Mcsu-4 Alarms - Rectifier RT9- 24V Installation, Operation And Technical Manual

Installation, Operation and Technical Manual
In this case, the message indicates that there are three alarms present and they can be
observed by pressing the ENTER button.
When the ENTER button is pressed the most recent alarm name, such as the one shown
below will appear on the display.
If no button is pressed again for one minute, the display will revert to the "home" screen
and the sequence begins again.
To view the remaining alarms, use INC and DEC buttons. Pressing the ENTER button will
return the display to the "home" screen. The time and date of any given alarm can be
obtained by entering the ALARM LOG menu.

6.3 MCSU-4 Alarms

A list of all the possible alarms that can be enunciated is shown in the following table.
Alarm Name
SMR Alarm
SMR Urgent
SMR HVSD
UNIT OFF
No Response
Power Limit
No Load
Current Limit
Voltage High
Voltage Low
UNCAL SMR
EEPROM Fail
Fan Fail
Relay Fail
No Demand
H/S Temp High
DC-Dc Contr Fail
Temp Sensor Fail
Vref Fail
HVDC not OK
AC Volt Fault – detected
by SMRs
AC Volt Fault – detected
by CSU
158-1872-01
Alarm 1
Amb Temp High
Combination of one or more SMR alarms
One or more SMRs have shut down
SMR shut down due to output over-voltage
SMR is off
A particular SMR is not responding to the MCSU-4
SMR is in Power Limit
SMR output current less than minimum for SMR type used
SMR in current limit
Voltage measured by SMR too high
Voltage measured by SMR too low
SMR Internal Adjustment for current sharing out of limits
EEPROM failed (MCSU-4 or SMR)
SMR Internal Fan failure alarm (only possible on SMRs with fans)
SMR output relay contact failure
Control loop in SMR not in normal state
SMR heatsink temperature too high (where available)
SMR DC/DC converter fault
Temp sensor in SMR faulty - S/C or O/C (where available)
Voltage reference in SMR microprocessor circuit faulty
DC/DC converter (boost) voltage in SMR not OK
All SMRs are reporting AC fault. Available only on some SMR models.
None of SMRS are responding (AC fail assumed), or if AC monitor is
used, AC voltage is out of limits set
(When no AC monitoring module is used, this comes together with "SMR Comms Fault")
Comments
49
Rectifier Technologies
LED
A
A+R
A+R
A+R
A
A
A
A
A
A
A
A
A
A
A
A
A+R
A+R
A+R
A+R
A+R
A
19-Feb-14