Daikin FTXG-J Service Manual Download Page 118

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Troubleshooting

SiBE041012_B

108

Service Diagnosis

4.27 Output Overcurrent Detection

Error Code

Method of Error
Detection

An output overcurrent is detected by checking the current that flows in the inverter DC section.

Error Decision
Conditions

A position signal error occurs while the compressor is running.

A speed error occurs while the compressor is running.

An output overcurrent signal is fed from the output overcurrent detection circuit to the
microcomputer.

If the error repeats, the system is shut down.

Reset condition: Continuous run for about 11 minutes (25/35 class) or 5 minutes (50 class)
without any other error

Supposed
Causes

Poor installation condition

Closed stop valve

Defective power module

Wrong internal wiring

Abnormal power supply voltage

Defective outdoor unit PCB

Defective compressor

Summary of Contents for FTXG-J

Page 1: ...Service Manual Applied Models z Inverter Pair Heat Pump Inverter Pair Wall Mounted Type J Series SiBE041012_B ...

Page 2: ...XG25JV1BS FTXG25JV1BA FTXG35JV1BW FTXG35JV1BS FTXG35JV1BA FTXG50JV1BW FTXG50JV1BS FTXG50JV1BA Outdoor Unit RXG25J2V1B RXG25K2V1B RXG25K3V1B RXG35J2V1B RXG35K2V1B RXG35K3V1B RXG50K2V1B RXG50K3V1B The removal procedure for each model is separately bound Refer to page 137 for the booklet number of applicable model ...

Page 3: ...ration 28 1 7 Automatic Operation 29 1 8 Thermostat Control 30 1 9 NIGHT SET Mode 31 1 10 ECONO Operation 32 1 11 INTELLIGENT EYE Operation 33 1 12 Inverter POWERFUL Operation 34 1 13 Multi Colored Indicator Lamp TIMER Lamp 34 1 14 Clock Setting 36 1 15 WEEKLY TIMER Operation 37 1 16 Other Functions 43 2 Function of Thermistor 44 3 Control Specification 45 3 1 Mode Hierarchy 45 3 2 Frequency Contr...

Page 4: ...4 4 13 OL Activation Compressor Overload 86 4 14 Compressor Lock 88 4 15 DC Fan Lock 89 4 16 Input Overcurrent Detection 90 4 17 Four Way Valve Abnormality 91 4 18 Discharge Pipe Temperature Control 93 4 19 High Pressure Control in Cooling 94 4 20 Compressor System Sensor Abnormality 95 4 21 Position Sensor Abnormality 97 4 22 DC Voltage Current Sensor Abnormality 25 35 Class Only 100 4 23 CT or R...

Page 5: ...tion 126 4 Field Settings 127 4 1 When 2 Units are Installed in 1 Room 127 4 2 Standby Electricity Saving 128 4 3 Facility Setting Jumper cooling at low outdoor temperature 129 4 4 Jumper and Switch Settings 130 5 Silicon Grease on Power Transistor Diode Bridge 131 Part 8 Appendix 132 1 Piping Diagrams 133 1 1 Indoor Unit 133 1 2 Outdoor Unit 133 2 Wiring Diagrams 135 2 1 Indoor Unit 135 2 2 Outdo...

Page 6: ...power cable plug from the plug socket before disassembling the equipment for repair Working on the equipment that is connected to the power supply may cause an electrical shock If it is necessary to supply power to the equipment to conduct the repair or inspecting the circuits do not touch any electrically charged sections of the equipment If the refrigerant gas is discharged during the repair wor...

Page 7: ...ectrical shock Do not clean the air conditioner by splashing water Washing the unit with water may cause an electrical shock Be sure to provide the grounding when repairing the equipment in a humid or wet place to avoid electrical shocks Be sure to turn off the power switch and unplug the power cable when cleaning the equipment The internal fan rotates at a high speed and may cause injury Be sure ...

Page 8: ...heat generation or fire When wiring between the indoor and outdoor units make sure that the terminal cover does not lift off or dismount because of the cable If the cover is not mounted properly the terminal connection section may cause an electrical shock excessive heat generation or fire Do not damage or modify the power cable Damaged or modified power cable may cause an electrical shock or fire...

Page 9: ...event children from swallowing it If a child swallows the coin battery see a doctor immediately Warning Caution Installation of a leakage breaker is necessary in some cases depending on the conditions of the installation site to prevent electrical shocks Do not install the equipment in a place where there is a possibility of combustible gas leaks If the combustible gas leaks and remains around the...

Page 10: ...re to install the packing and seal on the installation frame properly If the packing and seal are not installed properly water may enter the room and wet the furniture and floor For unitary type only Caution Icon Type of Information Description Note Note A note provides information that is not indispensable but may nevertheless be valuable to the reader such as tips and tricks Caution Caution A ca...

Page 11: ...SiBE041012_B List of Functions 1 Part 1 List of Functions 1 Functions 2 ...

Page 12: ...re z 3 D airflow Self diagnosis digital led display z COMFORT AIRFLOW operation z Wiring error check function Comfort Control Auto fan speed z Anti corrosion treatment of outdoor heat exchanger z Indoor unit quiet operation z NIGHT QUIET mode automatic Flexibility Multi split split type compatible indoor unit z OUTDOOR UNIT QUIET operation manual z Flexible power supply correspondence INTELLIGENT ...

Page 13: ...power failure z z 3 D airflow Self diagnosis digital LED display z z COMFORT AIRFLOW operation z z Wiring error check function Comfort Control Auto fan speed z z Anti corrosion treatment of outdoor heat exchanger z z Indoor unit quiet operation z z NIGHT QUIET mode automatic Flexibility Multi split split type compatible indoor unit z z OUTDOOR UNIT QUIET operation manual z z INTELLIGENT EYE operat...

Page 14: ...ED display z z COMFORT AIRFLOW operation z z Wiring error check function Comfort Control Auto fan speed z z Anti corrosion treatment of outdoor heat exchanger z z Indoor unit quiet operation z z NIGHT QUIET mode automatic Flexibility Multi split split type compatible indoor unit z z OUTDOOR UNIT QUIET operation manual z z INTELLIGENT EYE operation z z Flexible power supply correspondence Quick war...

Page 15: ...SiBE041012_B Specifications 5 Part 2 Specifications 1 Specifications 6 ...

Page 16: ...ovable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 09 0 08 0 08 0 12 0 11 0 11 0 09 0 08 0 08 0 12 0 11 0 11 Power Consumption Rated W 18 18 18 24 24 24 18 18 18 24 24 24 Power Factor 90 9 97 8 93 8 90 9 94 9 90 9 90 9 97 8 93 8 90 9 94 9 90 9 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 295 915 155 295 915 155 Packaged Dim...

Page 17: ...e Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 13 0 12 0 12 0 16 0 15 0 14 0 13 0 12 0 12 0 16 0 15 0 14 Power Consumption Rated W 26 26 26 32 32 32 26 26 26 32 32 32 Power Factor 90 9 94 2 90 3 90 9 92 8 95 2 90 9 94 2 90 3 90 9 92 8 95 2 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 295 915 155 295 915 155 Packaged Dimensio...

