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
Mitsubishi Electric Vrf Remote Diagnostics And Service Case Study Error Code 5013
Mitsubishi Electric VRF
Customer Challenge
The Traditional Course Of Action
Visit the site, access the system physically and:
- Check if the Sensors fixed properly to the Terminal Block
- Check resistance of the sensors (5.3k ohm @ 25°C)
- Check if Faulty PCB not reading correctly, collect new data and verify the fix
Remote Service Course Of Action
1
Remote Diagnostic
Service Engineer accessed CoolAutomation's HVAC Remote Diagnostics solution to check system history.
2
Searching for the Error Cause
Looking at the AC unit's operation data for the last hour, all thermistor readings are Normal.
3
Using Historic Data
Looking at the HVAC Remote Diagnostics solution historical data for the last 7 days, we see spikes in the Gas Pipe Sensor. Therefore, it seems that this sensor is faulty and must be replaced (it is less likely that the indoor unit PCB is mistranslating the temp reading only sometimes). Also, the sensor connection should be checked to make sure it is properly placed.
Using Traditional HVAC Service Vs Remote - Comparison Table
| Traditional HVAC Service | Remote Service |
|---|---|
Multiple trips to the site are likely, as an engineer may need several visits before he can witness the error in real-time | A single trip to the site |
Many hours of engineer time | One hour of engineer time on-site |
Multiple days of system downtime | Minimal system downtime |
