Mitsubishi Electronics FR-A500L Operatio, Panel Unit Name Description Display FR-PU04 FR-DU04

			PROTECTIVE FUNCTIONS
Operatio	Paramete
n Panel
	r Unit	Name	Description
Display
	(FR-PU04)
(FR-DU04)
			When the operation panel power (P5S of the PU connector) is shorted,
		Operation panel power	this function shuts off the power output. At this time, the operation
E.CTE	⎯⎯		panel (parameter unit) cannot be used and RS-485 communication from
		short circuit
			the PU connector cannot be made. To reset, enter the RES signal or
			switch power off, then on again.
			Inverters of 7.5K or less contains a brake resistor. When the
			regenerative brake duty from the motor has reached 85% of the
		Brake resistor overheat	specified value, pre-alarm (RB indication) occurs. If the specified value
⎯⎯	⎯⎯		is exceeded, the brake circuit operation is stopped temporarily to protect
		protection
			the brake resistor from overheating. (If the brake is operated in this
			state, regenerative overvoltage shut-off will occur.) When the brake
			resistor has cooled, the brake operation is resumed.
E.MB1 to	⎯⎯	Brake sequence error	This function stops the inverter output if a sequence error occurs
MB7			during the use of the brake sequence function (Pr. 278 to Pr. 285).
E.14	E.14	DC fuse blown	The inverter output will stop if the DC fuse blows.
			Brake unit cooling fin overheat, control board ambient temperature error,
E.15	E.15	Main circuit error	output overcurrent, cooling fan power supply error, capacitor
			overcurrent, cooling fin overheat, gate power supply error.
			Refer to the next page (page 27) for details.

Note: 1. If Pr. 195 (A, B, C terminal function selection) is as set in the factory.

2. The terminals used must be allocated using Pr. 190 to Pr. 195.

3. External thermal relay operation is only activated when "OH" is set in any of Pr. 180 to Pr. 186 (input terminal function selection).

4. Indicates that the stall prevention operation level has been set to 150% (factory setting). If this value is changed, stall prevention is operated at the new value.

5. Resetting method

When the protective function is activated and the inverter stops its output (the motor is coasted to a stop), the inverter is kept stopped. Unless reset, the inverter cannot restart. To reset the inverter, use any of the following methods: switch power off once, then on again; short reset terminal RES-SD for more than 0.1 seconds, then open; press the [RESET] key of the parameter unit (use the help function of the parameter unit). If RES-SD is kept shorted, the operation panel will show "Err." or the parameter unit will show that the inverter is being reset.

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