Page 18: ... Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 09 0 08 0 08 0 12 0 11 0 11 0 09 0 08 0 08 0 12 0 11 0 11 Power Consumption Rated W 18 18 18 24 24 24 18 18 18 24 24 24 Power Factor 90 9 97 8 93 8 90 9 94 9 90 9 90 9 97 8 93 8 90 9 94 9 90 9 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 295 915 155 295 915 1...

Page 19: ...ward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 13 0 12 0 12 0 16 0 15 0 14 0 13 0 12 0 12 0 16 0 15 0 14 Power Consumption Rated W 26 26 26 32 32 32 26 26 26 32 32 32 Power Factor 90 9 94 2 90 3 90 9 92 8 95 2 90 9 94 2 90 3 90 9 92 8 95 2 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 295 915 155 295 9...

Page 20: ...emovable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 16 0 15 0 14 0 19 0 18 0 17 0 16 0 15 0 14 0 19 0 18 0 17 Power Consumption Rated W 32 32 32 38 38 38 32 32 32 38 38 38 Power Factor 90 9 92 8 95 2 90 9 91 8 93 1 90 9 92 8 95 2 90 9 91 8 93 1 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 295 915 155 295 915 155 Packaged D...

Page 21: ...movable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 09 0 08 0 08 0 12 0 11 0 11 0 09 0 08 0 08 0 12 0 11 0 11 Power Consumption Rated W 18 18 18 24 24 24 18 18 18 24 24 24 Power Factor 90 9 97 8 93 8 90 9 94 9 90 9 90 9 97 8 93 8 90 9 94 9 90 9 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 295 915 155 295 915 155 Packaged Di...

Page 22: ...r Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 13 0 12 0 12 0 16 0 15 0 14 0 13 0 12 0 12 0 16 0 15 0 14 Power Consumption Rated W 26 26 26 32 32 32 26 26 26 32 32 32 Power Factor 90 9 94 2 90 3 90 9 92 8 95 2 90 9 94 2 90 3 90 9 92 8 95 2 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 295 915 155 295 915 155 Package...

Page 23: ...Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 16 0 15 0 14 0 19 0 18 0 17 0 16 0 15 0 14 0 19 0 18 0 17 Power Consumption Rated W 32 32 32 38 38 38 32 32 32 38 38 38 Power Factor 90 9 92 8 95 2 90 9 91 8 93 1 90 9 92 8 95 2 90 9 91 8 93 1 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 295 915 155 295 915 155 Packaged ...

Page 24: ...BE041012_B 14 Printed Circuit Board Connector Wiring Diagram Part 3 Printed Circuit Board Connector Wiring Diagram 1 Indoor Unit 15 2 Outdoor Unit 17 2 1 25 35 Class 17 2 2 RXG50K2V1B 19 2 3 RXG50K3V1B 20 ...

Page 25: ...ger thermistor 4 S41 Connector for swing motors 5 S42 Connector for reduction motor front panel mechanism and limit switch 6 S46 Connector for signal receiver display PCB 7 S200 Connector for fan motor 8 H1 H2 H3 Connector for terminal board indoor outdoor transmission 9 FG Connector for terminal board frame ground 10 JB Fan speed setting when compressor stops for thermostat OFF JC Power failure r...

Page 26: ...operation may occur if you cut any of them INTELLIGENT EYE Sensor PCB 1 S51 Connector for control PCB 2 S52 Connector for room temperature thermistor 3 S1W Forced cooling operation ON OFF button Refer to page 124 for detail 4 H1P LED for operation multi color 5 H2P LED for INTELLIGENT EYE green 6 JA Address setting jumper Refer to page 127 for detail S52 S51 S1W JA H2P H1P 3P254832 1 1 S36 Connect...

Page 27: ...oad protector 4 S50 Connector for magnetic relay 5 S70 Connector for fan motor 6 S80 Connector for four way valve coil 7 S90 Connector for thermistors outdoor temperature outdoor heat exchanger discharge pipe 8 S100 Connector for forced operation button PCB 9 HL3 HN3 Connector for filter PCB 10 HR2 Connector for reactor 11 U V W Connector for compressor 12 FU2 Fuse 3 15 A 250 V 13 LED A LED for se...

Page 28: ... terminal board 3 E1 E2 Terminal for earth wire 4 HL2 HN2 Connector for main PCB 5 HR1 Connector for reactor 6 FU1 Fuse 3 15 A 250 V 7 FU3 Fuse 20 A 250 V 8 V2 V3 Varistor HR1 HL2 3P254234 1 FU1 HN2 S FU3 AC2 E1 E2 AC1 S11 V3 V2 to S50 on main PCB 1 S110 Connector for main PCB 2 SW1 Forced cooling operation ON OFF switch Refer to page 124 for detail SW1 S110 3P255755 1 ...

Page 29: ...r thermistors outdoor temperature outdoor heat exchanger discharge pipe 8 AC1 AC2 Connector for terminal board power supply 9 E1 E2 Connector for earth wire 10 HR1 HR2 Connector for reactor 11 U V W Connector for compressor 12 FU1 Fuse 30 A 250 V 13 FU2 FU3 Fuse 3 15 A 250 V 14 V2 V3 V5 V6 V11 Varistor V3 V11 AC1 FU2 E1 E2 FU3 W 2P282217 1 S40 S20 S80 V U S70 S90 S51 S10 AC2 S101 V5 V6 V2 FU1 HR1 ...

Page 30: ...oil 4 S40 Connector for overload protector 5 S50 Connector for magnetic relay 6 S70 Connector for fan motor 7 S80 Connector for four way valve coil 8 S90 Connector for thermistors outdoor temperature outdoor heat exchanger discharge pipe 9 HL3 HN3 Connector for HL2 HN2 on filter PCB 10 U V W Terminal for compressor 11 FU2 Fuse 3 15 A 250 V 12 LED A LED for service monitor green 13 V1 Varistor 14 J...

Page 31: ...terminal board 3 E1 E2 Terminal for earth wire 4 HL2 HN2 Connector for HL3 HN3 on main PCB 5 HL4 HN4 Connector for S12 on main PCB 6 FU1 Fuse 3 15 A 250 V 7 FU3 Fuse 30 A 250 V 8 V2 V3 Varistor 9 SW1 Forced cooling operation ON OFF button Refer to page 124 for detail to S50 on main PCB S HL1 HN1 V3 V2 FU3 SW1 FU1 HN4 HL4 HN2 HL2 S11 E1 E2 3P273862 4 ...

Page 32: ... 12 Inverter POWERFUL Operation 34 1 13 Multi Colored Indicator Lamp TIMER Lamp 34 1 14 Clock Setting 36 1 15 WEEKLY TIMER Operation 37 1 16 Other Functions 43 2 Function of Thermistor 44 3 Control Specification 45 3 1 Mode Hierarchy 45 3 2 Frequency Control 46 3 3 Controls at Mode Changing Start up 48 3 4 Discharge Pipe Temperature Control 49 3 5 Input Current Control 50 3 6 Freeze up Protection ...

Page 33: ... by the following 2 parameters The load condition of the operating indoor unit The difference between the room thermistor temperature and the target temperature Additional Control Parameters The target frequency is adapted by additional parameters in the following cases Frequency restrictions Initial settings Forced cooling operation Inverter Principle To regulate the capacity a frequency control ...

