicable Remote Controller ...............48 2. BRC52B63/64 ..................49 Part 5 Service Diagnosis .............. 50 1. General Problem Symptoms and Check Items ........51 2. Troubleshooting with LED ..............52 2.1 Indoor Unit....................52 2.2 Outdoor Unit ...................52 3.
- Page 5 DAMA-SM-21-003 Part 6 Trial Operation and Field Settings ........92 1. Pump Down Operation................93 2. Forced Cooling Operation ..............94 3. Silicone Grease on Power Transistor/Diode Bridge......95 Part 7 Appendix ................96 1. Piping Diagrams..................97 1.1 Indoor Unit....................97 1.2 Outdoor Unit ...................97 2.
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Page 6: Introduction
DAMA-SM-21-003 Introduction 1. Safety Cautions..................2 1.1 Warnings and Cautions Regarding Safety of Workers......2 1.2 Warnings and Cautions Regarding Safety of Users.........8 2. Icons Used ....................10 3. Revision History ..................11 Introduction... -
Page 7: Safety Cautions
Safety Cautions DAMA-SM-21-003 1. Safety Cautions Be sure to read the following safety cautions before conducting repair work. After the repair work is complete, be sure to conduct a test operation to ensure that the equipment operates normally, and explain the cautions for operating the product to the customer. - Page 8 DAMA-SM-21-003 Safety Cautions Warning Do not turn the air conditioner on or off by plugging in or unplugging the power cable. Plugging in or unplugging the power cable to operate the equipment may cause an electrical shock or fire. Be sure to wear a safety helmet, gloves, and a safety belt when working in a high place (more than 2 m).
- Page 9 Safety Cautions DAMA-SM-21-003 Safety Checklist Checking the area Before beginning work, conduct safety checks to minimise the risk of ignition. When repairing the refrigerating system, take the following precautions before work. Work procedure Work shall be conducted under a controlled procedure so as to minimise the risk of working in the presence of R410A or vapour.
- Page 10 DAMA-SM-21-003 Safety Cautions Safety Checklist (con't) Checking electrical devices Repair and maintenance to electrical components shall include initial safety checks and component inspection procedures. In case there is any fault that could endanger safety, no electrical supply shall be connected to the circuit until the fault is satisfactorily dealt with. Initial safety checks shall include: ...
- Page 11 Safety Cautions DAMA-SM-21-003 Safety Checklist (con't) Leak detection methods The following leak detection methods can be applied for systems containing R410A. Electronic leak detectors shall be used to detect R410A, but the sensitivity may not be adequate or may need re-calibration (detection equipment shall be calibrated in a refrigerant-free area).
- Page 12 DAMA-SM-21-003 Safety Cautions Safety Checklist (con't) Decommissioning Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment and all its details. It is recommended to train technicians so that all of the refrigerant is recovered safely.
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Page 13: Warnings And Cautions Regarding Safety Of Users
Safety Cautions DAMA-SM-21-003 Warnings and Cautions Regarding Safety of Users Warning Do not store the equipment in a room with fire sources (e.g., naked flames, gas appliances, electric heaters). Be sure to use parts listed in the service parts list of the applicable model and appropriate tools to conduct repair work. - Page 14 DAMA-SM-21-003 Safety Cautions 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 is dusty or has a loose connection, it may cause an electrical shock or fire.
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Page 15: Icons Used
Icons Used DAMA-SM-21-003 2. Icons Used The following icons are used to attract the attention of the reader to specific information. Icon Type of Description Information Warning Warning is used when there is danger of personal injury. Warning Caution Caution is used when there is danger that the reader, through incorrect manipulation, may damage equipment, Caution lose data, get an unexpected result or have to restart (part... -
Page 16: Revision History
DAMA-SM-21-003 Revision History 3. Revision History Month/Year Version Revised contents 09/2021 DAMA-SM-21-003 Introduction... -
Page 17: Part 1 General Information
DAMA-SM-21-003 Part 1 General Information 1. Applicable Models .................13 Part 1 General Information... -
Page 18: Applicable Models
DAMA-SM-21-003 Applicable Models 1. Applicable Models Model Name and Power Supply Indoor Unit Outdoor Unit Power Supply CTX07AXVJU CTX09AXVJU 2MX18AXVJU 1Phase, 208/230V, 60Hz CTX12AXVJU General Information... - Page 19 Applicable Models DAMA-SM-21-003 Nomenclature Indoor Unit Definition Description Unit Category C : Multi System Product Type T : Wall Mounted System X : Inverter, Heatpump Capacity Indication* 07 : 7,000 Btu/h Major Design Category A : A Series Factory Origin X : Malaysia Power Supply VJ : 1Phase / 60Hz / 208/230V...
