Rectifier RT9- 24V - Page 84

Installation, Operation and Technical Manual Rectifier Technologies
158-1872-01 80 19-Feb-14
Alarm Condition
Possible Cause
Action Suggested
No Load
Load circuit breakers have tripped and
there is no load
Reset circuit breakers
If only one unit showing alarm, comms
line to SMR may be faulty
In SMR menu check status of this SMR.
If “No Response” replace comms line
Faulty SMR
Replace SMR
Current Limit
Batteries being recharged if more than
one unit showing alarm
No action required
If only one unit shows alarm, internal
control loop faulty
Replace SMR
No Demand
Internal control loop faulty
Replace SMR
System has no load
No Action Required
EEPROM Fail
Faulty EEPROM or microprocessor card
Replace SMR
DDC Controller
Fault in DC/DC converter
Replace SMR
H/S Temp High
SMR Heat sink temperature too high
Check air intake to SMR is not blocked
Ambient temperature is too high
Try to reduce ambient temperature
Microprocessor card is faulty
Replace SMR
Temp Sensor Fail
Temperature sensor is faulty
Replace SMR
Fan Fail
(Fan cooled nits only)
Air flow inadequate due to dirty filter
Clean or replace filter
Air intake/outlet blocked
Remove air blockage
Fan faulty
Replace fan if connection is OK
Reference Fail
Reference voltage source in, or entire
microprocessor card is faulty
Replace SMR
HVDC not OK
Faulty boost controller
Replace SMR
Inrush limiting fuse or resistor O/C
Replace SMR
High Volts SD
Feedback voltage circuit faulty
Replace SMR
Faulty microprocessor card
Replace SMR
LVDS Open
Battery discharged to the limit voltage
level due to no AC power
Check AC voltage and reset if possible
Battery voltage OK
In BATT menu check if LVDS mode is
set to “Open”.
Battery voltage OK, MCSU-4 faulty
Replace MCSU-4
LVDS threshold level set too high
Reset level in BATT menu
Sys Volts High
Volts High level in MCSU-4 set too low
Reset level to correct value
Temperature compensation coefficient
set too high
Set correct temperature compensation
coefficient
Faulty MUIB or MCSU-4
Replace MCSU-4
Sys Volts Low
Volts Low threshold in MCSU-4 too high
Reset level to correct value
Temperature compensation coefficient
set too high
Set correct temperature compensation
coefficient
Faulty MUIB or MCSU-4
Replace MCSU-4