Publication 2364F-5.05 - March 1999
3-10
Troubleshooting Faults and Warnings
49
P183 bit 1
I2t Overload
W
The I2t wire protection has tripped the unit
since the heatsink to power module junction
temperature has exceeded the maximum
allowed.
The internal wiring may be at risk of overheating. Check that the
door fans are operating properly, and verify that the RGU is operating
at the appropriately derated current (see the specifications appendix
in 2364F-5.01). Verify that the RGU is not operating in overload for
an extended period of time. Check internal wiring and components
for heat damage (melted wiring or burn marks).
50
P183 bit 2
H/S Hightemp
W
The heatsink temperature has exceeded
80ºC.
Check that the door fans are operating properly. Verify that the RGU
is operating at the appropriately derated current (see the
specifications appendix in 2364F-5.01). Verify that the RGU is not
operating in overload for an extended period of time.
51
P183 bit 3
Reset Req’d
W
The RGU recognizes that a reset is required.
Reset the RGU. Either shut down the RGU and restart, or reset the
RGU through a HIM or GPT.
52
P183 bit 4
NTC Open
W
The RGU has detected that the circuit for the
NTC bridge thermal sensor is open.
Verify that the NTC wiring is in good condition. Check the
connection on the main control board (J2). If necessary, replace the
NTC sensor.
53
P183 bit 5
NTC Short
W
The RGU has detected that the NTC bridge
thermal sensor wires are shorted together.
Verify that the NTC wiring is in good condition. Check the
connection on the main control board (J2). If necessary, replace the
NTC sensor.
54
P183 bit 6
MSTR Faulted
W
The slave RGU has received a faulted status
from the master RGU through the R2R
network.
Check the master RGU fault queue and correct the situation. Shut
down the RGUs in the system. Restart all the RGUs after all the
power has been discharged from the DC bus (restart the master RGU
first).
Note:
‘W’ indicates that the condition is normally reported as a warning, rather than a fault.
Number Fault
Indicates
Action
