DESC:FIELD OF THE INVENTION [0001] The present disclosure relates to managing power for electric loads and particularly relates to identification of faults while managing variations in input voltage to an electric load such as a Brushless Direct Current (BLDC) fan. BACKGROUND [0002] A power supply supplies electric power to an electrical load such as an electronic device. The main purpose of the power supply is to provide power/electric current at the correct required voltage, current, and frequency for the optimal functioning of the load. The load may be an electronic device. Electronic devices are sensitive to the quality of the power input from the power supply. For optimal and efficient performance of the electronic devices and to protect them, the power supplied by the power supply remain stable at predefined standard values as per the requirement and usage. For example, it may be desired that the voltage supplied remains at 220VAC, 50Hz, etc. [0003] Besides, during electrical maintenance work on a power grid or due to weather conditions or faults, the power supply may not be at the desired standard quality. Due to conditions beyond control, the power grid may be in a continuous On-Off state affecting the quality of the power supply available to the load. [0004] Further, such quality issues in the power supply may not always be noticeable to an end user but still have an adverse effect on the load such as the electronic devices. Besides, the end user does not have control over the power supply. Even with the use of an inverter or a UPS (Uninterruptible Power Supply) system, there may be unavoidable continuous switching-over between the inverter/UPS and the power supply affecting quality of the power available to the load. This may lead to irregular under-voltage conditions, where AC (Alternating Current) supply voltage may drop below desired operating condition. [0005] In any case, it is desired to protect the electronic devices from such quality issues in the power supply. It is also desired that such quality issues with the input power are also brought to the notice of the end user at least as an indication of presence of fault so that they may take necessary corrective action. It will be highly desirable if both protection of the device and alerting a user can be achieved simultaneously. [0006] Further, in case of a conventional induction fans, a regulator is generally used to control the speed of the fan. The function of regulator is to regulate/control the speed of the fan as per the desire of the end-user. Traditional regulators used with conventional induction fans are generally wall-mounted at the site and are connected in series with the conventional induction fans. As a knob of the traditional regulators is rotated to different preset positions, different amount of resistance/capacitance gets inserted into the circuit. The traditional regulators change the speed of the fan by reducing AC voltage or by chopping the waveform of the input power. However, these regulators which have been used traditionally for conventional induction fans are not appropriate for new-age electronic devices such as an energy-efficient Brushless DC (BLDC) fan. [0007] For the BLDC fans to work efficiently, the AC voltage from the power supply needs to be converted to DC (Direct Current). To address this, an SMPS (Switched Mode Power Supply) is used to convert AC of the power supply to DC, maintain PF (Power Factor), and current iTHD (Total Harmonic Distortion). [0008] However, it has been observed that since the traditional regulator is already installed for the induction fans, there are cases when the traditional regulator is inadvertently connected as a default retrofit when the end-user switches to the new electronic BLDC fan. But this is bound to affect the BLDC fan performance and may damage the BLDC fan. When the traditional fan regulator of the conventional induction fan is inadvertently used with the BLDC fan, it may create stress on the electronic components of the BLDC fan and affect its performance such as uninitiated and undesired fan behavior such as speed variation and switching on/off. [0009] Further, the traditional regulator may be of different types such as a step-regulator and a dimmer type. Step regulators are commonly available in four to five steps/mode plus an Off mode. At a step “0”, the step regulator is in an OPEN position and no power / current is available at output. Therefore, no supply is fed to the fan. For steps 1-5: Different corresponding capacitors are inserted in the circuit which may have values C1, C2, C3, C4, and C5. An example of relationship among C1-C5 may be: C1