Siemens SINAMICS PERFECT HARMONY GH180 Function Manual page 471

Fault display
xx Humidity Sensor Temp
xx = cell that has alarm
xx Control Fuse Blown
xx = cell that is faulted
xx OverTemp Warning
xx = cell that has alarm
xx Over Temperature
xx = cell that is faulted
xx Device Alarm
xx = cell that has alarm
NXGPro+ Control Manual
Operating Manual, A5E50491925A
Type Enable Potential causes and corrective actions
A Fixed Cause
The humidity sensor temperature reading is below 5 degrees Celsius or
above 60 degrees Celsius.
Action
1. Verify the drive operates within the normal operating conditions as
specified.
2. Verify the 'Verify' if the cooling fans are operating.
3. Verify if filters are clogged and / or need to be replaced.
F Fixed Cause
One or more of the input power fuses to a cell are open.
Action
Determine the reason for the fuse failure then repair, if required, and
replace the fuse.
A SOP Cause
Cell temperature is above the programmable alarm limit. Each cell sends
a PWM signal to the modulator. On AP cells - water-cooled 6SR325, LNG,
and HV AP, the temperature is returned in a word of this protocol.
This signal represents the heat sink temperature. The temperature has
exceeded the alarm level (20% duty cycle default setting.)
Action
1. Check the condition of the cooling system.
2. Check motor load conditions.
F Fixed Cause
Each cell sends a PWM signal to the modulator. On AP cells - water-cooled
6SR325, LNG, and HV AP, the temperature is returned in a word of this
protocol.
This signal represents the heat sink temperature. The temperature has
exceeded the fixed fault level (80% duty cycle).
Action
1. Check the condition of the cooling system.
2. Refer to the Operating Instructions manual.
A Fixed Cause
In water-cooled 6SR325, LNG, and HV cells, a number of conditions are
monitored that put stress on the device (OOS, switching fail, or switch
without command). After a combination of several events occurs, this
pending alarm is set and cannot be cleared. After 18 OOS events occur
(non-sequential) the alarm is set.
Action
1. Acknowledge alarm to continue running until one of the following
options can be done.
2. Replace cell.
3. Replace device in cell. Reset cell internally (Siemens personnel only).
Troubleshooting Faults and Alarms
11.12 Cell Faults and Alarms
469