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Page 20: Part 2 Specifications
DAMA-SM-21-003 Part 2 Specifications 1. Specification Data .................16 2. Functions....................20 Part 2 Specifications... - Page 21 Specifications DAMA-SM-21-003 1. Specifications System Indoor CTX07AXVJU, CTX09AXVJU, CTX12AXVJU MODEL 2MX18AXVJU Outdoor Cooling Heating 4.98 (0.88 - 5.13) 4.98 (0.73 - 5.28) Rated Capacity (Min. ~ Max.) Btu/h 17,000 (3,000 - 17,500) 17,000 (2,500 -18,000) Moisture Removal gal/h 0.34 Rated Running Current 7.91 6.49 Rated Power Consumption...
- Page 22 DAMA-SM-21-003 Specifications CTX09AXVJU Model Cooling Heating Rated capacity* 9 kBtu/h Class Front Panel Colour White Turbo High Airflow Rate Medium Quiet Sound Pressure Level (H/M/L/Q) 41/35/29/24 42/36/30/19 Type CROSS FLOW Drive DIRECT Speed 3 STEPS, AUTO, QUIET, TURBO Type DIRECT CURRENT Motor Output Fan Motor Running Current (Rated)
- Page 23 Specifications DAMA-SM-21-003 Outdoor 2MX18AXVJU Model Cooling Heating Capacity Power Consumption Running Current Casing Colour IVORY WHITE Airflow Rate High 1170 1300 Sound Pressure Level Type PROPELLER Drive DIRECT Type DIRECT CURRENT Index of protection (IP) IP 24 Insulation Grade Fan Motor Running Current (Rated) 0.37 0.44...
- Page 24 DAMA-SM-21-003 Specifications Combination Capacity Model : CTX07/09/12A Cooling Capacity of each indoor unit Type of Indoor Combination of Each Capacity (kBtu/h) Total Capacity (kBtu/h) Indoor A Room B Room A Room B Room Rating (Min ~ Max) Wall Wall 7.00 7.00 3.00 ~ 9.50 Wall...
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Page 25: Functions
Functions DAMA-SM-21-003 2. Functions Category Functions Inverter Operation Limit for Cooling (°CDB)(O/D) 10 - 46 Basic Function Operation Limit for Cooling (°FDB)(O/D) 50 - 114.8 Operation Limit for Heating (°CDB)(O/D) -15 - 18 Operation Limit for Heating (°FWB)(O/D) 5 - 64.4 Scroll Compressor —... -
Page 26: Part 3 Functions And Control
DAMA-SM-21-003 Part 3 Functions and Control 1. Main Functions..................22 1.1 Temperature Control ................22 1.2 Frequency Control..................22 1.3 Airflow Direction Control.................24 1.4 Fan Speed Control for Indoor Unit ............24 1.5 Dry Mode....................25 1.6 Automatic Operation................26 1.7 Thermostat Control.................27 1.8 ECO+ Operation ..................28 1.9 Sleep Mode ....................29 1.10 POWERFUL Operation ................29 1.11 Other Functions..................30... -
Page 27: Main Functions
Main Functions DAMA-SM-21-003 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 ... - Page 28 DAMA-SM-21-003 Main Functions The following drawing shows a schematic view of the inverter principle: Refrigerant circulation rate (high) high speed Amount of heat Amount of heat exchanged air (large) exchanged air (large) high f low f Amount of heat Amount of heat exchanged air (small) exchanged air (small) low speed...
