System error code 5103 in bedroom number 5, Air Conditioning indoor unit. The error is triggered due to abnormal Thermistor reading.
One of the following reasons may be the cause:
- Return air
- Liquid pipe sensor
- Gas pipe sensor
The traditional course of action
Visit the site, access the system physically and
- Check if the sensors are fixed properly to the Terminal Block.
- Check the resistance of the sensors ( 5.3k ohm @ 77°F).
- Check if faulty PCB not reading correctly, collect new data and verify the fix.
CoolAutomation Remote diagnostics course of action
- Remote diagnostics: Service engineer assessed the CoolAutomation Remote diagnostics solution to check the system history.
- Searching for the error cause: Looking at the AC unit's operation data for the last hour, all the thermistor readings are normal.
- Using historic data: Looking at the info generated by the CoolAutomation Remote diagnostics solution for the last 7 days, engineers saw spikes in the Gas Pipe Sensor. Therefore, indicates that this sensor is faulty and must be replaced (it is less likely that the indoor unit PCB is mistranslating the temperature reading only occasionally).
Using Traditional HVAC service vs remote
Traditional HVAC service
- Multiple trips to the site are likely, as an engineer may need several visits before he can witness the error in real-time.
- Many hours of engineer time.
- Multiple days of system downtime.
CoolAutomation Remote diagnostics solution
- A single trip to the site.
- One hour of VRF engineer time on-site.
- Minimal system downtime.
Benefits of the solution
- Minimal customer disturbance.
- Only trip to site versus multiple visits.
- Simplified data analysis.
