NYC’s Largest & Most Trusted Mitsubishi Certified HVAC Experts
American HVAC Corp stands as New York City’s leading Mitsubishi Certified HVAC repair and installation company. We provide expert Mitsubishi HVAC solutions for residential and commercial properties across all five boroughs—Manhattan, Brooklyn, Queens, Bronx, and Staten Island.
Our team comprises NATE and EPA-certified technicians expertly trained in the installation, maintenance, and repair of Mitsubishi equipment. Utilizing advanced Mitsubishi diagnostic tools, we rapidly identify issues and restore system performance to ensure your comfort is uninterrupted.
Mitsubishi Certified HVAC Services
American HVAC Corp offers full-service Mitsubishi HVAC installation, repair, and maintenance for residential and commercial customers. We cover a wide range of Mitsubishi product lines, including:
- M-Series Mitsubishi HVAC Units
Flexible single-zone and multi-zone systems with various indoor unit styles—wall-mounted, floor-mounted, ceiling cassette, and ducted options—engineered to fit diverse space requirements. - P-Series Mitsubishi HVAC Units
Efficient heating and cooling with intelli-HEAT dual-fuel operation, servicing popular models such as PAA, PCA, PEAD, PVA, SLZ, SEZ, SVZ, PLA, PKA, PUZ, PUY, SUZ, and PUZ-HA. - Mitsubishi Commercial HVAC Line
- City Multi VRF Systems: Sophisticated multi-zone temperature control tailored for commercial buildings.
- SMART MULTI Systems: Space-efficient multi-zone HVAC solutions.
- R2-Series, Y-Series, S-Series: Durable commercial-grade units designed for reliability.
- Heat2O Hydronic Systems: Innovative hydronic heating for effective warmth.
American HVAC Corp is the NYC leader in installation and repair of Mitsubishi City Multi VRF systems throughout all boroughs.
Mitsubishi Mini Split Repair & Installation by American HVAC Corp
We specialize in Mitsubishi Mini Split systems — highly efficient ductless HVAC solutions ideal for NYC’s varied residential and commercial settings. These systems provide customizable heating and cooling without the need for ductwork, perfect for spaces where traditional HVAC installation is impractical.
Our services include:
- Expert installation of Mitsubishi Mini Split units optimized for your specific space and comfort needs.
- Precise diagnosis and repair of common Mini Split issues such as refrigerant leaks, compressor failures, sensor malfunctions, and communication errors.
- Routine maintenance to enhance efficiency, reliability, and extend system lifespan.
Using advanced Mitsubishi diagnostic equipment, our certified technicians swiftly troubleshoot Mini Split problems, minimizing downtime and restoring comfort fast.
Mitsubishi HVAC Error Codes & Troubleshooting Guide
Mitsubishi HVAC systems use LED blinking signals and diagnostic error codes to communicate system faults. Recognizing these alerts helps identify problems early, though professional diagnosis and repair are recommended.
Common Mitsubishi HVAC Error Codes
| Code | Description |
|---|---|
| P1 | Intake sensor error |
| P2–P9 | Pipe sensor error (liquid or 2-phase) |
| P4 | Drain sensor error |
| P5 | Drain pump error |
| P6 | Freezing/overheating safeguard operation |
| P8 | Pipe temperature error |
| E0 | Remote controller signal error |
| E6, E7 | Indoor/outdoor unit communication error |
| E9 | Outdoor unit communication error |
| Fb | Indoor unit control system error |
| U4 | Outdoor unit transmission error |
| U5 | Abnormal heatsink temperature |
| U6 | Compressor overcurrent/power module fault |
| U7 | Superheat abnormality (low discharge temp) |
| U8 | Outdoor fan safeguard stop |
| U9 | Voltage or current sensor abnormality |
| PA | Forced compressor error |
| EE | Communication error between units |
Selected 4-Digit Mitsubishi HVAC Error Codes
| Code | Description |
|---|---|
| 0403 | Serial communication error |
| 0900 | Test run |
| 1102 | Discharge temperature fault |
| 1301 | Low-pressure fault |
| 1302 | High-pressure fault |
| 1500 | Refrigerant overcharge |
| 2500 | Drain sensor submerged |
| 2502 | Drain pump fault |
| 2503 | Drain sensor fault |
| 2600 | Water leak |
| 4102 | Open phase |
| 4106 | Transmission power supply fault |
| 4115 | Power supply sync error |
| 4116 | RPM/motor error |
| 4220 | Abnormal bus voltage |
| 4225 | Low bus voltage |
| 4230/4260 | Heatsink overheat protection activated |
| 4240 | Overload protection activated |
| 4250 | Overcurrent protection activated |
| 4255 | Outdoor unit fan error |
| 5101 | Temperature sensor fault |
| 5102 | Return air thermistor fault |
| 5110 | Outdoor inverter heatsink thermistor error |
| 5201 | Pressure sensor fault |
| 5301 | Current sensor fault |
| 5701 | Loose float switch |
| 6201 | Remote controller issue |
| 6600 | Address overlap |
| 6601 | Polarity setting error |
| 6602 | Transmission processor hardware error |
| 6603 | Transmission line busy |
| 6606 | Communication fault |
| 6607 | No ACK |
| 6608 | No response |
| 6831/6834 | MA controller signal reception error |
| 6832/6833 | MA controller communication fault |
| 7100 | Total capacity error |
| 7101 | Capacity code setting error |