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Page 29: Airflow Direction Control
Main Functions DAMA-SM-21-003 Airflow Direction Control Power-Airflow The large flap sends a large volume of air downward to the floor and provides an optimum Flap control in cooling and dry operation. Cooling/Dry During cooling or dry operation, the flap retracts into the indoor unit. Then, cool air can be blown far and distributed all over the room. -
Page 30: Dry Mode
DAMA-SM-21-003 Main Functions Cooling The following drawings explain the principle of fan speed control for cooling. Room thermistor temperature – set temperature Fan speed +2°C (+3.6°F) +1.5°C (+2.7°F) +1.5°C (+2.7°F) +0.5°C (+0.9°F) Heating The following drawings explain the principle of fan speed control for heating. On heating mode, the indoor fan speed will be regulated according to the heat exchanger temperature and the difference between the room temperature and the required target temperature. -
Page 31: Automatic Operation
Main Functions DAMA-SM-21-003 Automatic Operation Automatic Cooling / Heating Function (Heat Pump Only) When the AUTO mode is selected with the remote controller, the microcomputer automatically determines the operation mode from cooling and heating according to the room temperature and setting temperature at the time of the operation startup, and automatically operates in that mode. -
Page 32: Thermostat Control
DAMA-SM-21-003 Main Functions Thermostat Control Outline Thermostat control is based on the difference between the room thermistor temperature and the set temperature. Details Thermostat OFF Conditions The temperature difference is in the zone A. Thermostat ON Conditions The temperature difference returns to the zone C after being in the zone A. ... -
Page 33: Eco+ Operation
Main Functions DAMA-SM-21-003 ECO+ Operation Outline ECO+ operation reduces the maximum operating power input and adjust the target temperature setting. This operation is particularly convenient for energy-saving. It is also a major bonus when breaker capacity does not allow the use of multiple electrical devices and air conditioners. It can be easily activated by pressing ECO+ button on the wireless remote controller. -
Page 34: Sleep Mode
DAMA-SM-21-003 Main Functions Sleep Mode Outline SLEEP Mode can be activated through the remote controller to keep the thermal comfort while sleeping. Details SLEEP Mode continues operation at the target temperature for the first hour, then automatically raises the target temperature slightly in case of cooling, or lowers it slightly in case of heating. This prevents excessive cooling in summer and excessive heating in winter to ensure comfortable sleeping conditions and also saves electricity. -
Page 35: Other Functions
Main Functions DAMA-SM-21-003 1.11 Other Functions 1.11.1 Signal Receiving Sign When the indoor unit receives a signal from the remote controller, the unit emits a signal receiving sound. 1.11.2 Indoor Unit ON/OFF Switch Indoor unit ON/OFF switch is provided on the display of the unit. ... -
Page 36: Thermistor Functions
DAMA-SM-21-003 Thermistor Functions 2. Thermistor Functions (A)CTX series only (3) Outdoor (5) Liquid Pipe Temperature Expansion valve Thermistor Thermistor (2) Outdoor Heat Exchanger Thermistor Four way valve (1) Discharge Pipe (6) Indoor Heat Thermistor (7) Room Exchanger Temperature Thermistor Compressor... -
Page 37: Control Specification
The air conditioner control has normal operation mode, forced operation mode, and power transistor test mode for installation and servicing. Details Applicable for CTX series. There are following modes; Cooling (includes drying), Heating (includes defrosting), Stop. Air conditioner control mode... -
Page 38: Frequency Control
DAMA-SM-21-003 Control Specification Frequency Control Outline The compressor frequency is determined according to the difference between the room thermistor temperature and the target temperature. When the shift of the frequency is less than zero (∆F<0) by PI control, the target frequency is used as the command frequency. Dropping function Input current control, etc. - Page 39 Control Specification DAMA-SM-21-003 When starting the compressor, the frequency is initialized according to the ΔD value of the Initial Frequency indoor unit. ΔD signal: Indoor frequency command The difference between the room thermistor temperature and the target temperature is taken as the ΔD value and is used for ΔD signal of frequency command.
