Mitsubishi Electronics FR-S500 instruction manual Minor failures

				Errors (Alarms)
Operation Panel Indication	PUE		FR-PU04	PU Leave Out
Name	Parameter Unit	disconnection
	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 "disconnected PU detection/PU
	setting lock".
Check point	• Check that the FR-PU04 is fitted securely.
	• Check the setting of the communication parameter n17
	"disconnected PU detection".
Corrective action	Fit the FR-PU04 securely.
Operation Panel Indication	RET		FR-PU04	Retry No Over
Name	Retry count over
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
Description	If the arithmetic operation of the built-in CPU does not end within 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 minor fault signal. (Set "98" in any of Pr. 64, Pr. 65 (output terminal function selection). Refer to page 100.)

Operation Panel Indication	FN	FR-PU04	FN
Name	Fan trouble
Description	For the inverter which contains a cooling fan,		appears on the
	operation panel when the cooling fan stops due to a fault.
Check point	Check the cooling fan for a fault.
Corrective action	Replace the fan.

PROTECTIVE FUNCTIONS

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