Fujitsu AU*G30LRLE series Service Instruction
Fujitsu AU*G30LRLE series Service Instruction

Fujitsu AU*G30LRLE series Service Instruction

Cassette type duct type ceiling type inverter
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SERVICE
INSTRUCTION
R410A
SPLIT TYPE
ROOM AIR CONDITIONER

Cassette type

Duct
Ceiling
Models
Indoor unit
AU* G30LRLE
AR* G30LMLE
AB* G30LRTE
AU* G36LRLE
AR* G36LMLE
AB* G36LRTE
type
type
INVERTER
Outdoor unit
AO* G30LETL
AO* G36LETL

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Table of Contents
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Summary of Contents for Fujitsu AU*G30LRLE series

  • Page 1: Cassette Type

    SPLIT TYPE ROOM AIR CONDITIONER Cassette type Duct type Ceiling type INVERTER SERVICE INSTRUCTION Models Indoor unit Outdoor unit AU* G30LRLE AO* G30LETL AR* G30LMLE AO* G36LETL AB* G30LRTE AU* G36LRLE AR* G36LMLE AB* G36LRTE R410A...
  • Page 2: Table Of Contents

    CONTENTS 1. DESCRIPTION OF EACH CONTROL OPERATION 1. COOLING OPERATION..................... 01-01 2. HEATING OPERATION....................01-02 3. DRY OPERATION...................... 01-02 4. AUTO CHANGEOVER OPERATION................. 01-03 5. INDOOR FAN CONTROL................... 01-04 6. OUTDOOR FAN CONTROL..................01-08 7. COMPRESSOR CONTROL..................01-09 8. TIMER OPERATION CONTROL................01-10 9.
  • Page 3: Description Of Each Control Operation

    R410A Cassette/ Duct/ Ceiling type INVERTER 1 . DESCRIPTION OF EACH CONTROL OPERATION...
  • Page 4: Cooling Operation

    1. COOLING OPERATION 1-1 COOLING CAPACITY CONTROL A sensor (room temperature thermistor) built in the indoor unit body will usually perceive difference or variation between a set temperature and present room temperature, and controls the operation frequency of the compressor. * If the room temperature is 2°C higher than a set temperature, the compressor operation frequency will attain to maximum performance.
  • Page 5: Heating Operation

    2. HEATING OPERATION 2-1 HEATING CAPACITY CONTROL A sensor (room temperature thermistor) built in the indoor unit body will usually perceive difference or variation between a set temperature and present room temperature, and controls the operation frequency of the compressor. * If the room temperature is lower by 3°C than a set temperature, the compressor operation frequency will attain to maximum performance.
  • Page 6: Auto Changeover Operation

    4. AUTO CHANGEOVER OPERATION When the air conditioner is set to the AUTO mode by remote control, operation starts in the optimum mode from among the HEATING, COOLING, DRY and MONITORING modes. During operation, the optimum mode is automatically switched in accordance with temperature changes. The temperature can be set between 18°C and 30°C in 1°C steps.
  • Page 7: Indoor Fan Control

    5. INDOOR FAN CONTROL 1. Fan speed ( Table 4 : Indoor Fan Speed ) Speed (rpm) Operation mode Air flow mode AU* G30LRLE AU* G36LRLE High Heating Med+ Quiet Cool air prevention S-Low Cooling/ Fan High Quiet *Soft Quiet S-Low *Note, during Economy operation and operation mode is Fan, air flow is 1 step downs.
  • Page 8 2. FAN OPERATION The airflow can be switched in 5 steps such as AUTO, Quiet, Low, Med, High, while the indoor fan only runs. When Fan mode is set at [AUTO], it operates on [Med] Fan Speed. 3. COOLING OPERATION Switch the airflow [AUTO], and the indoor fan motor will run according to a room temperature, as shown in Fig.
  • Page 9 6. COOL AIR PREVENTION CONTROL (Heating mode) The maximum value of the indoor fan speed is set as shown in Fig. 5, based on the detected temperature by the indoor heat exchanger sensor on heating mode. ( Fig. 5 : Cool Air Prevention Control ) [ AU* G30/ 36LRLE, AB* G30/ 36LRTE ] Indoor heat exchanger Indoor heat exchanger...
  • Page 10 7. MOISTURE RETURN PREVENTION CONTROL (Cooling mode& Dry mode) The indoor fan motor will run as shown in Fig. 6. ( Fig. 6 : Indoor Fan Control ) Compressor Indoor fan Setting air flow Indoor fan (as shown in Table 5) S-Lo (SEC) ( Table 5 : Indoor fan speed )
  • Page 11: Outdoor Fan Control