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Page 40: Controls At Mode Changing/Start-Up
DAMA-SM-21-003 Control Specification 3.3 Controls at Mode Changing/Start-up 3.3.1 3-Minute Standby Turning on the compressor is prohibited for 3 minutes after turning off. 3.3.2 Four Way Valve Switching Outline Heat Pump Only During the heating operation current must be conducted and during cooling and defrosting current must not be conducted. -
Page 41: Discharge Pipe Temperature Control
Control Specification DAMA-SM-21-003 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 the discharge pipe temperature from rising further. Details Stop zone A°C (°F) -
Page 42: Input Current Control
DAMA-SM-21-003 Control Specification Input Current Control Outline The microcomputer calculates the input current while the compressor is running, and sets the frequency upper limit based on the input current. Details Compressor Stop Stop zone Dropping zone Keep zone Input current Reset zone ... -
Page 43: Freeze-Up Protection Control
Control Specification DAMA-SM-21-003 Freeze-up Protection Control Outline During cooling operation, the signals sent from the indoor unit control the operating frequency limitation and prevent freezing of the indoor heat exchanger. The signal from the indoor unit is divided into zones. Details The operating frequency limitation is judged with the indoor heat exchanger temperature. -
Page 44: Heating Peak-Cut Control
DAMA-SM-21-003 Control Specification Heating Peak-cut Control Outline Heat Pump Only During heating operation, the signals being sent from the indoor unit allow the operating frequency limitation and prevent abnormal high pressure. (The signal from the indoor unit must be divided as follows.) Details Conditions for Start Controlling Judge the controlling start with the indoor heat exchanger temperature after 2 sec. -
Page 45: Outdoor Fan Control
Control Specification DAMA-SM-21-003 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. 2. Fan OFF delay when stopped The outdoor fan is turned OFF 60 seconds after the compressor stops. -
Page 46: Liquid Compression Protection Function
DAMA-SM-21-003 Control Specification Liquid Compression Protection Function Outline In order to increase the dependability of the compressor, the compressor is stopped according to the outdoor temperature. Details Operation stops depending on the outdoor temperature. The compressor turns off under the conditions that the system is in cooling operation and outdoor temperature is below X°C (X°F). -
Page 47: Electronic Expansion Valve Control
Control Specification DAMA-SM-21-003 3.11 Electronic Expansion Valve Control 3.11.1 Summary of Electronic Expansion Valve Control Controlling the electronic expansion valve is to ensure the reliability while optimizing the refrigerating cycle responding to the operation status. The summary of electronic expansion valve control is shown as below. Functions and Control... - Page 48 DAMA-SM-21-003 Control Specification 3.11.2 Full Close as Power Supply ON When the power is turned ON, the electronic expansion valve is initialized to position the valve opening and facilitate pressure equalization. (Prevent the compressor from being locked by start-up with differential pressure) Processes as power supply ON ...
- Page 49 Control Specification DAMA-SM-21-003 3.11.9 High Discharge Pipe Temperature Control When the compressor is operating, if the discharge pipe temperature exceeds a certain value, the electronic expansion valve opens and the refrigerant runs to the low pressure side. This procedure lowers the discharge pipe temperature by cooling the compressor with refrigerant. A (°C) 105.0 B (°C)
- Page 50 DAMA-SM-21-003 Control Specification For cooling mode: Discharge pipe temperature + C°C (°F) < outdoor heat exchanger temperature 630.0 540.0 C (°C) 630.0 540.0 C (°F) 10.8 For heating mode: Discharge pipe temperature + D°C (°F) < indoor heat exchanger temperature 630.0 540.0 D (°C)
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Page 51: Malfunctions
Control Specification DAMA-SM-21-003 3.12 Malfunctions 3.12.1 Sensor Malfunction Detection Sensor malfunction can be detected in the following thermistors in open or short circuit. 1. Outdoor heat exchanger thermistor 2. Discharge pipe thermistor 3. Radiation fin thermistor 4. Outdoor temperature thermistor 3.12.2 Detection of Overcurrent and Overload Outline In order to protect the inverter, an excessive output current is detected in wire labelled as No 1... -
Page 52: Part 4 Remote Controller
DAMA-SM-21-003 Part 4 Remote Controller 1. Applicable Remote Controller ...............48 2. BRC52B63 ....................49 Remote Controller... -
Page 53: Applicable Remote Controller
Applicable Remote Controller DAMA-SM-21-003 1. Applicable Remote Controller Series Model Name Remote Controller CTX07/09/12AXVJU BRC52B63 Remote Controller... -
Page 54: Brc52B63/64
DAMA-SM-21-003 BRC52B63 2. BRC52B63 GV: GOODMAN (USA) CTX07/09/12AXVJU REMOTE CONTROLLER OVERVIEW For cooling/heating model IR Signal Transmitter • To enable signal transmission, direct the transmitter at the indoor Display (LCD) unit. • Display the current Note that in condition settings. where there is an obstacle (This illustration shows the that blocks between the... -
Page 55: Part 5 Service Diagnosis