| 7102 | Wrong number of connected units |
| 7105 | Address setting error |
| 7106 | Attribute setting error |
| 7110 | Signal transmission error |
| 7111 | Remote controller sensor fault |
| 7113 | Function setting error |
| 7117 | Model setting error |
| 7130 | Incompatible unit combination |
Expanded Mitsubishi HVAC Error Codes & Troubleshooting Guide
Additional error codes technicians frequently encounter:
| Code | Description | Notes / Troubleshooting Tips |
|---|---|---|
| C0 | Outdoor unit fan motor locked | Inspect fan motor for obstruction or failure |
| C1 | Outdoor unit fan motor abnormal current | Check fan motor winding and capacitor |
| C2 | Outdoor unit compressor motor abnormal current | Possible motor winding damage or faults |
| C3 | Compressor overheating | Check refrigerant and airflow |
| C4 | Compressor motor locked | Possible seizure; inspect mechanical parts |
| C5 | Compressor current overload | Potential short circuit or stuck compressor |
| C6 | Compressor inverter fault | Inverter board issues; repair may be needed |
| C7 | Outdoor unit inverter temperature sensor error | Check sensor wiring and unit sensor |
| E1 | Outdoor unit discharge pipe temperature sensor error | Affects defrost; inspect sensor and wiring |
| E2 | Outdoor unit suction pipe temperature sensor error | May cause compressor malfunction |
| E3 | Outdoor unit ambient temperature sensor error | Affects performance monitoring |
| F0 | Indoor unit filter sign error or clogged filter | User should clean or replace filters |
| F1 | Indoor unit room temperature sensor error | Check sensor and wiring |
| F2 | Indoor unit evaporator temperature sensor error | Prevents freeze damage |
| F3 | Indoor unit defrost temperature sensor error | Can cause defrost cycle problems |
| F4 | Indoor unit drainage pump error | Check pump and drainage lines |
| F5 | Indoor unit fan motor locked | Inspect fan motor and blades |
| F6 | Indoor unit communication error | Check wiring between indoor/outdoor units |
| F7 | Indoor unit PCB malfunction | Control board may require replacement |
| F8 | Indoor unit overcurrent error | Possible fan motor overcurrent |
| H1 | Defrost control error | Sensor or control board issue |
| H2 | Heat exchanger temperature sensor error | Sensor failure |
| L1 | Indoor unit liquid pipe temperature sensor error | Affects refrigerant temp readings |
| L2 | Indoor unit gas pipe temperature sensor error | Impacts refrigerant monitoring |
| P0 | Outdoor unit power supply error | Voltage drop or phase loss |
| P1 | Outdoor unit intake air sensor error | Sensor problem affecting air intake temp |
| P2 | Outdoor unit refrigerant leak detected | Call for leak inspection |
| P3 | Outdoor unit inverter PCB fault | May require inverter board repair/replacement |
| P4 | Outdoor unit drain sensor error | Sensor malfunction |
| U1 | Indoor/outdoor unit communication error | Check wiring and communication lines |
| U2 | Outdoor unit inverter failure | Requires technician service |
Common Mitsubishi Mini Split Error Codes
| Code | Description | Troubleshooting Tips |
|---|---|---|
| E4 | Outdoor unit fan motor speed error | Inspect motor and capacitor |
| E5 | Indoor unit fan motor speed error | Check indoor fan motor and PCB |
| E10 | EEPROM data error | May require system reset or repair |
| E20 | Indoor unit communication error | Verify wiring and connections |
| E30 | Outdoor unit communication error | Inspect outdoor control board wiring |
Mitsubishi HVAC LED Blinking Codes Explained
- 1 blink: Indoor sensor error or indoor fan motor lock
- 2 blinks: Indoor EEPROM error or communication failure
- 3 blinks: Outdoor sensor error or high-pressure protection
- 4 blinks: Outdoor fan motor error
- 5 blinks: Compressor overload protection triggered
- 6 blinks: Communication failure between indoor and outdoor units
- 7 blinks: Refrigerant leak or abnormal pressure detected
- 8 blinks: Freeze protection active
- 9 blinks: Power supply error or phase imbalance
Blinking Patterns:
- Rapid blinking usually indicates communication errors between units.
- Slow blinking often signals sensor issues.
- Alternating blinking may indicate compressor or fan motor faults.
Our Mitsubishi Certified technicians expertly interpret these signals using proprietary diagnostic tools to identify and resolve root causes promptly.
Why Choose American HVAC Corp for Mitsubishi Certified HVAC?
- Certified Technicians: Our experts hold NATE and EPA certifications along with specialized Mitsubishi training.
- Advanced Diagnostic Tools: We employ Mitsubishi proprietary equipment for precise troubleshooting.
- City Multi VRF Specialists: Extensive NYC experience with Mitsubishi’s commercial VRF systems.
- Reliable & Prompt Service: Fast diagnostics and repairs minimize downtime.
- Full NYC Coverage: Serving Manhattan, Brooklyn, Queens, Bronx, and Staten Island with 12 fully stocked service vans.
Contact American HVAC Corp Today
For expert Mitsubishi Certified HVAC repair, installation, and maintenance in NYC, trust American HVAC Corp. Schedule service with our certified technicians to ensure fast, dependable comfort restoration.
