Mobile Technician App - Technician Diagnostic Guide
The Mobile Technician app is a free diagnostic support tool for air conditioning technicians. It is available for iOS and Android devices and provides fault-code information, troubleshooting guidance and conversion tools for Standard and VRF products.
Primary use: Use the app on site to identify fault codes, review check points and convert thermistor, pressure and refrigerant pressure/temperature values without needing to contact Technical Support for routine diagnostic information.
What the App Can Do
- Error-code troubleshooting for indoor units.
- Error-code troubleshooting for outdoor units.
- Error-code troubleshooting for wired wall controllers.
- Support for both Standard and VRF products.
- Indoor and outdoor LED fault-code identification.
- Detailed fault check points and troubleshooting guidance.
- Thermistor value conversion.
- Pressure sensor conversion.
- Pressure / temperature charts.
- Searchable model information.
Supported Product Information
The source material documents the app as covering VRF and G-series products, including model families such as ASTG and ARTG. Later material describes the app more broadly as covering Standard and VRF products.
Model coverage: Model availability depends on the version of the app and the database included with it. If a particular older model cannot be found, use the applicable service manual or contact Technical Support.
How to Find the App
Search for MOBILE TECHNICIAN on the appropriate app store for your device.
| Device | Where to Search |
|---|---|
| iPhone / iPad | Apple App Store - search for MOBILE TECHNICIAN |
| Android | Google Play - search for MOBILE TECHNICIAN |
Using the App for Fault Diagnosis
- Open the Mobile Technician app.
- Search for or select the applicable unit model.
- Select the relevant fault type - for example wired controller, indoor LED or outdoor LED indication.
- Select the displayed error code or LED pattern.
- Review the fault description and listed check points.
- Carry out the diagnostic checks in conjunction with the applicable service manual and normal electrical/refrigeration safety procedures.
Thermistor Conversion
The thermistor conversion function can be used to compare measured sensor values against expected values.
Depending on the applicable sensor, the converter can assist with:
- Temperature
- Resistance
- Voltage
Pressure and Refrigerant Tools
- Pressure sensor conversion.
- Pressure / temperature reference charts.
- Support for comparing live refrigeration readings with expected operating values.
Benefits for Technicians
- Reduces routine calls to Technical Support.
- Reduces waiting time when diagnosing faults.
- Can be accessed outside normal support hours, including weekends.
- Reduces diagnostic time on site.
- Provides a consistent troubleshooting reference.
- Easy to use and navigate on a mobile device.
Important: The Mobile Technician app is a diagnostic aid. Always follow the applicable service manual, electrical isolation requirements and refrigerant safety procedures when testing or repairing equipment.