    6. OUTDOOR FAN CONTROL 1. Outdoor Fan Motor The Table 6 shows the type of the outdoor fan motor. The control method is different between AC motor and DC motor. ( Table 6 : Type of Motor ) AC Motor DC Motor AO*G30/ 36LETL 2.
  • Page 12: Compressor Control

    7. COMPRESSOR CONTROL 1. OPEARTION FREQUENCY RANGE The operation frequency of the compressor is different based on the operation mode as shown in the Table 9. (Table 9 : Compressor Operation Frequency Range) Cooling Heating AO*G30/36LETL 16rps 72rps 16rps 90rps 39rps 39rps 2.
  • Page 13: Timer Operation Control

    8. TIMER OPEARTION CONTROL 8-1 WIRELESS REMOTE CONTROLLER The Table 10 shows the available timer setting based on the product model. ( Table 10 : Timer Setting ) ON TIMER / OFF TIMER PROGRAM TIMER SLEEP TIMER AB* G30/ 36LRTE 1.
  • Page 14 3. SLEEP TIMER If the sleep is set, the room temperature is monitored and the operation is stopped automatically. If the operation mode or the set temperature is change after the sleep timer is set, the operation is continued according to the changed setting of the sleep timer from that time ON. In the cooling operation mode When the sleep timer is set, the setting temperature is increased 1°C.
  • Page 15: Wired Remote Controller

    9-2 WIRED REMOTE CONTROLLER The Table 11 shows the available timer setting based on the product model. ( Table11 : Timer Setting ) ON TIMER / OFF TIMER WEEKLY TIMER TEMPERATURE SET BACK TIMER AR* G30/ 36LMLE AU* G30/ 36LRLE 1.
  • Page 16 2-2. DAY OFF setting The DAY OFF setting is only available for days for which weekly settings already exist. If the operating time carries over to the next day (during a next day setting), the effective DAY OFF range will be set as shown below. Normal DAY OFF Operation mode...
  • Page 17: Electronic Expansion Valve Control

    9. ELECTRONIC EXPANSION VALVE CONTROL The most proper opening of the electronic expansion valve is calculated and controlled under the present operating condition based on the Table 12. The compressor frequency, the temperatures detected by the discharge temperature sensor, the indoor heat exchanger sensor, the outdoor heat exchanger sensor, and the outdoor temperature sensor.
  • Page 18: Auto Restart

    13. AUTO RESTART When the power was interrupted by a power failure, etc. during operation, the operation contents at that time are memorized and when power is recovered, operation is automatically started with the memorized operation contents. When the power is interrupted and recovered during timer operation, since the timer operation time is shifted by the time the power was interrupted, an alarm is given by blinking (7 sec ON/2 sec OFF) the indoor unit body timer lamp.
  • Page 19: Compressor Preheating

    16. COMPRESSOR PREHEATING When the outdoor heat exchanger temperature is lower than 0°C and the all operation mode has been stopped for 30 minutes, power is applied to the compressor and the compressor is heated. (By heating the compressor, warm air is quickly discharged when operation is started.) When operation was started and when the outdoor heat exchanger temperature rises to 2°C or greater, preheating is ended.
  • Page 20: Drain Pump Operation

    20. DRAIN PUMP OPERATION During Cooling / Dry mode 1. When the compressor starts, the drain pump starts simultaneously. 2. The drain pump operates continuously for 3 minutes after the compressor is turned off. 3. When the compressor stops by the "Anti- freezing protection", the drain pump is turned off in 1 hour after the compressor stops.
  • Page 21: Defrost Operation Control