DAMA-SM-21-003 Part 5 Service Diagnosis 1. General Problem Symptoms and Check Items ........51 2. Troubleshooting with LED ..............52 2.1 Indoor Unit....................52 2.2 Outdoor Unit ...................52 3. Error Diagnosis ..................53 3.1 To enter error diagnosis .................53 4. Troubleshooting ..................54 4.1 Error Codes and Description ..............54 4.2 Indoor Unit PCB Abnormality ..............56 4.3 Freeze-up Protection Control ..............57 4.4 Indoor Fan Motor (DC Motor) or Related Abnormality ......58... -
Page 56: General Problem Symptoms And Check Items
DAMA-SM-21-003 General Problem Symptoms and Check Items 1. General Problem Symptoms and Check Items Reference Symptom Check Item Details Page The unit does not operate. Check the power supply. Check if the rated voltage is supplied. — Check the type of the indoor unit. Check if the indoor unit type is compatible —... -
Page 57: Troubleshooting With Led
Troubleshooting with LED DAMA-SM-21-003 2. Troubleshooting with LED Indoor Unit Operation Lamp The operation lamp blinks when any of the following errors is detected. 1. A protection device of the indoor or outdoor unit is activated, or the thermistor malfunctions. 2. -
Page 58: Error Diagnosis
DAMA-SM-21-003 Error Diagnosis 3. Error Diagnosis To enter error diagnosis GV : Press [Timer CANCEL] to scroll to next °C TIMER CANCEL GV (CTX) Notes 1. A short beep and two consecutive beeps indicate non-corresponding codes. 2. To return to the normal mode. GV : Press [Timer CANCEL] for 5 seconds When the remote controller is left untouched for 60 seconds, it also returns to the normal mode. -
Page 59: Troubleshooting
Troubleshooting DAMA-SM-21-003 4. Troubleshooting Error Codes and Description Error Description Reference Page Codes System Normal condition Low-voltage detection or over-voltage detection Signal transmission error (between indoor unit and outdoor unit) Installation error (between indoor unit and outdoor unit) Indoor Unit Indoor unit PCB abnormality Freeze-up protection control Indoor fan motor (DC motor) or related abnormality... - Page 60 DAMA-SM-21-003 Troubleshooting Error Code Definition Error Code Checklist Meaning Normal Indoor PCB error Drain pump abnormal Antifreeze Indoor fan motor abnormal Electrical air cleaner abnormal Indoor heat exchanger (1) thermistor short / open Indoor heat exchanger (2) thermistor short / open Louver limit switch error ...
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Page 61: Indoor Unit Pcb Abnormality
Troubleshooting DAMA-SM-21-003 Indoor Unit PCB Abnormality Error Code Description Indoor PCB Abnormality Method of Error The system checks if the On/OFF switch works properly. Detection Error Decision ON/OFF switch malfunction. Conditions Defective indoor unit PCB. Supposed Defective ON/OFF switch. Causes Troubleshooting Be sure to turn off the power switch before connecting or disconnecting... -
Page 62: Freeze-Up Protection Control
DAMA-SM-21-003 Troubleshooting Freeze-up Protection Control Error Code Method of Error During cooling operation, the freeze-up protection control (operation halt) is activated according to the temperature detected by the indoor heat exchanger thermistor. Detection High pressure control (heat pump model only). During heating operations, the temperature detected by the indoor heat exchanger. -
Page 63: Indoor Fan Motor (Dc Motor) Or Related Abnormality
Troubleshooting DAMA-SM-21-003 Indoor Fan Motor (DC Motor) or Related Abnormality Error Code Description Indoor Fan Motor Abnormality Method of Error The rotation speed detected by the Hall IC during fan motor operation is used to determine Detection abnormal fan motor operation. Error Decision The detected rotation speed does not reach the demanded rotation speed of the target tap, and Conditions... -
Page 64: Thermistor Or Related Abnormality (Indoor Unit)
DAMA-SM-21-003 Troubleshooting Thermistor or Related Abnormality (Indoor Unit) Error Code Description Indoor Heat Exchange Thermistor Short/Open. Method of Error The temperature detected by the thermistors determine thermistor errors. Detection The resistance of the thermistor is out of range (0 Ω or ∞ Ω) Error Decision Conditions ... -
Page 65: Thermistor Or Related Abnormality (Indoor Unit)
Troubleshooting DAMA-SM-21-003 Thermistor or Related Abnormality (Indoor Unit) Error Code Description Room temperature thermistor short/open. Method of Error The temperature detected by the thermistors determine thermistor errors. Detection The resistance of the thermistor is out of range (0 Ω or ∞ Ω) Error Decision Conditions ... -
Page 66: Low-Voltage Detection Or Over-Voltage Detection
DAMA-SM-21-003 Troubleshooting Low-voltage Detection or Over-voltage Detection Error Code Method of Error Low-voltage detection: An abnormal voltage drop is detected by the DC voltage detection circuit. Detection Over-voltage detection: An abnormal voltage rise is detected by the DC over-voltage detection circuit. Error Decision Low-voltage detection: ... -
Page 67: Signal Transmission Error (Between Indoor Unit And Outdoor Unit)
Troubleshooting DAMA-SM-21-003 Signal Transmission Error (Between Indoor Unit and Outdoor Unit) Error Code Method of Error The signal transmission data received from the outdoor unit is checked whether it is normal. Detection Error Decision The data sent from the outdoor unit cannot be received normally, or the content of the data is Conditions abnormal. - Page 68 DAMA-SM-21-003 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Caution Check the power supply voltage. Is the voltage fluctuation Correct the power supply. within ±10% from the rated value? Check the connection wires between the indoor unit and the outdoor unit.
