McQuay WSC Operating Manual page 92

Fault/
Log
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92
Fault
Fault/Event
Clas
Recorder Text
s
Crit Unauthorized RUN
Crit Shorted SCR
Crit Shorted SCR
Crit Shorted SCR
Crit Shorted SCR
Crit Shorted SCR
Crit Shorted SCR
NonC No Mains Power
Crit I. O. C.
Blank Log
Log:Disconnect O
Log:DIR Change
Start Commanded
Stop Commanded
Stop Complete
Log: System UTS
Log:BIST Entered
Log:BIST Passed
Log:Password CLR
Log:Events CLR
Log:System Reset
Log:Hardware PWR
UP
Log:Emerg Reset
Log:Time
Changed
PWR Ret BYP IN
PWR Ret BYP OUT
PWR Loss Voltage
PWR Loss Current
PORT BYP Open
Log:System Reset
RTD Warn Limit
Log:Loss of SYNC
Log:If Ctrl Mode
Log:By-Pass Drop
Log:OL Warn
Log:OL Lock
Description/Possible Solutions
The start/stop circuitry has failed.
A fast start/stop sequence was performed.
Check wire connected to terminal JC13-3.
A shorted SCR on line 1 was detected
• Check all 3 SCRs for shorts
A shorted SCR on line 2 was detected.
Check all 3 SCRs for shorts
A shorted SCR on line 3 was detected
Check all 3 SCRs with ohmmeter for shorts.
Shorted SCRs on line 2 and 3 were detected
Check all 3 SCRs with ohmmeter for shorts.
Shorted SCRs on line 1 and 3 were detected
Check all 3 SCRs with ohmmeter for shorts.
Shorted SCRs on line 1 and 2 were detected
Check all 3 SCRs with ohmmeter for shorts.
A start was commanded while no line power was detected.
A very high current was detected.
Check the motor and wiring for short circuits.
Blank Log.
Log:Disconnect open.
The direction of the starter was changed.
A start command was given.
A stop command was given.
The stop sequence is complete and the starter has removed power
from the motor.
Log: System UTS (up to speed).
Log:BIST entered.
Log:BIST passed.
Log:Password cleared.
Log:Event log cleared.
Log:System Reset.
Log:Hardware PWR UP.
Log:Emergency reset.
Log:Time changed.
Line power returned while the bypass contactor was in.
Line power returned after the bypass contactor was dropped out.
PORT mode was entered due to low line voltage.
PORT mode was entered due to loss of current.
Bypass contactor was dropped out while in PORT mode.
The unit was reset.
One of the RTD warning set points was exceeded.
Log:Loss of SYNC.
Log:If Ctrl Mode.
The integral bypass contactors dropped out and were re-energized.
Possible short term drop in line voltage.
The thermal overload went above 90% thermal content.
The thermal overload tripped.
Check motor and load for cause of overload.
OM Centrif Micro ΙΙ-5