    21. DEFROST OPERATION CONTROL 1. CONDITION OF STARTING THE DEFROST OPERATION The defrost operation starts when the outdoor heat exchanger temperature sensor detects the temperature lower than the values shown in Table 17. (Table 17 : Condition of starting Defrost Operation) 1st time defrosting after starting operation Compressor contiguous Below 10 min.
  • Page 22 3. Defrost Flow Chart The defrosting shall proceed by the integrating operation time and outdoor heat exchanger temperature as follows. Heating operation start : Compressor ON (Not defrosted for 10 minutes) In case of Integrating defrost In case of 2nd In case of 1st defrost and later defrost for intermittent operation...
  • Page 23: Off Defrost Operation Control

    22. OFF DEFROST OPERATION CONTROL When operation stops in the [Heating operation] mode, if frost is adhered to the outdoor unit heat exchanger, the defrost operation will proceed automatically. In this time, if indoor unit operation lamp flashes slowly (7 sec ON / 2 sec OFF), the outdoor unit will allow the heat exchanger to defrost, and then stop.
  • Page 24: Various Protections

    23. VARIOUS PROTECTIONS 1. DISCHARGE GAS TEMPERATURE OVERRISE PREVENTION CONTROL The discharge gas thermosensor (discharge thermistor : Outdoor side) will detect discharge gas temperature. When the discharge temperature becomes higher than Temperature , the compressor frequency is decreased 10rps and it continues to decrease the frequency for 10rps every 120 seconds until the temperature becomes lower than Temperature .
  • Page 25: Compressor Stop Control

    4. COOLING PRESSURE OVERRISE PROTECTION When the outdoor unit heat exchange sensor temperature rises to 67°C or greater, the compressor is stopped and trouble display is performed. 5. HIGH TEMPERATURE AND HIGH PRESSURE RELEASE CONTROL ( HEATING MODE ) On heating mode, the compressor frequency is controlled as following based on the detection value of the indoor heat exchanger temperature sensor.
  • Page 27: Trouble Shooting

    R410A Cassette/ Duct/ Ceiling type INVERTER 2 . TROUBLE SHOOTING...
  • Page 28: Error Display

    2-1 ERROR DISPLAY 2-1-1 INDOOR UNIT AND WIRED REMOTE CONTROLLER DISPLAY Please refer the flashing pattern as follows. The OPERATION, TIMER, ECONOMY lamps operate as follows according to the error contents. Indoor Unit Display Wired Remote Trouble Controller shooting Error Contents Operation Timer Economy...
  • Page 29: Wired Remote Controller Display

    2-1-2 WIRED REMOTE CONTROLLER DISPLAY 1. SELF - DIAGNOSIS When " " in Temperature Display is displayed, inspection of the air conditioning system is necessary. Please consult authorized service personnel. Unit number (usually 0) Error code SU MOTU WETH FR SA ex.
  • Page 30: Trouble Shooting With Error Code

    2-2 TROUBLE SHOOTING WITH ERROR CODE Trouble shooting 1 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Serial Communication Error (Serial Reverse Transfer Error) Detective Actuators: Detective details: When the indoor unit cannot receive the serial signal from Outdoor unit Outdoor unit Main PCB more than 2minutes after power ON, or the indoor unit cannot receive Outdoor unit Fan motor...
  • Page 31 Trouble shooting 2 Indicate or Display: INDOOR UNIT Error Method: Refer to error code table. Serial Communication Error (Serial Forward Transfer Error) Detective Actuators: Detective details: When the outdoor unit cannot properly receive the serial signal from Indoor unit Controller PCB indoor unit for 10 seconds or more.
  • Page 32 Trouble shooting 3 Indicate or Display: INDOOR UNIT Error Method: Refer to error code table. Wired Remote Controller Communication Error Detective Actuators: Detective details: Indoor unit Controller PCB When the indoor unit cannot properly receive the signal from Wired Remote Controller (Option) Wired Remote Controller for 1 minute or more.
  • Page 33 Trouble shooting 4 Indicate or Display: INDOOR UNIT Error Method: Refer to error code table. Indoor Unit Model Information Error EEPROM Access Abnormal Detective details: Detective Actuators: When power is on and there is some below case. Indoor unit Controller PCB 1.
  • Page 34 Indicate or Display: Trouble shooting 5 INDOOR UNIT Error Method: Refer to error code table. Manual Auto Switch Error Detective Actuators: Detective details: Indoor Unit Controller PCB When the Manual Auto Switch becomes ON for consecutive 60 or Indicator PCB more seconds.
  • Page 35: Trouble Shooting 6

