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Fujitsu Halcyon HFI AUU18RGLX Troubleshooting Manual
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Fujitsu Halcyon HFI AUU18RGLX Troubleshooting Manual

410a mini-split
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HOW TO REACH US:
Website
www.fujitsugeneral.com
Zendesk Help Center
https://fujitsugeneral.zendesk.com/hc/en-us
Fujitsu Online Learning Academy
https://training.fujitsugeneral.com/
FREE DOWNLOADS!
Mobile Technician App
Part # 6-26-FG2020 Rev. 5/2019
Infinite Comfort Pro App
410A MINI-SPLIT
TROUBLESHOOTING
GUIDE
FUJITSU GENERAL AMERICA, INC.
(866) 952-8324
Service Dept.: (973) 575-0381 servicehvac@fujitsugeneral.com

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Summary of Contents for Fujitsu Halcyon HFI AUU18RGLX

  • Page 1 HOW TO REACH US: Website www.fujitsugeneral.com Zendesk Help Center https://fujitsugeneral.zendesk.com/hc/en-us 410A MINI-SPLIT TROUBLESHOOTING Fujitsu Online Learning Academy https://training.fujitsugeneral.com/ GUIDE FREE DOWNLOADS! Mobile Technician App Infinite Comfort Pro App FUJITSU GENERAL AMERICA, INC. (866) 952-8324 Service Dept.: (973) 575-0381 servicehvac@fujitsugeneral.com Part # 6-26-FG2020 Rev. 5/2019...
  • Page 2 AUU18RGLX, AUU24RGLX, AUU30RGLX, AUU36RGLX, AUU42RGLX, AUU48RGLX , ARU12RGLX, ARU18RGLX, ARU24RGLX, ARU30RGLX, RGLX Models: ARU36RGLX, ARU42RGLX, ARU48RGLX Error Indication Wired Remote Error Diagnosis Method Controller Operation Timer Economy 1 Time 1 Time Continuous Serial Communication Error – At Start Up, evaporator and condenser are not communicating. communication -Check wiring from panel to condenser, condenser to evaporator.
  • Page 3 2 Times 9 Times Continuous Connection unit Wire Installation number error -Wrong number of connecting indoor units. (indoor unit Check Indoor Unit Controller PCB wired remote -Check if controller PCB is damaged. control error) -Check controller PCB and check the error after setting remote control address. 3 Times 2 Times Continuous...
  • Page 4 4 Times 2 Times Continuous Indoor heat ex. Indoor Heat Ex. (Pipe) Thermistor Error – Evaporator pipe thermistor detected an abnormal temperature. (Pipe) thermistor -Check thermistor for open for open or short. Check thermistor resistance value. (Ref. Thermistor Resistance error Chart) -Controller PCB defective.
  • Page 5 6 Times 4 Times Continuous Active filter / Active Filter Error– When inverter input DC voltage is higher than 425v or lower than 80V. When a momentary PFC Circuit error power cut off occurred on low voltage. -Check external cause at the indoor and outdoor (voltage drop or noise). -Check connection of connector, loose, or erroneous connection.
  • Page 6 8 Times 4 Times Continuous Current sensor Current Sensor Error – When input current sensor has detected 0A, while the inverter compressor is operating at error higher than 56rps, after 1 minute upon starting the compressor. (Except during defrost operation) -Check if terminal connection is loose.
  • Page 7 9 Times 9 Times Continuous 4-way valve When the indoor heat-exchanger temperature is compared with the room temperature, and either following error condition is detected continuously two times, the compressor stops. Cooling or Dry operation [Indoor heat-exchanger temp.] – [Room temp.] > 18°F (10°C) Heating operation [Indoor heat-exchanger] –...
  • Page 8 1 Time 8 Times Continuous External External Communication Error – After receiving a signal from the external I/O PCB, the same signal has not been communication received for 15 seconds. error -Check any loose or removed connections between the controller PCB to the external I/O PCB, open cable or mis- wiring.
  • Page 9 4 Times 2 Times Continuous Indoor heat Indoor Heat Ex. (Pipe) Thermistor Error – Evaporator pipe thermistor detected an abnormal temperature. ex. (Pipe) -Check thermistor for open for open or short. Check thermistor resistance value -Controller PCB defective. (Ref. Thermistor Resistance Chart) thermistor error 5 Times 1 Time...
  • Page 10 7 Times 1 Time Continuous Discharge Discharge Thermistor Error – When discharge pipe temperature thermistor open or short-circuit is detected at thermistor error power on or while running the compressor. -Check connection of connector, loose, erroneous connection. -Check thermistor for open or short. Check thermistor resistance value (Ref. Thermistor Resistance Chart) -Check voltage of Main PCB.
  • Page 11 9 Times 4 Times Continuous Over current Over Current Error – Protection stop by overcurrent generation after inverter compressor start processing completed error generated consecutively 10 times. The number of generations is reset if the start-up of the compressor succeeds. -Clogged heat exchanger.
  • Page 12 10 Times 1 Time Continuous Discharge Discharge Temperature Error - Protection stop by discharge temperature ≥230°F (110°C) during compressor temperature operation generated 2 times within 24 hours. error -Check if 3-way valve is open. -Check EEV, strainer. (Ref. Service Tip #001-Discharge Temperature Thermistor Error) -Check outdoor unit fan, heat exchanger.
  • Page 13 Check-Run Unfinished – When the operation command is inputted by the remote controller without check operation completion. Check run -Check indoor unit number connection. 1 Time 5 Times Continuous unfinished -Power down all indoors units with remote controller, reset disconnect and branch box power for 5 minutes, reinitiate check-run operation.
  • Page 14 Indoor Unit Fan Motor Error – When the condition that actual frequency of indoor fan is below 1/3 of target frequency is continued more than 56 seconds. -Check rotation of fan. Indoor unit fan 5 Times 1 Time Continuous -Check ambient temperature around motor. motor error -Check indoor unit fan motor resistance values.
  • Page 15 IPM Error – Abnormal current value at the IPM is detected. Heat radiation is blocked (inlet/outlet). -Check connections of outdoor unit electrical components. 6 Times 5 Times Continuous IPM error -Check outdoor fan, heat exchanger. (Ref. Service Tip #008-Fan Motor Check) -Check compressor resistance values.
  • Page 16 3-Way Valve Thermistor Error – When 2-way valve temperature thermistor is open or short-circuited while power is on or while running the compressor. 3-Way valve 7 Times 6 Times Continuous -Check for erroneous connection or removed connector. thermistor error -Check resistance of thermistor. (Ref. Thermistor Resistance Chart) -Check voltage to thermistor.
  • Page 17 Compressor Motor Control Error – If the detected rotor location is out of phase with actual rotor location more than 90 degrees, the compressor stops. After the compressor restarts, if the same operation is repeated within 40 seconds, the compressor stops again. Compressor 9 Times 5 Times...
  • Page 18 Low Pressure Error – Protection stop by suction pressure ≤7.35 PSI continued for 5 minutes, repeats 5 times within 2 hours. -Check if 3-way valve (gas side) is open. Low pressure 10 Times 5 Times Continuous -Clogged strainer. error -Check ohm resistance value of EEV coil. (Ref. Service Tip #001 Discharge Temperature Thermistor Error) -Check suction pressure sensor.
  • Page 19 High pressure switch 1 error 9 flashes High pressure switch 2 error 10 flashes Indoor unit capacity error 11 flashes Over current error 12 flashes Compressor control error 13 flashes IPM error 14 flashes Outdoor unit fan motor error 15 flashes Heat Ex.
  • Page 20 Valve sensor error     7 6 Current sensor 1 error (stoppage permanently)     8 4 Discharge pressure sensor error 8 6     Trip detection 9 4     Compressor motor control error 9 5 ...

