Shanghai Bestcomp Compressor Co., Ltd.
Fault shutdowns caused by external components of the controller can be eliminated by checking THIS FAULT or HISTORY FAULT as follows:
Common electrical faults and their causes
FAILURE | CAUSES | MEASUREMENT TO TAKE |
Air Exhaust Temperature too high | Bad vent condition, Oil lacking etc. | Check the vent condition and lubricant amount etc. |
Temperature Sensor Failure | Cable off or PT1OO damaged | Checking the wiring and PT100 |
Over Pressure | The pressure too high or the pressure sensor failure | Check the pressure and the pressure sensor |
Pressure Sensor Failure | Cable off, Sensor damaged or the cable connected reversed | Check the wiring and sensor transformer |
Water Lacking | Water Pressure switch damaged | Check the water pressure switch |
Phase Lacking | Power phase lacking or the Contactor terminal damaged | Check the power and contactors |
Overloaded | Voltage too low, tubes blocked, Bearing Wear off or other mechanical failure or wrong set data etc. | Check the set data, Voltage, bearings, tubes and other mechanical systems. |
Unbalance | Power unbalance, Contactor damaged or the internal open of the motor | Check the power, contactors and the motor |
Rotor Lock | Voltage too low, tubes blocked, Bearing Wear off or other mechanical failure or wrong set data etc. | Check the set data, Voltage, bearings, tubes and other mechanical systems. |
Short Circuit | Wrong Wiring, Incorrect Data setting etc. | Checking the wiring and set the data correctly |
Wrong Phase Sequence | Reversed Phase sequence or phase off | Check the wiring |
Fan stopped | Fan damaged, Contactor damaged, no control output | Check the wiring and control output |
Overload or Rotor locking during starting process | Host start time set to a value less than the star angel time delay | Reset the host starting time to be longer than star angel delay + Load delay time |
The main Contactor activate time to time | The emergency button loose | Check the wiring |