Related Manuals for Daikin FTXN-LV
Summary of Contents for Daikin FTXN-LV
- Page 1 TS13-01 Troubleshooting Manual Inverter Split Wall mounted Type L-Series Heat pump: Indoor unit: FTXN-LV Outdoor unit: RXN-LV...
- Page 2 1.0 Introduction Inverter Air conditioning technology is today’s solution for superior comfort, higher efficiency and better energy saving. Daikin Inverter included Residential, Light Commercial and Multi Split Unit. INVERTER Y SINGLE SPLIT (Residential, Light Commercial) INDOORS OUTDOORS 1.1 INVERTER Y SINGLE SPLIT Residential (FTXN-LV &...
- Page 3 Disable Auto Random Restart function: Series I Series II To disable the auto random restart function, kindly cut off the jumper J_AUTO as highlighted in attachment. Please be informed that after disable auto random restart, unit is not able to restart with last state memory after power resume from failure.
- Page 4 2.0 Algorithm and Control INDOOR BASIC FUNCTIONS Residential and Light Commercial The system has 5 operating modes. The mode selection is done from indoor using handset. The operating modes are: • Cool • Heat • • Auto • Cool Mode: When Tr ≥...
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Page 5: Fan Mode
Heat Mode: When Ts > Tr - 1.0°C • Comp, ID Fan and OD Fan ON. When Tr ≥ Ts + 1.5°C • Compressor and Outdoor Fan OFF. • Indoor Fan off if indoor coil ≤ 20°C. Tr = Room Temperature Ts = Set Temperature When heating load is too small, and the room temperature still rising above compressor cut off point, compressor will stop. - Page 6 ID-OD COMMUNICATION Master by outdoor unit. Indoor controller board will transmit signal to outdoor controller board every 0.5s. Outdoor unit will response to indoor once the valid data is received. If the data communication line between indoor and outdoor disrupted for 15s continuously, compressor will stop, OD fan stop with fan OFF timer.
- Page 7 THERMISTORS IN RXN-LV FUNCTIONS OF THERMISTOR Thermistor Functions Used for discharge superheat (SH) & EXV control. Also used for crankcase Discharge pipe heater/ preheating control in Series 2 model. Used for defrost control. Also used for inverter current protection control in Outdoor coil Series II.
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Page 8: Auto Restart
MINIMUM RUN CONTROL To prevent frequent compressor ON/OFF & to allow pressure equalization • The compressor will be on 3 minutes stand-by after turning OFF before it is allowed to turn ON. • OD fan OFF delay to improve pressure equalization & to prevent refrigerant from entering into evaporator. -
Page 9: Defrost Control
FTXN-LV and RXN-LV: DEFROST CONTROL Condition for entering defrost • Compressor minimum run time – 6 minutes OR • Compressor accumulated run time of 45 minutes if OD coil < 3C. • When OD coil < 0C AND OD coil < OD air - 10C. -
Page 10: Rotation Regulating Functions
ROTATION REGULATING FUNCTIONS Upper limit rotation Limit Rotation Command Rotation Target Rotation Lower limit rotation Starting Rotation ∆T Defrost* * Defrost control for heat pump model only STARTING ROTATION STARTING CONTROL To avoid excessive oil discharge from compressor or to promote oil lubrication during startup. To prevent liquid flood back to the compressor. - Page 11 RXN60LV1B 93 Hz COMMAND ROTATION Cut in upon termination of Starting Control. Achieve capacity control by controlling the compressor rotation based on : Temperature difference between set and room temperature, T. • • Limit Rotation. • Defrost control. Fuzzy Control Based on temperature difference, T, current fan speed setting &...
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Page 12: High Pressure Protection
A minimum value was determined among the upper limits rotation, i.e. protection controls. • Lower limit rotation A maximum value was determined among the lower limits rotation, i.e. protection controls. Generally, compressor rotation is controlled within 4 zones: stop, drop, keep, up and reset subjected to a particular operating temperature/current/pressure. -
Page 13: Discharge Pipe Temperature Control
The compressor frequency is adjusted based on coil temperature: • During cooling mode – outdoor coil temperature. • During heating mode – indoor coil temperature. This protection is activated when the coil temperature > 64°C, the compressor stop and OD fan stop after 30s. -
Page 14: Overall Current Control
OVERALL CURRENT CONTROL To monitor the overall current and to restrict the compressor upper limit rotation in order to prevent circuit breakers from exceeding the rated capacity. Detected during compressor running. Model RXN50LV1B 12.0A RXN60LV1B 12.0A When the input current for running compressor exceeds L2, running frequency will be reduced by 1 step. If current still exceeds L2, frequency will be reduced by another 1 step until total current falls between L2 and L3. -
Page 15: Service Diagnosis
Entering condition: • Compressor rotation < 35 Hz, at the end of a 20 minutes timer: set lower limit rotation to 35 Hz & EXV opening is fixed at current opening + 50 pulse. This control is reset when rotation > 35 •... -
Page 16: To Retrieved Last State Error
ON TIMER CANCEL OFF TIMER CANCEL 1. Hold down ON TIMER CANCEL or OFF TIMER CANCEL for 5 seconds until “ ” indication flashes on the handset temperature display section. 2. Then, press the same button repeatedly. A series of error code will appear until ID buzzer produces a long beep. - Page 17 8) Repeat the normal step to retrieve error. (by using remote controller step. Holding TIMER CANCEL…) Using wired handset BRC51A61: The error will show at the LCD display. BRC51A61 can retrieved last state memory by : Press SLEEP & TIMER ACTIVE simultaneously for 5 seconds and the error will be flashed. TS13-01 Troubleshooting manual...