  • Page 21: Normal Status

    Halcyon HFI Flex Branch Boxes: UTY-PU03A, UTP-PU03B When an error occurs, an error description displays in the LED (No. 401 – 405).   (n) Flashing (number of flashing)  Unlit Normal Status Green Comment LED 401 LED 402 LED 403 LED 404 LED 405 ...
  • Page 22 Halcyon HFI Flex Outdoor Unit AOU48RLXFZ, AOU48RLXFZ1 • When error occurs, “Err” and “Number of error occurred” are alternately displayed in 7 seg. Display. • The latest error code can be confirmed by pressing the ENTER button. • When error codes are displayed, all the error codes can be confirmed by pressing the SELECT button. SELECT Press the “SELECT”...
  • Page 23 Universal Mount / Ceiling Suspended: ABU18RULX, ABU24RULX, ABU36RSLX Operation Timer Swing Error Contents Continuous blink Continuous blink Indoor EEPROM abnormal Continuous blink Continuous blink Continuous blink Outdoor EEPROM abnormal 2 flashes Continuous blink Indoor room temperature sensor open 2 flashes Continuous blink Continuous blink Indoor room temperature sensor short circuited...
  • Page 24 Indoor Ceiling Cassettes AUU18RCLX, AUU24RCLX, AUU36RCLX, AUU42RCLX Outdoor unit doesn’t accept the signal from the indoor unit Error code Error Contents Excessive outdoor pressure (permanent stop) Indoor unit doesn’t accept signal from outdoor unit Compressor temperature sensor Room temperature sensor open Pressure switch error Room temperature sensor short circuited IPM error...