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Page 69: Installation Error
Troubleshooting DAMA-SM-21-003 Installation error Error Code Method of Error The supply power is detected for its requirements (pair type is different from multi type) by the Detection indoor/outdoor transmission signal. Error Decision The pair type and multi type are interconnected. Conditions ... -
Page 70: Outdoor Unit Pcb Abnormality
DAMA-SM-21-003 Troubleshooting 4.10 Outdoor Unit PCB Abnormality Error Code The system checks if the microcomputer is working in order. Method of Error The system checks if the zero-cross signal comes in properly. Detection The microcomputer program runs out of control. Error Decision ... -
Page 71: Ol Activation (Compressor Overload)
Troubleshooting DAMA-SM-21-003 4.11 OL Activation (Compressor Overload) Error Code Description OL activation (compressor overload). Method of Error A compressor overload is detected through compressor OL. Detection If the error repeats, the system is shut down. Error Decision Reset condition: Continuous run for about 60 minutes without any other error Conditions ... - Page 72 Replace the OL harness. Check the electronic Replace the electronic expansion expansion valve. valve or the coil applicable to CTX series (mode) Replace the four way valve or the Check the four way coil. valve Replace the outdoor unit PCB (main PCB).
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Page 73: Compressor Lock
Troubleshooting DAMA-SM-21-003 4.12 Compressor Lock Error Code Description Compressor lock. Method of Error A compressor lock is detected by checking the compressor running condition through the Detection position detection circuit. If the error repeats, the system is shut down. Error Decision ... -
Page 74: Dc Fan Lock
DAMA-SM-21-003 Troubleshooting 4.13 DC Fan Lock Error Code Method of Error An error is determined with the high-voltage fan motor rotation speed detected by the Hall IC. Detection The fan does not start in about 30 ~ 60 seconds (depending on the model) even when the Error Decision Conditions fan motor is running. -
Page 75: Input Overcurrent Detection
Troubleshooting DAMA-SM-21-003 4.14 Input Overcurrent Detection Error Code Description Input Overcurrent Detection Method of Error An input overcurrent is detected by checking the input current value with the compressor Detection running. The current exceeds 10.2 A (depending on the model) for 2.5 seconds with the compressor running. Error Decision The upper limit of the current decreases when the outdoor temperature exceeds a certain level. -
Page 76: Discharge Pipe Temperature Control
DAMA-SM-21-003 Troubleshooting 4.15 Discharge Pipe Temperature Control Error Code Method of Error An error is determined with the temperature detected by the discharge pipe thermistor. Detection If the temperature detected by the discharge pipe thermistor rises above A°C (°F), the Error Decision compressor stops. -
Page 77: High Pressure Control In Cooling
Troubleshooting DAMA-SM-21-003 4.16 High Pressure Control in Cooling Error Code Method of Error High-pressure control (operation halt, frequency drop, etc.) is activated in cooling mode if the temperature sensed by the outdoor heat exchanger thermistor exceeds the limit. Detection The temperature sensed by the outdoor heat exchanger thermistor rises above A°C (°F). Error Decision ... - Page 78 DAMA-SM-21-003 Troubleshooting Reference Check No.01 Refer to P.85 Reference Check No.12 Refer to P.86 Reference Check No.17 Refer to P.89 Reference Check No.18 Refer to P.89 Reference Check No.19 Refer to P.90 Note When replacing the defective thermistor(s), replace the thermistor as ASSY. Service Diagnosis...
