5-1 Protective Functions and Troubleshooting 5 Maintenance Operations *1. The reset command through the RS terminal or STOP/RESET key is not accepted. Turn off the power. *2. The reset operation via the Digital Operator is not accepted. Be sure to reset via the RS terminal. 5-4 Name Description Display on Digital Operator Check point and remedy Reference page Temperature error when the rotation speed of the cooling fan decreases Appears if a decrease of the cooling fan rotation speed has been detected when a temperature error occurs. ek2k0. Has the cooling efficiency been reduced? (Replace the cooling fan.) Is there any clogging in the fin?
(Clean the fin.) Temperature error Shuts off the output if the temperature has risen in the main circuit because of the high ambient temperature. ek2k1. Have you installed the Inverter vertically? (Installation check) Is the ambient temperature high? (Decrease the ambient temperature.) Gate array communications error Trips when a fault is detected in communication behavior between the built-in CPU and the gate array. ek2k3. Is there any large noise source around? (Countermeasures against noise) Has the cable been disconnected?
(Check the connector.) Input phase loss protection Prevents Inverter damage due to input phase loss when the input phase loss protection selection is enabled (b006=01), and trips. Trips when the phase loss time is approximately 1 s or more. ek2k4. Is there any input power supply phase loss? (Check the input wiring.) Is there a contact failure for MCB and/or Mg? (Replace MCB, Mg.) Main circuit error *1 Trips when the gate array cannot confirm IGBT ON/OFF because of a main element failure, a load short circuit, or an erroneous operation resulting from noise interfusion. ek2k5. Is there any large noise source around? (Countermeasures against noise) Has the main element been damaged?
Is there any output short-circuit? (Check the IGBT.) The Inverter has a failure. (Repair) IGBT error Shuts off the Inverter output to protect the main element when a momentary overcurrent, temperature error in the main element, or drop of the main element driving power supply occurs. (Retry operation cannot be performed for this trip.) ek3k0. Is there any output short-circuit? (Check the output wires.) Is there any ground fault? (Check the output wires and motor.) Has the main element been damaged? (Check the IGBT.) Is there any clogging in the fin?
(Clean the fin.) Thermistor error Shuts off the Inverter output when detecting the thermistor resistance value inside the motor connected to the TH terminal and resulting motor temperature rise. ek3k5. Is the motor temperature too high? (Check the motor temperature.) Is there any damage to the thermister inside the motor? (Check the thermistor.) Is there any noise interfusion in the thermister signal? (Separate the wiring.) 2-9 4-72 ek2k0. ek2k1. ek2k3. ek2k4. ek2k5. ek3k0. ek3k5.