Fujitsu ASTG34JFCC - User Manual

This document is a service manual for Fujitsu split-type room air conditioners, specifically models ASTG34JFCC and ASTG34LFCC (indoor units) and AOTG34JFTC and AOTG34LFTC (outdoor units), which utilize R410A refrigerant. It provides comprehensive information for installation, maintenance, and troubleshooting.

Function Description:

The Fujitsu split-type room air conditioner is designed for both cooling and heating, providing climate control for indoor spaces. It operates as a split system, with an indoor unit responsible for air delivery and an outdoor unit housing the compressor and main heat exchange components. The system incorporates DC inverter motor technology for efficient operation and precise temperature control. The manual details the electrical data, noise levels, compressor and refrigerant specifications, dimensions, and fan motor characteristics for both indoor and outdoor units. It also includes detailed circuit diagrams for the indoor and outdoor PCBs, as well as an indicator PCB, to aid in understanding the electrical and control logic. Error detection codes and troubleshooting procedures are provided to assist service personnel in diagnosing and resolving system malfunctions. Furthermore, the manual outlines a "Demand Response" feature, allowing the air conditioner to adjust its operation based on signals from an electricity supplier to manage energy consumption during peak demand periods. A pump-down procedure is also described for safely recovering refrigerant during servicing.

Important Technical Specifications:

Models Covered:
- Indoor Units: ASTG34JFCC, ASTG34LFCC
- Outdoor Units: AOTG34JFTC, AOTG34LFTC
Refrigerant: R410A
Electrical Data:
- Power Source: 240 V, 50 Hz
- Cooling Capacity: 9.20 kW
- Heating Capacity: 10.00 kW (for heat pump models)
- Running Current (Cool): 11.8 A
- Running Current (Heat): 12.8 A
- Input Watts (Cool): 2.80 kW
- Input Watts (Heat): 3.03 kW
- E.E.R. (Cool): 3.29 kW/kW
- COP (Heat, H1): 3.30 kW/kW
- COP (Heat, H2): 2.87 kW/kW
- Moisture Removal: 3.5 L/hr
- Air Circulation (High): 1,250 m³/hr (Cool), 1,220 m³/hr (Heat)
- Maximum Current: 18.5 A (Cool), 19.0 A (Heat)
Noise Level:
- Indoor Unit: High 52 dB, Medium 42 dB, Low 37 dB, Quiet 34 dB
- Outdoor Unit: 53 dB
Compressor and Refrigerant:
- Compressor Type: Hermetic type, 4 pole, DC inverter motor, Rotary
- Weight with Oil: 15.4 kg
- Precharged Refrigerant: 2,750 g
- Refrigerant Type: R410A
- Full Charge (50 m pipe length): 3,950 g
- Additional Refrigerant: 40 g/m
- Maximum Piping Height: 30 m
- Refrigerant Pipe Diameter: Liquid 1/4" (6.35 mm), Gas 5/8" (15.88 mm)
Dimensions (HxWxD):
- Indoor Unit: 320 x 998 x 238 mm
- Outdoor Unit: 1,290 x 900 x 330 mm
Weight (Shipping / Net):
- Indoor Unit: 18 kg / 14 kg
- Outdoor Unit: 93 kg / 86 kg
Fan Motor (Indoor Unit): MFD-71TXAN, 240 V
- Cool (High: 1,650 r.p.m., Medium: 1,220 r.p.m., Low: 1,020 r.p.m., Quiet: 930 r.p.m.)
- Heat (High: 1,620 r.p.m., Medium: 1,220 r.p.m., Low: 1,020 r.p.m., Quiet: 900 r.p.m.)
Fan Motor (Outdoor Unit): MFE-60TVT
- Cool (Upper: 780 r.p.m., Lower: 750 r.p.m.)
- Heat (Upper: 720 r.p.m., Lower: 700 r.p.m.)

Usage Features:

Remote Control: The indoor unit can be controlled via a wireless remote control (AR-RAJ8E for ASTG34JFCC, AR-RAH2E for ASTG34LFCC) or a wired remote control (optional).
Demand Response (DR) Compatibility: The system is designed to work with Demand Response programs, allowing the air conditioner to adjust its operation based on signals from an electricity supplier. This feature helps manage energy consumption during peak demand. The indoor unit's OPERATION indicator (green) blinks to indicate entry into DR mode. Three DR modes are described:
- DR mode 1: Compressor off.
- DR mode 2: Cooling/heating continues, but electrical energy consumed is not more than 50% of rated capacity over a half-hour period.
- DR mode 3: Cooling/heating continues, but electrical energy consumed is not more than 75% of rated capacity over a half-hour period.
Test Run Functionality: A detailed test run method is provided for post-installation checks, including verifying secure installation, gas leakage, insulation, drain hose function, cable connections, and refrigerant charge. The test run can be initiated via the ENTER button on the outdoor unit's indicator PCB, allowing for cooling and heating test modes.

Maintenance Features:

Error Detection: The manual provides comprehensive error detection information. For wireless remote control, error codes are indicated by blinking patterns of the OPERATION, TIMER, and ECONOMY lamps on the indoor unit. For wired remote control, error codes appear on the remote control display. A table lists various error codes (e.g., serial communication error, sensor errors, fan motor errors, compressor errors, pressure errors) with their corresponding blinking patterns and descriptions.
Pump Down Procedure: A step-by-step procedure for safely performing a pump-down operation is outlined. This involves checking 3-way valves, powering on the unit, pressing the PUMP DOWN button, and closing the liquid and gas pipe 3-way valves at specific times indicated by LED display changes on the outdoor unit's indicator PCB. This procedure is crucial for refrigerant recovery before disconnecting pipes.
Parts List: Detailed exploded views and parts lists are provided for both indoor and outdoor units, including main PCBs, indicator PCBs, fan motors, heat exchangers, casing components, and accessories. This facilitates identification and ordering of replacement parts.
Circuit Diagrams: Comprehensive circuit diagrams for the indoor and outdoor PCBs, as well as the refrigerant system, are included to assist technicians in diagnosing electrical faults and understanding system operation.
Filter Maintenance: The manual implicitly suggests filter maintenance through the inclusion of "Air Filter" and "Air Clean Filter Assy" in the parts list, and the "filter sign" not being performed during DR mode, implying regular filter checks are expected.