Page 34: ...cooling Once the set temperature is reached the energy saving operation enables to maintain the room temperature at low power Frequency Limits The following functions regulate the minimum and maximum frequency Forced Cooling Operation Refer to page 124 for detail Refrigerant circulation rate high high f low f freq variable Refrigerant circulation rate low high speed low speed R2812 Amount of heat ...

Page 35: ...rol Flow Timing Chart 1 Opening the front panel fully Start Running 2 Output of the D signal after the front panel starts moving 4 Making the fan rotate when the flap passes over the fan banned area 3 Opening the flap fully R14049 Fully close OFF Start ON Flap Under running control Under operation mode control Under operation mode control Fan D Fully open Fully open Fully close ON OFF OFF Output O...

Page 36: ...ng heating operation the large flap directs airflow downward to spread the warm air to the entire room Wide Angle Louvers The louvers made of elastic synthetic resin provide a wide range of airflow that guarantees comfortable air distribution Auto Swing The following table explains the auto swing process for cooling dry heating and fan COMFORT AIRFLOW Operation The vertical swing flap is controlle...

Page 37: ...is range when the FAN setting button is set to automatic Cooling The following drawing explains the principle of fan speed control for cooling The upper limit is M tap in 30 minutes from the operation start Heating In heating operation the fan speed is regulated according to the indoor heat exchanger temperature and the difference between the room thermistor temperature and the target temperature ...

Page 38: ...temperature at start up and the target temperature is divided into two zones Then the unit operates in an appropriate capacity for each zone to maintain the temperature and humidity at a comfortable level Room thermistor temperature at start up Target temperature X Thermostat OFF point Y Thermostat ON point Z 24ºC or more Room thermistor temperature at start up X 2 5ºC X 0 5ºC or Y 0 5ºC zone B co...

Page 39: ... set temperature Ts determines the target temperature Tt Ts 18 30 C 2 The target temperature Tt is calculated as Tt Ts C where C is the correction value C 0 C 3 Thermostat ON OFF point and operation mode switching point are as follows Tr means the room thermistor temperature 1 Heating Cooling switching point Tr Tt 3 0 C 2 Cooling Heating switching point Tr Tt 2 5 C 3 Thermostat ON OFF point is the...

Page 40: ...fter being in the zone A The system resumes from defrost control in any zones except A The operation turns on in any zones except A The monitoring time has passed while the temperature difference is in the zone B Cooling Dry 10 minutes Heating 10 seconds Cooling Dry Heating Refer to Temperature Control on page 23 for detail B A OFF ON C Room thermistor temperature target temperature 1 5 C R12319 C...

Page 41: ...hen automatically raises the target temperature slightly in the case of cooling or lowers it slightly in the case of heating This prevents excessive cooling in summer and excessive heating in winter to ensure comfortable sleeping conditions and also conserves electricity Cooling Heating R18034 TIMER operation NIGHT SET Mode ON Target temperature 0 5 C temperature shift Operation stops at the set h...

Page 42: ... wireless remote controller by pushing the ECONO button Detail When this function is activated the maximum capacity also decreases The remote controller can send the ECONO command when the unit is in cooling heating dry or automatic operation This function can only be set when the unit is running Pressing the ON OFF button on the remote controller cancels the function This function and POWERFUL op...

Page 43: ...ons for example in cooling When the microcomputer does not have a signal from the sensor in 20 minutes it judges that nobody is in the room and operates the unit at a temperature shifted from the target temperature cooling dry 1 2 C higher heating 2 C lower automatic according to the operation mode at that time In FAN operation the fan speed is reduced by 60 rpm Others For dry operation you cannot...

Page 44: ...an be monitored even in automatic operation in accordance with the actual operation mode The lamp color changes according to the operation AUTO Red Blue DRY Green COOL Blue HEAT Red FAN White TIMER Orange Operation mode Fan speed Target temperature COOL H tap A rpm 18 C DRY Dry rotating speed A rpm Lowered by 2 5 C HEAT H tap A rpm 31 C FAN H tap A rpm AUTO Same as cooling heating in POWERFUL oper...

Page 45: ...5C is displayed on the LCD 2 Select L light with the Temp or button 3 Press the Mode button to enter the brightness setting mode 4 Press the Temp or button to adjust the brightness of the multi colored indicator lamp 5 Press the Mode button for 5 seconds to exit from the brightness setting mode When the remote controller is left untouched for 60 seconds it returns to the normal mode also R11669 R1...

Page 46: ... or button to set the clock to the current day of the week 3 Press the CLOCK button blinks 4 Press the SELECT or button to set the clock to the present time Holding down the SELECT or button increases or decreases the time display rapidly 5 Press the CLOCK button Point the remote controller at the indoor unit when pressing the button blinks and clock setting is completed R18250 0 00 CLOCK button S...

Page 47: ...hile different timer settings are made for the weekend Tuesday to Friday Program 1 ON Program 2 OFF Program 3 ON Program 4 OFF Program 1 ON Program 1 ON Program 2 OFF Program 2 OFF Program 3 ON Program 3 OFF Program 4 OFF Program 4 ON Use the copy mode to make settings for Tuesday to Friday because these settings are the same as those for Monday Up to 4 reservations per day and 28 reservations per...

Page 48: ...OFF Program 3 ON Program 4 OFF The day of the week and the reservation number of the current day will be displayed 1 to 4 settings can be made per day 2 Press to select the desired day of the week and reservation number The day of the week and reservation number will be set and blink Pressing changes or setting in sequence Pressing alternates the following items appearing on the LCD in rotational ...

Page 49: ...servation screen will appear To continue further settings repeat the procedure from step 4 The multi monitor lamp blinks twice The TIMER lamp periodically lights orange The multi monitor lamp will not blink orange if all the reservation settings are deleted is displayed on the LCD and WEEKLY TIMER operation is activated A reservation made once can be easily copied and the same settings used for an...

Page 50: ...F Tuesday to Friday 2 Press to confirm the day of the week to be copied Be sure to direct the remote controller toward the indoor unit and check for a receiving tone and flashing the multi monitor lamp The reservation will be copied to the selected day of the week The whole reservation of the selected day of the week will be copied To continue copying the settings to other days of the week repeat ...

Page 51: ...vation details To change the confirmed reserved settings select the reservation number and press The mode is switched to setting mode Go to setting mode step 2 To deactivate WEEKLY TIMER operation Press while is displayed on the LCD The will disappear from the LCD The TIMER lamp goes off To reactivate the WEEKLY TIMER operation press again If a reservation deactivated with is activated once again ...

Page 52: ... be deleted All reservations Hold for 5 seconds while normal display 2 Press to select the day of the week and the reservation number to be deleted Pressing changes ON OFF TIMER mode Pressing alternates the following items appearing on the LCD in rotational sequence The reservation will be no setting with selecting blank This function can be used for deleting reservations for each day of the week ...

Page 53: ...de refers to the following table Forced cooling operation Forced cooling operation can be started by pressing the ON OFF button for 5 to 9 seconds while the unit is not operating Refer to page 124 for detail Note When the ON OFF button is pressed for 10 seconds or more the forced cooling operation is stopped 1 16 4 Titanium Apatite Photocatalytic Air Purifying Filter This filter combines the Air P...

