1. Dry transformer temperature controller has no display
Fault causes: ① The thermostat power supply is not connected; ② Fuse is blown.
Treatment methods: (1) switch on the power supply; ② Replace the fuse.
2, dry type transformer temperature controller shows a phase or three-phase flashing and shows "-op -"
Fault causes: (1) The corresponding input signal is greater than the measurement range of dry transformer temperature controller; ②Pt100 temperature sensor measurement loop has large contact resistance.
Treatment methods: ① Use Pt100 temperature sensor with temperature controller; ② Eliminate the contact resistance of the line.
3, dry type transformer temperature controller shows a phase or three-phase flashing and shows "-Oh -"
Fault causes: (1) the corresponding input signal is greater than the temperature controller measurement range; ② The sensor measurement loop has a large contact resistance.
Treatment methods: ① Use Pt100 temperature sensor with temperature controller; ② Eliminate the contact resistance of the line.
4. Dry type transformer temperature controller displays a phase or three phases flashing and displays "-ol -"
Fault causes: (1) The corresponding input signal is less than the temperature controller measurement range; ② There is a short circuit in the measuring circuit of the temperature sensor.
Treatment methods: ① Use Pt100 temperature sensor with temperature controller; ② Check the measurement line of the sensor.
5. Dry type transformer temperature controller flashes "-er -"
Fault causes: (1) Sensor measurement loop wiring error; ② The temperature controller is faulty.
Treatment methods: (1) Check the external connection of the temperature controller; ② Contact Changhui Instrument Manufacturing Co., LTD.
6, fixed display of a phase temperature
Fault cause: dry type transformer temperature controller in large value display state.
Solution: Press the large/circuit key to return the thermostat to the circuit display state.
7, the three-phase temperature is lower than 80oC, but the fan is still running
Fault causes: (1) The fan starting set value or return value is changed; ② The fan is started manually.
Treatment methods: (1) readjust the set value; ② Press the auto/Manual button to make the fan under automatic control.
8, from the dry transformer temperature controller display, three-phase temperature imbalance
Fault reasons: ①Pt100 platinum resistance is not fixed into the temperature hole; ② The three-phase temperature of the transformer is different.
Treatment methods: ① re-fixed platinum resistance; ② Normal phenomenon.
9. The temperature of the fan is not reached, but the fan runs automatically
Fault causes: ① The fan is started manually; ② The system fan starts and stops at a scheduled time.
Treatment methods: ① press the ▲ key to close the fan; ② It is a normal phenomenon.
10. After manually starting the fan on the dry transformer temperature controller, the fan cannot be manually shut down
Fault cause: The measured temperature is right between the temperature of automatic starting and stopping of the fan.
Treatment method: It is a normal phenomenon.