    Trouble shooting 6 Indicate or Display: INDOOR UNIT Error Method: Refer to error code table. Indoor Room Thermistor Error Detective details: Detective Actuators: Indoor unit Controller PCB Room temperature thermistor is open or short is detected always. Room temperature thermistor Forecast of Cause : 1.
  • Page 36 Trouble shooting 7 Indicate or Display: INDOOR UNIT Error Method: Refer to error code table. Indoor Heat Ex. Thermistor Error Detective Actuators: Detective details: Indoor unit Controller PCB Heat exchanger (MID) thermistor is open or short is detected always. Heat exchanger (MID) Thermistor Forecast of Cause : 1.
  • Page 37 Trouble shooting 8 Indicate or Display: INDOOR UNIT Error Method: Refer to error code table. Indoor unit Fan Motor Error Detective Actuators: Detective details: Indoor unit Controller PCB When the condition that actual frequency of Indoor Fan is below 1/3 of target frequency is continued more than 56 seconds. Indoor unit fan motor Forecast of Cause: 1.
  • Page 38 Indicate or Display: Trouble shooting 9 INDOOR UNIT Error Method: Refer to error code table. Drain Pump Error Detective Actuators: Detective details: Indoor unit Controller PCB When Float switch is ON for more than 3 minutes. Float switch Forecast of Cause : 1. Float switch failure 2.
  • Page 39 Trouble shooting 10 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. A.F Voltage Error Detective Actuators: Detective details: Outdoor unit Main PCB When inverter input DC voltage is higher than 425V or lower than 80V. When a momentary power cut off occurred on low voltage Forecast of Cause : 1.
  • Page 40 Trouble shooting 11 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. IPM Error Detective details: Detective Actuators: When more than normal operating current to IPM in Main PCB flows, Outdoor unit Main PCB the compressor stops. Compressor After the compressor restarts, if the same operation is repeated within 40sec, the compressor stops again.
  • Page 41 Trouble shooting 12 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Discharge Thermistor Error Detective Actuators: Detective details: Outdoor unit Main PCB When Discharge pipe temperature thermistor open or short-circuit Discharge pipe temperature thermistor is detected at power ON or while running the compressor. Forecast of Cause : 1.
  • Page 42 Trouble shooting 13 Indicate or Display: OUTDOOR UNIT Error Method: Compressor Thermistor Error Detective Actuators: Detective details: Outdoor unit Main PCB When Compressor temperature thermistor open or short-circuit Compressor temperature thermistor is detected at power ON or while running the compressor. Forecast of Cause : 1.
  • Page 43 Trouble shooting 14 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Heat Ex. Liquid Outlet Thermistor Error Detective Actuators: Detective details: Outdoor unit Main PCB When Heat exchanger temperature thermistor open or Heat exchanger temperature thermistor short-circuit is detected at power ON or while running the compressor.
  • Page 44 Trouble shooting 15 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Outdoor Thermistor Error Detective Actuators: Detective details: Outdoor unit Main PCB When Outdoor temperature thermistor open or short-circuit Outdoor temperature thermistor is detected at power ON or while running the compressor. Forecast of Cause : 1.
  • Page 45 Trouble shooting 16 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Current Sensor Error Detective details: Detective Actuators: When Input Current Sensor has detected 0A, while Inverter Compressor is Outdoor unit Main PCB operating at higher than 56rps, after 1minute upon starting the Compressor. (Except during the defrost operation) Forecast of Cause : 1.
  • Page 46 Trouble shooting 17 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. High Pressure Switch Error Detective Actuators: Detective details: When pressure switch open is detected in 10 seconds Outdoor unit Main PCB after the power is turned on. High Pressure Switch Forecast of Cause : 1.
  • Page 47 Trouble shooting 18 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Over Current Error Detective details: Detective Actuators: "Protection stop by overcurrent generation after inverter compressor start Outdoor unit Main PCB processing completed'' generated consecutively 10 times. Compressor * The number of generations is reset if the start-up of Transistor PCB (IPM)
  • Page 48 Trouble shooting 19 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Compressor Control Error Detective details: Detective Actuators: While running the compressor, if the detected rotor location is out of Outdoor unit Main PCB phase with actual rotor location more than 90°, Compressor the compressor stops.
  • Page 49 Trouble shooting 20 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Outdoor Unit Fan Motor Error Detective Actuators: Detective details: When outdoor fan rotation speed is less than 100rpm in 20 seconds Outdoor unit Main PCB after fan motor starts, fan motor stops.
  • Page 50 Trouble shooting 21 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. 4-Way Valve Error Detective Actuators: Detective details: When the indoor heat exchanger temperature is compared with Indoor unit Controller PCB the room temperature, and either following condition is detected Heat exchanger temperature thermistor continuously two times, the compressor stops.
  • Page 51 Trouble shooting 22 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Discharge Temp. Error Detective details: Detective Actuators: "Protection stop by "discharge temperature 110degC during compressor Discharge temperature thermistor operation"" generated 2 times within 24 hours. Outdoor unit Main PCB Forecast of Cause : 1.
  • Page 52 Trouble shooting 23 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Compressor Temp. Error Detective details: Detective Actuators: "Protection stop by Compressor temperature thermistor "compressor temperature 108°C during compressor operation"" Outdoor unit Main PCB generated 2 times within 24 hours. Forecast of Cause : 1.
  • Page 53: Trouble Shooting With No Error Code