Page 54: ...e used in place of the inner temperature of the compressor rises abnormally the operating frequency becomes lower or the operation halts 2 The discharge pipe thermistor is used for detecting disconnection of the discharge pipe thermistor 3 Indoor Heat Exchanger Thermistor 1 The indoor heat exchanger thermistor is used for controlling the target discharge pipe temperature The system sets the target...

Page 55: ...e for installation and servicing Detail Note Unless specified otherwise a dry operation command is regarded as cooling operation Air conditioner control mode Forced operation mode Forced cooling operation for pump down operation Power transistor test mode Normal operation mode Fan Cooling includes drying Heating Heating Defrosting Stop indoor unit OFF Preheating operation Discharging from capacito...

Page 56: ...n upper limit frequency among the frequency upper limits of the following functions Compressor protection input current discharge pipe temperature heating peak cut freeze up protection defrost 3 Determine lower limit frequency The maximum value is set as a lower limit frequency among the frequency lower limits of the following functions Four way valve operation compensation draft prevention pressu...

Page 57: ...uency does not change for more than a certain fixed time the frequency is adjusted according to the D value When the D value is low the frequency is lowered When the D value is high the frequency is increased 3 Frequency management when other controls are functioning When frequency is dropping Frequency management is carried out only when the frequency drops For limiting lower limit Frequency mana...

Page 58: ... when the heating is stopped the OFF delay switch of the four way valve is carried out Detail OFF delay switch of four way valve The four way valve coil is energized for 150 160 seconds after the operation is stopped 3 3 3 Four Way Valve Operation Compensation Outline At the beginning of the operation as the four way valve is switched the pressure difference to activate the four way valve is acqui...

Page 59: ...ertain level the upper limit of frequency is set to keep the discharge pipe temperature from rising further Detail 25 35 class 50 class A Hz 48 55 B Hz 64 70 C Hz 88 85 D seconds 240 120 E seconds 360 200 F seconds 180 470 sec Time R13528 Hz Frequency C B D E F A Zone Control Stop zone When the temperature reaches the stop zone the compressor stops Dropping zone The upper limit of frequency decrea...

Page 60: ... limit of the compressor frequency is defined as operation frequency 2 Hz After this the output frequency is lowered by 2 Hz every second until it reaches the keep zone Keep zone The present maximum frequency goes on Reset zone Limit of the frequency is canceled Limitation of current dropping and stop value according to the outdoor temperature The current drops when outdoor temperature becomes hig...

Page 61: ...e determines the frequency upper limit to prevent abnormal high pressure Detail A C B C C C 9 7 5 R14718 Reset zone Indoor heat exchanger thermistor temperature Up zone Keep zone Dropping zone Stop zone 0 C C C B C A C 13 C Zone Control Stop zone When the temperature reaches the stop zone the compressor stops Dropping zone The upper limit of frequency decreases Keep zone The upper limit of frequen...

Page 62: ...al operation 5 Fan speed control during forced cooling operation The outdoor fan is controlled as well as normal operation during forced cooling operation 6 Fan speed control during POWERFUL operation The rotation speed of the outdoor fan is increased during POWERFUL operation 7 Fan speed control during indoor outdoor unit quiet operation The rotation speed of the outdoor fan is reduced by the com...

Page 63: ... 6 minutes More than A minutes of accumulated time pass after the start of the operation or ending the previous defrosting Conditions for Canceling Defrost The judgment is made with the outdoor heat exchanger temperature B C 25 35 class RXG50K2V1B RXG50K3V1B A minutes 28 44 44 B C 4 18 4 12 4 12 C Hz 76 55 55 D Hz 86 90 90 E seconds 50 60 60 F seconds 60 120 120 G seconds 480 340 340 H seconds 60 ...

Page 64: ...ontrol which function in each operation mode Cooling h h h h h h h h h h h h h h h h h Heating h h h h h h h h h h h h h h h h h h h Holding Functions No Functions Starting control Control when the frequency changes Target discharge pipe temperature control Control for disconnection of the discharge pipe thermistor High discharge pipe temperature control Pressure equalizing control Opening limit c...

Page 65: ...ing defrosting 3 11 4 Starting Operation Control The outdoor electronic expansion valve opening is controlled when the operation starts and prevents the superheating or liquid compression 3 11 5 Control when the Frequency Changes When the target discharge pipe temperature control is active if the target frequency is changed for a specified value in a certain time period the target discharge pipe t...

Page 66: ...eration mode is heating When the following condition is fulfilled the discharge pipe thermistor disconnection is ascertained Discharge pipe temperature 6 C indoor heat exchanger temperature Adjustment when the thermistor is disconnected When the disconnection is ascertained the compressor continues operation for 9 minutes and then stops If the compressor stops repeatedly the system is shut down 3 ...

Page 67: ...ption If the power consumption is below the specified value and the frequency is higher than the specified frequency it is regarded as refrigerant shortage The power consumption is low comparing with that in the normal operation when refrigerant is insufficient and refrigerant shortage is detected by checking power consumption II Detecting by discharge pipe temperature If the discharge pipe temper...

Page 68: ...SiBE041012_B 58 Remote Controller Part 5 Remote Controller 1 FTXG25 35 50JV1BW S A 59 ...

Page 69: ...High Press this button once to start operation Press once again to stop it TEMPERATURE adjustment buttons AUTO DRY COOL HEAT FAN 18 30 C Not available 18 32 C 10 30 C Not available Displays the current settings In this illustration each section is shown with all its displays on for the purpose of explanation To use the remote controller aim the transmitter at the indoor unit If there is anything t...

Page 70: ...while in HEAT operation This function will prevent cold or warm air from directly blowing on your body Press this button and adjust the day and time with the SELECT button Press this button again to complete TIMER setting TIMER CANCEL button Cancels the timer setting It cannot be used for the WEEKLY TIMER operation Changes the ON OFF TIMER and WEEKLY TIMER settings Adjusts the airflow direction Wh...

Page 71: ...tivation Compressor Overload 86 4 14 Compressor Lock 88 4 15 DC Fan Lock 89 4 16 Input Overcurrent Detection 90 4 17 Four Way Valve Abnormality 91 4 18 Discharge Pipe Temperature Control 93 4 19 High Pressure Control in Cooling 94 4 20 Compressor System Sensor Abnormality 95 4 21 Position Sensor Abnormality 97 4 22 DC Voltage Current Sensor Abnormality 25 35 Class Only 100 4 23 CT or Related Abnor...

Page 72: ...SiBE041012_B 62 Service Diagnosis 5 11 Outdoor Fan System Check 118 5 12 Main Circuit Short Check 118 5 13 Capacitor Voltage Check 119 5 14 Power Module Check 120 ...

Page 73: ...n the thermistor malfunctions 2 When a signal transmission error occurs between the indoor and outdoor units In either case conduct the diagnostic procedure described in the following pages Service Monitor The indoor unit has one green LED LED A on the control PCB When the microcomputer works in order the LED A blinks 1 2 Outdoor Unit The outdoor unit has one green LED LED A on the PCB When the mi...

