Need help?Do you have a question about the Kentatsu KRFN220CFAN3 and is the answer not in the manual?
This document provides a service manual for Kentatsu Rooftop air conditioning units, specifically models KRFN220CFAN3, KRFN260CFAN3, KRFN300CFAN3, KRFN350CFAN3, KRFN440CFAN3, KRFN530CFAN3, KRFN600CFAN3, KRFN700CFAN3, KRFN880CFAN3, and KRFN1050CFAN3. The manual covers general information, performance data, and installation guidelines for these units.
Kentatsu Rooftop units are designed as package air conditioners suitable for both rooftop and ground-level installations. They are primarily for cooling-only applications, as indicated by the "C" in their model names (e.g., KRFN220CFAN3). The units feature a compact design with flanges for air inlet and outlet, offering flexibility in installation. They are built for durability with pre-painted exterior cabinet panels that pass 1000-hour salt spray tests and weather-resistant construction. Special anti-corrosion treatment can be customized for seaside or acidic environments. The units incorporate reliable scroll compressors for quiet operation and high reliability, and adjustable pulleys allow for changes in air volume. Multi-protection designs ensure normal and reliable operation, including system current protection, high/low-pressure switch protection, and temperature sensor on/off protection. A three-phase protector can also be customized.
Ease of installation is a key feature, with removable access doors on the electric box and external pressure gauge ports for convenient system checks. The units include a system self-diagnostic function, displaying normal checking codes or error codes via an LED on the main PCB board. A wired controller is standard, and centralized control can be achieved with an optional centralized controller (KNI-02).
The Kentatsu Rooftop units come in a range of nominal ton capacities from 6.25 to 30 tons. All models operate on a 380-415V, 3-phase, 50Hz power supply.
Key specifications across the model range include:
Electrical Data: The manual provides detailed electrical data including MCA (Min. Current Amps), TOCA (Total Over-current Amps), MFA (Max. Fuse Amps), STC (Starting Current), RNC (Running Current), and IPT (Input Power) for compressors, evaporator fans, and condenser fans. Wire and fuse sizes are specified according to UL1015 standards (e.g., 3x6mm² + 2x3mm² for KRFN220CFAN3). Voltage imbalance between phases should be less than 2%.
The units are designed for cooling-only operation. The operation limits for cooling mode are an outdoor temperature range of 10°C to 52°C and an indoor temperature range of 17°C to 31°C. Room relative humidity should be less than 80% to prevent condensation.
Safety Controls: The units incorporate several safety controls:
Error and Protection Codes: The manual lists various error codes (E0-EE) for issues like compressor phase sequence, temperature sensor errors (condenser pipe, evaporator pipe, indoor room, ambient), over-current protection, wired controller communication errors, and EEPROM errors. Protection codes (P0-P3, Pc, Pd, PA) cover over-current protection for compressors and fans, high/low pressure, high discharge temperature, and anti-freezing protection. If a protection is triggered three times within one hour for 2-stage products, the unit will power off for recovery.
Regular maintenance is crucial for safe and efficient operation. Users can perform some maintenance tasks, including:
Periodic Maintenance (at least once a year): A comprehensive check of the entire system is recommended annually, including:
Safety during Maintenance:
General| Brand | Kentatsu |
|---|---|
| Model | KRFN220CFAN3 |
| Category | Air Conditioner |
| Language | English |
To Next Page