    2-3 TROUBLE SHOOTING WITH NO ERROR CODE Forecast of Cause: Trouble shooting 24 1. Power Supply failure 2. External cause Indoor Unit - No Power 3. Electrical Components defective Check Point 1 : Check Installation Condition Isn’t the breaker down? Check loose or removed connection cable.
  • Page 54 Forecast of Cause: Trouble shooting 25 1. Power Supply failure 2. External cause Outdoor Unit - No Power 3. Electrical Components defective Check Point 1 : Check Installation Condition Isn’t the breaker down? Check loose or removed connection cable. >>If abnormal condition is found, correct it by referring to Installation Manual or Data &...
  • Page 55 Forecast of Cause: Trouble shooting 26 1. Setting/ Connection failure 2. External cause No Operation (Power is ON) 3. Electrical Component defective Check Point 1 : Check indoor and outdoor installation condition Indoor Unit - Check incorrect wiring between Indoor Unit - Remote Control. Or, check if there is an open cable connection.
  • Page 56 Forecast of Cause: Trouble shooting 27 1. Indoor Unit error 2. Outdoor Unit error No Cooling / No Heating 3. Effect by Surrounding environment 4. Connection Pipe / Connection Wire failure 5. Refrigeration cycle failure Check Point 1 : Check Indoor Unit Does Indoor unit FAN run on HIGH FAN? Is Air Filter dirty? Is Heat Exchanger clogged?
  • Page 57 Forecast of Cause : Trouble shooting 28 1. Abnormal installation (Indoor/ Outdoor) Abnormal Noise 2. Fan failure (Indoor/ Outdoor) 3. Compressor failure (Outdoor) Diagnosis method when Abnormal Noise is occurred Abnormal noise is coming from Indoor Unit. Abnormal noise is coming from Outdoor Unit. (Check and correct followings) (Check and correct followings) Is Main unit installed in stable condition?
  • Page 58: Service Parts Information

