Warning - Johnson Controls Penn VFD68D Series Technical Bulletin

Table 43: Mode Designation Error
Operation Er4
Panel
Indication
Description •
•
Check Point •
•
Corrective •
Action •
Table 44: VFD Reset
Operation Err.
Panel
Indication
Description •
•
Corrective •
Action

Warning

When a warning occurs, the output is not shut off.
Table 45: Stall Prevention (Overcurrent)
Operation OL
Panel
Indication
Description During
acceleration
During
constant-
speed
operation
During
deceleration
Check Point •
•
•
•
•
Corrective •
Action •
•
•
Appears if a parameter setting is attempted in the External or NET operation mode with P. 77 set
to other than 2.
Appears if a parameter setting is attempted when the command source is not at the operation
panel.
Check that operation mode is PU operation mode.
Check the P. 77 setting.
After setting the operation mode to the PU operation mode, set the parameter.
After setting P. 77 to 2, set the parameter.
Executing reset using RES signal, or reset command from communication or PU
Displays at powering OFF.
Turn OFF the reset command.
When the output current of the VFD exceeds the stall prevention operation level
(P. 22), this function stops the increase in frequency until the overload current
decreases to prevent the VFD from resulting in overcurrent trip. When the overload
current has reduced below stall prevention operation level, this function increases
the frequency again.
When the output current of the VFD exceeds the stall prevention operation level
(P. 22), this function reduces frequency until the overload current decreases to
prevent the VFD from resulting in overcurrent trip. When the overload current has
reduced below stall prevention operation level, this function increases the frequency
up to the set value.
When the output current of the VFD exceeds the stall prevention operation level
(P. 22), this function stops the decrease in frequency until the overload current
decreases to prevent the VFD from resulting in overcurrent trip. When the overload
current has decreased below stall prevention operation level, this function
decreases the frequency again.
Check that the Pr. 0 setting is not too large.
Check that the Pr. 7 and Pr. 8 settings are not too small.
Check that the load is not too heavy.
Check for any failures in peripheral devices.
Check that the value of P. 22 is appropriate.
Increase or decrease the Pr. 0 setting by 1% and check the motor status.
Set a larger value in Pr. 7 and Pr. 8.
Reduce the load weight.
Set stall prevention operation current in P. 22 (The default value is 150%.) The acceleration/
deceleration time may change. Increase the stall prevention operation level with P. 22.
VFD68 Variable Frequency Drives
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