264
Maintenance
Section 12-3
* = 2...6 Module number if parallel power units (size 300–1500 A)
12-3 Maintenance
The variable speed drive is designed not to require any servicing or mainte-
nance. There are however some things which must be checked regularly.
All variable speed drives have built-in fan which is speed controlled using
heatsink temperature feedback. This means that the fans are only running if
the VSD is running and loaded. The design of the heatsinks is such that the
fan does not blow the cooling air through the interior of the VSD, but only
Desat
Failure in output stage,
-desaturation of IGBTs
-Hard short circuit between phases or
phase to earth
-Earth fault
-Brake IGBT (up to SX-D4037)
-Check on bad motor cable connections
-Check on bad earth cable connections
-Check on water and moisture in the motor housing
and cable connections
-Check that the rating plate data of the motor is cor-
rectly entered.
-Check the brake resistor, brake IGBT and wiring
-For size G and up, check the cables from the PEBs to
the motor, that all are in correct order in parallel con-
nection.
Desat U+ *
Desat U- *
Desat V+ *
Desat V- *
Desat W+ *
Desat W- *
Desat BCC *
DC link error
DC link voltage ripple exceeds maximum
level
-Make sure all three phases are properly connected
and that the terminal screws are tightened.
-Check that the mains supply voltage is within the lim-
its of the VSD.
-Try to use other mains supply lines if dip is caused by
other machinery.
Power Fault
One of the 10 PF (Power fault) trips below
has occurred, but could not be deter-
mined.
-Check the PF errors and try to determine the cause.
The trip history could be helpful.
PF Fan Err *
Error in fan module
-Check for clogged air inlet filters in panel door and
blocking material in fan module.(SX-D4045 or UP)
PF HCB Err *
Error in controlled rectifier error (HCB)
-Check mains supply voltage (SX-D4030 or UP)
PF Curr Err *
Error in current balancing:
-between different modules
-between two phases within one module..
-Check motor.
-Check fuses and line connections
-Check the individual motor current leads with a clamp
on amp meter.
PF Overvolt *
Error in voltage balancing, overvoltage
detected in one of the power modules
-Check motor.
-Check fuses and line connections.
PF Comm Err *
Internal communication error
Contact service
PF Int Temp *
Internal temperature too high
Check internal fans
PF Temp Err *
Malfunction in temperature sensor
Contact service
PF DC Err *
DC-link error and mains supply fault
-Check mains supply voltage
-Check fuses and line connections.
PF Sup Err *
Mains supply fault
-Check mains supply voltage
-Check fuses and line connections.
Brake
Brake tripped on brake fault (not released
)or Brake not engaged during stop.
-Check Brake acknowledge signal wiring to selected
digital input.
-Check programming of digital input DigIn 1-8, [520].
-Check circuit breaker feeding mechanical brake cir-
cuit.
-Check mechanical brake if acknowledge signal is
wired from brake limit switch.
-Check brake contactor.
-Check settings [33C], [33D], [33E], [33F]
Table 33 Trip condition, their possible causes and remedial action
Trip condition
Possible Cause
Remedy
Summary of Contents for SX-F
Page 2: ......
Page 14: ...6 Table of contents...
Page 20: ...12 Glossary Section 1 6...
Page 32: ...24 Cabinet mounting Section 2 3...
Page 58: ...50 Connecting options Section 5 6...
Page 72: ...64 Load Monitor and Process Protection 400 Section 7 5...
Page 74: ...66 EMC standards Section 8 1...
Page 266: ...258 System Data 900 Section 11 9...
Page 274: ...266 Maintenance Section 12 3...
Page 284: ...276 Liquid cooling Section 13 12...