Page 74: ... the outdoor temperature Heating operation cannot be used when the outdoor temperature is 18 CWB or higher and cooling operation cannot be used when the outdoor temperature is below 10 10 CDB depending on the model Diagnose with remote controller indication 68 The unit operates but does not cool or does not heat Check for wiring and piping errors in the connection between the indoor unit and outdo...

Page 75: ...non corresponding codes 2 To return to the normal mode hold the timer cancel button down for 5 seconds When the remote controller is left untouched for 60 seconds it also returns to the normal mode 3 Not all the error codes are displayed When you cannot find the error code try the check method 2 Refer to page 66 No Code No Code No Code 1 00 13 C7 25 UA 2 U4 14 A3 26 UH 3 L5 15 H8 27 P4 4 E6 16 H9 ...

Page 76: ...utton at the same time 5C is displayed on the LCD 2 Select 5C service check with the Temp or button 3 Press the Mode button to enter the service check mode The left side number blinks 4 Press the Temp or button and change the number until you hear the two consecutive beeps or the long beep R11669 R11821 R11672 R11670 R11671 ...

Page 77: ...he Temp or button and change the number until you hear the long beep 8 Diagnose by the sound beep The left side number does not correspond with the error code two consecutive beeps The left side number corresponds with the error code but the right side number does not long beep Both the left side and right side numbers correspond with the error code 9 Determine the error code The numbers indicated...

Page 78: ...elated abnormality 73 Outdoor Unit E1 Outdoor unit PCB abnormality 84 E5 OL activation compressor overload 86 E6 Compressor lock 88 E7 DC fan lock 89 E8 Input overcurrent detection 90 EA Four way valve abnormality 91 F3 Discharge pipe temperature control 93 F6 High pressure control in cooling 94 H0 Compressor system sensor abnormality 95 H6 Position sensor abnormality 97 H8 DC voltage current sens...

Page 79: ...ck the connection of connectors See Note Correct the connection OK Check the power supply voltage Start operation Voltage as rated Error repeats Check the power supply voltage Start operation Voltage as rated Error repeats Error repeats YES NO NO YES NO NO YES R15270 Caution To secure the connection once disconnect the connector and then reconnect it YES NO YES NO YES NO YES Match the compatible m...

Page 80: ...C Heating peak cut control During heating operation the indoor heat exchanger temperature is above 65 C Supposed Causes Short circuited air Clogged air filter of the indoor unit Dust accumulation on the indoor heat exchanger Defective indoor heat exchanger thermistor Defective indoor unit PCB Troubleshooting Check No 01 Refer to P 110 NO NO NO Check No 01 Check the indoor heat exchanger thermistor...

Page 81: ...d to determine abnormal fan motor operation Error Decision Conditions The detected rotation speed does not reach the demanded rotation speed of the target tap and is less than 50 of the maximum fan motor rotation speed Supposed Causes Layer short inside the fan motor winding Breaking of wire inside the fan motor Breaking of the fan motor lead wires Defective capacitor of the fan motor Defective in...

Page 82: ...e fan rotate smoothly Does the fan rotate Is the motor power supply voltage 310 340 VDC generated Is the motor control voltage 15 VDC generated Turn off the power supply and rotate the fan by hand Turn the power on and start operation Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Check No 02 Check the output of the fan motor connector R1...

Page 83: ...r operation Supposed Causes Disconnection of connector Defective thermistor Defective indoor unit PCB Troubleshooting Check No 01 Refer to P 110 C4 Indoor heat exchanger thermistor C9 Room temperature thermistor YES R15717 NO Check No 01 Check the thermistor resistance value YES NO Caution Correct the connection Replace the thermistor Replace the indoor unit PCB Normal Normal Check the connection ...

Page 84: ...til the initialization finishes 4 Operate the unit by the indoor unit ON OFF button YES YES YES YES NO NO NO NO Replace the harness and reduction motor Replace the assembly of the front panel mechanism Check the movement of the right and left separately by hand Replace the assembly of the front panel mechanism It is supposed such as deformation of the panel or stuffed dust Find out the cause Repla...

Page 85: ...on III Refrigerant shortage is detected by checking the difference between suction and discharge temperature Error Decision Conditions Refrigerant shortage detection I The following conditions continue for 7 minutes 25 35 class RXG50K3V1B Input current input voltage A output frequency B Output frequency C RXG50K2V1B Input current D output frequency E Output frequency F Refrigerant shortage detecti...

Page 86: ...the discharge pipe thermistor indoor or outdoor heat exchanger thermistor room or outdoor temperature thermistor Closed stop valve Refrigerant shortage refrigerant leakage Poor compression performance of compressor Defective outdoor electronic expansion valve Operation mode Description K C Cooling room thermistor temperature indoor heat exchanger temperature 4 0 outdoor heat exchanger temperature ...

Page 87: ... the pipe flare or replace the union Check the power transistor harness for loosening Correct it as required Also replace the cracked pipe Check the pipes for improper contact and correct them as required Replace the cracked pipe Replace the outdoor electronic expansion valve Replace the defective thermistor s Completed Refrigerant shortage error again Oil oozing at internal piping Stop valve clos...

Page 88: ...r Unit Low voltage detection The voltage detected by the DC voltage detection circuit is below 150 180 V depending on the model The compressor stops if the error occurs and restarts automatically after 3 minute standby Over voltage detection An over voltage signal is fed from the over voltage detection circuit to the microcomputer The compressor stops if the error occurs and restarts automatically...

Page 89: ... Reconnect the harness Check the power supply voltage Check the connection of the compressor harness Disturbance factors Noise Power supply distortion Repeat a few times Precaution before turning on the power again Make sure the power has been off for at least 30 seconds Replace the indoor unit PCB Turn on the power again System restarted Error again within 3 minutes after turning on the power Loo...

Page 90: ...ecked whether it is normal Error Decision Conditions The data sent from the outdoor unit cannot be received normally or the content of the data is abnormal Supposed Causes Reduction of power supply voltage Wiring error Breaking of the connection wires between the indoor and outdoor units wire No 3 Defective outdoor unit PCB Short circuit inside the fan motor winding Defective indoor unit PCB Distu...

Page 91: ...on wires between the indoor unit and outdoor unit Is LED A blinking Properly insulated Is there any disturbance Is there any wiring error Check the indoor unit outdoor unit connection wires Check the LED A on the outdoor unit PCB Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Before you check the LED A cancel the standby electricity savin...

Page 92: ... sent from the PM1 can not be received for 9 seconds The error counter is reset when the data from the PM1 can be successfully received Supposed Causes Defective outdoor unit PCB Troubleshooting R7185 Caution NO YES Turn off the power and turn it on again Error again Replace the outdoor unit PCB Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be dama...

Page 93: ...necting wires Wrong indoor unit PCB or outdoor unit PCB mounted Defective indoor unit PCB Defective outdoor unit PCB Troubleshooting R11707 Caution NO YES YES YES NO NO Check the code numbers 2P01234 for example of the indoor and outdoor unit PCB with the Parts List Match the compatible models Change for the correct PCB Replace the indoor unit PCB or the outdoor unit PCB OK Matched compatibly Corr...

