GAL GALaxy eHydro - Page 134

GALaxy eHydro Elevator Controller Section 6 – Main CPU Faults & Detailed Faults
6-70
Table 6-0: Main CPU Faults
Faults
Description
Possible Cause/Suggested Fix
NTS DNFailed On
NTS DN I/O Failed On
during start. As part of
the redundancy check,
the Main CPU sends a
command to the NTS
processor to turn of
the UN, DN, UT and
DT outputs prior to
turning on any valve
outputs to verify that
the NTS outputs have
not faulted on. During
this process, the DN
output or the DN
input stayed on.
• DN output shorted on. Replace the output module.• DN
input failed on. Replace the input board.• DN test jumper
left on the module. Remove the test jumper.
NTS DT
Failed Off
NTS DT I/O Failed Off
during start. The
controller is
attempting to run the
car high speed in the
down direction but
the DT input is off.
• The DT output failed. Replace the DT output module.
• The NTS processor has turned the DT output off. Check for
errors from the NTS processor.
• The NTS processor has a position error from the APS
selector. Verify the setup of the APS selector and that the
NTS processor is communicating with the selector.
• The Safety PAL has determined that it is unsafe to run the
car such as the doors are open. Check for a Safety Pal Fault
and check
the status of the I/Os of the Safety PAL.
NTS DT
Failed On
NTS DT I/O Failed On
during start. As part of
the redundancy check,
the Main CPU sends a
command to the NTS
processor to turn of
the UN, DN, UT and
DT outputs prior to
turning on any valve
outputs to verify that
the NTS outputs have
not faulted on. During
this process, the DT
output or the DT input
stayed on.
• DT output shorted on. Replace the output module.
• DT input failed on. Replace the input board.
• DT test jumper left on the module. Remove the test
jumper.