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Page 79: Compressor System Sensor Abnormality
Troubleshooting DAMA-SM-21-003 4.17 Compressor System Sensor Abnormality Error Code Method of Error The system checks the DC current before the compressor starts. Detection The voltage converted from the DC current before compressor start-up is out of the range Error Decision Conditions 0.5 ~ 4.5 V. -
Page 80: Position Sensor Abnormality
DAMA-SM-21-003 Troubleshooting 4.18 Position Sensor Abnormality Error Code Description Position Sensor Abnormality Method of Error A compressor start-up failure is detected by checking the compressor running condition through the position detection circuit. Detection The compressor fails to start in about 15 seconds after the compressor run command signal Error Decision is sent. -
Page 81: Thermistor Or Related Abnormality (Outdoor Unit)
Troubleshooting DAMA-SM-21-003 4.19 Thermistor or Related Abnormality (Outdoor Unit) H9, J3, J6 and P4 Error Code Description Thermistor or Related Abnormality (Outdoor Unit) Method of Error This fault is identified based on the thermistor input voltage to the microcomputer. Detection A thermistor fault is identified based on the temperature sensed by each thermistor. - Page 82 DAMA-SM-21-003 Troubleshooting Reference Check No.01 Refer to P.85 Note When replacing the defective thermistor(s), replace the thermistor as ASSY. Service Diagnosis...
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Page 83: Electrical Box Temperature Rise
Troubleshooting DAMA-SM-21-003 4.20 Electrical Box Temperature Rise Error Code Method of Error An electrical box temperature rise is detected by checking the radiation fin thermistor with the Detection compressor off. With the compressor off, the radiation fin temperature is above A °C (°F). Error Decision ... -
Page 84: Radiation Fin Temperature Rise
DAMA-SM-21-003 Troubleshooting 4.21 Radiation Fin Temperature Rise Error Code Method of Error A radiation fin temperature rise is detected by checking the radiation fin temperature with the compressor on. Detection The radiation fin temperature with the compressor on is above A °C (°F). Error Decision ... -
Page 85: Output Overcurrent Detection
Troubleshooting DAMA-SM-21-003 4.22 Output Overcurrent Detection Error Code Description Output Overcurrent Detection Method of Error An output overcurrent is detected by checking the current that flows in the inverter DC section. Detection A position signal error occurs while the compressor is running. Error Decision ... - Page 86 DAMA-SM-21-003 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Caution Check No. 17 Check the installation condition. Fully open the stop valve. Stop valve fully open? Turn off the power. Then, turn on the power to restart the system.
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Page 87: Four Way Valve Abnormality
Troubleshooting DAMA-SM-21-003 4.23 Four Way Valve Abnormality Remote Controller Display Method of The indoor air temperature thermistor, the indoor unit heat exchanger thermistor, the outdoor temperature thermistor and the outdoor unit heat exchanger thermistor are checked to see if the Malfunction function within their normal ranges in the operating mode. - Page 88 DAMA-SM-21-003 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Four way valve Correct the four way coil disconnected valve coil. (loose)? Harness Reconnect the disconnected? harness. Check the continuity of the four way valve coil and harness.
- Page 89 Troubleshooting DAMA-SM-21-003 Reference Check No.01 Refer to P.85 Reference Check No.13 Refer to P.87 Reference Check No.14 Refer to P.88 Note When replacing the defective thermistor(s), replace the thermistor as ASSY. Service Diagnosis...
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Page 90: Actuator Check
DAMA-SM-21-003 Actuator Check 5. Actuator Check Thermistor Resistance Check Check No.01 Measure the resistance of each thermistor using multimeter. The resistance values are defined by below table. If the measured resistance value does not match the listed value, the thermistor must be replaced. -
Page 91: Power Supply Waveform Check
Actuator Check DAMA-SM-21-003 Power Supply Waveform Check Check No.11 Measure the power supply waveform between No. 1 and No. 2 on the terminal strip, and check the waveform disturbance. Check if the power supply waveform is a sine wave (Fig.1). ... -
Page 92: Four Way Valve Performance Check
DAMA-SM-21-003 Actuator Check Four Way Valve Performance Check Check No.13 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Caution Turn the power off and then on again * Four way valve coil Cooling / Dry / Start heating operation Defrost: Not energized Heating: energized... -
Page 93: Inverter Unit Refrigerant System Check