Page 94: ...all of voltage Momentary power failure Troubleshooting 25 35 class RXG50K3V1B Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged NO YES YES R16910 YES NO NO Replace the outdoor unit PCB 2 Ground the system Zero cross signal abnormality Replace the outdoor unit PCB 1 Replace the harness Check to see if the outdoor unit is grounded Is L...

Page 95: ...e power switch before connecting or disconnecting connectors or parts may be damaged YES NO NO YES Turn on the power again Check to see if the unit is grounded Replace the outdoor unit PCB Ground the system The cause can be external factors other than malfunction Investigate the cause of noise Error again Grounded ...

Page 96: ...Reset condition Continuous run for about 60 minutes without any other error Supposed Causes Disconnection of discharge pipe thermistor Defective discharge pipe thermistor Disconnection of connector S40 Disconnection of 2 terminals of OL Q1L Defective OL Q1L Broken OL harness Defective outdoor electronic expansion valve or coil Defective four way valve or coil Defective outdoor unit PCB Refrigerant...

Page 97: ...e the four way valve or the coil Replace the outdoor unit PCB Discharge pipe thermistor disconnected Check No 01 Check the thermistors Check No 13 Check the four way valve Check No 14 Check the refrigerant line Check No 12 Check the outdoor electronic expansion valve Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged YES NO Disconnect the con...

Page 98: ...error Supposed Causes Compressor locked Compressor harness disconnected Troubleshooting Check No 15 Refer to P 114 Turn off the power Disconnect the harnesses U V and W R18317 Caution NO YES YES NO NO YES Check No 15 Check with the inverter analyzer Turn off the power and reconnect the harnesses Turn on the power again and restart the system Precaution before turning on the power again Make sure t...

Page 99: ... Disconnection of the fan motor Foreign matter stuck in the fan Defective fan motor Defective outdoor unit PCB Troubleshooting Check No 16 Refer to P 116 R15675 Caution YES YES NO YES NO NO YES NO Turn on the power Rotate the fan Check No 16 Check the rotation pulse input on the outdoor unit PCB Turn off the power and reconnect the connector Remove the foreign matters Replace the outdoor fan motor...

Page 100: ...ck No 18 Refer to P 117 Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged An input overcurrent may result from wrong internal wiring If the system is interrupted by an input overcurrent after the wires have been disconnected and reconnected for part replacement check the wiring again R18318 NO YES YES NO Start operation and measure t...

Page 101: ... minutes depending on the model after operating for 5 10 minutes depending on the model Cooling Dry room thermistor temp indoor heat exchanger temp 5 C Heating indoor heat exchanger temp room thermistor temp 5 C If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error Supposed Causes Disconnection of four way valve coil Defective four...

Page 102: ...logged Reconnect the thermistor s Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged R15824 Refrigerant shortage Water mixed Stop valve Four way valve coil disconnected loose Harness out of connector Any thermistor disconnected Check No 01 Check the thermistors Check No 14 Check the refrigerant line Check No 13 Check the four way valv...

Page 103: ...hortage Defective four way valve Water mixed in refrigerant Defective stop valve Defective outdoor unit PCB Troubleshooting Check No 01 Refer to P 110 Check No 12 Refer to P 112 Check No 14 Refer to P 113 A C B C 1 above 45 Hz rising above 40 Hz dropping 110 97 2 30 45 Hz rising 25 40 Hz dropping 105 92 3 below 30 Hz rising below 25 Hz dropping 99 86 A C B C 110 95 R15274 Caution NG OK OK OK NG NG...

Page 104: ...tor Defective outdoor unit PCB Troubleshooting Check No 01 Refer to P 110 Check No 12 Refer to P 112 Check No 17 Refer to P 117 Check No 18 Refer to P 117 Check No 19 Refer to P 118 R18182 Caution Replace the outdoor fan motor Reconnect the connector or fan motor lead wires Replace the stop valve Replace the outdoor heat exchanger thermistor Replace the outdoor unit PCB Replace the outdoor electro...

Page 105: ...t converted to voltage value The DC voltage before compressor start up is below 50 V Supposed Causes Broken or disconnected harness Defective outdoor unit PCB Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged NO R11712 YES Turn off the power and turn it on again YES NO Replace the harness Replace the outdoor unit PCB ...

Page 106: ... Connect the compressor properly NO YES Replace the reactor NO YES Replace the compressor or the compressor relay harness Restart the operation again and if the error occurs again replace the outdoor unit PCB NO YES Disconnect the reactor from the outdoor unit PCB and measure the resistance value between reactor terminals with tester Disconnect the compressor relay harness from the outdoor unit PC...

Page 107: ...gh the position detection circuit Error Decision Conditions If the error repeats the system is shut down Reset condition Continuous run for about 11 minutes 25 35 class or 5 minutes 50 class without any other error Supposed Causes Disconnection of the compressor relay cable Defective compressor Defective outdoor unit PCB Start up failure caused by the closed stop valve Input voltage is outside the...

Page 108: ...YES YES Check No 20 Check the short circuit of the diode bridge Check No 15 Check with the inverter analyzer Turn off the power Disconnect the harnesses U V and W Turn on the power Check the electrolytic capacitor voltage Electrical components or compressor harnesses connected as specified Replace the outdoor unit PCB Replace the compressor Correct the power supply or replace the outdoor unit PCB ...

Page 109: ...ed R18329 NO NO YES NO YES YES Turn off the power Disconnect the harnesses U V and W Turn on the power Check the electrolytic capacitor voltage Electrical components or compressor harnesses connected as specified Replace the outdoor unit PCB Replace the compressor Correct the power supply or replace the outdoor unit PCB Reconnect the electrical components or compressor harnesses as specified 320 5...

Page 110: ...ased on the compressor running frequency and the input current Error Decision Conditions If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error Supposed Causes Defective outdoor unit PCB Troubleshooting Replace the outdoor unit PCB Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts ma...

Page 111: ...frequency and CT detected input current Error Decision Conditions The compressor running frequency is more than A Hz and the CT input current is less than B A If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error Supposed Causes Defective power module Broken or disconnected wiring Defective reactor Defective outdoor unit PCB A Hz B...

Page 112: ...nd restart operation Check No 15 Check with the inverter analyzer Inverter analyzer RSUK0917C Replace the outdoor unit PCB Replace the outdoor unit PCB Replace the outdoor unit PCB Check the power supply voltage Replace the compressor Capacitor charged when the indoor unit or outdoor unit main relay turns on Rising with increasing frequency Correct the power supply or replace the outdoor unit PCB ...

Page 113: ...r on J3 error is judged if the discharge pipe temperature is lower than the heat exchanger temperature Supposed Causes Disconnection of the connector for the thermistor Defective thermistor corresponding to the error code Defective heat exchanger thermistor in the case of J3 error outdoor heat exchanger thermistor in cooling operation or indoor heat exchanger thermistor in heating operation Defect...

Page 114: ...ermistor s of the following thermistors Outdoor temperature thermistor Discharge pipe thermistor Outdoor heat exchanger thermistor Cooling Outdoor heat exchanger temperature Heating Indoor heat exchanger temperature Replace the indoor heat exchanger thermistor Replace the outdoor unit PCB Error displayed again on remote controller Indoor heat exchanger thermistor functioning Check No 01 Check the ...

