Delta VFD-B Series User Manual

Chapter 7 Troubleshooting |VFD-B-P Series
7-4 Revision April 2009, SW V1.00
7.5 Over Heat (OH)
AC motor drive overheats
Check if temperature of heat sink
3-20HP: greater than 100
O
-60HP: greater than 90
O
C
25 C
Yes
No
Temperature detection malfunctions.
Please contact DELTA.
No
No
Yes
Yes
Yes
No
Reduce load
If cooling fan functions normally
Change cooling fan
Check if surrounding temperature
is within specification
Adjust surrounding temperature
to specification
Maybe AC motor drive has malfunction or
misoperation due to noise. Please contact
DELTA.
Is load too large
Using Delta optional heatsink?
No
Yes
Check if the applying area and thickness
of thermal grease between the AC drive
and heatsink is within specification. Refer
to chapter 2 for details.
7.6 Overload
OL1/ OL2
OL
Reduce load or increase the power of AC motor drive
Check for correct settings at
Pr. 06-06 and 06-07
Ye s
Yes
No
No
Modify setting
Is load too large
Maybe AC motor drive has malfunction
or misoperation due to noise.

Delta VFD-B Series Specifications

General

Series	VFD-B
Cooling Method	Fan cooling
Overload Capacity	150% for 60 seconds
Braking Unit	Built-in
Control Mode	V/F control, Sensorless Vector Control
Communication	RS-485
Protection Features	Overvoltage, Undervoltage, Overcurrent, Overload, Overtemperature, Short Circuit
Operating Temperature	-10°C to +50°C
Storage Temperature	-20°C to +60°C
Humidity	90% RH (non-condensing)
Altitude	1000m (Derating required above 1000m)