This document is a service manual for a Fujitsu Split Type Air Conditioner, specifically a Cassette Type (50 Hz) model. The manual covers both indoor and outdoor units, with model numbers AUYA36LATU/AOYA36LATL and AUYA45LATU/AOYA45LATL, which use R410A refrigerant.
Function Description
The Fujitsu Split Type Air Conditioner is designed for cooling and heating applications, providing climate control for indoor spaces. As a split type system, it consists of separate indoor and outdoor units connected by refrigerant piping. The cassette type indoor unit is typically installed within the ceiling, offering a discreet and efficient way to distribute conditioned air. The system utilizes an inverter-driven compressor, which allows for variable speed operation, leading to improved energy efficiency and more precise temperature control compared to conventional fixed-speed systems.
Important Technical Specifications
The manual provides detailed electrical data, compressor and refrigerant specifications, fan motor data, and noise levels for both AUYA36LATU/AOYA36LATL and AUYA45LATU/AOYA45LATL models.
Electrical Data:
- Power Source: Both models operate on 230 V, 50 Hz.
- Cooling Capacity:
- AUYA36LATU: 10.0 kW
- AUYA45LATU: 12.5 kW
- Heating Capacity:
- AUYA36LATU: 11.2 kW
- AUYA45LATU: 14.0 kW
- Running Current (Cooling):
- AUYA36LATU: 13.6 A
- AUYA45LATU: 17.0 A
- Running Current (Heating):
- AUYA36LATU: 13.2 A
- AUYA45LATU: 16.5 A
- Input Watts (Cooling):
- AUYA36LATU: 3.11 kW
- AUYA45LATU: 3.89 kW
- Input Watts (Heating):
- AUYA36LATU: 3.02 kW
- AUYA45LATU: 3.77 kW
- E.E.R. (Cooling): Both models have an E.E.R. of 3.21 kW/kW.
- E.E.R. (Heating): Both models have an E.E.R. of 3.71 kW/kW.
- Starting Current: 15 A for both models.
- Moisture Removal:
- AUYA36LATU: 3.5 L/hr
- AUYA45LATU: 4.5 L/hr
- Air Circulation (Indoor):
- AUYA36LATU: 1,650 m³/hr
- AUYA45LATU: 1,750 m³/hr
- Air Circulation (Outdoor): 6,600 m³/hr for both models.
- Maximum Current:
- AUYA36LATU: 19.0 A
- AUYA45LATU: 20.0 A
Compressor and Refrigerant:
- Compressor Type: Hermetic type, Inverter, 4 poles, 3 phase, DC motor, Twin Rotary.
- Discrimination: DA420A3F-21ZA.
- Weight (with oil): 23.7 kg.
- Refrigerant Type: R410A.
- Standard Refrigerant: 3,350 g.
- Max Pipe Length: 50 m.
- Max Pipe Height: 30 m.
- Full Charge (Refrigerant): Varies with pipe length (e.g., 3,350 g for 20 m, up to 4,850 g for 50 m).
- Additional Charge: 50 g/m.
Fan Motor (Indoor Unit - MFF-45RV):
- High speed: 680 r.p.m. (AUYA36LATU), 720 r.p.m. (AUYA45LATU)
- Med speed: 570 r.p.m. (AUYA36LATU), 590 r.p.m. (AUYA45LATU)
- Low speed: 480 r.p.m. (AUYA36LATU), 500 r.p.m. (AUYA45LATU)
- Quiet (cool/heat): 400/420 r.p.m. (AUYA36LATU), 440/440 r.p.m. (AUYA45LATU)
Fan Motor (Outdoor Unit - MFE-60PO):
- Upper fan: 850 r.p.m. for both models.
- Lower fan: 750 r.p.m. for both models.
Noise Level (Indoor Unit):
- High speed: 50 dB (AUYA36LATU), 52 dB (AUYA45LATU)
- Med speed: 46 dB (AUYA36LATU), 47 dB (AUYA45LATU)
- Low speed: 41 dB (AUYA36LATU), 42 dB (AUYA45LATU)
- Quiet (cool/heat): 36 dB / 37 dB (AUYA36LATU), 39 dB / 39 dB (AUYA45LATU)
Noise Level (Outdoor Unit):
- Cooling: 54 dB (AUYA36LATU), 55 dB (AUYA45LATU)
- Heating: 55 dB (AUYA36LATU), 56 dB (AUYA45LATU)
Dimensions (H x W x D):
- Indoor Unit: 296 x 830 x 830 mm
- Outdoor Unit: 1,290 x 900 x 330 mm
Weight (Gross / Net):
- Indoor Unit: 54 kg / 39 kg
- Outdoor Unit: 107 kg / 98 kg
Usage Features
The manual details various aspects related to the installation and operation of the air conditioner, including:
- Dimensions: Comprehensive diagrams for both indoor and outdoor units, including detailed measurements and component locations like terminal boxes and hanging bolt positions.
- Setting Options: Illustrations for "Standard setting" and "Slender setting" of the indoor unit, showing drain pipe, gas pipe, and liquid pipe connections relative to the ceiling.
- Refrigerant System Diagram: A detailed schematic illustrating the flow of refrigerant, including components such as the condenser, evaporator, compressor, 4-way valve, expansion valve, accumulators, strainers, and pressure check valve. It also indicates refrigerant direction for cooling and heating modes.
- Circuit Diagrams: Electrical schematics for both indoor and outdoor units, showing the connections of various components like PCBs, thermistors, fan motors, and the compressor.
- Error Contents: A critical section for troubleshooting, outlining error codes and their corresponding indications on both the wired remote control LCD and the outdoor unit's LED.
