Troubleshooting
82
Faults.
Table 17 - Troubleshooting
describes actions that may alleviate the condition or provide
valuable information for technical support.
Faults that initiate an AUTOSHUTDOWN include: MISER, RUNOUT, PWR SPLY VOLT (at high
speed), and will require Service level and higher to reset.
Table 16
Faults—causes and responses
Fault Label
Meaning / Possible Causes
Operator
Clear*
Auto
Clear
Auto
Shutdown
GROUND FAULT
Ground fault current out of range.
X
HW BUS OV
HW overvoltage. (hardware protection)
X
X PHASE OC
AC phase overcurrent. x = A, B, C.
X
IGBT OVRTEMP
IGBT overtemperature.
X
VACUUM FAULT
Drag power exceeds 125W.
X
RUNOUT FAULT
Runout higher than 2.9mil.
X
MISER FAULT
Miser voltage is higher than 5V.
X
BEARING
Magnetic bearing fault.
X
AUX POWER LOW
Auxiliary power supply voltage is low when the
system is in Off mode. Configurable fault.
X
INTER PRCR COMM
Communication error with secondary DSP. System
reboots.
X
PWR SPLY VOLT
Power supply voltage is lower than 19V. (Speed
dependent; auto shutdown at high speed)
X
X
UNDEF PDP INT
Undefined PDP interrupt.
X
CURRENT OFFSET
AC motor current sensor error.
X
SW OV
DC bus voltage is higher than the threshold, which is
service-configurable.
X
CHECKSUM
Calculated checksum does not match the stored
checksum.
S
CONTACTOR TIME OUT
Bus voltage/current is not stable while trying to close
or open contactor.
X
CONTACTOR CLOSE FAIL
Contactor failed to close on startup.
X
FAN OPEN
Fan open circuit or disconnected.
X
FAN SHORT
Fan short circuit.
X
PUMP OPEN
Pump open circuit or disconnected.
X
PUMP SHORT
Pump short circuit.
X
HW OVERSPEED
Hardware detected overspeed.
X
PRECHARGE PROTECTION Stop PWM when large voltage differential exists
between internal and external bus.
X
BUS CURRENT OFFSET
DC current sensor error.
X
S - Indicates a Certified Service Provider will be required to reset system.
NOTE
If a fault recurs after being cleared by the operator, and the condition persists, contact your
Liebert technician.
Содержание Liebert FS Series
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