Diagnostics - Johnson Controls VFD66 Drive User Manual

8

Diagnostics

Do not attempt to carry out internal repairs. Return a faulty drive to the supplier for repair.
WARNING
Trip code Condition
UV DC bus under voltage
OV DC bus over voltage
Drive output instantaneous over
OI.AC**
current
O.SPd Over speed
2
It.AC
I t on drive output current
IGBT over heat based on drives
O.ht1
thermal model
O.ht2 Over heat based on drives heatsink Heatsink temperature exceeds allowable maximum
O.Ld1 User +5V output overload
Drive over-heat based on thermal
O.ht3
model
EEF Internal drive EEPROM trip
Input phase imbalance or input
PH
phase loss
Failure to measure motors stator
rS
resistance
HFxx trip Hardware faults
** These trips cannot be reset for 10 seconds after they occur.
Table 8-1 DC bus voltages
Drive voltage rating
200V
400V
* These are the absolute minimum DC voltages the drives can be supplied by.
NOTE
Table 8-2 Alarm warnings/Display indications
Display
OVLd I x t overload (I = current, t = time)
hot Heatsink/IGBT temperature high
ACLt Drive is in current limit
FAIL Failed attempt to default drive
If no action is taken when an alarm warning appears, the drive will trip on the appropriate fault
NOTE
code.
36
Low AC supply voltage
Deceleration rate set too fast for the inertia of the machine
Line to line output fault detected
Line to ground output fault detected
Excessive motor speed
Excessive mechanical load
High impedance phase to phase or phase to ground short
circuit at drive output
Overheat software thermal model
Excessive load or short circuit on +5V output
Overheat software thermal model
Possible loss of parameter values
(set default parameters (see Pr 29 on page 32))
One of the input phases has become disconnected from the
drive
Motor too small for drive
Motor cable disconnected during measurement
Internal drive hardware fault
UV Trip
175
330
Condition
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Possible cause
UV Reset
215 *
425 *
Reduce motor current (Load)
Reduce ambient temperature or reduce motor current
Increase ramp time
An attempt has been made to default the drive when the drive
was not disabled or tripped.
OV trip
415
830
Solution
VFD66 User Guide
Issue Number: 2