Temperature controller fault one:? No display of the device after power on.
Solution:First of all, check the equipment segment is not already connected to the zero fire line, and need to ensure that the zero fire line power supply can work properly.
Then start checking the LCD motherboard and equipment drive power supply between the line is not a loose phenomenon, need to take relevant fastening measures. Pay attention to the thermostat switch? Is not already open, and meet the required standards.
Temperature controller in the wiring, it is necessary to check in advance the wiring power supply voltage, current and other issues.
Temperature controller failure two: the device shows normal, but the control error.
Solution: First of all, you need to check the equipment is not connected to the line, contact is not good. Then you need to check whether the wires are connected correctly.
Expanded Information:
1, the thermostat does not display after power on.
Check whether the power supply of the thermostat has been connected; check whether the power switch of the thermostat is in the on position; check whether the power supply voltage of the thermostat is within the permissible voltage range.
2. After manually starting the fan, it is not possible to manually turn off the fan.
Measuring the temperature value is higher than the fan's automatic start-stop temperature range, is a normal phenomenon.
3, has not reached the temperature of the fan turned on, but the fan started on its own.
Whether the fan is in a manual state, press the "manual/automatic" pieces off the fan; system timer start-stop fan function is in effect, is a normal situation.
4, the thermostat has a one or two shows -op-, the other phase shows normal.
Check the sensor DB9 plug female is enough to reliably connected to the DB9 seat above; check the sensor probe appearance whether there is obvious scarring, and replace the new sensing cable.
If this phenomenon occurs in the field, it can be basically judged to be the sensing cable or sensing head failure, or sensing connector is not connected properly, the thermostat itself is not a problem.
Because the internal hardware and software of the thermostat is the same module to deal with different channel signals, so that as long as there is a phase of the temperature is normal, can basically rule out the failure of the thermostat, should focus on checking the sensor cable or directly replace the sensor cable.