Remote Control Unit Error Display:
When an error occurs, "EE" appears on the set room temperature display, along with a specific unit number and error code. Examples include:
- 01 13 / 26 27: Indoor signal error
- 00: Wired remote controller abnormal
- 02: Indoor room temperature sensor error
- 04: Indoor heat exchanger temperature sensor (middle) error
- 09: Float switch operated
- 0C: Outdoor discharge pipe temperature sensor error
- 17: IPM protection
- 18: CT error
- 1A: Compressor location error
- 1F: Connected indoor unit abnormal
- 12: Indoor fan abnormal
- 24: Excessive high pressure protection on cooling
- 2C: 4-way valve abnormal
- 16: Pressure switch abnormal
- 19: Active filter abnormal
- 25: PFC circuit error
Outdoor Unit LED Error Display:
The LED on the outdoor unit's circuit board flashes to indicate specific errors:
- 1 flash: Communication error (Indoor unit - Outdoor unit)
- 2 flash: Discharge pipe temperature sensor
- 3 flash: Outdoor heat exchanger temperature (outlet) sensor
- 4 flash: Outdoor temperature sensor
- 5 flash: Outdoor heat exchanger temperature (mid) sensor
- 6 flash: Discharge pipe temperature abnormal
- 7 flash: Compressor temperature sensor
- 8 flash: Heat sink temperature sensor
- 9 flash: Pressure switch abnormal
- 10 flash: Compressor temperature abnormal
- 12 flash: IPM error
- 13 flash: Compressor rotor position cannot detect
- 14 flash: Compressor cannot operate
- 15 flash: Outdoor fan abnormal (upper fan)
- 16 flash: Outdoor fan abnormal (lower fan)
- 5 sec. on/1 sec. off repeat: Protect operation
- 1 sec. on/1 sec. off repeat: Pump down operation
- off: No error
Maintenance Features
The manual provides instructions for "PUMP DOWN (Refrigerant collecting operation)," which is a crucial maintenance procedure for moving the indoor or outdoor unit.
PUMP DOWN Procedure:
1. When the product is stopped:
* Press the PUMP DOWN switch on the outdoor unit. The LED on the outdoor unit circuit board will flash (1 sec. on / 1 sec. off repeated).
* The pump down operation (cooling operation) begins immediately. After operation starts, close the three-way valve (liquid).
* After 2-3 minutes, operation stops. Close the three-way valve (gas) within one minute after operations stop.
* The LED will go out three minutes after it stops. Disconnect the power supply after confirming the LED has gone out.
2. When the product is operating:
* Press the PUMP DOWN switch on the outdoor unit. The LED on the outdoor unit circuit board will flash (1 sec. on / 1 sec. off repeated), and operation stops. At this point, recovery has not been completed, so do not close the three-way valves (liquid and gas).
* The pump down operation (cooling operation) begins after three minutes. Close the three-way valve (liquid) after operation starts.
* After 2-3 minutes, operation stops. Close the three-way valve (gas) within one minute after operations stop.
* The LED will go out three minutes after it stops. Disconnect the power supply after confirming the LED has gone out.
Important Notes for Pump Down:
- If the pump down operation is repeated, temporarily disconnect the power supply after opening the closed valves (both liquid and gas). Reconnect the power supply after 2-3 minutes and perform the pump down operation.
- When the start of the operation after pump down operation has been completed, temporarily disconnect the power supply after opening the closed valves (both liquid and gas). Reconnect the power supply after 2-3 minutes and be sure to perform a test operation for cooling.
Safety Warning:
- The Choke coil generates high voltages and should never be touched.
Tightening Torque Specifications:
The manual specifies tightening torques for various pipe connections and caps:
- 6.35 mm (1/4 in.): 20 to 25 N-m (200 to 250 kgf-cm)
- 9.52 mm (3/8 in.): 20 to 25 N-m (200 to 250 kgf-cm)
- 12.70 mm (1/2 in.): 25 to 30 N-m (250 to 300 kgf-cm)
- 15.88 mm (5/8 in.): 30 to 35 N-m (300 to 350 kgf-cm)
- 19.05 mm (3/4 in.): 35 to 40 N-m (350 to 400 kgf-cm)
- Charging port cap: 10 to 12 N-m (100 to 120 kgf-cm)
- Spindle (Hexagon wrench): 6 to 7 N-m (60 to 70 kgf-cm)
Parts Lists:
Detailed exploded views and parts lists are provided for both indoor and outdoor units, including:
- Indoor Unit: Intake grille sub-assembly, panel base, evaporator, drain pan, and fan motor.
- Outdoor Unit: Top panel, front panel, fan guard, service panel, right panel, valve cover, propeller fan, motor DC brushless, condenser, sepa wall, cap foot, base assembly, coil choke, 3-way valve, compressor, accumulator, solenoid, pressure switch, 4-way valve, check valve, expansion valve coil, strainer, and various covers.
Each part is listed with a reference number, description, and part number, facilitating identification and ordering of replacement components.
Accessories:
A list of accessories for both indoor and outdoor units is provided, including:
- Indoor Unit: Coupler heat insulation, tapping screws (for remote controller), special nuts A and B (for indoor unit installation), template (for ceiling hole cutting), binder (for fixing remote controller cord), blower cover insulation, hook wire (for intake grille), rubber sheet (for wiring cover), remote control, and remote controller cord.
- Outdoor Unit: Drain pipe, drain cap, and installation seal (for filling gaps at connection cords). Each accessory includes its name, shape, quantity, application, and part number.
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