Mitsubishi Electric FR-HC2-7.5K Instruction Manual page 137

Causes and corrective actions
Operation Panel
Indication
Name
Description
Checkpoint
Corrective action
Operation Panel
Indication
Name
Description
Checkpoint
Corrective action
Operation Panel
Indication
Name
Description
Checkpoint
Corrective action
Operation panel
indication
Name
Description
Check point
Corrective action
Operation panel
indication
Name
Description
Check point
Corrective action
130
E.ILF
Input phase loss
Converter trips when one phase of the three phase power input is lost.
Check for a break in the cable for the three-phase power supply input.
 Wire the cables properly.
 Repair a break portion in the cable.
E.OHT
External thermal relay operation
If an overheat protection device such as a thermostat activates, the converter operation is stopped.
This function is available when "4" (OH signal) is set to any of Pr. 3 to Pr. 7 (input terminal function selection).
This protective function is not available in the initial status (OH signal is not assigned).
 Check for the overheat of the overheat protection peripheral devices such as a thermostat.
 Check that the value "4" (OH signal) is set correctly to any of Pr. 3 to Pr. 7 (input terminal function selection).
 Check the wiring.
 Even if the thermostat restarts automatically, the converter does not restart unless it is reset.
E. 2
HC2 dedicated board disconnection
Stops the converter operation when contact fault between the converter and the connecting part of the HC2
dedicated board occurs.
 Check that HC2 dedicated board is connected to the connector securely.
 Check for excess electrical noises around the converter.
 Connect the HC2 dedicated board securely.
 Take measures against noises if there are devices producing excess electrical noises around the
converter.
If the problem still persists after taking the above measure, please contact your sales representative.
E. 3
Option fault
Stops the converter operation if a contact fault or the like of the connector between the converter and
communication option occurs.
Appears when the switch for the manufacturer setting of the plug-in option is changed.
 Check that the plug-in option unit is plugged into the connector securely.
 Check for excess electrical noises around the converter.
 Check the switch position for the manufacturer setting of the plug-in option.
 Connect the plug-in option securely.
 Take measures against noises if there are devices producing excess electrical noises around the
converter.
If the problem still persists after taking the above measure, please contact your sales representative.
 Return the switch position for the manufacturer setting of the plug-in option to the initial status. (
Refer to the instruction manual of each option)
E.OP3
Communication option fault
Stops the converter operation when a communication line fault occurs in the communication option.
 Check for a wrong option function setting and operation.
 Check that the plug-in option unit is plugged into the connector securely.
 Check for a break in the communication cable.
 Check that the terminating resistor is fitted properly.
 Check the option function setting, etc.
 Connect the plug-in option securely.
 Check the connection of communication cable.
 Connect the terminating resistor correctly.
FR-PU07 Input phase loss
FR-PU07
FR-PU07
FR-PU07
FR-PU07 Option slot alarm 3
OH Fault
Fault 2
Fault 3