Cooling Fan Operation Selection - Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual

 Deceleration stop at motor thermal protection activation (Pr.875= "1")
• At activation of the external thermal relay (E.OHT), motor load (electronic thermal O/L relay) (E.THM) and PTC thermistor
(E.PTC) protective functions, the alarm output 2 (ER) signal is displayed, and the motor decelerates to stop. After it stops,
a fault signal (ALM) is output.
• When the ER signal comes ON, reduce the load or take other measures to allow the inverter to decelerate.
• During fault occurrence aside from the E.OHT, THM and E.PTC, the output is immediately shut off, and the fault is signal
(ALM) is output.
• To use the ER signal, set "97 (positive logic)" or "197 (negative logic)" in any of Pr.190 to Pr.196 (Output terminal
function selection) to assign the function to the output terminal.
When Pr.875 = "1"
Output
frequency
Fault output
(ALM, ALM2)
Alarm output 2
(ER)
NOTE
• Regardless of the Pr.875 setting, when the protective function is operating during position control, output is immediately shut
off. (No deceleration stop)
• For systems with a large load-side torque that prevents deceleration, setting value "0" is recommended.
• Changing the terminal assignment using Pr.190 to Pr.196 (Output terminal function selection) may affect the other
functions. Set parameters after confirming the function of each terminal.
Parameters referred to
Pr.190 to Pr.196 (Output terminal function

5.10.3 Cooling fan operation selection

A cooling fan is built into the inverter and its operation can be controlled.
Pr. Name
244 Cooling fan
H100 operation selection
 Cooling fan always ON (Pr.244 = "0")
• When Pr.244 = "0", the cooling fan operates at power ON. If the fan stops at this time, the inverter finds that the fan
operation is faulty and "
output (FAN) signal and the Alarm (LF) signal are output.
• For the terminal used for the FAN signal output, set "25 (positive logic)" or "125 (negative logic)" in any of Pr.190 to Pr.196
(Output terminal function selection) and for LF signal, set "98 (positive logic)" or "198 (negative logic)".
 Cooling fan operation control (Pr.244 = "1" (initial value), "101 to 105")
• The cooling fan operation is controlled when Pr.244 = "1". When the inverter is running, the cooling fan operates constantly.
When the inverter is stopped, the cooling fan operates depending on the temperature of the inverter heatsink. If the fan
stops although it meets the conditions for running, fan operation is regarded as faulty, [FN] is displayed on the operation
panel, and the fan signal and LF signals are output.
402
5. PARAMETERS
5.10 (H) Protective function parameter
Time
ON
ON
E.OHT E.OHT
occurrence display
selection)page 450
Initial value Setting range
0
1 1
101 to 105
" (FN), the indication of the Fan alarm, is displayed on the operation panel. The Fan fault
Description
A cooling fan operates at power ON. Cooling fan ON/OFF control is
invalid. (The cooling fan is always ON at power ON)
Cooling fan ON/OFF control is invalid.
The fan is always ON while the inverter is running. During a stop, the
inverter status is monitored and the fan switches ON/OFF according to
the temperature.
Cooling fan ON/OFF control is invalid.
Set the cooling fan stop waiting time within 1 to 5 seconds.