Page 115: ...ve outdoor unit PCB Troubleshooting Check No 17 Refer to P 117 Check No 19 Refer to P 118 A C B C C C 25 35 class 98 75 83 RXG50K2V1B 95 80 85 RXG50K3V1B 122 64 113 Caution WARNING To cool the electrical components the outdoor fan starts when the radiation fin temperature rises above C C and stops when it drops below B C R14444 YES NO Slightly dirty NG Too dirty OK NO YES Turn off the power and tu...

Page 116: ...r on is above A C The error is cleared when the radiation fin temperature drops below B C If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error Supposed Causes Defective outdoor fan motor Short circuit Defective radiation fin thermistor Disconnection of connector Defective outdoor unit PCB Silicon grease is not applied properly on ...

Page 117: ...eck the installation condition NO YES YES Above A C Radiation fin dirty Check No 19 Check the outdoor fan or related Error displayed again Has the PCB been replaced Check if silicon grease is applied properly on the radiation fin If not apply the silicon grease Replace the outdoor unit PCB Clean up the radiation fin Be sure to turn off the power switch before connecting or disconnecting connectors...

Page 118: ...running A speed error occurs while the compressor is running An output overcurrent signal is fed from the output overcurrent detection circuit to the microcomputer If the error repeats the system is shut down Reset condition Continuous run for about 11 minutes 25 35 class or 5 minutes 50 class without any other error Supposed Causes Poor installation condition Closed stop valve Defective power mod...

Page 119: ...ff the power and reconnect the harnesses Turn on the power again and start operation Turn off the power and turn it on again to start the system See if the same error occurs Check the power supply voltage Monitor the power supply voltage discharge and suction pressures and other factors for a long term Possible causes Momentary fall of power supply voltage Compressor overload Short circuit Keep on...

Page 120: ... temperature thermistor is directly mounted on the display PCB remove the display PCB from the control PCB to measure the resistance When the connector of the indoor heat exchanger thermistor is soldered on the PCB remove the thermistor and measure the resistance Thermistor temperature C Resistance kΩ 20 197 8 15 148 2 10 112 1 5 85 60 0 65 93 5 51 14 10 39 99 15 31 52 20 25 02 25 20 00 30 16 10 3...

Page 121: ...s 4 1 5 3 Power Supply Waveforms Check Check No 11 Measure the power supply waveform between No 1 and No 2 on the terminal board and check the waveform disturbance Check to see if the power supply waveform is a sine wave Fig 1 Check to see if there is waveform disturbance near the zero cross sections circled in Fig 2 7 6 5 4 3 2 1 S200 R14962 Motor power supply voltage 310 340 VDC Unused Unused GN...

Page 122: ...generates a latching sound 3 If the EV does not generate a latching sound in the above step 2 disconnect the connector and check the continuity using a tester 4 Check the continuity between the pins 1 6 2 6 3 6 and 4 6 If there is no continuity between the pins the EV coil is faulty 5 If the continuity is confirmed in step 3 the outdoor unit PCB is faulty Note Please note that the latching sound v...

Page 123: ...il Cooling Dry No continuity Heating Continuity Replace the outdoor unit PCB Replace the four way valve coil Replace the four way valve Four way valve coil resistance at 1000 2000 Ω S80 voltage at 220 240 VAC with compressor on Fig 1 R11904 Fig 1 Voltage at S80 220 240 VAC Time Compressor ON Refrigerant system check Check for refrigerant leakage See the service diagnosis on refrigerant shortage U0...

Page 124: ...the charged voltage of the built in smoothing electrolytic capacitor drops to 10 VDC or below before carrying out the service work Reference If the terminals of the compressor are not FASTON terminals difficult to remove the wire on the terminals it is possible to connect wires available on site to the outdoor unit from output side of PCB Do not connect them to the compressor at the same time othe...

Page 125: ...PCB If OK in Check No 22 check if there is any solder cracking on the PCB 4 If any solder cracking is found replace the PCB or repair the soldered section If there is no solder cracking replace the PCB Caution 1 When the output frequency is low the LEDs blink slowly As the output frequency increases the LEDs blink quicker The LEDs look like they are lit 2 On completion of the inverter analyzer dia...

Page 126: ... Check that the rotation command voltage between the pins 2 4 is 0 15 VDC 5 Keep operation off and power off Connect the connector S70 6 Check whether 2 pulses 0 15 VDC are output at the pins 1 4 when the fan motor is rotated 1 turn by hand When the fuse is melted check the outdoor fan motor for proper function If NG in step 2 Defective PCB Replace the outdoor unit PCB If NG in step 4 Defective Ha...

Page 127: ...rty Change the installation location or direction Change the installation location or direction Clean the outdoor heat exchanger Change the installation location or direction Check the outdoor temperature The outdoor temperature should be within the operation range R15738 Not dirty YES YES Dirty NO NO NO YES Is the air filter or indoor outdoor heat exchanger dirty Is the connection pipe deformed I...

Page 128: ...f the resistance is or less than 1 kΩ short circuit occurs on the main circuit 25 35 class R15001 YES YES NO NO Outdoor fan system is functioning Check the outdoor fan system Go to Check No 16 Outdoor fan running Fan motor lead wire connector disconnected Reconnect the connector Negative terminal of tester positive terminal for digital tester 2 3 4 2 3 1 Positive terminal of tester negative termin...

Page 129: ... 21 RXG50K2V1B only Before this check be sure to check the main circuit for short circuit With the circuit breaker still on measure the voltage according to the drawing of the model in question Be careful never to touch any live parts Tester 1 2 3 4 R14700 Multimeter DC voltage range R18183 ...

Page 130: ...ector Follow the procedure below to measure resistance between the terminals of the power module and the terminals of the compressor with a multi tester Evaluate the measurement results referring to the following table 25 35 class Negative terminal of tester positive terminal for digital tester Power module UVW Power module UVW Positive terminal of tester negative terminal for digital tester UVW P...

Page 131: ...SiBE041012_B Check Service Diagnosis 121 RXG50K2V1B RXG50K3V1B R16073 Power module Power module R16692 ...

Page 132: ...n 123 2 Forced Cooling Operation 124 3 Trial Operation 126 4 Field Settings 127 4 1 When 2 Units are Installed in 1 Room 127 4 2 Standby Electricity Saving 128 4 3 Facility Setting Jumper cooling at low outdoor temperature 129 4 4 Jumper and Switch Settings 130 5 Silicon Grease on Power Transistor Diode Bridge 131 ...

Page 133: ...t Detail 1 Remove the valve caps from the liquid stop valve and the gas stop valve 2 Carry out forced cooling operation 3 After 5 to 10 minutes close the liquid stop valve with a hexagonal wrench 4 After 2 to 3 minutes close the gas stop valve and stop the forced cooling operation Refer to page 124 for forced cooling operation Gas stop valve Valve cap Close Liquid stop valve Service port R13628 He...

Page 134: ...nit for 5 seconds 2 Press the forced cooling operation ON OFF switch SW1 on the outdoor unit 25 35 class with standby electricity saving function turned off Command frequency 25 35 class 58 Hz 50 class 66 Hz End The forced cooling operation ends when any of the following conditions is fulfilled 1 The operation ends automatically after 15 minutes 2 Press the forced cooling operation ON OFF button S...