- Page 18 Error code description for Y-series Inverter: ERROR CODE ERROR DESCRIPTION RXN50,60 LV1B RXN25,35LV1B √ √ Normal √ √ INDOOR PCB ERROR √ DRAIN PUMP ABNORMAL √ √ ANTIFREEZE PROTECTION √ √ INDOOR FAN MOTOR ABNORMAL √ AIR SWING MOTOR LOCK INDOOR HEAT EXCHANGER √...
- Page 19 √ OUTDOOR PCB ERROR √ COMPRESSOR OVERLOAD COMPRESSOR LOCK /START-UP √ √ ERROR √ OUTDOOR FAN MOTOR LOCK √ √ AC INPUT OVER CURRENT √ 4 WAY VALVE ERROR √ √ DISCHARGE PIPE OVERHEAT √ √ HEAT EXCHANGER OVERHEAT COMPRESSOR SENSOR SYSTEM √...
- Page 20 √ √ DC VOLTAGE OUT OF RANGE √ √ COMMUNICATION ERROR √ √ INSTALLATION ERROR Error Code: Description Indoor unit PCB abnormality Supposed Cause 1) Faulty indoor PCB 2) Faulty connector connection at indoor Troubleshooting Description Water Pump Error TS13-01 Troubleshooting manual...
- Page 21 Supposed Cause 1.) Faulty drain pump or float switch 2.) Improper drain piping work or drain pipe blockage Troubleshooting TS13-01 Troubleshooting manual...
- Page 22 Description Anti-freeze protection or High Pressure Control Supposed Cause 1) Indoor air filter, heat exchanger block due to dust accumulation. 2) Indoor air short circuit. 3) Indoor coil thermistor faulty. 4) Indoor PCB faulty. 5) Fan blower dirty Troubleshooting TS13-01 Troubleshooting manual...
- Page 23 TS13-01 Troubleshooting manual...
- Page 24 TS13-01 Troubleshooting manual...
- Page 25 Description Fan Motor or Related Abnormality Supposed Cause 1) Indoor fan motor winding short, or the motor lead wire broken 2) Indoor PCB faulty. Troubleshooting TS13-01 Troubleshooting manual...
- Page 26 Description Indoor Coil Thermistor short/ open Supposed Cause 1) Thermistor , connector faulty 2) Indoor PCB faulty Troubleshooting Description Indoor Room Thermistor Short /Open Supposed Cause 1) Thermistor , connector faulty 2) Indoor PCB faulty Troubleshooting TS13-01 Troubleshooting manual...
- Page 27 TS13-01 Troubleshooting manual...
- Page 28 Description Outdoor PCB error Supposed Cause 1. Micro Controller program run-away due to external factor such as Noise, Momentary voltage drop, Momentary power failure. 2. Damage of EEPROM 3. Faulty outdoor unit PCB Troubleshooting Check the outdoor condition Power on and off again Replace outdoor PCB Error Again? Carry grounding work...
- Page 29 Description High Pressure protection Supposed Cause 1) faulty high pressure switch , connector or wire harness 2) Indoor filter, outdoor coil dirty. 3) Outdoor fan not running, unit overcharge, stop valve is closed. Troubleshooting TS13-01 Troubleshooting manual...
- Page 30 Description Low Pressure protection Supposed Cause 1.) faulty high pressure switch , connector or wire harness 2.) Indoor filter, outdoor coil dirty. 3.) Outdoor fan not running, unit overcharge, stop valve is closed. Troubleshooting TS13-01 Troubleshooting manual...
- Page 31 Description Compressor Overload detected through compressor OL Supposed Cause Refrigerant Shortage 4 way valve malfunction Outdoor unit PCB defective Water mixed in the local piping Electronic expansion valve defective Troubleshooting TS13-01 Troubleshooting manual...
- Page 32 Description Compressor lock Supposed Cause The system will be shut down if the error occurs 16 times. Compressor locked Compressor harness disconnect Troubleshooting Turn off the power. Disconnect the harness U, V and W Check with the inverter checker Correct the power supply Normal? Turn off the power and reconnect the harness.
- Page 33 Description DC Fan Lock Supposed Cause -Fan motor breakdown -Harness or connector disconnected between fan motor and PCB or in poor contact Troubleshooting TS13-01 Troubleshooting manual...
- Page 34 Description Input Over Current Detection Supposed Cause -over current due to compressor failure -over current due to defective outdoor unit PCB -over current due to defective power transistor -over current due to short-circuit Troubleshooting Measure the input current Input current flowing Replace the outdoor unit above its stop level? Check outdoor fan motor,...
