The American Standard HVAC Mitsubishi Electric NAXSKS36A112A Series is a high-efficiency ductless mini-split heat pump system designed for residential and light commercial applications. This system features inverter-driven compressor technology, multi-zone capability, quiet operation, and advanced climate control with Wi-Fi compatibility. Below are key sections covering safety, features, installation, setup, operation, maintenance, and troubleshooting.
Key components: Outdoor condensing unit, Indoor wall-mounted evaporator(s), Remote control(s), Installation accessories, Communication wiring.
| Feature | Description |
|---|---|
| Inverter Technology | Variable-speed compressor for precise temperature control and energy savings |
| Multi-Zone Capability | Connect up to 4 indoor units to a single outdoor unit (model dependent) |
| Quiet Operation | Low noise levels for both indoor and outdoor units |
| Wi-Fi Ready | Optional interface for remote control via smartphone app |
| Wide Operating Range | Heating performance down to -13°F (-25°C) |
| Auto Swing Louvers | Automatic air flow direction adjustment for even comfort |
| Self-Diagnosis | LED indicators and error codes for simplified troubleshooting |
| High SEER/HSPF Ratings | Exceeds minimum federal efficiency standards |
| Refrigerant | Uses R-410A environmentally friendly refrigerant |
| Power Supply | 208/230V, 1-phase, 60Hz electrical connection |
Unpack and inspect all components. Ensure proper location for indoor and outdoor units.
WARNING! Installation must be performed by a qualified HVAC technician. Incorrect installation can cause injury, property damage, or void warranty. Handle refrigerant lines with care to avoid kinks.
After installation, power on system and perform initial setup.
CAUTION! Do not operate system without proper refrigerant charge verification. Allow system to complete startup sequence before adjusting settings.
Primary control via included wireless remote. Optional wall controller or smartphone app available.
Remote Control Functions: POWER, MODE (Auto, Cool, Heat, Dry, Fan), TEMP ▲/▼, FAN SPEED (Auto, Low, Med, High, Turbo), SWING (vertical/horizontal louvers), TIMER, CLOCK SET, FILTER RESET, LED INDICATOR (On/Off), QUIET MODE.
Operating Modes:
Auto: System automatically selects cooling or heating based on room temperature.
Cool: Standard air conditioning mode.
Heat: Heating mode with defrost cycle for outdoor unit.
Dry: Dehumidification mode with minimal cooling.
Fan: Circulates air without cooling or heating.
Advanced Settings (via remote): Follow Me (uses remote's built-in thermometer), I-Feel (precise temperature control), Economy Mode, Powerful Mode (rapid cooling/heating), Self-Clean (indoor coil drying).
For multi-zone configurations (connecting multiple indoor units to one outdoor unit).
Tip: For optimal performance, ensure total connected indoor unit capacity does not exceed outdoor unit capacity. Refer to combination tables in full installation manual.
Regular maintenance ensures efficiency, performance, and longevity.
WARNING! Always turn off power at circuit breaker before performing any maintenance. Do not use water, steam, or harsh chemicals to clean indoor unit. Do not attempt to service refrigerant circuit.
Wi-Fi Control: With optional interface (sold separately), control system remotely via smartphone app. Features include scheduling, energy usage monitoring, and away mode.
Quiet Mode: Reduces operating sound by lowering fan speeds, ideal for nighttime operation.
Self-Clean Function: Runs fan after cooling operation to dry indoor coil, reducing mold and mildew.
Defrost Cycle: In heating mode, system automatically reverses to melt frost on outdoor coil. Temporary fan stoppage and steam from outdoor unit are normal.
Unplug or turn off power before cleaning. Use only soft, dry cloth for indoor unit exterior. For outdoor unit, ensure fins are straight and unobstructed.
CAUTION! Do not use abrasive cleaners, solvents, or excessive water. Do not insert objects into indoor or outdoor unit openings. Keep flammable substances away from units.
This product complies with applicable U.S. safety and performance standards. EPA Refrigerant Handling Certification required for installation and service technicians. This unit contains refrigerant that must be recovered per EPA Section 608 regulations. For warranty registration and information, visit www.americanstandard.com. Manufactured for American Standard Heating & Air Conditioning. Mitsubishi Electric is a registered trademark. For technical support, contact 1-800-992-4998 or your local American Standard dealer.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| System not turning on | Power loss, tripped breaker, remote batteries | Check circuit breaker; replace remote batteries; ensure power switch on outdoor unit is ON. |
| No cooling/heating | Incorrect mode, set temperature, dirty filter | Set correct mode (Cool/Heat); lower/raise set temp; clean air filter. |
| Poor airflow | Dirty filter, blocked vents, low fan speed | Clean filter; ensure louvers are open; increase fan speed. |
| Water dripping indoors | Clogged drain line, improper installation | Check and clear condensate drain line; ensure proper slope. |
| Unusual noise | Loose parts, debris in fan, normal defrost | Tighten mounting brackets; clear debris from outdoor fan; defrost cycle noise is temporary. |
| Remote not working | Batteries, distance, obstacles | Replace batteries; point remote at indoor unit signal receiver; remove obstacles. |
| Error code on indoor display | System fault | Note flashing LED pattern or code; refer to full manual error code chart; contact qualified technician. |
Reset: Turn off system at circuit breaker for 5 minutes, then restore power to reset control board.
Service: For persistent issues, contact authorized American Standard dealer or 1-800-992-4998. Do not attempt to repair refrigerant system.