十种常见干式变压器温控器显示故障处理方法

In view of the apparent faults that users may encounter in the actual use of the SWP-C80 dry-type transformer thermostat, Changhui Instrument provides ten common dry-type transformer thermostat display fault handling methods and fault handling ideas for the reference of instrument workers , It is convenient for everyone to quickly solve the problem of dry-type transformer thermostat failure.
SWP-C80 Dry-type Transformer Thermostat
Ten common dry-type transformer thermostat display fault treatment
1. The temperature controller of dry-type transformer has no display
Reasons for failure: ①The power of the thermostat is not connected; ②The fuse is blown.
Treatment method: ①Turn on the power; ②Replace the fuse.

2. The temperature controller of dry-type transformer displays a certain phase or three phases flashing and displays "-OP-"
The cause of the fault: ①The input signal of the corresponding phase is greater than the measuring range of the dry-type transformer thermostat; ②The Pt100 temperature sensor measuring circuit has a larger contact resistance.
Treatment method: ①Select the Pt100 temperature sensor matched with the thermostat; ②Eliminate the line contact resistance.

3. The temperature controller of dry-type transformer displays a certain phase or three phases flashing and displays "-OH-"
The cause of the fault: ①The input signal of the corresponding phase is greater than the measuring range of the thermostat; ②The sensor measuring circuit has a larger contact resistance.
Treatment method: ①Select the Pt100 temperature sensor matched with the thermostat; ②Eliminate the line contact resistance.

4. The temperature controller of the dry-type transformer displays a certain phase or three phases all flashing and displays "-OL-"
The cause of the fault: ①The input signal of the corresponding phase is less than the measuring range of the thermostat; ②The measuring circuit of the temperature sensor has a short circuit.
Treatment method: ①Select the Pt100 temperature sensor matched with the thermostat; ②Check the sensor measurement line.

5. The dry-type transformer thermostat flashes "-Er-"
The cause of the failure: ①The wiring of the sensor measurement circuit is incorrect; ②The internal fault of the thermostat.
Solution: ①Check the external wiring of the thermostat; ②Contact Changhui Instrument Manufacturing Co., Ltd.

6. Fixed display of the temperature of a certain phase
The cause of the fault: the dry-type transformer thermostat is in the maximum display state.
Solution: Press the maximum/tour key to make the thermostat return to the tour display state.

7. The three-phase temperature is lower than 80oC, but the fan is still running
The cause of the failure: ①The fan start setting value or return difference value is changed; ②The fan is in the manual startup state.
Treatment method: ①Re-adjust the set value; ②Press the automatic/manual key to make the fan in the automatic control state.

8. Look at the three-phase temperature imbalance from the display of the dry-type transformer thermostat
The cause of the fault: ①Pt100 platinum resistance is not fixed into the temperature measuring hole; ②The three-phase temperature of the transformer is different.
Treatment method: ①Re-fix the platinum resistance; ②Normal phenomenon.

9. The temperature of the fan is not reached, but the fan runs automatically
The cause of the failure: ①The fan is in the state of manual startup; ②The system fan has the function of regular start and stop.
Treatment method: ①Press the ▲ key to turn off the fan; ②It is a normal phenomenon.

10. After manually starting the fan on the dry-type transformer thermostat, the fan cannot be manually turned off
The cause of the failure: The measured temperature value at this time is just between the temperature of the automatic start and stop of the fan.
Treatment method: It is a normal phenomenon.