Page 135: ...K2V1B Outdoor Unit RXG50K3V1B Caution When pressing the switch do not touch the terminal board It has a high voltage and may cause electric shock LED A SW4 ON A B CD S102 SW1 S2 R14963 Forced cooling operation ON OFF switch 1 2 3 Screwdriver R18725 Forced cooling operation ON OFF switch SW1 Push ...

Page 136: ...arts operation with the previous operation mode when the circuit breaker is restored In cooling operation select the lowest programmable temperature 18 C in heating operation select the highest programmable temperature 30 C Trial operation may be disabled in either operation mode depending on the room temperature After trial operation is complete set the temperature to a normal level 26 C 28 C in ...

Page 137: ...oller can be set for different addresses Both the indoor unit PCB and the wireless remote controller need alteration Indoor Unit PCB 1 Remove the front panel and front grille 4 screws 2 Cut the address setting jumper JA on the signal receiver display PCB Wireless Remote Controller 1 Remove the cover and take it off 2 Cut the address setting jumper JA Bottom of electrical box ADDRESS JA EXIST 1 CUT...

Page 138: ...procedure is required for turning ON the function 1 Check that the main power supply is turned OFF Turn OFF if it has not been turned OFF 2 Remove the stop valve cover 3 Disconnect the selective connector for standby electricity saving 4 Turn ON the main power supply Caution 1 Before connecting or disconnecting the selective connector for standby electricity saving make sure that the main power su...

Page 139: ...n starts again Caution 1 If the outdoor unit is installed where the outdoor heat exchanger of the unit is exposed to direct wind provide a windbreak wall 2 Intermittent noises may be produced by the indoor unit due to the outdoor fan turning on and off when using facility settings 3 Do not place humidifiers or other items which might raise the humidity in rooms where facility settings are being us...

Page 140: ...set When cut Fan speed setting when compressor stops for thermostat OFF effective only at cooling operation JB on indoor unit PCB Fan speed setting Remote controller setting Fan speed setting 0 The fan stops Power failure recovery function JC on indoor unit PCB Auto restart The unit does not resume operation after recovering from a power failure Timer settings are cleared Function Switch Jumper Sw...

Page 141: ... bridge Detail 1 Wipe off the old silicon grease completely 2 Apply the silicon grease evenly See the illustrations below for examples of application 3 Tighten the screws of the power transistor diode bridge 4 Make sure that the heat radiation parts are firmly contacted to the radiation fin Note Smoke emission may be caused by bad heat radiation when the silicon grease is not appropriately applied...

Page 142: ...SiBE041012_B 132 Appendix Part 8 Appendix 1 Piping Diagrams 133 1 1 Indoor Unit 133 1 2 Outdoor Unit 133 2 Wiring Diagrams 135 2 1 Indoor Unit 135 2 2 Outdoor Unit 135 3 Removal Procedure Booklet No 137 ...

Page 143: ...OR FIELD PIPING 12 7CuT 9 5CuT REFRIGERANT FLOW COOLING HEATING THERMISTOR ON HEAT EXCH 4D065856C OUTDOOR UNIT HEAT EXCHANGER 7 0CuT 7 0CuT 9 5CuT EV 4 8CuT 6 4CuT 6 4CuT 4 8CuT M PROPELLER FAN 9 5CuT 9 5CuT 6 4CuT 7 9CuT 9 5CuT MUFFLER 9 5CuT 9 5CuT COMPRESSOR MUFFLER MUFFLER 7 9CuT ACCUMULATOR REFRIGERANT FLOW COOLING HEATING OUTDOOR TEMPERATURE THERMISTOR HEAT EXCHANGER THERMISTOR DISCHARGE PIP...

Page 144: ...T CAPILLARY TUBE 2 CAPILLARY TUBE 3 4 0CuT 4 0CuT CAPILLARY TUBE 4 OUTDOOR TEMPERATURE THERMISTOR FOUR WAY VALVE ON HEATING 3D051637Y OUTDOOR UNIT HEAT EXCHANGER 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 12 7CuT CAPILLARY TUBE 1 CAPILLARY TUBE 2 CAPILLARY TUBE 3 CAPILLARY TUBE 4 7 9CuT 4 0CuT 7 9CuT 4 0CuT 7 9CuT 7 9CuT REFRIGERANT FLOW 6 4CuT COOLING 7 9CuT 4 0CuT HEATING 6 4CuT 4 0CuT 6 4CuT M PROPELLE...

Page 145: ...WHT IPM1 FU3 Z3C X1M DB1 L1R HR1 20A HR2 AC1 L1 BRN L 1 BLK 1 MRM10 AC2 HN3 V2 WHT 2 N 2 DB2 HN2 C5 HA1 HA2 S BLU GRY 3 RED 3 HL3 C119 HL2 V3 ORG C6 FU1 L Q1 MR30 3 15A 1 WHT 1 V1 BLK N PCB2 DB3 BLK FU2 GRN YLW BLK 3 15A SA1 S11 S10 BLK BLK E1 W V U BLK IPM2 BLK 9 9 BLK MR30_B E2 MRCW GRN BLU RED YLW S70 S100 S50 Z2C S90 S20 S40 PCB1 X11A S80 1 3 3 1 1 2 11 1 10 12 7 13 4 1 6 1 1 6 2 N 2 GRN OUTDO...

Page 146: ...0 MRC W R1T R3T S2 S102 LEDA MAGNETIC RELAY THERMISTOR CONNECTOR PILOT LAMP L N SW1 SW4 LIVE NEUTRAL FORCED OPERATION ON OFF SW SW1 LOCAL SETTING SW SW4 M1C M1F L1R Q1L PM1 PCB1 2 Y1R SHEET METAL COMPRESSOR MOTOR FAN MOTOR REACTOR OVERLOAD PROTECTOR POWER MODULE PRINTED CIRCUIT BOARD REVERSING SOLENOID VALVE COIL TERMINAL STRIP FIXED PLATE 3D056095G indoor TO INDOOR UNIT FIELD WIRING POWER SUPPLY ...

Page 147: ...Removal Procedure Booklet No Refer to the following booklets for removal procedure FTXG25 35 50JV1BW S A Refer to Si041256 RXG25 35J2V1B RXG25 35K2V1B Refer to Si001156 RXG25 35K3V1B Refer to Si001273 RXG50K2V1B Refer to Si001164 RXG50K3V1B Refer to Si001274 ...

Page 148: ...story Month Year Version Revised contents 04 2010 SiBE041012 First edition 06 2011 SiBE041012_A Model addition FTXG50JV1BW S RXG25 35 50K2V1B 12 2012 SiBE041012_B Model addition FTXG25 35 50JV1BA RXG25 35 50K3V1B ...

Page 149: ...es supplied or specified by Daikin Ask a qualified installer or contractor to install those parts and accessories Use of unauthorised parts and accessories or improper installation of parts and accessories can result in water or refrigerant leakage electrical shock fire or explosion z Read the User s Manual carefully before using this product The User s Manual provides important safety instruction...

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