    2-4 SERVICE PARTS INFORMATION SERVICE PARTS INFORMATION 1 Compressor Diagnosis method of Compressor ( If Outdoor Unit LED displays Error, refer to Trouble shooting ) Abnormal noise Stops soon after starting up Does not start up Check if vibration noise by Is there open or loose connection Is there open or loose connection loose bolt or contact noise...
  • Page 59 SERVICE PARTS INFORMATION 2 Inverter Compressor Check Point 1 : Check connection Check terminal connection of Compressor Check connection of Transistor PCB(IPM). (Loose or incorrect wiring) (Loose or incorrect wiring) W(T) V(S) (BLACK) (WHITE) Main PCB TM305 TM304 TM303 Main PCB BLACK WHITE Compressor...
  • Page 60 SERVICE PARTS INFORMATION 3 Outdoor unit Electronic Expansion Valve ( EEV ) Check Point 1 : Check Connections Check connection of connector ( Loose connector or open cable ) EXPANSION VALVE COIL BROWN BLUE CN700 ORANGE YELLOW WHITE Check Point 3 : Check Noise at start up Check Point 2 : Check Coil of EEV Remove connector, check each winding Turn on Power and check operation noise.
  • Page 61 SERVICE PARTS INFORMATION 4 Indoor unit fan motor Check Point 1 : Check rotation of Fan Rotate the fan by hand when operation is off. (Check if fan is caught, dropped off or locked motor) >>If Fan or Bearing is abnormal, replace it. Check Point 2 : Check resistance of Indoor Fan Motor Refer to below.
  • Page 63: Appending Data

    R410A Cassette/ Duct/ Ceiling type INVERTER 3 . APPENDING DATA...
  • Page 64: Function Setting

    3-1. FUNCTION SETTING 3-1-1 INDOOR UNIT Follow the instructions in the Local Setup Procedure, which is supplied with the remote control, in accordance with the installed condition. After the power is turned on, perform the Function Setting on the remote control. The settings may be selected between the following two: Function Number or Setting Value.
  • Page 65 1-4. Outlet directions (For AU type) Select the setting values in the table below for using a 3-way outlet. Factory setting) Setting Description Function Number Setting Value 4-way 3-way 1-5. Vertical direction adjusting scope (For AU type) To prevent from draft, we recommend using "upward mode". Factory setting) Setting Description Function Number...
  • Page 66 1-9. Setting the Indoor room temperature sensor switching function (Only for Wired remote controller) The following settings are needed when use the control by Wired remote controller temperature sensor. Factory setting) Setting Description Function Number Setting Value If setting value is “00”, room temperature is controlled by the indoor unit temperature sensor.
  • Page 67: Procedures To Change The Function Setting

    3-1-2 PROCEDURES TO CHANGE THE FUNCTION SETTING The function settings of the control of the indoor unit can be changed by this procedure according to the installation conditions. Incorrect settings can cause the indoor unit malfunction. After the power is turned on, perform the "FUNCTION SETTING" according to the installation conditions using the remote controller.
  • Page 68 FUNCTION SETTING METHOD (for Wireless remote controller) Entering the Function Setting Mode While pressing the FAN button and SET TEMP.( ) button simultaneously, press the RESET button to enter the function setting mode. STEP 1. Setting the Remote controller Signal Code Use the following steps to select the signal code of the remote controller.
  • Page 69 REMOTE CONTROLLER SIGNAL CODE SETTING Use the following steps to select the signal code of the remote controller. (Note that the air conditioner cannot receive a signal code if the air conditioner has not been set for the signal code.) (1) Press the START/STOP button until only the clock is displayed on the remote controller display.
  • Page 70: Indoor Unit

    3-2. THEMISTOR RESISTANCE VALUES 3-2-1 INDOOR UNIT Indoor heat exchanger thermistor Room temperature thermistor Temp (°C) Resistance(k ) Voltage(V) Temp (°C) Resistance(k ) Voltage(V) 58.2 -10.0 0.73 -30.0 1131.9 0.21 44.0 0.93 -5.0 -25.0 804.5 0.29 33.6 1.15 -20.0 579.6 0.40 25.9 1.39...
  • Page 71 1116,Suenaga,Takatsu-ku,Kawasaki 213-8502,Japan Apr. 2013 Printed in Japan...

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