  • Page 25: Wall Mounted

    Wall Mounted 9CQ, 9RQ, 9R2, 9RLQ, *9RL, *9RLS, 12CQ, 12RQ, 12R2, 12RLQ, *12RL, *12RLS, 15RLQ, 18CL, 18RL, 18RLQ, 18RLXQ, *18RLXS, 24CL, 24CL1, 24RLQ, *24RLXS, *30RLX, 30CLX, 30CLX1, 30RLXQ, 36CLX, 36CLX1 *Operation & Timer LEDs colors are reversed. Error Indication Error Diagnosis Method Operation Timer...
  • Page 26 Apparent model information error from EPROM (miss match). 3 continuous failure of lead test of EPROM at power on, voltage drop or noise, etc. 5 Times 7 Times Model match error connected indoor -Controller PCB defective. unit error Evaporator fan motor error – The indoor fan speed is 0 RPM after 56 seconds from starting operation. -Check if fan motor connector is loose/defective contact.

  • Page 27: Error Contents

    Multi-Zones ASU9RMLQ, ASU12RMLQ, ASU18RMLQ, ARU9RML*, ARU12RML*, ARU18RML*, AUU9RML, AUU12RML, AUU18RML *For these models, refer to the wired remote controller Indoor Error Display Error Contents Operation Timer Air Clean Coil Dry Wired Remote Code No. Serial reverse transfer error at Start Up 2 flashes Serial reverse transfer error during operation 3 flashes...
  • Page 28 Multi-Zone Outdoor Units AOU24RML, AOU24RML1, AOU36RML, AOU36RML1 Error Contents 1 flash 1 flash Outdoor communication signal error (forward transfer) 1 flash 1 flash Outdoor discharge pipe thermistor error 2 flashes Heat Ex. thermistor error 3 flashes Outdoor temperature error 4 flashes 2-way valve thermistor error (for indoor unit A) 5 flashes 2-way valve thermistor error (for indoor unit B)
  • Page 29 System Pre-charge Amount Pre-charge Length Max Length Additional Charge Minimum Length Locked Rotor Amps 1 lb. 10 oz. 25 ft. 49 ft. .21 oz./ft. 9 ft. 1 lb. 9 oz. 25 ft. 49 ft. .2 oz./ft. 9 ft. 1 lb. 10 oz. 25 ft.
  • Page 30 18RL 2 lbs. 9 oz. 49 ft. 66 ft. .2 oz./ft. 9 ft. 18RLB 3 lbs. 1 oz. 49 ft. 66 ft. .22 oz./ft. 10 ft. 18RLQ 2 lbs. 9 oz. 49 ft. 66 ft. .2 oz./ft. 9 ft. 18RLX 4 lbs.
  • Page 31 30RLXEH 6 lbs. 12 oz. 65 ft. 246 ft. .43 oz./ft. 16 ft. 30RGLXC 4 lbs. 10.1 oz. 65 ft. 164 ft. .43 oz./ft. 16 ft. 30RGLXD 4 lbs. 10.1 oz. 65 ft. 164 ft. .43 oz./ft. 16 ft. 36CLX / 36CLX1 4 lbs.

  • Page 32: Thermistor Resistance Chart

    Thermistor Resistance Chart MODELS: ALL R410a INDOOR UNITS MODELS: ALL R410a OUTDOOR UNITS Room Temperature Room Temperature Indoor Pipe Indoor Pipe Therm- Discharge Therm- Compressor Outdoor Pipe Outdoor Tempera- Heat Sink Therm- 2/3 Way Valve Thermistor Thermistor w/ Thermistor istor w/ board istor Thermistor Thermistor...

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Halcyon hfi auu24rglxHalcyon hfi auu30rglxHalcyon hfi auu36rglxHalcyon hfi auu42rglxHalcyon hfi auu48rglxHalcyon hfi aru12rglx ... Show all
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