Actuator Check DAMA-SM-21-003 Inverter Unit Refrigerant System Check Check No.14 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Caution Refrigerant system check Is the discharge pipe Reconnect the thermistor. thermistor disconnected from the holder? Check for refrigerant leakage. -
Page 94: Installation Condition Check
DAMA-SM-21-003 Actuator Check Installation Condition Check Check No.17 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Caution Installation condition check Check the allowable dimensions of the air Change the installation suction and location or direction. -
Page 95: Outdoor Fan System Check
Actuator Check DAMA-SM-21-003 Outdoor Fan System Check Check No.19 DC motor Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Caution Check the outdoor fan system. Fan motor Is the lead wire connector Go to Check No. -
Page 96: Power Module Check
DAMA-SM-21-003 Actuator Check 5.11 Power Module Check Check No.22 Check to make sure that the voltage between (+) and (–) of the power module is approximately 0 V before checking. Disconnect the compressor (X12A)/fan motor (X11A) harness connector from the outdoor unit PCB. -
Page 97: Part 6 Trial Operation And Field Settings
DAMA-SM-21-003 Part 6 Trial Operation and Field Settings 1. Pump Down Operation................93 2. Forced Cooling Operation ..............94 3. Silicone Grease on Power Transistor/Diode Bridge......95 Part 6 Trial Operation and Field Settings... -
Page 98: Pump Down Operation
DAMA-SM-21-003 Pump Down Operation 1. Pump Down Operation Outline In order to protect the environment, be sure to conduct pump down operation when relocating or disposing of the unit. Details 1. Remove the valve caps from the liquid stop valves and the gas stop valves. 2. -
Page 99: Forced Cooling Operation
Forced Cooling Operation DAMA-SM-21-003 2. Forced Cooling Operation Outline 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. Protection functions have priority over all other functions during forced cooling operation. -
Page 100: Silicone Grease On Power Transistor/Diode Bridge
DAMA-SM-21-003 Silicone Grease on Power Transistor/Diode Bridge 3. Silicone Grease on Power Transistor/Diode Bridge Outline Apply the specified silicone grease to the heat radiation part of a power transistor/diode bridge when you replace an outdoor unit PCB. The silicone grease encourages the heat radiation of a power transistor/diode bridge. -
Page 101: Part 7 Appendix
DAMA-SM-21-003 Part 7 Appendix 1. Piping Diagrams..................97 1.1 Indoor Unit....................97 1.2 Outdoor Unit ...................97 2. Wiring Diagrams..................98 2.1 Indoor Unit....................98 2.2 Outdoor Unit ...................98 2.3 Printed Circuit Board Connector Wiring Diagram........99 2.4 Printed Circuit Board Connector Wiring Diagram.........100 Operation Limit ................102 Part 7 Appendix... -
Page 102: Piping Diagrams
DDAMA-SM-21-003 Piping Diagrams 1. Piping Diagrams Indoor Unit Model: CTX07/09/12A 3D134515 Note: Dimension in inch Outdoor Unit Model: 2MX18A 3D134478 Note: Dimension in inch Appendix... -
Page 103: Wiring Diagrams
Wiring Diagrams DAMA-SM-21-003 2. Wiring Diagrams Indoor Unit Model: CTX07/09/12A 3P599152C Outdoor Unit Model: 2MX18A 3P631402 Appendix... -
Page 104: Printed Circuit Board Connector Wiring Diagram
DDAMA-SM-21-003 Wiring Diagrams Printed Circuit Board Connector Wiring Diagram Control PCB CN_SW_UD Connector for swing motor (horizontal blade) (A1P) CN_DSP Connector for display/signal receiver PCB (A2P) CN_COIL Connector for indoor heat exchange thermistor (R2T) CN_DCFN Connector for DC fan motor LIVE, NEUTRAL, SIG Connector for terminal strip EARTH... -
Page 105: Printed Circuit Board Connector Wiring Diagram
Wiring Diagrams DAMA-SM-21-003 Note The symbols in the parenthesis are the names on the appropriate wiring diagram. Printed Circuit Board Connector Wiring Diagram 2.4.1 09/12 Class Main PCB (A1P) Connector for electronic expansion valve coil Connector for overload protector Connector for DC fan motor Connector for thermistors (outdoor temperature, outdoor heat exchanger, discharge pipe temperature) - Page 106 DDAMA-SM-21-003 Wiring Diagrams 2.4.2 18/24 Class Main PCB (A1P) Connector for electronic expansion valve coil Connector for overload protector Connector for DC fan motor Connector for thermistors (outdoor temperature, outdoor heat exchanger, discharge pipe temperature) HL1, HN1, S Connector for terminal strip E1, E2 Terminals for earth wire U, V, W...
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Page 107: Operation Limit
Operation Limit DAMA-SM-21-003 3. Operation Limit Heatpump Model: 2MX-A COOLING HEATING 64.4 114.8 57.2 68 73.4 82.4 86 INDOOR TEMP (°FWB) INDOOR TEMP (°FDB) 3P621387-1 Appendix... - Page 108 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 unauthorized parts and accessories or improper installation of parts and accessories can result in water or refrigerant leakage, electrical shock, fire or explosion.