- Page 35 Description EXV error Supposed Cause EXV faulty EXV connected wrongly Troubleshooting Description 4 way valve error Supposed Cause Thermistor defective Connector in poor contact 4 way valve defective Outdoor PCB defective Insufficient gas Foreign substance mixed in refrigerant TS13-01 Troubleshooting manual...
- Page 36 Troubleshooting 4 way valve coil or harness disconnected / Reconnect loose ? Check the continuity of the 4 way valve coil and harness Disconnect the harness Replace the 4 way from the connector. valve coil Resistance between harness about 3kΩ ? Check the 4 way valve Replace outdoor switching output.
- Page 37 Description Discharge pipe overheat Supposed Cause Refrigerant shortage Four way valve malfunctioning Discharge pipe thermistor defective Outdoor PCB defective Water mixed in the local piping EXV defective Stop Valve defective Troubleshooting Description Heat exchanger overheat Supposed Cause The installation space is not large enough Faulty outdoor unit fan Faulty EXV Faulty defrost thermistor...
- Page 38 Troubleshooting TS13-01 Troubleshooting manual...
- Page 39 Description Compressor sensor system error Supposed Cause -Reactor disconnection -Compressor disconnection -Outdoor unit PCB defective -Compressor defective Troubleshooting TS13-01 Troubleshooting manual...
- Page 40 Description Compressor feedback detection error Supposed Cause Compressor relay cable disconnected Compressor itself defective Outdoor PCB defective Stop valve closed Input voltage out of specification Troubleshooting Check for short circuit Replace the outdoor unit Normal PCB, outdoor unit fan Check the electrolytic capacitor voltage Compressor harness connected as specified? Reconnect as specified...
- Page 41 Description AC current sensor error Supposed Cause Internal wiring broken Outdoor unit PCB defective Troubleshooting TS13-01 Troubleshooting manual...
- Page 42 H9, J3,J5, J6,J7, J8, J9, P4 Description Thermistor or related abnormality H9 : Outdoor air thermistor short/open J3 : Compressor discharge pipe thermisotr short/open J5 : Suction pipe thermistor short/open J6 : Outdoor heat exchanger thermistor short/open J7 : Subcooling heat exchanger thermistor short/open J8: Liquid pipe thermistor short/open J9 : Gas pipe thermistor short/open P4: Heat sink thermistor short/open...
- Page 43 Description Outdoor control box overheat Supposed Cause Fin temperature rise due to defective outdoor unit fan Fin temperature rise due to short circuit Fin thermistor defective Connector in poor contact Outdoor unit PCB defective Troubleshooting TS13-01 Troubleshooting manual...
- Page 44 Description Heat sink overheat Supposed Cause - Fin temperature rise due to short circuit - Fin temperature rise due to defective outdoor unit fan - Fin thermistor defective - Connector in poor contact - Outdoor unit PCB defective - Silicon grease is not applied properly on the hat radiation fin after replacing outdoor unit PCB.
- Page 45 Description IPM error/IGBT error Supposed Cause Over current due to defective power transistor Over current due to wrong internal wiring Over current due to abnormal supply voltage Over current due to defective PCB Error detection due to defective PCB Over- current due to closed stop valve Over current due to compressor failure Over current due to poor installation condition Connection between main board and IPM board is not properly connect...
- Page 46 Troubleshooting TS13-01 Troubleshooting manual...
- Page 47 Description DC voltage out of range Supposed Cause Supply voltage not as specified DC voltage detection circuit defective Troubleshooting Check the supply voltage Supply voltage as Correct the power supply specified? Change outdoor Description Communication error (between indoor and outdoor) Supposed Cause Faulty outdoor unit PCB Faulty indoor unit PCB...
- Page 48 TS13-01 Troubleshooting manual...
- Page 49 Description Communication error (outdoor PCB & IPM PCB) Supposed Cause Wrong models interconnected Wrong indoor unit PCB mounted Indoor unit PCB defective Wrong outdoor unit PCB mounted or defective Troubleshooting Check the models number Check the combination of the models TS13-01 Troubleshooting manual...
- Page 50 4.0 Wiring Connection FTXN 25/35 LV1B RXN 25/35 LV1B TS13-01 Troubleshooting manual...
- Page 51 FTXN 50/60 LV1B RXN50/60 LV1B TS13-01 Troubleshooting manual...
- Page 52 Refrigerant Diagram: FTXN 25/35 LV1B RXN 25/35 LV1B FTXN 50/60 LV1B RXN50/60 LV1B TS13-01 Troubleshooting manual...
- Page 53 Appendix: Resistance value when 25C : RXN50/60 LV1B RXN 25/35 LV1B Indoor CC,CK, CM ------ Outdoor Table 1: Resistance R25 = 10K ohm TS13-01 Troubleshooting manual...
- Page 54 Table 2: Resistance R25 = 20K ohm Temperature (C) Resistance value (k) 211.0 150.0 116.5 88.0 67.2 51.9 40.0 31.8 25.0 20.0 16.0 13.0 10.6 TS13-01 Troubleshooting manual...