Rectifier MCSU-4 - Page 83

Installation, Operation and Technical Manual Rectifier Technologies
158-1872-01 79 19-Feb-14
Alarm Condition
Possible Cause
Action Suggested
Batt Temp High
Battery temperature higher than pre-set
level
Check battery temperatures and if
necessary increase ventilation and
cooling
Set point is too low
Check Batt Temp High threshold level
and re-adjust if necessary
Temp Sensor N/A
Temperature Sensor in MCSU-4 not
attached or faulty
Plug in temperature sensor if required;
Replace temperature sensor
Faulty MUIB connection(s)
Replace MUIB
Faulty MCSU-4 card
Replace MCSU-4
Volts High
SMR fault
SMR Fault Chart
Float level set too high on MCSU-4
Check and adjust if necessary
MCSU-4 fault
Replace MCSU-4
Volts Low
AC power has failed; system on battery
power
Restore AC power if possible
Alarm threshold level set too high
Check set point and adjust if necessary
All SMRs are off due to MCSU-4 Inhibit
signal, system on battery power
Check reason for signal; if necessary
replace MCSU-4
Battery charging current limiting due to
faulty battery current signal - this will
depress float voltage
Check battery currents. If one of them
shows figure higher than Batt Chg Curr
Lim set point, check corresponding
current transducer; check connections to
transducer; check MUIB connections
Battery Temperature Compensation too
high due to faulty battery temperature
monitoring
Check battery temperature readings in
Batt menu; Check and if necessary
replace faulty sensor; check connection
to MUIB
Battery Temperature Compensation too
high due to faulty MUIB
Replace MUIB
SMR HVSD
Output voltage too high due to SMR fault
Replace faulty SMR
HVSD threshold on SMRs set too low
Check and re-adjust threshold level
MCSU-4 fault
Replace MCSU-4
SMRs not sharing
load current
Communications link malfunctioning or
faulty rectifier (digital current control)
Replace Comms cable and/or SMR
Faulty MCSU-4 voltage and current
control loop IODEM signal (analog active
current control)
Replace MCSU-4
Float or Equalise level on MCSU-4 set
too high/too low.
Check and re-adjust Float or Equalise
level on MCSU-4
No Response
SMR not responding to MCSU-4
Check and if necessary replace comms
cable at back of magazine faulty
Faulty microprocessor card in SMR
Replace SMR
Power Limit
Unit not current sharing (if only one
showing power limit)
Replace SMR
Load current too high (if more than one
unit showing alarm)
Reduce load
Reduce battery charging current limit if it
is too high