Mitsubishi FR - S500 Minor failures, For only the type having the RS-485 communication function

Operation Panel Indication	PUE	FR-PU04	PU Leave Out
Name	PU disconnected (*3)
	Stops the inverter output if communication between inverter and
Description	PU is suspended, e.g. if the PU is disconnected with "1" set in the
	communication parameter n17 "PU disconnection detection/PU
	setting lock".
	Check that the FR-PU04 is fitted securely.
Check point	Check the setting of the communication parameter n17 "PU
	disconnection detection".
Corrective action	Fit the FR-PU04 securely.

*3. For only the type having the RS-485 communication function.

Operation Panel Indication	RET	FR-PU04	Retry No Over
Name	Retry count
Description	If operation cannot be resumed properly within the number of
	retries set, this function stops the inverter output.
Check point	Find the cause of alarm occurrence.
Corrective action	Eliminate the cause of the error preceding this error indication.

Operation Panel Indication	CPU	FR-PU04	CPU Fault
Name	CPU error
	If the arithmetic operation of the built-in CPU does not end within
Description	a predetermined period, the inverter self-determines it as an
	alarm and stops the output.
Check point		
Corrective action	Please contact your sales representative.

(2) Minor failures

When the protective function is activated, the output is not shut off. You can make parameter setting to output the light fault signal. (Set "98" in any of Pr. 64, Pr. 65 (output terminal function selection). Refer to page 90)

Operation Panel Indication	FN	FR-PU04	FN
Name	Fan trouble
	For the inverter which contains a cooling fan,		appears on the
Description	operation panel when the cooling fan stops due to a fault or
	operates differently from the setting of Pr. 76 "cooling fan
	operation selection".
Check point	Check the cooling fan for a fault.
Corrective action	Change the fan.

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